This chapter contains reference material for each supported vector intrinsic. The information for each intrinsic includes: The intrinsic name and extended name; A type-free example of the intrinsic's usage; A description of the intrinsic's purpose; A description of the value(s) returned from the intrinsic, if any; A description of any unusual characteristics of the intrinsic when different target endiannesses are in force. If the semantics of the intrinsic in big-endian and little-endian modes are identical, the description will read "None."; Optionally, additional explanatory notes about the intrinsic; and A table of supported type signatures for the intrinsic. Most intrinsics are overloaded, supporting multiple type signatures. The types of the input arguments always determine the type of the result argument; that is, it is not possible to define two intrinsic overloads with the same input argument types and different result argument types. The type-free example of the intrinsic's usage uses the convention that r represents the result of the intrinsic, and a, b, etc., represent the input arguments. The allowed type combinations of these variables are shown as rows in the table of supported type signatures. Each row contains at least one example implementation. This shows one way that a conforming compiler might achieve the intended semantics of the intrinsic, but compilers are not required to generate this code specifically. The letters r, a, b, etc., in the examples represent vector registers containing the values of those variables. The letters t, u, etc., represent vector registers containing temporary intermediate results. The same register is assumed to be used for each instance of one of these letters. When implementations differ for big- and little-endian targets, separate example implementations are shown for each endianness. The implementations show a sequence of instructions that may be used in the implementation of a particular intrinsic, and usually include vector instructions. When trying to determine which intrinsic to use, it can be useful to have a cross-reference from a specific vector instruction to the intrinsics whose implementations make use of it. This manual contains such a cross-reference () for the programmer's convenience. For some intrinsics, restrictions are shown in the implementation table for some of the rows. Possible restrictions include: ISA 3.0 or later. This form is only available starting with PowerISA 3.0, corresponding to POWER9 servers. The Power Vector Library (see provides equivalent POWER7/POWER8 implementations for many ISA 3.0 vector instructions, which may be preferred for portability. Deprecated. This form of the intrinsic is currently available, but may be removed in the future. Programmers are discouraged from using it.

Some intrinsic descriptions indicate that either modular arithmetic or saturating arithmetic is used. This refers to what happens when an operation overflows the number of available bits. A modular operation that overflows truncates the result on the left, also known as wrapping the result. A saturating operation that overflows produces the largest (or smallest) possible result representable in the output element type. Operands are sometimes represented as having a const int type. In such cases, the programmer is expected to provide an integer literal. When the literal has specific required bounds, this is often represented instead by such phrases as "5-bit signed literal" or "2-bit unsigned literal" to specify them. In such cases, compilers are encouraged to at least warn upon detecting an out-of-range value. Providing a variable when a literal is required is a compile-time error.

Vector Absolute Value r = vec_abs (a) Purpose: Returns a vector r that contains the absolute values of the contents of the vector a. Result value: The value of each element of r is the absolute value of the corresponding element of a. For integer vectors, the arithmetic is modular. Endian considerations: None. vspltisw vec_abs vsububm vec_abs vmaxsb vec_abs vsubuwm vec_abs vmaxsw vec_abs vsubudm vec_abs vmaxsd vec_abs xvabssp vec_abs xvabsdp vec_abs r a Example Implementation vector signed char vector signed char vspltisw t,0 vsububm t,t,a vmaxsb r,t,a vector signed short vector signed short vspltisw t,0 vsubuhm t,t,a vmaxsh r,t,a vector signed int vector signed int vspltisw t,0 vsubuwm t,t,a vmaxsw r,t,a vector signed long long vector signed long long vspltisw t,0 vsubudm t,t,a vmaxsd r,t,a vector float vector float xvabssp r,a vector double vector double xvabsdp r,a Vector Absolute Difference r = vec_absd (a, b) Purpose: Computes the absolute difference of two vectors. Result value: The value of each element of r is the absolute difference of the corresponding elements of a and b, using modular arithmetic. Endian considerations: None. vabsdub vec_absd vabsduh vec_absd vabsduw vec_absd r a b Example Implementation Restrictions vector unsigned char vector unsigned char vector unsigned char vabsdub r,a,b ISA 3.0 or later vector unsigned short vector unsigned short vector unsigned short vabsduh r,a,b ISA 3.0 or later vector unsigned int vector unsigned int vector unsigned int vabsduw r,a,b ISA 3.0 or later Vector Absolute Value Saturated r = vec_abss (a) Purpose: Returns a vector r that contains the saturated absolute values of the contents of the vector a. Result value: The value of each element of r is the saturated absolute value of the corresponding element of a. Endian considerations: None. vspltisb vec_abss vsubsbs vec_abss vmaxsb vec_abss vspltish vec_abss vsubshs vec_abss vmaxsh vec_abss vspltisw vec_abss vsubsws vec_abss vmaxsw vec_abss r a Example Implementation vector signed char vector signed char vspltisb t,0 vsubsbs t,t,a vmaxsb r,t,a vector signed short vector signed short vspltish t,0 vsubshs t,t,a vmaxsh r,t,a vector signed int vector signed int vspltisw t,0 vsubsws t,t,a vmaxsw r,t,a Vector Addition r = vec_add (a, b) Purpose: Computes the sum of two vectors. Result value: The value of each element of r is the sum of the corresponding elements of a and b. Modular arithmetic is used for both signed and unsigned integers. Endian considerations: None. vaddubm vec_add vadduhm vec_add vadduwm vec_add vaddudm vec_add vadduqm vec_add xvaddsp vec_add xvadddp vec_add r a b Example Implementation vector signed char vector signed char vector signed char vaddubm r,a,b vector unsigned char vector unsigned char vector unsigned char vaddubm r,a,b vector signed short vector signed short vector signed short vadduhm r,a,b vector unsigned short vector unsigned short vector unsigned short vadduhm r,a,b vector signed int vector signed int vector signed int vadduwm r,a,b vector unsigned int vector unsigned int vector unsigned int vadduwm r,a,b vector signed long long vector signed long long vector signed long long vaddudm r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vaddudm r,a,b vector signed __int128 vector signed __int128 vector signed __int128 vadduqm r,a,b vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vadduqm r,a,b vector float vector float vector float xvaddsp r,a,b vector double vector double vector double xvadddp r,a,b Vector Add Carrying r = vec_addc (a, b) Purpose: Returns a vector of carries produced by adding two vectors. Result value: The value of each element of r is the carry produced by adding the corresponding elements of a and b (1 if there is a carry, 0 otherwise). Endian considerations: None. vaddcuw vec_addc vaddcuq vec_addc r a b Example Implementation vector signed int vector signed int vector signed int vaddcuw r,a,b vector unsigned int vector unsigned int vector unsigned int vaddcuw r,a,b vector signed __int128 vector signed __int128 vector signed __int128 vaddcuq r,a,b vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vaddcuq r,a,b Vector Add Extended r = vec_adde (a, b, c) Purpose: Returns a vector formed as the sum of two vectors and a carry vector. Result value: The value of each element of r is produced by adding the corresponding elements of a and b with a carry specified in the corresponding element of c (1 if there is a carry, 0 otherwise). Endian considerations: None. Notes: Code generated for this intrinsic should ensure only the low-order bit of c participates in the sum. vspltisw vec_adde vadduwm vec_adde xxland vec_adde vaddeuqm vec_adde r a b c Example Implementation vector signed int vector signed int vector signed int vector signed int vspltisw t,1 vadduwm r,a,b xxland c,c,t vadduwm r,r,c vector unsigned int vector unsigned int vector unsigned int vector unsigned int vspltisw t,1 vadduwm r,a,b xxland c,c,t vadduwm r,r,c vector signed __int128 vector signed __int128 vector signed __int128 vector signed __int128 vaddeuqm r,a,b,c vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vaddeuqm r,a,b,c Vector Add Extended Carrying r = vec_addec (a, b, c) Purpose: Returns a vector of carries produced by adding two vectors and a carry vector. Result value: The value of each element of r is the carry produced by adding the corresponding elements of a and b and a carry specified in the corresponding element of c (1 if there is a carry, 0 otherwise). Endian considerations: None. Notes: Code generated for this intrinsic should ensure only the low-order bit of c participates in the sum. vspltisw vec_addec xxland vec_addec vadduwm vec_addec vaddcuw vec_addec xxlor vec_addec vaddecuq vec_addec r a b c Example Implementation vector signed int vector signed int vector signed int vector signed int vspltisw t,1 xxland u,c,t vadduwm v,a,b vaddcuw w,a,b vaddcuw x,v,u xxlor r,w,x vector unsigned int vector unsigned int vector unsigned int vector unsigned int vspltisw t,1 xxland u,c,t vadduwm v,a,b vaddcuw w,a,b vaddcuw x,v,u xxlor r,w,x vector signed __int128 vector signed __int128 vector signed __int128 vector signed __int128 vaddecuq r,a,b,c vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vaddecuq r,a,b,c Vector Add Saturating r = vec_adds (a, b) Purpose: Computes the saturated sum of two vectors. Result value: The value of each element of r is the saturated sum of the corresponding elements of a and b. Endian considerations: None. vaddsbs vec_adds vaddubs vec_adds vaddshs vec_adds vadduhs vec_adds vaddsws vec_adds vadduws vec_adds r a b Example Implementation vector signed char vector signed char vector signed char vaddsbs r,a,b vector unsigned char vector unsigned char vector unsigned char vaddubs r,a,b vector signed short vector signed short vector signed short vaddshs r,a,b vector unsigned short vector unsigned short vector unsigned short vadduhs r,a,b vector signed int vector signed int vector signed int vaddsws r,a,b vector unsigned int vector unsigned int vector unsigned int vadduws r,a,b Vector All Equal r = vec_all_eq (a, b) Purpose: Tests whether all elements of a are equal to the corresponding elements of b. Result value: r is 1 if each element of a is equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpequb. vec_all_eq mfocrf vec_all_eq rlwinm vec_all_eq vcmpequw. vec_all_eq vcmpequd. vec_all_eq vcmpequh. vec_all_eq xvcmpeqdp. vec_all_eq xvcmpeqsp. vec_all_eq r a b Example Implementation int vector bool char vector bool char vcmpequb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed char vector signed char vcmpequb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned char vector unsigned char vcmpequb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool short vector bool short vcmpequh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed short vector signed short vcmpequh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned short vector unsigned short vcmpequh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector pixel vector pixel vcmpequh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool int vector bool int vcmpequw. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed int vector signed int vcmpequw. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned int vector unsigned int vcmpequw. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool long long vector bool long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed long long vector signed long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned long long vector unsigned long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector float vector float xvcmpeqsp. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector double vector double xvcmpeqdp. t,a,b mfocrf u,2 rlwinm r,u,25,1 Vector All Greater or Equal r = vec_all_ge (a, b) Purpose: Tests whether all elements of a are greater than or equal to the corresponding elements of b. Result value: r is 1 if all elements of a are greater than or equal to the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_all_ge mfocrf vec_all_ge rlwinm vec_all_ge vcmpgtub. vec_all_ge vcmpgtsw. vec_all_ge vcmpgtuw. vec_all_ge vcmpgtsd. vec_all_ge vcmpgtud. vec_all_ge vcmpgtsh. vec_all_ge vcmpgtuh. vec_all_ge xvcmpgedp. vec_all_ge xvcmpgesp. vec_all_ge r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector unsigned char vector unsigned char vcmpgtub. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector signed short vector signed short vcmpgtsh. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector unsigned short vector unsigned short vcmpgtuh. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector signed int vector signed int vcmpgtsw. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector unsigned int vector unsigned int vcmpgtuw. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector signed long long vector signed long long vcmpgtsd. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector unsigned long long vector unsigned long long vcmpgtud. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector float vector float xvcmpgesp. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector double vector double xvcmpgedp. t,a,b mfocrf u,2 rlwinm r,u,25,1 Vector All Greater Than r = vec_all_gt (a, b) Purpose: Tests whether all elements of a are greater than the corresponding elements of b. Result value: r is 1 if all elements of a are greater than the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_all_gt mfocrf vec_all_gt rlwinm vec_all_gt vcmpgtub. vec_all_gt vcmpgtsw. vec_all_gt vcmpgtuw. vec_all_gt vcmpgtsd. vec_all_gt vcmpgtud. vec_all_gt vcmpgtsh. vec_all_gt vcmpgtuh. vec_all_gt xvcmpgtdp. vec_all_gt xvcmpgtsp. vec_all_gt r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned char vector unsigned char vcmpgtub. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed short vector signed short vcmpgtsh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned short vector unsigned short vcmpgtuh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed int vector signed int vcmpgtsw. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned int vector unsigned int vcmpgtuw. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed long long vector signed long long vcmpgtsd. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned long long vector unsigned long long vcmpgtud. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector float vector float xvcmpgtsp. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector double vector double xvcmpgtdp. t,a,b mfocrf u,2 rlwinm r,u,25,1 Vector All In Range r = vec_all_in (a, b) Purpose: Tests whether all elements of a vector are within a given range. Result value: r is 1 if each element of a has a value less than or equal to the value of the corresponding element of b, and greater than or equal to the negative of the value of the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpbfp. vec_all_in mfocrf vec_all_in rlwinm vec_all_in r a b Example Implementation int vector float vector float vcmpbfp. t,a,b mfocrf u,2 rlwinm r,u,27,1 Vector All Less or Equal r = vec_all_le (a, b) Purpose: Tests whether all elements of a are less than or equal to the corresponding elements of b. Result value: r is 1 if all elements of a are less than or equal to the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_all_le mfocrf vec_all_le rlwinm vec_all_le vcmpgtub. vec_all_le vcmpgtsw. vec_all_le vcmpgtuw. vec_all_le vcmpgtsd. vec_all_le vcmpgtud. vec_all_le vcmpgtsh. vec_all_le vcmpgtuh. vec_all_le xvcmpgedp. vec_all_le xvcmpgesp. vec_all_le r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector unsigned char vector unsigned char vcmpgtub. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector signed short vector signed short vcmpgtsh. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector unsigned short vector unsigned short vcmpgtuh. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector signed int vector signed int vcmpgtsw. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector unsigned int vector unsigned int vcmpgtuw. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector signed long long vector signed long long vcmpgtsd. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector unsigned long long vector unsigned long long vcmpgtud. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector float vector float xvcmpgesp. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector double vector double xvcmpgedp. t,b,a mfocrf u,2 rlwinm r,u,25,1 Vector All Less Than r = vec_all_lt (a, b) Purpose: Tests whether all elements of a are less than the corresponding elements of b. Result value: r is 1 if all elements of a are less than the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_all_lt mfocrf vec_all_lt rlwinm vec_all_lt vcmpgtub. vec_all_lt vcmpgtsw. vec_all_lt vcmpgtuw. vec_all_lt vcmpgtsd. vec_all_lt vcmpgtud. vec_all_lt vcmpgtsh. vec_all_lt vcmpgtuh. vec_all_lt xvcmpgtdp. vec_all_lt xvcmpgtsp. vec_all_lt r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector unsigned char vector unsigned char vcmpgtub. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector signed short vector signed short vcmpgtsh. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector unsigned short vector unsigned short vcmpgtuh. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector signed int vector signed int vcmpgtsw. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector unsigned int vector unsigned int vcmpgtuw. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector signed long long vector signed long long vcmpgtsd. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector unsigned long long vector unsigned long long vcmpgtud. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector float vector float xvcmpgtsp. t,b,a mfocrf u,2 rlwinm r,u,25,1 int vector double vector double xvcmpgtdp. t,b,a mfocrf u,2 rlwinm r,u,25,1 Vector All Not-a-Number r = vec_all_nan (a) Purpose: Tests whether all elements of a are not-a-number (NaN). Result value: r is 1 if all elements of a are NaN. Otherwise, r is 0. Endian considerations: None. xvcmpeqdp. vec_all_nan mfocrf vec_all_nan rlwinm vec_all_nan xvcmpeqsp. vec_all_nan r a Example Implementation int vector float xvcmpeqsp. t,a,a mfocrf u,2 rlwinm r,u,27,1 int vector double xvcmpeqdp. t,a,a mfocrf u,2 rlwinm r,u,27,1 Vector All Not Equal r = vec_all_ne (a, b) Purpose: Tests whether all elements of a are not equal to the corresponding elements of b. Result value: r is 1 if all elements of a are not equal to the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. vcmpneb. vec_all_ne mfocrf vec_all_ne rlwinm vec_all_ne vcmpnew. vec_all_ne vcmpequd. vec_all_ne vcmpneh. vec_all_ne xvcmpeqdp. vec_all_ne xvcmpeqsp. vec_all_ne r a b Example Implementation int vector bool char vector bool char vcmpneb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed char vector signed char vcmpneb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned char vector unsigned char vcmpneb. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool short vector bool short vcmpneh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed short vector signed short vcmpneh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned short vector unsigned short vcmpneh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector pixel vector pixel vcmpneh. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool int vector bool int vcmpnew. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector signed int vector signed int vcmpnew. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector unsigned int vector unsigned int vcmpnew. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector bool long long vector bool long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector signed long long vector signed long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector unsigned long long vector unsigned long long vcmpequd. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector float vector float xvcmpeqsp. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector double vector double xvcmpeqdp. t,a,b mfocrf u,2 rlwinm r,u,27,1 Vector All Not Greater or Equal r = vec_all_nge (a, b) Purpose: Tests whether all elements of a are not greater than or equal to the corresponding elements of b. Result value: r is 1 if all elements of a are not greater than or equal to the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. xvcmpeqdp. vec_all_nge mfocrf vec_all_nge rlwinm vec_all_nge xvcmpeqsp. vec_all_nge r a b Example Implementation int vector float vector float xvcmpgesp. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector double vector double xvcmpgedp. t,a,b mfocrf u,2 rlwinm r,u,27,1 Vector All Not Greater Than r = vec_all_ngt (a, b) Purpose: Tests whether all elements of a are not greater than the corresponding elements of b. Result value: r is 1 if all elements of a are not greater than the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. xvcmpgtdp. vec_all_ngt mfocrf vec_all_ngt rlwinm vec_all_ngt xvcmpgtsp. vec_all_ngt r a b Example Implementation int vector float vector float xvcmpgtsp. t,a,b mfocrf u,2 rlwinm r,u,27,1 int vector double vector double xvcmpgtdp. t,a,b mfocrf u,2 rlwinm r,u,27,1 Vector All Not Less or Equal r = vec_all_nle (a, b) Purpose: Tests whether all elements of a are not less than or equal to the corresponding elements of b. Result value: r is 1 if all elements of a are not less than or equal to the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. xvcmpgedp. vec_all_nle mfocrf vec_all_nle rlwinm vec_all_nle xvcmpgesp. vec_all_nle r a b Example Implementation int vector float vector float xvcmpgesp. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector double vector double xvcmpgedp. t,b,a mfocrf u,2 rlwinm r,u,27,1 Vector All Not Less Than r = vec_all_nlt (a, b) Purpose: Tests whether all elements of a are not less than the corresponding elements of b. Result value: r is 1 if all elements of a are not less than the corresponding elements of b. Otherwise, r is 0. Endian considerations: None. xvcmpgtdp. vec_all_nlt mfocrf vec_all_nlt rlwinm vec_all_nlt xvcmpgtsp. vec_all_nlt r a b Example Implementation int vector float vector float xvcmpgtsp. t,b,a mfocrf u,2 rlwinm r,u,27,1 int vector double vector double xvcmpgtdp. t,b,a mfocrf u,2 rlwinm r,u,27,1 Vector All Numeric r = vec_all_numeric (a) Purpose: Tests whether all elements of the vector are numeric (not NaN). Result value: r is 1 if all elements of a are numeric (not NaN). Otherwise, r is 0. Endian considerations: None. xvcmpeqdp. vec_all_numeric mfocrf vec_all_numeric rlwinm vec_all_numeric xvcmpeqsp. vec_all_numeric r a Example Implementation int vector float xvcmpeqsp. t,a,b mfocrf u,2 rlwinm r,u,25,1 int vector double xvcmpeqdp. t,a,b mfocrf u,2 rlwinm r,u,25,1 Vector AND r = vec_and (a, b) Purpose: Performs a bitwise AND of two vectors. Result value: The value of r is the bitwise AND of a and b. Endian considerations: None. xxland vec_and r a b Example Implementation Restrictions vector bool char vector bool char vector bool char xxland r,a,b vector signed char vector signed char vector signed char xxland r,a,b vector unsigned char vector unsigned char vector unsigned char xxland r,a,b vector bool short vector bool short vector bool short xxland r,a,b vector signed short vector signed short vector signed short xxland r,a,b vector unsigned short vector unsigned short vector unsigned short xxland r,a,b vector signed int vector signed int vector signed int xxland r,a,b vector bool int vector bool int vector bool int xxland r,a,b vector unsigned int vector unsigned int vector unsigned int xxland r,a,b vector bool long long vector bool long long vector bool long long xxland r,a,b vector signed long long vector signed long long vector signed long long xxland r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxland r,a,b vector float vector float vector float xxland r,a,b vector double vector double vector double xxland r,a,b Vector AND with Complement r = vec_andc (a, b) Purpose: Performs a bitwise AND of one vector with the bitwise complement of another vector. Result value: The value of r is the bitwise AND of a with the bitwise complement of b. Endian considerations: None. xxlandc vec_andc r a b Example Implementation Restrictions vector bool char vector bool char vector bool char xxlandc r,a,b vector signed char vector signed char vector signed char xxlandc r,a,b vector unsigned char vector unsigned char vector unsigned char xxlandc r,a,b vector bool short vector bool short vector bool short xxlandc r,a,b vector signed short vector signed short vector signed short xxlandc r,a,b vector unsigned short vector unsigned short vector unsigned short xxlandc r,a,b vector signed int vector signed int vector signed int xxlandc r,a,b vector bool int vector bool int vector bool int xxlandc r,a,b vector unsigned int vector unsigned int vector unsigned int xxlandc r,a,b vector bool long long vector bool long long vector bool long long xxlandc r,a,b vector signed long long vector signed long long vector signed long long xxlandc r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlandc r,a,b vector float vector float vector float xxlandc r,a,b vector double vector double vector double xxlandc r,a,b Vector Any Equal r = vec_any_eq (a, b) Purpose: Tests whether any element of a is equal to the corresponding element of b. Result value: r is 1 if any element of a is equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpneb. vec_any_eq mfocrf vec_any_eq rlwinm vec_any_eq cntlzw vec_any_eq srwi vec_any_eq vcmpnew. vec_any_eq vcmpequd. vec_any_eq vcmpneh. vec_any_eq xvcmpeqdp. vec_any_eq xvcmpeqsp. vec_any_eq r a b Example Implementation int vector bool char vector bool char vcmpneb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed char vector signed char vcmpneb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpneb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool short vector bool short vcmpneh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpneh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpneh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector pixel vector pixel vcmpneh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool int vector bool int vcmpnew. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpnew. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpnew. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool long long vector bool long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector float vector float xvcmpeqsp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpeqdp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Greater or Equal r = vec_any_ge (a, b) Purpose: Tests whether any element of a is greater than or equal to the corresponding element of b. Result value: r is 1 if any element of a is greater than or equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_any_ge mfocrf vec_any_ge rlwinm vec_any_ge cntlzw vec_any_ge srwi vec_any_ge vcmpgtub. vec_any_ge vcmpgtsw. vec_any_ge vcmpgtuw. vec_any_ge vcmpgtsd. vec_any_ge vcmpgtud. vec_any_ge vcmpgtsh. vec_any_ge vcmpgtuh. vec_any_ge xvcmpgedp. vec_any_ge xvcmpgesp. vec_any_ge r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpgtub. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpgtsw. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpgtuw. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpgtsd. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpgtud. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpgtsh. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpgtuh. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgedp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector float vector float vcmpgesp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Greater Than r = vec_any_gt (a, b) Purpose: Tests whether any element of a is greater than the corresponding element of b. Result value: r is 1 if any element of a is greater than the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_any_gt mfocrf vec_any_gt rlwinm vec_any_gt cntlzw vec_any_gt srwi vec_any_gt vcmpgtub. vec_any_gt vcmpgtsw. vec_any_gt vcmpgtuw. vec_any_gt vcmpgtsd. vec_any_gt vcmpgtud. vec_any_gt vcmpgtsh. vec_any_gt vcmpgtuh. vec_any_gt xvcmpgtdp. vec_any_gt xvcmpgtsp. vec_any_gt r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpgtub. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpgtsh. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpgtuh. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpgtsw. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpgtuw. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpgtsd. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpgtud. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector float vector float xvcmpgtsp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgtdp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Less or Equal r = vec_any_le (a, b) Purpose: Tests whether any element of a is less than or equal to the corresponding element of b. Result value: r is 1 if any element of a is less than or equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_any_le mfocrf vec_any_le rlwinm vec_any_le cntlzw vec_any_le srwi vec_any_le vcmpgtub. vec_any_le vcmpgtsw. vec_any_le vcmpgtuw. vec_any_le vcmpgtsd. vec_any_le vcmpgtud. vec_any_le vcmpgtsh. vec_any_le vcmpgtuh. vec_any_le xvcmpgedp. vec_any_le xvcmpgesp. vec_any_le r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpgtub. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpgtsh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpgtuh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpgtsw. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpgtuw. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpgtsd. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpgtud. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector float vector float xvcmpgesp. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgedp. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Less Than r = vec_any_lt (a, b) Purpose: Tests whether any element of a is less than the corresponding element of b. Result value: r is 1 if any element of a is less than the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpgtsb. vec_any_lt mfocrf vec_any_lt rlwinm vec_any_lt cntlzw vec_any_lt srwi vec_any_lt vcmpgtub. vec_any_lt vcmpgtsw. vec_any_lt vcmpgtuw. vec_any_lt vcmpgtsd. vec_any_lt vcmpgtud. vec_any_lt vcmpgtsh. vec_any_lt vcmpgtuh. vec_any_lt xvcmpgtdp. vec_any_lt xvcmpgtsp. vec_any_lt r a b Example Implementation int vector signed char vector signed char vcmpgtsb. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpgtub. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpgtsh. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpgtuh. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpgtsw. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpgtuw. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpgtsd. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpgtud. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector float vector float xvcmpgtsp. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgtdp. t,b,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Not-a-Number r = vec_any_nan (a) Purpose: Tests whether any element of the source vector is a NaN. Result value: r is 1 if any element of a is a NaN. Otherwise, r is 0. Endian considerations: None. xvcmpeqdp. vec_any_nan mfocrf vec_any_nan rlwinm vec_any_nan cntlzw vec_any_nan srwi vec_any_nan xvcmpeqsp. vec_any_nan r a Example Implementation int vector float xvcmpeqsp. t,a,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double xvcmpeqdp. t,a,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Not Equal r = vec_any_ne (a, b) Purpose: Tests whether any element of a is not equal to the corresponding element of b. Result value: r is 1 if any element of a is not equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpequb. vec_any_ne mfocrf vec_any_ne rlwinm vec_any_ne cntlzw vec_any_ne srwi vec_any_ne vcmpequw. vec_any_ne vcmpequd. vec_any_ne vcmpequh. vec_any_ne xvcmpeqdp. vec_any_ne xvcmpeqsp. vec_any_ne r a b Example Implementation int vector bool char vector bool char vcmpequb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed char vector signed char vcmpequb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned char vector unsigned char vcmpequb. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool short vector bool short vcmpequh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed short vector signed short vcmpequh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned short vector unsigned short vcmpequh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector pixel vector pixel vcmpequh. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool int vector bool int vcmpequw. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed int vector signed int vcmpequw. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned int vector unsigned int vcmpequw. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector bool long long vector bool long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector signed long long vector signed long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector unsigned long long vector unsigned long long vcmpequd. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector float vector float xvcmpeqsp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpeqdp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Not Greater or Equal r = vec_any_nge (a, b) Purpose: Tests whether any element of a is not greater than or equal to the corresponding element of b. Result value: r is 1 if any element of a is not greater than or equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. xvcmpgedp. vec_any_nge mfocrf vec_any_nge rlwinm vec_any_nge cntlzw vec_any_nge srwi vec_any_nge xvcmpgesp. vec_any_nge r a b Example Implementation int vector float vector float xvcmpgesp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgedp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Not Greater Than r = vec_any_ngt (a, b) Purpose: Tests whether any element of a is not greater than the corresponding element of b. Result value: r is 1 if any element of a is not greater than the corresponding element of b. Otherwise, r is 0. Endian considerations: None. xvcmpgtdp. vec_any_ngt mfocrf vec_any_ngt rlwinm vec_any_ngt cntlzw vec_any_ngt srwi vec_any_ngt xvcmpgtsp. vec_any_ngt r a b Example Implementation int vector float vector float xvcmpgtsp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgtdp. t,a,b mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Not Less or Equal r = vec_any_nle (a, b) Purpose: Tests whether any element of a is not less than or equal to the corresponding element of b. Result value: r is 1 if any element of a is not less than or equal to the corresponding element of b. Otherwise, r is 0. Endian considerations: None. xvcmpgedp. vec_any_nle mfocrf vec_any_nle rlwinm vec_any_nle cntlzw vec_any_nle srwi vec_any_nle xvcmpgesp. vec_any_nle r a b Example Implementation int vector float vector float xvcmpgesp. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgedp. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Not Less Than r = vec_any_nlt (a, b) Purpose: Tests whether any element of a is not less than the corresponding element of b. Result value: r is 1 if any element of a is not less than the corresponding element of b. Otherwise, r is 0. Endian considerations: None. xvcmpgtdp. vec_any_nlt mfocrf vec_any_nlt rlwinm vec_any_nlt cntlzw vec_any_nlt srwi vec_any_nlt xvcmpgtsp. vec_any_nlt r a b Example Implementation int vector float vector float xvcmpgtdp. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 int vector double vector double xvcmpgtdp. t,b,a mfocrf u,2 rlwinm v,u,25,1 cntlzw w,v srwi r,w,5 Vector Any Numeric r = vec_any_numeric (a) Purpose: Tests whether any element of the source vector is numeric (not a NaN). Result value: r is 1 if any element of a is numeric (not a NaN). Otherwise, r is 0. Endian considerations: None. xvcmpeqdp. vec_any_numeric mfocrf vec_any_numeric rlwinm vec_any_numeric cntlzw vec_any_numeric srwi vec_any_numeric xvcmpeqsp. vec_any_numeric r a Example Implementation int vector float xvcmpeqsp. t,a,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 int vector double xvcmpeqdp. t,a,a mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Any Out of Range r = vec_any_out (a, b) Purpose: Tests whether the value of any element of a vector is outside of a given range. Result value: r is 1 if the value of any element of a is greater than the value of the corresponding element of b or less than the negative of the value of the corresponding element of b. Otherwise, r is 0. Endian considerations: None. vcmpbfp. vec_any_out mfocrf vec_any_out rlwinm vec_any_out cntlzw vec_any_out srwi vec_any_out r a b Example Implementation int vector float vector float vcmpbfp. t,a,b mfocrf u,2 rlwinm v,u,27,1 cntlzw w,v srwi r,w,5 Vector Average r = vec_avg (a, b) Purpose: Returns a vector containing the elementwise average of two vectors. Result value: The value of each element of r is the average of the value of the corresponding elements of a and b. Endian considerations: None. vavgsb vec_avg vavgub vec_avg vavgsh vec_avg vavguh vec_avg vavgsw vec_avg vavguw vec_avg r a b Example Implementation vector signed char vector signed char vector signed char vavgsb r,a,b vector unsigned char vector unsigned char vector unsigned char vavgub r,a,b vector signed short vector signed short vector signed short vavgsh r,a,b vector unsigned short vector unsigned short vector unsigned short vavguh r,a,b vector signed int vector signed int vector signed int vavgsw r,a,b vector unsigned int vector unsigned int vector unsigned int vavguw r,a,b Vector Bit Permute r = vec_bperm (a, b) Purpose: Gathers up to 16 one-bit values from a quadword or from each doubleword element in the specified order, zeroing other bits. Result value: When the type of a is vector unsigned char or vector unsigned __int128: For each i (0 ≤ i < 16), let bit index j denote the byte value of the ith element of b. If bit index j is greater than or equal to 128, bit i of r is set to 0. If bit index j is smaller than 128, bit i of r is set to the value of the jth bit of a. All other bits of r are zeroed. When the type of a is vector unsigned long long: For each doubleword element i (0 ≤ i < 2) of a: For each j (0 ≤ j < 8), let bit index k denote the byte value of the jth element of b. If bit index k is greater than or equal to 64, bit j of element i of r is set to 0. If bit index k is less than 64, bit j of element i of r is set to the value of the kth bit of element i of input a. All other bits are zeroed. Endian considerations: All bit and byte numberings within each element in the above description denote big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_bperm does not follow the bi-endian programming model. vbpermq vec_bperm vbpermd vec_bperm r a b Example Implementation Restrictions vector unsigned char vector unsigned char vector unsigned char vbpermq r,a,b vector unsigned long long vector unsigned __int128 vector unsigned char vbpermq r,a,b vector unsigned long long vector unsigned long long vector unsigned char vbpermd r,a,b ISA 3.0 or later Vector Ceiling r = vec_ceil (a) Purpose: Returns a vector r that contains the result of applying the floating-point ceiling function to each element of a. Result value: The value of each element of r is the smallest representable floating-point integral value greater than or equal to the value of the corresponding element of a. Endian considerations: None. xvrspip vec_ceil xvrdpip vec_ceil r a Example Implementation vector float vector float xvrspip r,a vector double vector double xvrdpip r,a Vector AES Cipher Big-Endian r = vec_cipher_be (a, b) Purpose: Performs one round of the AES cipher operation on an intermediate state array a by using a given round key b. Result value: r contains the resulting intermediate state, after one round of the AES cipher operation on intermediate state array a, using the round key specified by b. Endian considerations: All element and bit numberings of the AES cipher operation use big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_cipher_be does not follow the bi-endian programming model. vcipher vec_cipher_be r a b Example Implementation vector unsigned char vector unsigned char vector unsigned char vcipher r,a,b Vector AES Cipher Last Big-Endian r = vec_cipherlast_be (a, b) Purpose: Performs the final round of the AES cipher operation on an intermediate state array a using the specified round key b. Result value: r contains the resulting final state, after the final round of the AES cipher operation on intermediate state array a, using the round key specified by b. Endian considerations: All element and bit numberings of the AES cipher-last operation use big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_cipherlast_be does not follow the bi-endian programming model. vcipherlast vec_cipherlast_be r a b Example Implementation vector unsigned char vector unsigned char vector unsigned char vcipherlast r,a,b Vector Compare Bytes r = vec_cmpb (a, b) Purpose: Performs a bounds comparison of each set of corresponding elements of two vectors. Result value: Each element of r has the value 0 if the value of the corresponding element of a is less than or equal to the value of the corresponding element of b and greater than or equal to the negated value of the corresponding element of b. Otherwise: If an element of b is greater than or equal to 0, then the value of the corresponding element of r is 0 if the absolute value of the corresponding element of a is equal to the value of the corresponding element of b. The value is negative if it is greater than the value of the corresponding element of b. It is positive if it is less than the value of the corresponding element of b. If an element of b is less than 0, then the value of the element of r is positive if the value of the corresponding element of a is less than or equal to the value of the element of b. Otherwise, it is negative. Endian considerations: None. vcmpbfp vec_cmpb r a b Example Implementation vector signed int vector float vector float vcmpbfp r,a,b Vector Compare Equal r = vec_cmpeq (a, b) Purpose: Returns a vector containing the results of comparing each set of corresponding elements of two vectors for equality. Result value: For each element of r, the value of each bit is 1 if the corresponding elements of a and b are equal. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpequb vec_cmpeq vcmpequh vec_cmpeq vcmpequw vec_cmpeq vcmpequd vec_cmpeq xvcmpeqsp vec_cmpeq xvcmpeqdp vec_cmpeq r a b Example Implementation vector bool char vector bool char vector bool char vcmpequb r,a,b vector bool char vector signed char vector signed char vcmpequb r,a,b vector bool char vector unsigned char vector unsigned char vcmpequb r,a,b vector bool short vector bool short vector bool short vcmpequh r,a,b vector bool short vector signed short vector signed short vcmpequh r,a,b vector bool short vector unsigned short vector unsigned short vcmpequh r,a,b vector bool int vector bool int vector bool int vcmpequw r,a,b vector bool int vector signed int vector signed int vcmpequw r,a,b vector bool int vector unsigned int vector unsigned int vcmpequw r,a,b vector bool long long vector bool long long vector bool long long vcmpequd r,a,b vector bool long long vector signed long long vector signed long long vcmpequd r,a,b vector bool long long vector unsigned long long vector unsigned long long vcmpequd r,a,b vector bool int vector float vector float xvcmpeqsp r,a,b vector bool long long vector double vector double xvcmpeqdp r,a,b Vector Compare Greater or Equal r = vec_cmpge (a, b) Purpose: Returns a vector containing the results of a greater-than-or-equal-to comparison between each set of corresponding elements of two vectors. Result value: For each element of r, the value of each bit is 1 if the corresponding element of a is greater than or equal to the corresponding element of b. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpgtsb vec_cmpge xxlnor vec_cmpge vcmpgtub vec_cmpge vcmpgtsh vec_cmpge vcmpgtuh vec_cmpge vcmpgtsw vec_cmpge vcmpgtuw vec_cmpge vcmpgtsd vec_cmpge vcmpgtud vec_cmpge xvcmpgesp vec_cmpge xvcmpgedp vec_cmpge r a b Example Implementation vector bool char vector signed char vector signed char vcmpgtsb t,b,a xxlnor r,t,t vector bool char vector unsigned char vector unsigned char vcmpgtub t,b,a xxlnor r,t,t vector bool short vector signed short vector signed short vcmpgtsh t,b,a xxlnor r,t,t vector bool short vector unsigned short vector unsigned short vcmpgtuh t,b,a xxlnor r,t,t vector bool int vector signed int vector signed int vcmpgtsw t,b,a xxlnor r,t,t vector bool int vector unsigned int vector unsigned int vcmpgtuw t,b,a xxlnor r,t,t vector bool long long vector signed long long vector signed long long vcmpgtsd t,b,a xxlnor r,t,t vector bool long long vector unsigned long long vector unsigned long long vcmpgtud t,b,a xxlnor r,t,t vector bool int vector float vector float xvcmpgesp r,a,b vector bool long long vector double vector double xvcmpgedp r,a,b Vector Compare Greater Than r = vec_cmpgt (a, b) Purpose: Returns a vector containing the results of a greater-than comparison between each set of corresponding elements of two vectors. Result value: For each element of r, the value of each bit is 1 if the corresponding element of a is greater than the corresponding element of b. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpgtsb vec_cmpgt vcmpgtub vec_cmpgt vcmpgtsh vec_cmpgt vcmpgtuh vec_cmpgt vcmpgtsw vec_cmpgt vcmpgtuw vec_cmpgt vcmpgtsd vec_cmpgt vcmpgtud vec_cmpgt xvcmpgtsp vec_cmpgt xvcmpgtdp vec_cmpgt r a b Example Implementation vector bool char vector signed char vector signed char vcmpgtsb r,a,b vector bool char vector unsigned char vector unsigned char vcmpgtub r,a,b vector bool short vector signed short vector signed short vcmpgtsh r,a,b vector bool short vector unsigned short vector unsigned short vcmpgtuh r,a,b vector bool int vector signed int vector signed int vcmpgtsw r,a,b vector bool int vector unsigned int vector unsigned int vcmpgtuw r,a,b vector bool long long vector signed long long vector signed long long vcmpgtsd r,a,b vector bool long long vector unsigned long long vector unsigned long long vcmpgtud r,a,b vector bool int vector float vector float xvcmpgtsp r,a,b vector bool long long vector double vector double xvcmpgtdp r,a,b Vector Compare Less Than or Equal r = vec_cmple (a, b) Purpose: Returns a vector containing the results of a less-than-or-equal comparison between each set of corresponding elements of two vectors. Result value: For each element of r, the value of each bit is 1 if the corresponding element of a is less than or equal to the corresponding element of b. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpgtsb vec_cmple xxlnor vec_cmple vcmpgtub vec_cmple vcmpgtsh vec_cmple vcmpgtuh vec_cmple vcmpgtsw vec_cmple vcmpgtuw vec_cmple vcmpgtsd vec_cmple vcmpgtud vec_cmple xvcmpgesp vec_cmple xvcmpgedp vec_cmple r a b Example Implementation vector bool char vector signed char vector signed char vcmpgtsb t,a,b xxlnor r,t,t vector bool char vector unsigned char vector unsigned char vcmpgtub t,a,b xxlnor r,t,t vector bool short vector signed short vector signed short vcmpgtsh t,a,b xxlnor r,t,t vector bool short vector unsigned short vector unsigned short vcmpgtuh t,a,b xxlnor r,t,t vector bool int vector signed int vector signed int vcmpgtsw t,a,b xxlnor r,t,t vector bool int vector unsigned int vector unsigned int vcmpgtuw t,a,b xxlnor r,t,t vector bool long long vector signed long long vector signed long long vcmpgtsd t,a,b xxlnor r,t,t vector bool long long vector unsigned long long vector unsigned long long vcmpgtud t,a,b xxlnor r,t,t vector bool int vector float vector float xvcmpgesp r,b,a vector bool long long vector double vector double xvcmpgedp r,b,a Vector Compare Less Than r = vec_cmplt (a, b) Purpose: Returns a vector containing the results of a less-than comparison between each set of corresponding elements of two vectors. Result value: For each element of r, the value of each bit is 1 if the corresponding element of a is less than the corresponding element of b. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpgtsb vec_cmplt vcmpgtub vec_cmplt vcmpgtsh vec_cmplt vcmpgtuh vec_cmplt vcmpgtsw vec_cmplt vcmpgtuw vec_cmplt vcmpgtsd vec_cmplt vcmpgtud vec_cmplt xvcmpgtsp vec_cmplt xvcmpgtdp vec_cmplt r a b Example Implementation vector bool char vector signed char vector signed char vcmpgtsb r,b,a vector bool char vector unsigned char vector unsigned char vcmpgtub r,b,a vector bool short vector signed short vector signed short vcmpgtsh r,b,a vector bool short vector unsigned short vector unsigned short vcmpgtuh r,b,a vector bool int vector signed int vector signed int vcmpgtsw r,b,a vector bool int vector unsigned int vector unsigned int vcmpgtuw r,b,a vector bool long long vector signed long long vector signed long long vcmpgtsd r,b,a vector bool long long vector unsigned long long vector unsigned long long vcmpgtud r,b,a vector bool int vector float vector float xvcmpgtsp r,b,a vector bool long long vector double vector double xvcmpgtdp r,b,a Vector Compare Not Equal r = vec_cmpne (a, b) Purpose: Returns a vector containing the results of comparing each set of corresponding elements of two vectors for inequality. Result value: For each element of r, the value of each bit is 1 if the corresponding elements of a and b are not equal. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpneb vec_cmpne vcmpneh vec_cmpne vcmpnew vec_cmpne vcmpequd vec_cmpne xxlnor vec_cmpne xvcmpeqsp vec_cmpne xvcmpeqdp vec_cmpne r a b Example Implementation vector bool char vector bool char vector bool char vcmpneb r,a,b vector bool char vector signed char vector signed char vcmpneb r,a,b vector bool char vector unsigned char vector unsigned char vcmpneb r,a,b vector bool short vector bool short vector bool short vcmpneh r,a,b vector bool short vector signed short vector signed short vcmpneh r,a,b vector bool short vector unsigned short vector unsigned short vcmpneh r,a,b vector bool int vector bool int vector bool int vcmpnew r,a,b vector bool int vector signed int vector signed int vcmpnew r,a,b vector bool int vector unsigned int vector unsigned int vcmpnew r,a,b vector bool long long vector bool long long vector bool long long vcmpequd t,a,b xxlnor r,t,t vector bool long long vector signed long long vector signed long long vcmpequd t,a,b xxlnor r,t,t vector bool long long vector unsigned long long vector unsigned long long vcmpequd t,a,b xxlnor r,t,t vector bool int vector float vector float xvcmpeqsp t,a,b xxlnor r,t,t vector bool long long vector double vector double xvcmpeqdp t,a,b xxlnor r,t,t Vector Compare Not Equal or Zero r = vec_cmpnez (a, b) Purpose: Returns a vector containing the results of comparing each set of corresponding elements of two vectors for inequality, or for an element with a zero value. Result value: For each element of r, the value of each bit is 1 if the corresponding elements of a and b are not equal, or if the a element or the b element is zero. Otherwise, the value of each bit is 0. Endian considerations: None. vcmpnezb vec_cmpnez vcmpnezh vec_cmpnez vcmpnezw vec_cmpnez r a b Example Implementation Restrictions vector bool char vector signed char vector signed char vcmpnezb r,a,b ISA 3.0 or later vector bool char vector unsigned char vector unsigned char vcmpnezb r,a,b ISA 3.0 or later vector bool short vector signed short vector signed short vcmpnezh r,a,b ISA 3.0 or later vector bool short vector unsigned short vector unsigned short vcmpnezh r,a,b ISA 3.0 or later vector bool int vector signed int vector signed int vcmpnezw r,a,b ISA 3.0 or later vector bool int vector unsigned int vector unsigned int vcmpnezw r,a,b ISA 3.0 or later Vector Count Leading Zeros r = vec_cntlz (a) Purpose: Returns a vector containing the number of most-significant bits equal to zero of each corresponding element of the source vector. Result value: The value of each element of r is set to the number of leading zeros of the corresponding element of a. Endian considerations: None. vclzb vec_cntlz vclzh vec_cntlz vclzw vec_cntlz vclzd vec_cntlz r a Example Implementation Restrictions vector signed char vector signed char vclzb r,a vector unsigned char vector unsigned char vclzb r,a vector signed short vector signed short vclzh r,a vector unsigned short vector unsigned short vclzh r,a vector signed int vector signed int vclzw r,a vector unsigned int vector unsigned int vclzw r,a vector signed long long vector signed long long vclzd r,a vector unsigned long long vector unsigned int long long vclzd r,a Vector Count Leading Zero Least-Significant Bits by Byte r = vec_cntlz_lsbb (a) Purpose: Returns the number of leading byte elements (starting at the lowest-numbered element) of a vector that have a least-significant bit of zero. Result value: The value of r is set to the number of leading byte elements (starting at the lowest-numbered element) of a that have a least-significant bit of zero. Endian considerations: None. vclzlsbb vec_cntlz_lsbb r a Example Implementation Restrictions signed int vector signed char vclzlsbb r,a ISA 3.0 or later signed int vector unsigned char vclzlsbb r,a ISA 3.0 or later Vector Count Trailing Zeros r = vec_cnttz (a) Purpose: Returns a vector containing the number of least-significant bits equal to zero of each corresponding element of the source vector. Result value: The value of each element of r is set to the number of trailing zeros of the corresponding element of a. Endian considerations: None. vctzb vec_cnttz vctzh vec_cnttz vctzw vec_cnttz vctzd vec_cnttz r a Example Implementation Restrictions vector signed char vector signed char vctzb r,a ISA 3.0 or later vector unsigned char vector unsigned char vctzb r,a ISA 3.0 or later vector signed short vector signed short vctzh r,a ISA 3.0 or later vector unsigned short vector unsigned short vctzh r,a ISA 3.0 or later vector signed int vector signed int vctzw r,a ISA 3.0 or later vector unsigned int vector unsigned int vctzw r,a ISA 3.0 or later vector signed long long vector signed long long vctzd r,a ISA 3.0 or later vector unsigned long long vector unsigned int long long vctzd r,a ISA 3.0 or later Vector Count Trailing Zero Least-Significant Bits by Byte r = vec_cnttz_lsbb (a) Purpose: Returns the number of trailing byte elements (starting at the highest-numbered element) of a vector that have a least-significant bit of zero. Result value: The value of r is set to the number of trailing byte elements (starting at the highest-numbered element) of a that have a least-significant bit of zero. Endian considerations: None. vctzlsbb vec_cnttz_lsbb r a Example Implementation Restrictions signed int vector signed char vctzlsbb r,a ISA 3.0 or later signed int vector unsigned char vctzlsbb r,a ISA 3.0 or later Vector Copy Sign r = vec_cpsgn (a, b) Purpose: Returns a vector by copying the sign of the elements in one vector to the sign of the corresponding elements of another vector. Result value: The value of each element of r is set to the corresponding element of b with its sign replaced by the sign from the corresponding element of a. Endian considerations: None. xvcpsgnsp vec_cpsgn xvcpsgndp vec_cpsgn r a b Example Implementation Restrictions vector float vector float vector float xvcpsgnsp r,b,a vector double vector double vector double xvcpsgndp r,b,a Vector Convert to Floating-Point r = vec_ctf (a, b) Purpose: Converts an integer vector into a floating-point vector. Result value: The value of each element of r is the closest floating-point approximation of the value of the corresponding element of a divided by 2 to the power of b, which must be in the range 0–31. Endian considerations: None. Notes: The example implementations below assume b is zero, so that the scaling code is omitted. Scaling is accomplished by multiplying each element of r by 2 to the power of –b. vcfsx vec_ctf vcfux vec_ctf r a b Example Implementation vector float vector signed int 5-bit unsigned literal vcfsx r,a,b vector float vector unsigned int 5-bit unsigned literal vcfux r,a,b vector double vector signed long long 5-bit unsigned literal xvcvsxddp r,a,b vector double vector unsigned long long 5-bit unsigned literal xvcvuxddp r,a,b Vector Convert to Signed Integer r = vec_cts (a, b) Purpose: Converts a floating-point vector into a signed integer vector. Result value: The value of each element of r is the saturated signed-integer value, truncated towards zero, obtained by multiplying the corresponding element of a multiplied by 2 to the power of b, which must be in the range 0–31. Endian considerations: None. vctsxs vec_cts r a b Example Implementation vector signed int vector float 5-bit unsigned literal vctsxs r,a,b Vector Convert to Unsigned Integer r = vec_ctu (a, b) Purpose: Converts a floating-point vector into an unsigned integer vector. Result value: The value of each element of r is the saturated unsigned-integer value, truncated towards zero, obtained by multiplying the corresponding element of a multiplied by 2 to the power of b, which must be in the range 0–31. Endian considerations: None. vctuxs vec_ctu r a b Example Implementation vector unsigned int vector float 5-bit unsigned literal vctuxs r,a,b Vector Divide r = vec_div (a, b) Purpose: Divides the elements in one vector by the corresponding elements in another vector and places the quotients in the result vector. Result value: The value of each element of r is obtained by dividing the corresponding element of a by the corresponding element of b. Endian considerations: None. xxspltd vec_div mfvsrd vec_div divd vec_div mtvsrd vec_div xxmrghd vec_div xvdivsp vec_div xvdivdp vec_div r a b Example Implementation vector signed long long vector signed long long vector signed long long xxspltd t,a,1 mfvsrd u,t xxspltd v,b,1 mfvsrd w,v divd x,u,w mfvsrd u,a mtvsrd y,x mfvsrd w,b divd x,u,w mtvsrd z,x xxmrghd r,z,y vector unsigned long long vector unsigned long long vector unsigned long long xxspltd t,a,1 mfvsrd u,t xxspltd v,b,1 mfvsrd w,v divd x,u,w mfvsrd u,a mtvsrd y,x mfvsrd w,b divd x,u,w mtvsrd z,x xxmrghd r,z,y vector float vector float vector float xvdivsp r,a,b vector double vector double vector double xvdivdp r,a,b Vector Convert to Double Precision r = vec_double (a) Purpose: Converts a vector of long integers into a vector of double-precision numbers. Result value: The value of each element of r is obtained by converting the corresponding element of a to double precision floating-point. Endian considerations: None. xvcvsxddp vec_double xvcvuxddp vec_double r a Example Implementation vector double vector signed long long xvcvsxddp r,a vector double vector unsigned long long xvcvuxddp r,a Vector Convert Even Elements to Double Precision r = vec_doublee (a) Purpose: Converts the even elements of a vector into a vector of double-precision numbers. Result value: Elements 0 and 1 of r are set to the converted values of elements 0 and 2 of a. Endian considerations: Differences in element numbering require different implementations for big- and little-endian code generation. xxsldwi vec_doublee xvcvsxwdp vec_doublee xvcvuxwdp vec_doublee xvcvspdp vec_doublee r a Example LE Implementation Example BE Implementation Restrictions vector double vector signed int xxsldwi t,a,a,1 xvcvsxwdp r,t xvcvsxwdp r,a vector double vector unsigned int xxsldwi t,a,a,1 xvcvuxwdp r,t xvcvuxwdp r,a vector double vector float xxsldwi t,a,a,1 xvcvspdp r,t xvcvspdp r,a Vector Convert High Elements to Double Precision r = vec_doubleh (a) Purpose: Converts the high-order elements of a vector into a vector of double-precision numbers. Result value: Elements 0 and 1 of r are set to the converted values of elements 0 and 1 of a. Endian considerations: Differences in element numbering require different implementations for big- and little-endian code generation. xxsldwi vec_doubleh xvcvsxwdp vec_doubleh xvcvuxwdp vec_doubleh xvcvspdp vec_doubleh r a Example LE Implementation Example BE Implementation Restrictions vector double vector signed int xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvsxwdp r,u xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvsxwdp r,u vector double vector unsigned int xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvuxwdp r,u xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvuxwdp r,u vector double vector float xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvspdp r,u xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvspdp r,u Vector Convert Low Elements to Double Precision r = vec_doublel (a) Purpose: Converts the low-order elements of a vector into a vector of double-precision numbers. Result value: Elements 0 and 1 of r are set to the converted values of elements 2 and 3 of a. Endian considerations: Differences in element numbering require different implementations for big- and little-endian code generation. xxsldwi vec_doublel xvcvsxwdp vec_doublel xvcvuxwdp vec_doublel xvcvspdp vec_doublel r a Example LE Implementation Example BE Implementation Restrictions vector double vector signed int xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvsxwdp r,u xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvsxwdp r,u vector double vector unsigned int xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvuxwdp r,u xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvuxwdp r,u vector double vector float xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvspdp r,u xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvspdp r,u Vector Convert Odd Elements to Double Precision r = vec_doubleo (a) Purpose: Converts the odd elements of a vector into a vector of double-precision numbers. Result value: Elements 0 and 1 of r are set to the converted values of elements 1 and 3 of a. Endian considerations: Differences in element numbering require different implementations for big- and little-endian code generation. xvcvsxwdp vec_doubleo xxsldwi vec_doubleo xvcvuxwdp vec_doubleo xvcvspdp vec_doubleo r a Example LE Implementation Example BE Implementation Restrictions vector double vector signed int xvcvsxwdp r,a xxsldwi t,a,a,1 xvcvsxwdp r,t vector double vector unsigned int xvcvuxwdp r,a xxsldwi t,a,a,1 xvcvuxwdp r,t vector double vector float xvcvspdp r,a xxsldwi t,a,a,1 xvcvspdp r,t Vector Equivalence r = vec_eqv (a, b) Purpose: Performs a bitwise equivalence (exclusive NOR) of two vectors. Result value: The value of r is the bitwise XNOR of a and b. Endian considerations: None. xxleqv vec_eqv r a b Example Implementation vector bool char vector bool char vector bool char xxleqv r,a,b vector signed char vector signed char vector signed char xxleqv r,a,b vector unsigned char vector unsigned char vector unsigned char xxleqv r,a,b vector bool short vector bool short vector bool short xxleqv r,a,b vector signed short vector signed short vector signed short xxleqv r,a,b vector unsigned short vector unsigned short vector unsigned short xxleqv r,a,b vector signed int vector signed int vector signed int xxleqv r,a,b vector bool int vector bool int vector bool int xxleqv r,a,b vector unsigned int vector unsigned int vector unsigned int xxleqv r,a,b vector bool long long vector bool long long vector bool long long xxleqv r,a,b vector signed long long vector signed long long vector signed long long xxleqv r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxleqv r,a,b vector float vector float vector float xxleqv r,a,b vector double vector double vector double xxleqv r,a,b Vector Exponential Estimate r = vec_expte (a) Purpose: Returns a vector r containing estimates of 2 raised to the power of the corresponding elements of a. Result value: The value of each element of r is the estimated value of 2 raised to the power of the corresponding element of a. Endian considerations: None. vexptefp vec_expte r a Example Implementation vector float vector float vexptefp r,a Vector Extract r = vec_extract (a, b) Purpose: Returns the value of the bth element of vector a. Result value: The value of each element of r is the element of a at position b modulo the number of elements of a. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. Notes: Prior to ISA 3.0, less efficient code sequences must be used to implement vec_extract. vextubrx vec_extract extsb vec_extract vextublx vec_extract slwi vec_extract vextuwrx vec_extract extsw vec_extract vextuwlx vec_extract xori vec_extract rldic vec_extract mtvsrdd vec_extract vslo vec_extract mfvsrd vec_extract vextuhrx vec_extract extsh vec_extract vextuhlx vec_extract rldicl vec_extract subfic vec_extract sldi vec_extract xscvspdp vec_extract r a b Example ISA 3.0 LE Implementation Example ISA 3.0 BE Implementation signed char vector signed char signed int vextubrx t,b,a extsb r,t vextublx t,b,a extsb r,t unsigned char vector bool char signed int vextubrx t,b,a vextublx t,b,a unsigned char vector unsigned char signed int vextubrx t,b,a vextublx t,b,a signed short vector signed short signed int slwi t,b,1 vextuhrx u,t,a extsh r,u slwi t,b,1 vextuhlx u,t,a extsh r,u unsigned short vector bool short signed int slwi t,b,1 vextuhrx r,t,a slwi t,b,1 vextuhlx r,t,a unsigned short vector unsigned short signed int slwi t,b,1 vextuhrx r,t,a slwi t,b,1 vextuhlx r,t,a signed int vector signed int signed int slwi t,b,2 vextuwrx u,t,a extsw r,u slwi t,b,2 vextuwlx u,t,a extsw r,u unsigned int vector bool int signed int slwi t,b,2 vextuwrx r,t,a slwi t,b,2 vextuwlx r,t,a unsigned int vector unsigned int signed int slwi t,b,2 vextuwrx r,t,a slwi t,b,2 vextuwlx r,t,a signed long long vector signed long long signed int xori t,b,0x1 rldic u,t,6,57 mtvsrdd v,u,u vslo w,a,v mfvsrd r,w rldic t,b,6,57 mtvsrdd u,t,t vslo v,a,u mfvsrd r,v unsigned long long vector bool long long signed int xori t,b,0x1 rldic u,t,6,57 mtvsrdd v,u,u vslo w,a,v mfvsrd r,w rldic t,b,6,57 mtvsrdd u,t,t vslo v,a,u mfvsrd r,v unsigned long long vector unsigned long long signed int xori t,b,0x1 rldic u,t,6,57 mtvsrdd v,u,u vslo w,a,v mfvsrd r,w rldic t,b,6,57 mtvsrdd u,t,t vslo v,a,u mfvsrd r,v float vector float signed int rldicl t,b,0,62 subfic u,t,3 sldi v,u,5 mtvsrdd w,v,v vslo x,a,w xscvspdp r,x sldi t,b,5 mtvsrdd u,t,t vslo v,a,u xscvspdp r,v double vector double signed int xori t,b,0x1 rldic u,t,6,57 mtvsrdd v,u,u vslo r,a,v rldic t,b,6,57 mtvsrdd u,t,t vslo r,a,u Vector Extract Exponent r = vec_extract_exp (a) Purpose: Extracts exponents from a vector of floating-point numbers. Result value: Each element of r is extracted from the exponent field of the corresponding floating-point vector element of a. The extracted exponents of a are returned as right-justified unsigned integers containing biased exponents, in accordance with the exponent representation specified by IEEE 754, without further processing. Endian considerations: None. xvxexpdp vec_extract_exp xvxexpsp vec_extract_exp r a Example Implementation Restrictions vector unsigned int vector float xvxexpsp r,a ISA 3.0 or later vector unsigned long long vector double xvxexpdp r,a ISA 3.0 or later Vector Extract Floats from High Elements of Vector Short Int r = vec_extract_fp32_from_shorth (a) Purpose: Extracts four single-precision floating-point numbers from the high elements of a vector of eight 16-bit elements, interpreting each element as a 16-bit floating-point number in IEEE format. Result value: The first four elements of a are interpreted as 16-bit floating-point numbers in IEEE format, and extended to single-precision format, returning a vector with four single-precision IEEE numbers. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. Notes: The example implementation assumes that the vperm instruction is used for big-endian, and the vpermr instruction is used for little-endian. The permute control vector for the vperm or vpermr instruction is in a memory location identified by pcv. The value located at pcv is identical in natural element order for big- and little-endian: { 15, 14, 0, 0, 13, 12, 0, 0, 11, 10, 0, 0, 9, 8, 0, 0 }. lxv vec_extract_fp32_from_shorth vperm vec_extract_fp32_from_shorth vpermr vec_extract_fp32_from_shorth xvcvhpsp vec_extract_fp32_from_shorth r a Example Implementation Restrictions vector float vector unsigned short lxv t,0(pcv) vperm[r] u,a,a,t xvcvhpsp r,u ISA 3.0 or later Vector Extract Floats from Low Elements of Vector Short Int r = vec_extract_fp32_from_shortl (a) Purpose: Extracts four single-precision floating-point numbers from the low elements of a vector of eight 16-bit elements, interpreting each element as a 16-bit floating-point number in IEEE format. Result value: The last four elements of a are interpreted as 16-bit floating-point numbers in IEEE format, and extended to single-precision format, returning a vector with four single-precision IEEE numbers. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. Notes: The example implementation assumes that the vperm instruction is used for big-endian, and the vpermr instruction is used for little-endian. The permute control vector for the vperm or vpermr instruction is in a memory location identified by pcv. The value located at pcv is identical in natural element order for big- and little-endian: { 7, 6, 0, 0, 5, 4, 0, 0, 3, 2, 0, 0, 1, 0, 0, 0 }. lxv vec_extract_fp32_from_shortl vperm vec_extract_fp32_from_shortl vpermr vec_extract_fp32_from_shortl xvcvhpsp vec_extract_fp32_from_shortl r a Example Implementation Restrictions vector float vector unsigned short lxv t,0(pcv) vperm[r] u,a,a,t xvcvhpsp r,u ISA 3.0 or later Vector Extract Significand r = vec_extract_sig (a) Purpose: Extracts a vector of significands (mantissas) from a vector of floating-point numbers. Result value: Each element of r is extracted from the significand (mantissa) field of the corresponding floating-point element of a. The significand is from the corresponding floating-point number in accordance with the IEEE format. The returned result includes the implicit leading digit. The value of that digit is not encoded in the IEEE format, but is implied by the exponent. Endian considerations: None. xvxsigdp vec_extract_sig xvxsigsp vec_extract_sig r a Example Implementation Restrictions vector unsigned int vector float xvxsigsp r,a ISA 3.0 or later vector unsigned long long vector double xvxsigdp r,a ISA 3.0 or later Vector Extract Four Bytes r = vec_extract4b (a, b) Purpose: Extracts a word from vector a at constant byte position b. Result value: The first doubleword element of r contains the zero-extended extracted word from a. The second doubleword is set to 0. b specifies the least-significant byte number (0–12) of the word to be extracted. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxextractuw vec_extract4b r a b Example LE Implementation Example BE Implementation Restrictions vector unsigned long long vector unsigned char const int (range [0,12]) xxextractuw r,a,12-b xxextractuw r,a,b ISA 3.0 or later Vector Index of First Match r = vec_first_match_index (a, b) Purpose: Performs a comparison of equality on each of the corresponding elements of a and b, and returns the first position of equality. Result value: Returns the element index of the position of the first character match in natural element order. If no match, returns the number of characters as an element count in the vector argument. Endian considerations: None. vcmpnezb vec_first_match_index vcmpnezh vec_first_match_index vcmpnezw vec_first_match_index xxlnor vec_first_match_index vctzlsbb vec_first_match_index vclzlsbb vec_first_match_index rldicl vec_first_match_index r a b Example LE Implementation Example BE Implementation Restrictions unsigned int vector signed char vector signed char vcmpnezb t,a,b xxlnor u,t,t vctzlsbb r,u vcmpnezb t,a,b xxlnor u,t,t vclzlsbb r,u ISA 3.0 or later unsigned int vector unsigned char vector unsigned char vcmpnezb t,a,b xxlnor u,t,t vctzlsbb r,u vcmpnezb t,a,b xxlnor u,t,t vclzlsbb r,u ISA 3.0 or later unsigned int vector signed short vector signed short vcmpnezh t,a,b xxlnor u,t,t vctzlsbb v,u rldicl r,v,63,33 vcmpnezh t,a,b xxlnor u,t,t vclzlsbb v,u rldicl r,v,63,33 ISA 3.0 or later unsigned int vector unsigned short vector unsigned short vcmpnezh t,a,b xxlnor u,t,t vctzlsbb v,u rldicl r,v,63,33 vcmpnezh t,a,b xxlnor u,t,t vclzlsbb v,u rldicl r,v,63,33 ISA 3.0 or later unsigned int vector signed int vector signed int vcmpnezw t,a,b xxlnor u,t,t vctzlsbb v,u rldicl r,v,62,34 vcmpnezw t,a,b xxlnor u,t,t vclzlsbb v,u rldicl r,v,62,34 ISA 3.0 or later unsigned int vector unsigned int vector unsigned int vcmpnezw t,a,b xxlnor u,t,t vctzlsbb v,u rldicl r,v,62,34 vcmpnezw t,a,b xxlnor u,t,t vclzlsbb v,u rldicl r,v,62,34 ISA 3.0 or later Vector Index of First Match or End of String r = vec_first_match_or_eos_index (a, b) Purpose: Performs a comparison of equality on each of the corresponding elements of a and b. Returns the first position of equality, or the zero string terminator. Result value: Returns the element index of the position, in natural element order, of either the first character match or an end-of-string (EOS) terminator. If no match or terminator, returns the number of characters as an element count in the vector argument. Endian considerations: None. xxspltib vec_first_match_or_eos_index vcmpneb vec_first_match_or_eos_index vcmpnezb vec_first_match_or_eos_index vcmpneh vec_first_match_or_eos_index vcmpnezh vec_first_match_or_eos_index vcmpnew vec_first_match_or_eos_index vcmpnezw vec_first_match_or_eos_index xxland vec_first_match_or_eos_index xxlnand vec_first_match_or_eos_index vctzlsbb vec_first_match_or_eos_index vclzlsbb vec_first_match_or_eos_index rldicl vec_first_match_or_eos_index r a b Example LE Implementation Example BE Implementation Restrictions unsigned int vector signed char vector signed char xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb r,y xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb r,y ISA 3.0 or later unsigned int vector unsigned char vector unsigned char xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb r,y xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb r,y ISA 3.0 or later unsigned int vector signed short vector signed short xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb z,y rldicl r,z,63,33 xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb z,y rldicl r,z,63,33 ISA 3.0 or later unsigned int vector unsigned short vector unsigned short xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb z,y rldicl r,z,63,33 xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb z,y rldicl r,z,63,33 ISA 3.0 or later unsigned int vector signed int vector signed int xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb z,y rldicl r,z,62,34 xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb z,y rldicl r,z,62,34 ISA 3.0 or later unsigned int vector unsigned int vector unsigned int xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlnand y,x,w vctzlsbb z,y rldicl r,z,62,34 xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlnand y,x,w vclzlsbb z,y rldicl r,z,62,34 ISA 3.0 or later Vector Index of First Mismatch r = vec_first_mismatch_index (a, b) Purpose: Performs a comparison of inequality on each of the corresponding elements of a and b, and returns the first position of inequality. Result value: Returns the element index of the position of the first character mismatch in natural element order. If no mismatch, returns the number of characters as an element count in the vector argument. Endian considerations: None. vcmpneb vec_first_mismatch_index vcmpneh vec_first_mismatch_index vcmpnew vec_first_mismatch_index vctzlsbb vec_first_mismatch_index vclzlsbb vec_first_mismatch_index rldicl vec_first_mismatch_index r a b Example LE Implementation Example BE Implementation Restrictions unsigned int vector signed char vector signed char vcmpneb t,a,b vctzlsbb r,t vcmpneb t,a,b vclzlsbb r,t ISA 3.0 or later unsigned int vector unsigned char vector unsigned char vcmpneb t,a,b vctzlsbb r,t vcmpneb t,a,b vclzlsbb r,t ISA 3.0 or later unsigned int vector signed short vector signed short vcmpneh t,a,b vctzlsbb u,t rldicl r,u,63,33 vcmpneh t,a,b vclzlsbb u,t rldicl r,u,63,33 ISA 3.0 or later unsigned int vector unsigned short vector unsigned short vcmpneh t,a,b vctzlsbb u,t rldicl r,u,63,33 vcmpneh t,a,b vclzlsbb u,t rldicl r,u,63,33 ISA 3.0 or later unsigned int vector signed int vector signed int vcmpnew t,a,b vctzlsbb u,t rldicl r,u,62,34 vcmpnew t,a,b vclzlsbb u,t rldicl r,u,62,34 ISA 3.0 or later unsigned int vector unsigned int vector unsigned int vcmpnew t,a,b vctzlsbb u,t rldicl r,u,62,34 vcmpnew t,a,b vclzlsbb u,t rldicl r,u,62,34 ISA 3.0 or later Vector Index of First Mismatch or End of String r = vec_first_mismatch_or_eos_index (a, b) Purpose: Performs a comparison of inequality on each of the corresponding elements of a and b. Returns the first position of inequality, or the zero string terminator. Result value: Returns the element index of the position, in natural element order, of either the first character mismatch or an end-of-string (EOS) terminator. If no mismatch or terminator, returns the number of characters as an element count in the vector argument. Endian considerations: None. xxspltib vec_first_mismatch_or_eos_index vcmpneb vec_first_mismatch_or_eos_index vcmpnezb vec_first_mismatch_or_eos_index vcmpneh vec_first_mismatch_or_eos_index vcmpnezh vec_first_mismatch_or_eos_index vcmpnew vec_first_mismatch_or_eos_index vcmpnezw vec_first_mismatch_or_eos_index xxland vec_first_mismatch_or_eos_index xxlorc vec_first_mismatch_or_eos_index vctzlsbb vec_first_mismatch_or_eos_index vclzlsbb vec_first_mismatch_or_eos_index rldicl vec_first_mismatch_or_eos_index r a b Example LE Implementation Example BE Implementation Restrictions unsigned int vector signed char vector signed char xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb r,y xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb r,y ISA 3.0 or later unsigned int vector unsigned char vector unsigned char xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb r,y xxspltib t,0 vcmpneb u,a,t vcmpneb v,b,t vcmpnezb w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb r,y ISA 3.0 or later unsigned int vector signed short vector signed short xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb z,y rldicl r,z,63,33 xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb z,y rldicl r,z,63,33 ISA 3.0 or later unsigned int vector unsigned short vector unsigned short xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb z,y rldicl r,z,63,33 xxspltib t,0 vcmpneh u,a,t vcmpneh v,b,t vcmpnezh w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb z,y rldicl r,z,63,33 ISA 3.0 or later unsigned int vector signed int vector signed int xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb z,y rldicr r,z,62,34 xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb z,y rldicr r,z,62,34 ISA 3.0 or later unsigned int vector unsigned int vector unsigned int xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlorc y,w,x vctzlsbb z,y rldicr r,z,62,34 xxspltib t,0 vcmpnew u,a,t vcmpnew v,b,t vcmpnezw w,a,b xxland x,u,v xxlorc y,w,x vclzlsbb z,y rldicr r,z,62,34 ISA 3.0 or later Vector Convert Integer to Floating-Point r = vec_float (a) Purpose: Converts a vector of integers to a vector of single-precision floating-point numbers. Result value: Elements of r are obtained by converting the respective elements of a to single-precision floating-point numbers. Endian considerations: None. xvcvsxwsp vec_float xvcvuxwsp vec_float r a Example Implementation vector float vector signed int xvcvsxwsp r,a vector float vector unsigned int xvcvuxwsp r,a Vector Convert Two Vectors to Floating-Point r = vec_float2 (a, b) Purpose: Converts two vectors of long long integers or double-precision floating-point numbers to a vector of single-precision numbers. Result value: Elements of r are obtained by converting the elements of a and b to single-precision numbers. Elements 0 and 1 of r are converted from elements 0 and 1 of a, respectively, and elements 2 and 3 of r are converted from elements 0 and 1 of b, respectively. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxpermdi vec_float2 xvcvsxdsp vec_float2 vmrgow vec_float2 vmrgew vec_float2 r a b Example LE Implementation Example BE Implementation vector float vector signed long long vector signed long long xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgow r,v,w xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgew r,v,w vector float vector unsigned long long vector unsigned long long xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgow r,v,w xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgew r,v,w vector float vector double vector double xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgow r,v,w xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvsxdsp v,t xvcvsxdsp w,u vmrgew r,v,w Vector Convert to Floating-Point in Even Elements r = vec_floate (a) Purpose: Converts the elements of a source vector to single-precision floating-point and stores the results in the even elements of the target vector. Result value: The even-numbered elements of r are obtained by converting the elements of a to single-precision numbers, using the current floating-point rounding mode. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvsxdsp vec_floate vsldoi vec_floate xvcvuxdsp vec_floate xvcvdpsp vec_floate r a Example LE Implementation Example BE Implementation vector float vector signed long long xvcvsxdsp r,a xvcvsxdsp t,a vsldoi r,t,t,4 vector float vector unsigned long long xvcvuxdsp r,a xvcvuxdsp t,a vsldoi r,t,t,4 vector float vector double xvcvdpsp r,a xvcvdpsp t,a vsldoi r,t,t,4 Vector Convert to Floating-Point in Odd Elements r = vec_floato (a) Purpose: Converts the elements of a source vector to single-precision floating-point and stores the results in the odd elements of the target vector. Result value: The odd-numbered elements of r are obtained by converting the elements of a to single-precision numbers, using the current floating-point rounding mode. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvsxdsp vec_floato vsldoi vec_floato xvcvuxdsp vec_floato xvcvdpsp vec_floato r a Example LE Implementation Example BE Implementation vector float vector signed long long xvcvsxdsp t,a vsldoi r,t,t,4 xvcvsxdsp r,a vector float vector unsigned long long xvcvuxdsp t,a vsldoi r,t,t,4 xvcvuxdsp r,a vector float vector double xvcvdpsp t,a vsldoi r,t,t,4 xvcvdpsp r,a Vector Floor r = vec_floor (a) Purpose: Returns a vector containing the largest representable floating-point integral values less than or equal to the values of the corresponding elements of the source vector. Result value: Each element of r contains the largest representable floating-point integral value less than or equal to the value of the corresponding element of a. Endian considerations: None. xvrdpim vec_floor xvrspim vec_floor r a Example Implementation vector float vector float xvrspim r,a vector double vector double xvrdpim r,a Vector Gather Bits by Byte r = vec_gb (a) Purpose: Performs a gather-bits operation on the input. Result value: Within each doubleword, let x(i) (0 ≤ i < 8) denote the byte elements, with x(0) the most-significant byte. For each pair of i and j (0 ≤ i < 8, 0 ≤ j < 8), the jth bit of the ith byte element of r is set to the value of the ith bit of the jth byte element of a. , taken from the Power ISA, shows how bits are combined by the vec_gb intrinsic. Here VR[VRT] is equivalent to r, and VR[VRB] is equivalent to a.

Endian considerations: The vec_gb intrinsic function assumes big-endian (left-to-right) numbering for both bits and bytes, matching the ISA 2.07 vgbbd instruction. vgbbd vec_gb r a Example Implementation vector unsigned char vector unsigned char vgbbd r,a Vector Insert r = vec_insert (a, b, c) Purpose: Returns a copy of vector b with element c replaced by the value of a. Result value: r contains a copy of vector b with element c replaced by the value of a. This function uses modular arithmetic on c to determine the element number. For example, if c is out of range, the compiler uses c modulo the number of elements in the vector to determine the element position. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. Notes: The sample implementations are given for ISA 3.0 when c is a constant. For earlier target architectures, or when c is variable, less efficient sequences are required. The sample implementations also assume that c is in range; that is, any required modulus operations have already been performed on the constant index. mtvsrwz vec_insert vinsertb vec_insert xxinsertw vec_insert mtvsrd vec_insert xxpermdi vec_insert vinserth vec_insert xscvdpspn vec_insert xxextractuw vec_insert r a b c Example ISA 3.0 LE Implementation Example ISA 3.0 BE Implementation vector signed char signed char vector signed char signed int mtvsrwz t,b vinsertb r,t,15-c mtvsrwz t,b vinsertb r,t,c vector unsigned char unsigned char vector unsigned char signed int mtvsrwz t,b vinsertb r,t,15-c mtvsrwz t,b vinsertb r,t,c vector signed short signed short vector signed short signed int mtvsrwz t,b vinserth r,t,a,(7-c)*2 mtvsrd t,b vinserth r,t,a,c*2 vector unsigned short unsigned short vector unsigned short signed int mtvsrwz t,b vinserth r,t,a,(7-c)*2 mtvsrd t,b vinserth r,t,a,c*2 vector signed int signed int vector signed int signed int mtvsrwz t,b xxinsertw r,t,(3-c)*4 mtvsrwz t,b vinsertb r,t,c*4 vector unsigned int unsigned int vector unsigned int signed int mtvsrwz t,b xxinsertw r,t,(3-c)*4 mtvsrwz t,b vinsertb r,t,c*4 vector signed long long signed long long vector signed long long signed int mtvsrd t,b xxpermdi r,t,a,c mtvsrd t,b xxpermdi r,t,a,1-c vector unsigned long long unsigned long long vector unsigned long long signed int mtvsrd t,b xxpermdi r,t,a,c mtvsrd t,b xxpermdi r,t,a,1-c vector float float vector float signed int xscvdpspn t,a xxextractuw u,t,0 xxinsertw r/b,u,(3-c)*4 xscvdpspn t,a xxextractuw u,t,0 xxinsertw r/b,u,c*4 vector double double vector double signed int xxpermdi r,b,a,1 [c=0] [or] xxpermdi r,a,b,1 [c=1] xxpermdi r,a,b,1 [c=0] [or] xxpermdi r,b,a,1 [c=1] Vector Insert Exponent r = vec_insert_exp (a, b) Purpose: Inserts exponents into a vector of floating-point numbers. Result value: Each element of r is generated by combining the exponent specified by the corresponding element of b with the sign and significand of the corresponding element of a. The inserted exponent of b is treated as a right-justified unsigned integer containing a biased exponent, in accordance with the exponent representation specified by IEEE 754. It is combined with the sign and significand of a without further processing. Endian considerations: None. xviexpdp vec_insert_exp xviexpsp vec_insert_exp r a b Example Implementation Restrictions vector float vector unsigned int vector unsigned int xviexpsp r,a,b ISA 3.0 or later vector float vector float vector unsigned int xviexpsp r,a,b ISA 3.0 or later vector double vector unsigned long long vector unsigned long long xviexpdp r,a,b ISA 3.0 or later vector double vector double vector unsigned long long xviexpdp r,a,b ISA 3.0 or later Vector Insert Four Bytes r = vec_insert4b (a, b, c) Purpose: Inserts a word into a vector at a byte position. Result value: Let W be the first doubleword element of a, truncated to 32 bits. The result vector r is formed by inserting W into b at the byte position (0–12) specified by c. Endian considerations: The element and byte numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxpermdi vec_insert4b xxinsertw vec_insert4b r a b c Example LE Implementation Example BE Implementation Restrictions vector unsigned char vector signed int vector unsigned char const int (range [0,12]) xxpermdi t,a,a,1 xxinsertw b,t,12-c xxinsertw b,t,c ISA 3.0 or later vector unsigned char vector unsigned int vector unsigned char const int (range [0,12]) xxpermdi t,a,a,1 xxinsertw b,t,12-c xxinsertw b,t,c ISA 3.0 or later Vector Load Indexed r = vec_ld (a, b) Purpose: Loads a 16-byte vector from the memory address specified by the displacement and the pointer, ignoring the four low-order bits of the calculated address. Result value: The value of r is obtained by adding a and b, masking off the four low-order bits of the result, and loading the 16-byte vector from the resultant memory address. Endian considerations: None. lvx vec_ld r a b Example ISA 3.0 Implementation vector bool char signed long long vector bool char * lvx r,b,a vector signed char signed long long signed char * lvx r,b,a vector signed char signed long long vector signed char * lvx r,b,a vector unsigned char signed long long unsigned char * lvx r,b,a vector unsigned char signed long long vector unsigned char * lvx r,b,a vector bool short signed long long vector bool short * lvx r,b,a vector signed short signed long long signed short * lvx r,b,a vector signed short signed long long vector signed short * lvx r,b,a vector unsigned short signed long long unsigned short * lvx r,b,a vector unsigned short signed long long vector unsigned short * lvx r,b,a vector pixel signed long long vector pixel * lvx r,b,a vector bool int signed long long vector bool int * lvx r,b,a vector signed int signed long long signed int * lvx r,b,a vector signed int signed long long vector signed int * lvx r,b,a vector unsigned int signed long long unsigned int * lvx r,b,a vector unsigned int signed long long vector unsigned int * lvx r,b,a vector bool long long signed long long vector bool long long * lvx r,b,a vector signed long long signed long long signed long long * lvx r,b,a vector signed long long signed long long vector signed long long * lvx r,b,a vector unsigned long long signed long long unsigned long long * lvx r,b,a vector unsigned long long signed long long vector unsigned long long * lvx r,b,a vector signed __int128 signed long long signed __int128 * lvx r,b,a vector signed __int128 signed long long vector signed __int128 * lvx r,b,a vector unsigned __int128 signed long long unsigned __int128 * lvx r,b,a vector unsigned __int128 signed long long vector unsigned __int128 * lvx r,b,a vector float signed long long float * lvx r,b,a vector float signed long long vector float * lvx r,b,a vector double signed long long double * lvx r,b,a vector double signed long long vector double * lvx r,b,a Vector Load Element Indexed r = vec_lde (a, b) Purpose: Loads a single element into the position in the vector register corresponding to its address, leaving the remaining elements of the register undefined. Result value: The integer value a is added to the pointer value b. The resulting address is rounded down to the nearest address that is a multiple of es, where es is 1 for char pointers, 2 for short pointers, and 4 for float or int pointers. The element at this address is loaded into an element of r, leaving all other elements of r undefined. The position of the loaded element in r is determined by taking the address modulo 16. Endian considerations: None. Notes: Be careful to note that the address (b+c) is aligned to an element boundary. Do not attempt to load unaligned data with this intrinsic. lvebx vec_lde lvewx vec_lde lvehx vec_lde r a b Example ISA 3.0 Implementation vector signed char signed long long signed char * lvebx r,b,a vector unsigned char signed long long unsigned char * lvebx r,b,a vector signed short signed long long signed short * lvehx r,b,a vector unsigned short signed long long unsigned short * lvehx r,b,a vector signed int signed long long signed int * lvewx r,b,a vector unsigned int signed long long unsigned int * lvewx r,b,a vector float signed long long float * lvewx r,b,a Vector Load Indexed Least Recently Used r = vec_ldl (a, b) Purpose: Loads a 16-byte vector from the memory address specified by the displacement and the pointer, ignoring the four low-order bits of the calculated address, and marks the cache line loaded from as least recently used. Result value: The value of r is obtained by adding a and b, masking off the four low-order bits of the result, and loading the 16-byte vector from the resultant memory address. Endian considerations: None. Notes: This intrinsic can be used to indicate the last access to a portion of memory, as a hint to the data cache controller that the associated cache line can be replaced without performance loss. lvxl vec_ldl r a b Example ISA 3.0 Implementation vector bool char signed long long vector bool char * lvxl r,b,a vector signed char signed long long signed char * lvxl r,b,a vector signed char signed long long vector signed char * lvxl r,b,a vector unsigned char signed long long unsigned char * lvxl r,b,a vector unsigned char signed long long vector unsigned char * lvxl r,b,a vector bool short signed long long vector bool short * lvxl r,b,a vector signed short signed long long signed short * lvxl r,b,a vector signed short signed long long vector signed short * lvxl r,b,a vector unsigned short signed long long unsigned short * lvxl r,b,a vector unsigned short signed long long vector unsigned short * lvxl r,b,a vector pixel signed long long vector pixel * lvxl r,b,a vector bool int signed long long vector bool int * lvxl r,b,a vector signed int signed long long signed int * lvxl r,b,a vector signed int signed long long vector signed int * lvxl r,b,a vector unsigned int signed long long unsigned int * lvxl r,b,a vector unsigned int signed long long vector unsigned int * lvxl r,b,a vector bool long long signed long long vector bool long long * lvxl r,b,a vector signed long long signed long long signed long long * lvxl r,b,a vector signed long long signed long long vector signed long long * lvxl r,b,a vector unsigned long long signed long long unsigned long long * lvxl r,b,a vector unsigned long long signed long long vector unsigned long long * lvxl r,b,a vector float signed long long float * lvxl r,b,a vector float signed long long vector float * lvxl r,b,a vector double signed long long double * lvxl r,b,a vector double signed long long vector double * lvxl r,b,a Vector Base-2 Logarithm Estimate r = vec_loge (a) Purpose: Returns a vector containing estimates of the base-2 logarithms of the corresponding elements of the source vector. Result value: Each element of r contains an estimated value of the base-2 logarithm of the corresponding element of a. Endian considerations: None. vlogefp vec_loge r a Example Implementation vector float vector float vlogefp r,a Vector Multiply-Add r = vec_madd (a, b, c) Purpose: Returns a vector containing the results of performing a fused multiply-add operation for each corresponding set of elements of the source vectors. Result value: The value of each element of r is the product of the values of the corresponding elements of a and b, added to the value of the corresponding element of c. Endian considerations: None. vmladduhm vec_madd xvmaddmdp vec_madd xvmaddmsp vec_madd r a b c Example Implementation vector signed short vector signed short vector signed short vector signed short vmladduhm r,a,b,c vector signed short vector signed short vector unsigned short vector unsigned short vmladduhm r,a,b,c vector signed short vector unsigned short vector signed short vector signed short vmladduhm r,a,b,c vector unsigned short vector unsigned short vector unsigned short vector unsigned short vmladduhm r,a,b,c vector float vector float vector float vector float xvmaddmsp r/a,b,c vector double vector double vector double vector double xvmaddmdp r/a,b,c Vector Multiply-Add Saturated r = vec_madds (a, b, c) Purpose: Returns a vector containing the results of performing a saturated multiply-high-and-add operation for each corresponding set of elements of the source vectors. Result value: The value of each element of r is produced as follows: The values of the corresponding elements of a and b are multiplied. The value of the 17 most-significant bits of this product is then added, using 16-bit-saturated addition, to the value of the corresponding element of c. Endian considerations: None. vmhaddshs vec_madds r a b c Example Implementation vector signed short vector signed short vector signed short vector signed short vmhaddshs r,a,b,c Vector Maximum r = vec_max (a, b) Purpose: Returns a vector containing the maximum value from each set of corresponding elements of the source vectors. Result value: The value of each element of r is the maximum of the values of the corresponding elements of a and b. Endian considerations: None. vmaxsb vec_max vmaxub vec_max vmaxsw vec_max vmaxuw vec_max vmaxsd vec_max vmaxud vec_max vmaxsh vec_max vmaxuh vec_max xvmaxdp vec_max xvmaxsp vec_max r a b Example Implementation vector signed char vector signed char vector signed char vmaxsb r,a,b vector unsigned char vector unsigned char vector unsigned char vmaxub r,a,b vector signed short vector signed short vector signed short vmaxsh r,a,b vector unsigned short vector unsigned short vector unsigned short vmaxuh r,a,b vector signed int vector signed int vector signed int vmaxsw r,a,b vector unsigned int vector unsigned int vector unsigned int vmaxuw r,a,b vector signed long long vector signed long long vector signed long long vmaxsd r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vmaxud r,a,b vector float vector float vector float xvmaxsp r,a,b vector double vector double vector double xvmaxdp r,a,b Vector Merge Even r = vec_mergee (a, b) Purpose: Merges the even-numbered values from two vectors. Result value: The even-numbered elements of a are stored into the even-numbered elements of r. The even-numbered elements of b are stored into the odd-numbered elements of r. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmrgow vec_mergee vmrgew vec_mergee xxpermdi vec_mergee r a b Example LE Implementation Example BE Implementation vector bool int vector bool int vector bool int vmrgow r,b,a vmrgew r,a,b vector signed int vector signed int vector signed int vmrgow r,b,a vmrgew r,a,b vector unsigned int vector unsigned int vector unsigned int vmrgow r,b,a vmrgew r,a,b vector bool long long vector bool long long vector bool long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector signed long long vector signed long long vector signed long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector unsigned long long vector unsigned long long vector unsigned long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector float vector float vector float vmrgow r,b,a vmrgew r,a,b vector double vector double vector double xxpermdi r,b,a,3 xxpermdi r,a,b,0 Vector Merge High r = vec_mergeh (a, b) Purpose: Merges the first halves (in element order) of two vectors. Result value: The nth element of r, if n is an even number, is given the value of the (n/2)th element of a. The (n+1)th element of r, if n is an even number, is given the value of the (n/2)th element of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmrglb vec_mergeh xxpermdi vec_mergeh vmrghb vec_mergeh vmrglw vec_mergeh vmrghw vec_mergeh vmrglh vec_mergeh vmrghh vec_mergeh r a b Example LE Implementation Example BE Implementation vector bool char vector bool char vector bool char vmrglb r,b,a vmrghb r,a,b vector signed char vector signed char vector signed char vmrglb r,b,a vmrghb r,a,b vector unsigned char vector unsigned char vector unsigned char vmrglb r,b,a vmrghb r,a,b vector bool short vector bool short vector bool short vmrglh r,b,a vmrghh r,a,b vector signed short vector signed short vector signed short vmrglh r,b,a vmrghh r,a,b vector unsigned short vector unsigned short vector unsigned short vmrglh r,b,a vmrghh r,a,b vector pixel vector pixel vector pixel vmrglh r,b,a vmrghh r,a,b vector bool int vector bool int vector bool int vmrglw r,b,a vmrghw r,a,b vector signed int vector signed int vector signed int vmrglw r,b,a vmrghw r,a,b vector unsigned int vector unsigned int vector unsigned int vmrglw r,b,a vmrghw r,a,b vector bool long long vector bool long long vector bool long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector signed long long vector signed long long vector signed long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector unsigned long long vector unsigned long long vector unsigned long long xxpermdi r,b,a,3 xxpermdi r,a,b,0 vector float vector float vector float vmrglw r,b,a vmrghw r,a,b vector double vector double vector double xxpermdi r,b,a,3 xxpermdi r,a,b,0 Vector Merge Low r = vec_mergel (a, b) Purpose: Merges the last halves (in element order) of two vectors. Result value: Let m be the number of elements in r. The nth element of r, if n is an even number, is given the value of the m/2 + (n/2)th element of a. The (n+1)th element of r, if n is an even number, is given the value of the m/2 + (n/2)th element of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmrghb vec_mergel vmrglb vec_mergel vmrghw vec_mergel vmrglw vec_mergel xxpermdi vec_mergel vmrghh vec_mergel vmrglh vec_mergel r a b Example LE Implementation Example BE Implementation vector bool char vector bool char vector bool char vmrghb r,b,a vmrglb r,a,b vector signed char vector signed char vector signed char vmrghb r,b,a vmrglb r,a,b vector unsigned char vector unsigned char vector unsigned char vmrghb r,b,a vmrglb r,a,b vector bool short vector bool short vector bool short vmrghh r,b,a vmrglh r,a,b vector signed short vector signed short vector signed short vmrghh r,b,a vmrglh r,a,b vector unsigned short vector unsigned short vector unsigned short vmrghh r,b,a vmrglh r,a,b vector pixel vector pixel vector pixel vmrghh r,b,a vmrglh r,a,b vector bool int vector bool int vector bool int vmrghw r,b,a vmrglw r,a,b vector signed int vector signed int vector signed int vmrghw r,b,a vmrglw r,a,b vector unsigned int vector unsigned int vector unsigned int vmrghw r,b,a vmrglw r,a,b vector bool long long vector bool long long vector bool long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector signed long long vector signed long long vector signed long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector unsigned long long vector unsigned long long vector unsigned long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector float vector float vector float vmrghw r,b,a vmrglw r,a,b vector double vector double vector double xxpermdi r,b,a,0 xxpermdi r,a,b,3 Vector Merge Odd r = vec_mergeo (a, b) Purpose: Merges the odd-numbered values from two vectors. Result value: The odd-numbered elements of a are stored into the even-numbered elements of r. The odd-numbered elements of b are stored into the odd-numbered elements of r. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmrgew vec_mergeo vmrgow vec_mergeo xxpermdi vec_mergeo r a b Example LE Implementation Example BE Implementation vector bool int vector bool int vector bool int vmrgew r,b,a vmrgow r,a,b vector signed int vector signed int vector signed int vmrgew r,b,a vmrgow r,a,b vector unsigned int vector unsigned int vector unsigned int vmrgew r,b,a vmrgow r,a,b vector bool long long vector bool long long vector bool long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector signed long long vector signed long long vector signed long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector unsigned long long vector unsigned long long vector unsigned long long xxpermdi r,b,a,0 xxpermdi r,a,b,3 vector float vector float vector float vmrgew r,b,a vmrgow r,a,b vector double vector double vector double xxpermdi r,b,a,0 xxpermdi r,a,b,3 Vector Move From Vector Status and Control Register r = vec_mfvscr () Purpose: Copies the contents of the Vector Status and Control Register (VSCR) into the result vector. Result value: The high-order 16 bits of the VSCR are copied into the seventh element of r, using big-endian (left-to-right) order. The low-order 16 bits of the VSCR are copied into the eighth element of r, using big-endian order. All other elements of r are set to zero. Endian considerations: The contents of the VSCR are placed in the low-order 32 bits of the result vector, regardless of endianness. Notes: The use of vector unsigned short as the result type eases access to the two bits currently defined in the VSCR. Following execution of vec_mfvscr, r[6] will contain VSCRNJ in the low-order bit, and r[7] will contain VSCRSAT in the low-order bit. mfvscr vec_mfvscr r Example Implementation vector unsigned short mfvscr a Vector Minimum r = vec_min (a, b) Purpose: Returns a vector containing the minimum value from each set of corresponding elements of the source vectors. Result value: The value of each element of r is the minimum of the values of the corresponding elements of a and b. Endian considerations: None. vminsb vec_min vminub vec_min vminsw vec_min vminuw vec_min vminsd vec_min vminud vec_min vminsh vec_min vminuh vec_min xvmindp vec_min xvminsp vec_min r a b Example Implementation vector signed char vector signed char vector signed char vminsb r,a,b vector unsigned char vector unsigned char vector unsigned char vminub r,a,b vector signed short vector signed short vector signed short vminsh r,a,b vector unsigned short vector unsigned short vector unsigned short vminuh r,a,b vector signed int vector signed int vector signed int vminsw r,a,b vector unsigned int vector unsigned int vector unsigned int vminuw r,a,b vector signed long long vector signed long long vector signed long long vminsd r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vminud r,a,b vector float vector float vector float xvminsp r,a,b vector double vector double vector double xvmindp r,a,b Vector Multiply-High Round and Add Saturated r = vec_mradds (a, b, c) Purpose: Returns a vector containing the results of performing a saturated multiply-high-round-and-add operation for each corresponding set of elements of the source vectors. Result value: The value of each element of r is produced as follows. The values of the corresponding elements of a and b are multiplied and rounded such that the 15 least-significant bits are 0. The value of the 17 most-significant bits of this rounded product is then added, using 16-bit-saturated addition, to the value of the corresponding element of c. Endian considerations: None. vmhraddshs vec_mradds r a b c Example Implementation vector signed short vector signed short vector signed short vector signed short vmhraddshs r,a,b,c Vector Multiply-Subtract r = vec_msub (a, b, c) Purpose: Returns a vector containing the results of performing a multiply-subtract operation using the source vectors. Result value: Each element of r is produced by multiplying the corresponding element of a by the corresponding element of b and then subtracting the corresponding element of c. Endian considerations: None. xvmsubmdp vec_msub xvmsubmsp vec_msub r a b c Example Implementation vector float vector float vector float vector float xvmsubmsp r/a,b,c vector double vector double vector double vector double xvmsubmdp r/a,b,c Vector Multiply-Sum r = vec_msum (a, b, c) Purpose: Returns a vector containing the results of performing a multiply-sum operation using the source vectors. Result value: There are two cases: When a is of type vector signed char or vector unsigned char, each word element of r is computed as follows: Each of the four byte elements contained in the corresponding word element of a is multiplied by the corresponding byte element of b. The sum of these four halfword products is added to the corresponding word element in c and placed in the corresponding word element of r. When a is of type vector signed short or vector unsigned short, each word element of r is computed as follows: Each of the two halfword elements contained in the corresponding word element of a is multiplied by the corresponding halfword element of b. The sum of these two word products is added to the corresponding word element in c and placed in the corresponding word element of r. All operations are performed using 32-bit modular arithmetic. Endian considerations: None. vmsummbm vec_msum vmsumshm vec_msum vmsumubm vec_msum vmsumuhm vec_msum r a b c Example Implementation vector signed int vector signed char vector unsigned char vector signed int vmsummbm r,a,b,c vector signed int vector signed short vector signed short vector signed int vmsumshm r,a,b,c vector unsigned int vector unsigned char vector unsigned char vector unsigned int vmsumubm r,a,b,c vector unsigned int vector unsigned short vector unsigned short vector unsigned int vmsumuhm r,a,b,c Vector Multiply-Sum Saturated r = vec_msums (a, b, c) Purpose: Returns a vector containing the results of performing a saturated multiply-sum operation using the source vectors. Result value: Assume that the elements of each vector are numbered beginning with 0. The value of each element n of r is obtained as follows. For p = 2n to 2n+1, multiply element p of a by element p of b. Add the sum of these products to element n of c. All additions are performed using 32-bit saturated arithmetic. Endian considerations: None. vmsumshs vec_msums vmsumuhs vec_msums r a b c Example Implementation vector signed int vector signed short vector signed short vector signed int vmsumshs r,a,b,c vector unsigned int vector unsigned short vector unsigned short vector unsigned int vmsumuhs r,a,b,c Vector Move to Vector Status and Control Register vec_mtvscr (a) Purpose: Copies a value into the Vector Status and Control Register (VSCR). The low-order 32 bits of a are copied into the VSCR. Result value: None. Endian considerations: None. mtvscr vec_mtvscr a Example Implementation vector bool char mtvscr a vector signed char mtvscr a vector unsigned char mtvscr a vector bool short mtvscr a vector signed short mtvscr a vector unsigned short mtvscr a vector pixel mtvscr a vector bool int mtvscr a vector signed int mtvscr a vector unsigned int mtvscr a Vector Multiply r = vec_mul (a, b) Purpose: Compute the products of corresponding elements of two vectors. Result value: Each element of r receives the product of the corresponding elements of a and b. Endian considerations: None. Notes: The example implementation for vector char assumes that the address of the permute control vector for the vperm instruction is in a register identified by pcv. Its value is {1,17,3,19,5,21,7,23,9,25,11,27,13,29,15,31}. There are currently no vector instructions to support vector long long multiplication, so the compiler must perform two scalar multiplies on the vector elements for this case. vmulesb vec_mul vmulosb vec_mul lxvw4x vec_mul vperm vec_mul vmuluwm vec_mul xxspltib vec_mul vmladduhm vec_mul xvmuldp vec_mul xvmulsp vec_mul r a b Example Implementation vector signed char vector signed char vector signed char vmulesb t,a,b vmulosb u,a,b lxvw4x v,0,pcv vperm r,t,u,v vector unsigned char vector unsigned char vector unsigned char vmulesb t,a,b vmulosb u,a,b lxvw4x v,0,pcv vperm r,t,u,v vector signed short vector signed short vector signed short xxspltib t,0 vmladduhm r,a,b,t vector unsigned short vector unsigned short vector unsigned short xxspltib t,0 vmladduhm r,a,b,t vector signed int vector signed int vector signed int vmuluwm r,a,b vector unsigned int vector unsigned int vector unsigned int vmuluwm r,a,b vector signed long long vector signed long long vector signed long long [scalarized] vector unsigned long long vector unsigned long long vector unsigned long long [scalarized] vector float vector float vector float xvmulsp r,a,b vector double vector double vector double xvmuldp r,a,b Vector Multiply Even r = vec_mule (a, b) Purpose: Multiplies the even-numbered elements of the source vectors to produce the target vector. Result value: Each element n of r is the product of element 2n of a and element 2n of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmulosh vec_mule vmulesh vec_mule vmulouh vec_mule vmuleuh vec_mule vmulosw vec_mule vmulesw vec_mule vmulouw vec_mule vmuleuw vec_mule vmulosb vec_mule vmulesb vec_mule vmuloub vec_mule vmuleub vec_mule r a b Example LE Implementation Example BE Implementation vector signed short vector signed char vector signed char vmulosb r,a,b vmulesb r,a,b vector unsigned short vector unsigned char vector unsigned char vmuloub r,a,b vmuleub r,a,b vector signed int vector signed short vector signed short vmulosh r,a,b vmulesh r,a,b vector unsigned int vector unsigned short vector unsigned short vmulouh r,a,b vmuleuh r,a,b vector signed long long vector signed int vector signed int vmulosw r,a,b vmulesw r,a,b vector unsigned long long vector unsigned int vector unsigned int vmulouw r,a,b vmuleuw r,a,b Vector Multiply Odd r = vec_mulo (a, b) Purpose: Multiplies the odd-numbered elements of the source vectors to produce the target vector. Result value: Each element n of r is the product of element 2n+1 of a and element 2n+1 of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vmulesh vec_mulo vmulosh vec_mulo vmuleuh vec_mulo vmulouh vec_mulo vmulesw vec_mulo vmulosw vec_mulo vmuleuw vec_mulo vmulouw vec_mulo vmulesb vec_mulo vmulosb vec_mulo vmuleub vec_mulo vmuloub vec_mulo r a b Example LE Implementation Example BE Implementation vector signed short vector signed char vector signed char vmulesb r,a,b vmulosb r,a,b vector unsigned short vector unsigned char vector unsigned char vmuleub r,a,b vmuloub r,a,b vector signed int vector signed short vector signed short vmulesh r,a,b vmulosh r,a,b vector unsigned int vector unsigned short vector unsigned short vmuleuh r,a,b vmulouh r,a,b vector signed long long vector signed int vector signed int vmulesw r,a,b vmulosw r,a,b vector unsigned long long vector unsigned int vector unsigned int vmuleuw r,a,b vmulouw r,a,b Vector Negated Absolute Value r = vec_nabs (a) Purpose: Returns a vector containing the negated absolute values of the contents of the source vector. Result value: The value of each element of r is the negated absolute value of the corresponding element of a. For integer vectors, the arithmetic is modular. Endian considerations: None. vspltisw vec_nabs vsububm vec_nabs vminsb vec_nabs vsubuwm vec_nabs vminsw vec_nabs vsubudm vec_nabs vminsd vec_nabs vsubuhm vec_nabs vminsh vec_nabs xvnabsdp vec_nabs xvnabssp vec_nabs r a Example Implementation vector signed char vector signed char vspltisw t,0 vsububm u,t,a vminsb r,u,a vector signed short vector signed short vspltisw t,0 vsubuhm u,t,a vminsh r,u,a vector signed int vector signed int vspltisw t,0 vsubuwm u,t,a vminsw r,u,a vector signed long long vector signed long long vspltisw t,0 vsubudm u,t,a vminsd r,u,a vector float vector float xvnabssp r,a vector double vector double xvnabsdp r,a Vector NAND r = vec_nand (a, b) Purpose: Performs a bitwise NAND of two vectors. Result value: r is the bitwise NAND of a and b. Endian considerations: None. xxlnand vec_nand r a b Example Implementation vector bool char vector bool char vector bool char xxlnand r,a,b vector signed char vector signed char vector signed char xxlnand r,a,b vector unsigned char vector unsigned char vector unsigned char xxlnand r,a,b vector bool short vector bool short vector bool short xxlnand r,a,b vector signed short vector signed short vector signed short xxlnand r,a,b vector unsigned short vector unsigned short vector unsigned short xxlnand r,a,b vector bool int vector bool int vector bool int xxlnand r,a,b vector signed int vector signed int vector signed int xxlnand r,a,b vector unsigned int vector unsigned int vector unsigned int xxlnand r,a,b vector bool long long vector bool long long vector bool long long xxlnand r,a,b vector signed long long vector signed long long vector signed long long xxlnand r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlnand r,a,b vector float vector float vector float xxlnand r,a,b vector double vector double vector double xxlnand r,a,b Vector AES Inverse Cipher Big-Endian r = vec_ncipher_be (a, b) Purpose: Performs one round of the AES inverse cipher operation on an intermediate state array a by using a given round key b. Result value: r contains the resulting intermediate state, after one round of the AES inverse cipher operation on intermediate state array a, using the round key specified by b. Endian considerations: All element and bit numberings of the AES inverse cipher operation use big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_ncipher_be does not follow the bi-endian programming model. vncipher vec_ncipher_be r a b Example Implementation vector unsigned char vector unsigned char vector unsigned char vncipher r,a,b Vector AES Inverse Cipher Last Big-Endian r = vec_ncipherlast_be (a, b) Purpose: Performs the final round of the AES inverse cipher operation on an intermediate state array a using the specified round key b. Result value: r contains the resulting final state, after the final round of the AES inverse cipher operation on intermediate state array a, using the round key specified by b. Endian considerations: All element and bit numberings of the AES inverse cipher-last operation use big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_ncipherlast_be does not follow the bi-endian programming model. vncipherlast vec_ncipherlast_be r a b Example Implementation vector unsigned char vector unsigned char vector unsigned char vncipherlast r,a,b Vector Nearby Integer r = vec_nearbyint (a) Purpose: Returns a vector containing the floating-point integral values nearest to the values of the corresponding elements of the source vector. Result value: Each element of r contains the nearest representable floating-point integral value to the value of the corresponding element of a. When an input element value is exactly between two integer values, the input value with the larger absolute value is selected. The current floating-point rounding mode is ignored. Endian considerations: None. xvrdpi vec_nearbyint xvrspi vec_nearbyint r a Example Implementation vector float vector float xvrspi r,a vector double vector double xvrdpi r,a Vector Negate r = vec_neg (a) Purpose: Returns a vector containing the negated values of the contents of the source vector. Result value: The value of each element of r is the negated value of the corresponding element of a. For integer vectors, the arithmetic is modular. Endian considerations: None. vspltisw vec_neg vsububm vec_neg vsubuwm vec_neg vsubudm vec_neg vsubuhm vec_neg xvnegdp vec_neg xvnegsp vec_neg r a Example Implementation vector signed char vector signed char vspltisw t,0 vsububm r,t,a vector signed short vector signed short vspltisw t,0 vsubuhm r,t,a vector signed int vector signed int vspltisw t,0 vsubuwm r,t,a vector signed long long vector signed long long vspltisw t,0 vsubudm r,t,a vector float vector float xvnegsp r,a vector double vector double xvnegdp r,a Vector Negated Multiply-Add r = vec_nmadd (a, b, c) Purpose: Returns a vector containing the results of performing a negated multiply-add operation on the source vectors. Result value: The value of each element of r is the product of the corresponding elements of a and b, added to the corresponding elements of c, then multiplied by –1.0. Endian considerations: None. xvnmaddadp vec_nmadd xvnmaddasp vec_nmadd r a b c Example Implementation vector float vector float vector float vector float xvnmaddasp r/c,a,b vector double vector double vector double vector double xvnmaddadp r/c,a,b Vector Negated Multiply-Subtract r = vec_nmsub (a, b, c) Purpose: Returns a vector containing the results of performing a negated multiply-subtract operation on the source vectors. Result value: The value of each element of r is the value of the corresponding element of c subtracted from the product of the corresponding elements of a and b, and then multiplied by –1.0. Endian considerations: None. xvnmsubmdp vec_nmsub xvnmsubmsp vec_nmsub r a b c Example Implementation vector float vector float vector float vector float xvnmsubmsp r/a,b,c vector double vector double vector double vector double xvnmsubmdp r/a,b,c Vector NOR r = vec_nor (a, b) Purpose: Performs a bitwise NOR of two vectors. Result value: r is the bitwise NOR of a and b. Endian considerations: None. xxlnor vec_nor r a b Example Implementation vector bool char vector bool char vector bool char xxlnor r,a,b vector signed char vector signed char vector signed char xxlnor r,a,b vector unsigned char vector unsigned char vector unsigned char xxlnor r,a,b vector bool short vector bool short vector bool short xxlnor r,a,b vector signed short vector signed short vector signed short xxlnor r,a,b vector unsigned short vector unsigned short vector unsigned short xxlnor r,a,b vector bool int vector bool int vector bool int xxlnor r,a,b vector signed int vector signed int vector signed int xxlnor r,a,b vector unsigned int vector unsigned int vector unsigned int xxlnor r,a,b vector bool long long vector bool long long vector bool long long xxlnor r,a,b vector signed long long vector signed long long vector signed long long xxlnor r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlnor r,a,b vector float vector float vector float xxlnor r,a,b vector double vector double vector double xxlnor r,a,b Vector OR r = vec_or (a, b) Purpose: Performs a bitwise OR of two vectors. Result value: r is the bitwise OR of a and b. Endian considerations: None. xxlor vec_or r a b Example Implementation vector bool char vector bool char vector bool char xxlor r,a,b vector signed char vector signed char vector signed char xxlor r,a,b vector unsigned char vector unsigned char vector unsigned char xxlor r,a,b vector bool short vector bool short vector bool short xxlor r,a,b vector signed short vector signed short vector signed short xxlor r,a,b vector unsigned short vector unsigned short vector unsigned short xxlor r,a,b vector bool int vector bool int vector bool int xxlor r,a,b vector signed int vector signed int vector signed int xxlor r,a,b vector unsigned int vector unsigned int vector unsigned int xxlor r,a,b vector bool long long vector bool long long vector bool long long xxlor r,a,b vector signed long long vector signed long long vector signed long long xxlor r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlor r,a,b vector float vector float vector float xxlor r,a,b vector double vector double vector double xxlor r,a,b Vector OR with Complement r = vec_orc (a, b) Purpose: Performs a bitwise OR of the first vector with the bitwise-complemented second vector. Result value: r is the bitwise OR of a and the bitwise complement of b. Endian considerations: None. xxlorc vec_orc r a b Example Implementation vector bool char vector bool char vector bool char xxlorc r,a,b vector signed char vector signed char vector signed char xxlorc r,a,b vector unsigned char vector unsigned char vector unsigned char xxlorc r,a,b vector bool short vector bool short vector bool short xxlorc r,a,b vector signed short vector signed short vector signed short xxlorc r,a,b vector unsigned short vector unsigned short vector unsigned short xxlorc r,a,b vector bool int vector bool int vector bool int xxlorc r,a,b vector signed int vector signed int vector signed int xxlorc r,a,b vector unsigned int vector unsigned int vector unsigned int xxlorc r,a,b vector bool long long vector bool long long vector bool long long xxlorc r,a,b vector signed long long vector signed long long vector signed long long xxlorc r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlorc r,a,b vector float vector float vector float xxlorc r,a,b vector double vector double vector double xxlorc r,a,b Vector Pack r = vec_pack (a, b) Purpose: Packs information from each element of two vectors into the result vector. Result value: Let v represent the concatenation of vectors a and b. For integer types, the value of each element of r is taken from the low-order half of the corresponding element of v. For floating-point types, the value of each element of r is the corresponding element of v, rounded to the result type. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vpkuhum vec_pack vpkudum vec_pack vpkuwum vec_pack xxpermdi vec_pack xvcvdpsp vec_pack vmrgow vec_pack vmrgew vec_pack r a b Example LE Implementation Example BE Implementation vector bool char vector bool short vector bool short vpkuhum r,b,a vpkuhum r,a,b vector signed char vector signed short vector signed short vpkuhum r,b,a vpkuhum r,a,b vector unsigned char vector unsigned short vector unsigned short vpkuhum r,b,a vpkuhum r,a,b vector bool short vector bool int vector bool int vpkuwum r,b,a vpkuwum r,a,b vector signed short vector signed int vector signed int vpkuwum r,b,a vpkuwum r,a,b vector unsigned short vector unsigned int vector unsigned int vpkuwum r,b,a vpkuwum r,a,b vector bool int vector bool long long vector bool long long vpkudum r,b,a vpkudum r,a,b vector signed int vector signed long long vector signed long long vpkudum r,b,a vpkudum r,a,b vector unsigned int vector unsigned long long vector unsigned long long vpkudum r,b,a vpkudum r,a,b vector float vector double vector double xxpermdi t,b,a,0 xxpermdi u,b,a,3 xvcvdpsp t,t xvcvdpsp u,u vmrgow r,t,u xxpermdi t,a,b,0 xxpermdi u,a,b,3 xvcvdpsp t,t xvcvdpsp u,u vmrgew r,t,u Vector Pack 32-bit Float to Short r = vec_pack_to_short_fp32 (a, b) Purpose: Packs eight single-precision 32-bit floating-point numbers from two source vectors into a vector of eight 16-bit floating-point numbers. Result value: Let v represent the 16-element concatenation of a and b. Each value of r contains the result of converting the corresponding single-precision element of v to half-precision. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vctuxs vec_pack_to_short_fp32 vpkswss vec_pack_to_short_fp32 r a b Example LE Implementation Example BE Implementation Restrictions vector unsigned short vector float vector float vctuxs t,a,0 vctuxs u,b,0 vpkswss r,u,t vctuxs t,a,0 vctuxs u,b,0 vpkswss r,t,u ISA 3.0 or later Vector Pack Pixel r = vec_packpx (a, b) Purpose: Packs information from each element of two vectors into the result vector. Result value: Let v be the concatenation of a and b. The value of each element of r is taken from the corresponding element of v as follows: The least-significant bit of the high-order byte is stored into the first bit of the result element. The least-significant 5 bits of each of the remaining bytes are stored into the remaining portion of the result element. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vpkpx vec_packpx r a b Example LE Implementation Example BE Implementation vector pixel vector unsigned int vector unsigned int vpkpx r,b,a vpkpx r,a,b Vector Pack Saturated r = vec_packs (a, b) Purpose: Packs information from each element of two vectors into the result vector, using saturated values. Result value: Let v be the concatenation of a and b. The value of each element of r is the saturated value of the corresponding element of v. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vpkshss vec_packs vpkuhus vec_packs vpksdss vec_packs vpkudus vec_packs vpkswss vec_packs vpkuwus vec_packs r a b Example LE Implementation Example BE Implementation vector signed char vector signed short vector signed short vpkshss r,b,a vpkshss r,a,b vector unsigned char vector unsigned short vector unsigned short vpkuhus r,b,a vpkuhus r,a,b vector signed short vector signed int vector signed int vpkswss r,b,a vpkswss r,a,b vector unsigned short vector unsigned int vector unsigned int vpkuwus r,b,a vpkuwus r,a,b vector signed int vector signed long long vector signed long long vpksdss r,b,a vpksdss r,a,b vector unsigned int vector unsigned long long vector unsigned long long vpkudus r,b,a vpkudus r,a,b Vector Pack Saturated Unsigned r = vec_packsu (a, b) Purpose: Packs information from each element of two vectors into the result vector, using unsigned saturated values. Result value: Let v be the concatenation of a and b. The value of each element of r is the saturated value of the corresponding element of v. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vpkshus vec_packsu vpkuhus vec_packsu vpksdus vec_packsu vpkudus vec_packsu vpkswus vec_packsu vpkuwus vec_packsu r a b Example LE Implementation Example BE Implementation vector unsigned char vector signed short vector signed short vpkshus r,b,a vpkshus r,a,b vector unsigned char vector unsigned short vector unsigned short vpkuhus r,b,a vpkuhus r,a,b vector unsigned short vector signed int vector signed int vpkswus r,b,a vpkswus r,a,b vector unsigned short vector unsigned int vector unsigned int vpkuwus r,b,a vpkuwus r,a,b vector unsigned int vector signed long long vector signed long long vpksdus r,b,a vpksdus r,a,b vector unsigned int vector unsigned long long vector unsigned long long vpkudus r,b,a vpkudus r,a,b Vector Parity over Least-Significant Bits of Bytes r = vec_parity_lsbb (a) Purpose: Compute parity on the least-significant bit of each byte. Result value: Each element of r contains the parity computed over the low-order bit of each of the bytes in the corresponding element of a. Endian considerations: None. vprtybw vec_parity_lsbb vprtybq vec_parity_lsbb vprtybd vec_parity_lsbb r a Example Implementation Restrictions vector unsigned int vector signed int vprtybw r,a ISA 3.0 or later vector unsigned int vector unsigned int vprtybw r,a ISA 3.0 or later vector unsigned long long vector signed long long vprtybd r,a ISA 3.0 or later vector unsigned long long vector unsigned long long vprtybd r,a ISA 3.0 or later vector unsigned __int128 vector signed __int128 vprtybq r,a ISA 3.0 or later vector unsigned __int128 vector unsigned __int128 vprtybq r,a ISA 3.0 or later Vector Permute r = vec_perm (a, b, c) Purpose: Returns a vector that contains elements selected from two vectors, in the order specified by a third vector. Result value: Let v be the concatenation of a and b. Each byte of r selected by using the least-significant 5 bits of the corresponding byte of c as an index into v. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. Notes: The example little-endian code generation uses the vpermr instruction from ISA 3.0. For earlier targets, the compiler must generate an extra instruction to adjust the permute control vector c. The vec_perm built-in should only use permutations that reorder vector elements of the specified type, not to reorder bytes within those elements. The results are not guaranteed to be consistent across big- and little-endian if you violate this rule. See . vpermr vec_perm vperm vec_perm r a b c Example LE Implementation Example BE Implementation vector bool char vector bool char vector bool char vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector signed char vector signed char vector signed char vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector unsigned char vector unsigned char vector unsigned char vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector bool short vector bool short vector bool short vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector signed short vector signed short vector signed short vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector unsigned short vector unsigned short vector unsigned short vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector pixel vector pixel vector pixel vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector bool int vector bool int vector bool int vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector signed int vector signed int vector signed int vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector unsigned int vector unsigned int vector unsigned int vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector bool long long vector bool long long vector bool long long vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector signed long long vector signed long long vector signed long long vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector unsigned long long vector unsigned long long vector unsigned long long vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector float vector float vector float vector unsigned char vpermr r,b,a,c vperm r,a,b,c vector double vector double vector double vector unsigned char vpermr r,b,a,c vperm r,a,b,c Vector Permute and Exclusive-OR r = vec_permxor (a, b, c) Purpose: Applies a permute and exclusive-OR operation on two vectors of byte elements, with the selected elements identified by a third vector. Result value: For each i (0 ≤ i < 16), let x be bits 0–3 and y be bits 4–7 of byte element i of c. Byte element i of r is set to the exclusive-OR of byte elements x of a and y of b. An example follows: a F0 F1 F2 F3 F4 F5 F6 F7 F8 F9 FA FB FC FD FE FF b FF EF DF CF BF AF 9F 8F 7F 6F 5F 4F 3F 2F 1F 0F c 01 23 45 67 89 AB CD EF F0 E1 D2 C3 B4 A5 96 87 x y 0 1 2 3 4 5 6 7 8 9 A B C D E F F 0 E 1 D 2 C 3 B 4 A 5 9 6 8 7 ax by F0 EF F2 CF F4 AF F6 8F F8 6F FA 4F FC 2F FE 0F FF FF FE EF FD DF FC CF FB BF FA AF F9 9F F8 8F r 1F 3D 5B 79 97 B5 D3 F1 00 11 22 33 44 55 66 77 Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxlnor vec_permxor vpermxor vec_permxor r a b c Example LE Implementation Example BE Implementation vector bool char vector bool char vector bool char vector bool char xxlnor t,c,c vpermxor r,a,b,t vpermxor r,a,b,c vector unsigned char vector signed char vector signed char vector signed char xxlnor t,c,c vpermxor r,a,b,t vpermxor r,a,b,c vector unsigned char vector unsigned char vector unsigned char vector unsigned char xxlnor t,c,c vpermxor r,a,b,t vpermxor r,a,b,c Vector Polynomial Multiply-Sum Big-Endian r = vec_pmsum_be (a, b) Purpose: Performs the exclusive-OR operation (implementing polynomial addition) on each even-odd pair of the polynomial-multiplication result of the corresponding elements of a and b. Result value: Each element i of r is computed by an exclusive-OR operation of the polynomial multiplication of input elements 2 × i of a and b and input elements 2 × i + 1 of a and b. An example follows for inputs of type vector unsigned int: a A3000000 00A20000 0000A100 000000A0 b 00B30000 0000B200 000000B1 B00000B0 binary polynomial multiplicands A3000000 00B30000 00A20000 0000B200 0000A100 000000B1 000000A0 B00000B0 intermediate results XOR operands 004E350000000000 0000004E24000000 00000000004E1100 0000004E00004E00 r 004E354E24000000 0000004E004E5F00 Endian considerations: All element numberings in the above description denote big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_pmsum_be does not follow the bi-endian programming model. vpmsumh vec_pmsum_be vpmsumd vec_pmsum_be vpmsumw vec_pmsum_be vpmsumb vec_pmsum_be r a b Example Implementation vector unsigned short vector unsigned char vector unsigned char vpmsumb r,a,b vector unsigned int vector unsigned short vector unsigned short vpmsumh r,a,b vector unsigned long long vector unsigned int vector unsigned int vpmsumw r,a,b vector unsigned __int128 vector unsigned long long vector unsigned long long vpmsumd r,a,b Vector Population Count r = vec_popcnt (a) Purpose: Returns a vector containing the number of bits set in each element of the source vector. Result value: The value of each element of r is the number of bits set in the corresponding element of a. Endian considerations: None. vpopcntb vec_popcnt vpopcntw vec_popcnt vpopcntd vec_popcnt vpopcnth vec_popcnt r a Example Implementation vector unsigned char vector signed char vpopcntb r,a vector unsigned char vector unsigned char vpopcntb r,a vector unsigned short vector signed short vpopcnth r,a vector unsigned short vector unsigned short vpopcnth r,a vector unsigned int vector signed int vpopcntw r,a vector unsigned int vector unsigned int vpopcntw r,a vector unsigned long long vector signed long long vpopcntd r,a vector unsigned long long vector unsigned long long vpopcntd r,a Vector Reciprocal Estimate r = vec_re (a) Purpose: Returns a vector containing estimates of the reciprocals of the corresponding elements of the source vector. Result value: Each element of r contains the estimated value of the reciprocal of the corresponding element of a. Endian considerations: None. Notes: For finite reciprocals, this intrinsic guarantees at least 14 bits of accuracy. xvredp vec_re xvresp vec_re r a Example Implementation vector float vector float xvresp r,a vector double vector double xvredp r,a Vector Reciprocal Divide r = vec_recipdiv (a, b) Purpose: Returns a vector containing refined approximations of the division of the corresponding elements of a by the corresponding elements of b. Result value: Each element of r contains a refined approximation of the division of the corresponding element of a by the corresponding element of b. Endian considerations: None. Notes: The example implementation for vector double assumes that a register z initially contains the double-precision floating-point value 1.0 in each doubleword. For finite reciprocals, this intrinsic guarantees at least 23 bits of accuracy for single-precision floating point, and at least 52 bits of accuracy for double-precision floating point. This built-in function does not correspond to a single IEEE operation and does not provide the overflow, underflow, and NaN propagation characteristics specified for IEEE division. xvredp vec_recipdiv xvnmsubadp vec_recipdiv xvmaddmdp vec_recipdiv xvmuldp vec_recipdiv xvresp vec_recipdiv xvmulsp vec_recipdiv xvnmsubasp vec_recipdiv xvmaddmsp vec_recipdiv r a b Example Implementation vector float vector float vector float xvresp t,b xvmulsp u,a,t xvnmsubasp r/a,b,u xvmaddmsp r/a,t,u vector double vector double vector double xvredp t,b xvnmsubadp z,b,t xvmaddadp u,z,t xvmuldp v,a,u xvnmsubadp r/a,b,v xvmaddmdp r/a,u,v Vector Reverse Bytes r = vec_revb (a) Purpose: Reverse the bytes of each vector element of a vector. Result value: Each element of r contains the byte-reversed value of the corresponding element of a. Endian considerations: None. Notes: The examples shown are for ISA 3.0. More complex sequences are required for earlier ISA levels. Interfaces that make no change to the data are deprecated. xxbrw vec_revb xxbrq vec_revb xxbrd vec_revb xxbrh vec_revb r a Example ISA 3.0 Implementation Restrictions vector bool char vector bool char [none] Deprecated vector signed char vector signed char [none] Deprecated vector unsigned char vector unsigned char [none] Deprecated vector bool short vector bool short xxbrh r,a Deprecated vector signed short vector signed short xxbrh r,a vector unsigned short vector unsigned short xxbrh r,a vector bool int vector bool int xxbrw r,a Deprecated vector signed int vector signed int xxbrw r,a vector unsigned int vector unsigned int xxbrw r,a vector bool long long vector bool long long xxbrd r,a Deprecated vector signed long long vector signed long long xxbrd r,a vector unsigned long long vector unsigned long long xxbrd r,a vector signed __int128 vector signed __int128 xxbrq r,a vector unsigned __int128 vector unsigned __int128 xxbrq r,a vector float vector float xxbrw r,a vector double vector double xxbrd r,a Vector Reverse Elements r = vec_reve (a) Purpose: Reverse the elements of a vector. Result value: Returns a vector with the elements of the source vector in reversed order. Endian considerations: The vpermr instruction is most naturally used to implement this built-in function for a little-endian target, and the vperm instruction for a big-endian target. This is not technically necessary, however, provided the correct permute control vector is used. Note that use of vpermr requires ISA 3.0. Notes: The example implementations assume that the permute control vector for the vperm or vpermr instruction is in a register identified by pcv. The value of pcv differs based on the element size, and is the same (in natural element order) for big- and little-endian, assuming the use of vperm for big-endian and vpermr for little-endian. Vector types Permute control vector vector char { 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0 } vector short { 14, 15, 12, 13, 10, 11, 8, 9, 6, 7, 4, 5, 2, 3, 0, 1 } vector int, vector float { 12, 13, 14, 15, 8, 9, 10, 11, 4, 5, 6, 7, 0, 1, 2, 3 } vector long long, vector double { 8, 9, 10, 11, 12, 13, 14, 15, 0, 1, 2, 3, 4, 5, 6, 7 } vperm vec_reve vpermr vec_reve r a Example Implementation vector bool char vector bool char vperm[r] r,a,a,pcv vector signed char vector signed char vperm[r] r,a,a,pcv vector unsigned char vector unsigned char vperm[r] r,a,a,pcv vector bool short vector bool short vperm[r] r,a,a,pcv vector signed short vector signed short vperm[r] r,a,a,pcv vector unsigned short vector unsigned short vperm[r] r,a,a,pcv vector bool int vector bool int vperm[r] r,a,a,pcv vector signed int vector signed int vperm[r] r,a,a,pcv vector unsigned int vector unsigned int vperm[r] r,a,a,pcv vector bool long long vector bool long long vperm[r] r,a,a,pcv vector signed long long vector signed long long vperm[r] r,a,a,pcv vector unsigned long long vector unsigned long long vperm[r] r,a,a,pcv vector float vector float vperm[r] r,a,a,pcv vector double vector double vperm[r] r,a,a,pcv Vector Round to Nearest Integer r = vec_rint (a) Purpose: Returns a vector containing the floating-point integral values nearest to the values of the corresponding elements of the source vector. Result value: Each element of r contains the nearest representable floating-point integral value to the value of the corresponding element of a. When an input element value is exactly between two integer values, the result value is selected based on the rounding mode specified by the Floating-Point Rounding Control field (RN) of the FPSCR register. Endian considerations: None. xvrdpic vec_rint xvrspic vec_rint r a Example Implementation vector float vector float xvrspic r,a vector double vector double xvrdpic r,a Vector Rotate Left r = vec_rl (a, b) Purpose: Rotates each element of a vector left by a given number of bits. Result value: Each element of r is obtained by rotating the corresponding element of a left by the number of bits specified by the corresponding element of b. Endian considerations: None. vrlb vec_rl vrlw vec_rl vrld vec_rl vrlh vec_rl r a b Example Implementation vector signed char vector signed char vector unsigned char vrlb r,a,b vector unsigned char vector unsigned char vector unsigned char vrlb r,a,b vector signed short vector signed short vector unsigned short vrlh r,a,b vector unsigned short vector unsigned short vector unsigned short vrlh r,a,b vector signed int vector signed int vector unsigned int vrlw r,a,b vector unsigned int vector unsigned int vector unsigned int vrlw r,a,b vector signed long long vector signed long long vector unsigned long long vrld r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vrld r,a,b Vector Rotate Left then Mask Insert r = vec_rlmi (a, b, c) Purpose: Rotates each element of a vector left and inserts each element under a mask. Result value: Each element of r is obtained by rotating the corresponding element of vector b left and inserting it under mask into the corresponding element of a. Bits 11:15 of the corresponding element of c contain the mask beginning, bits 19:23 contain the mask end, and bits 27:31 contain the shift count. Endian considerations: The referenced bit numbers within the elements of c are in left-to-right order. vrlwmi vec_rlmi vrldmi vec_rlmi r a b c Example Implementation Restrictions vector unsigned int vector unsigned int vector unsigned int vector unsigned int vrlwmi r/a,b,c ISA 3.0 or later vector unsigned long long vector unsigned long long vector unsigned long long vector unsigned long long vrldmi r/a,b,c ISA 3.0 or later Vector Rotate Left then AND with Mask r = vec_rlnm (a, b, c) Purpose: Rotates each element of a vector left, then logically ANDs it with a mask. Result value: Each element of a is rotated left, then logically ANDed with a mask specified by b and c. b contains the shift count for each element in the low-order byte, with other bytes zero. c contains the mask begin and mask end for each element, with the mask end in the low-order byte, the mask begin in the next higher byte, and other bytes zero. Endian considerations: None. vspltisw vec_rlnm vslw vec_rlnm xxlor vec_rlnm vrlwnm vec_rlnm xxspltib vec_rlnm vextsb2d vec_rlnm vsld vec_rlnm vrldnm vec_rlnm r a b c Example Implementation Restrictions vector unsigned int vector unsigned int vector unsigned int vector unsigned int vspltisw t,8 vslw u,b,t xxlor v,u,c vrlwnm r,a,v ISA 3.0 or later vector unsigned long long vector unsigned long long vector unsigned long long vector unsigned long long xxspltib t,8 vextsb2d u,t vsld v,b,u xxlor w,v,c vrldnm r,a,w ISA 3.0 or later Vector Round r = vec_round (a) Purpose: Returns a vector containing the rounded values of the corresponding elements of the source vector. Result value: Each element of r contains the value of the corresponding element of a, rounded to the nearest representable floating-point integer, using IEEE round-to-nearest rounding. The current floating-point rounding mode is ignored. Notes: This function might not follow the strict operation definition of the resolution of a tie during a round if the -qstrict=nooperationprecision compiler option is specified to the XLC compiler. Endian considerations: None. xvrdpi vec_round vrfin vec_round r a Example Implementation vector float vector float vrfin r,a vector double vector double xvrdpi r,a Vector Reciprocal Square Root r = vec_rsqrt (a) Purpose: Returns a vector containing a refined approximation of the reciprocal square roots of the corresponding elements of the source vector. This function provides an implementation-dependent greater precision than vec_rsqrte. Result value: Each element of r contains a refined approximation of the reciprocal square root of the corresponding element of a. Endian considerations: None. Notes: The example implementations assume that a register h initially contains the floating-point value 0.5 in each element (single- or double-precision as appropriate). For finite square roots, this intrinsic guarantees at least 23 bits of accuracy for single-precision floating point, and at least 52 bits of accuracy for double-precision floating point. xvrsqrtedp vec_rsqrt xvmuldp vec_rsqrt xxlor vec_rsqrt xvnmsubadp vec_rsqrt xvmaddadp vec_rsqrt xvnmsubmdp vec_rsqrt xvadddp vec_rsqrt xvrsqrtesp vec_rsqrt xvmulsp vec_rsqrt xvnmsubmsp vec_rsqrt xvmaddmsp vec_rsqrt r a Example Implementation vector float vector float xvrsqrtesp t,a xvmulsp u,t,a xvmulsp v,t,h xvnmsubmsp v,u,h xvmaddmsp r/v,t,t vector double vector double xvrsqrtedp t,a xvmuldp u,t,a xvmuldp v,t,h xxlor w,h,h xvnmsubadp w,u,v xvmaddadp v,v,w xvmaddadp u,u,w xvnmsubmdp u,v,h xvmaddadp v,v,u xvadddp r,v,v Vector Reciprocal Square Root Estimate r = vec_rsqrte (a) Purpose: Returns a vector containing estimates of the reciprocal square roots of the corresponding elements of the source vector. Result value: Each element of r contains the estimated value of the reciprocal square root of the corresponding element of a. Endian considerations: None. Notes: For finite square roots, this intrinsic guarantees at least 14 bits of accuracy. xvrsqrtedp vec_rsqrte xvrsqrtesp vec_rsqrte r a Example Implementation vector float vector float xvrsqrtesp r,a vector double vector double xvrsqrtedp r,a Vector AES SubBytes Big-Endian r = vec_sbox_be (a) Purpose: Performs the SubBytes operation, as defined in Federal Information Processing Standards FIPS-197, on a state_array contained in a. Result value: r contains the result of the SubBytes operation, as defined in Federal Information Processing Standard FIPS-197, on the state array represented by a. Endian considerations: All element numberings of the SubBytes operation use big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_sbox_be does not follow the bi-endian programming model. vsbox vec_sbox_be r a Example Implementation vector unsigned char vector unsigned char vsbox r,a Vector Select r = vec_sel (a, b, c) Purpose: Returns a vector selecting bits from two source vectors depending on the corresponding bit values of a third source vector. Result value: Each bit of r has the value of the corresponding bit of a if the corresponding bit of c is 0. Otherwise, the bit of r has the value of the corresponding bit of b. Endian considerations: None. xxsel vec_sel r a b c Example Implementation vector bool char vector bool char vector bool char vector bool char xxsel r,a,b,c vector bool char vector bool char vector bool char vector unsigned char xxsel r,a,b,c vector signed char vector signed char vector signed char vector bool char xxsel r,a,b,c vector signed char vector signed char vector signed char vector unsigned char xxsel r,a,b,c vector unsigned char vector unsigned char vector unsigned char vector bool char xxsel r,a,b,c vector unsigned char vector unsigned char vector unsigned char vector unsigned char xxsel r,a,b,c vector bool short vector bool short vector bool short vector bool short xxsel r,a,b,c vector bool short vector bool short vector bool short vector unsigned short xxsel r,a,b,c vector signed short vector signed short vector signed short vector bool short xxsel r,a,b,c vector signed short vector signed short vector signed short vector unsigned short xxsel r,a,b,c vector unsigned short vector unsigned short vector unsigned short vector bool short xxsel r,a,b,c vector unsigned short vector unsigned short vector unsigned short vector unsigned short xxsel r,a,b,c vector bool int vector bool int vector bool int vector bool int xxsel r,a,b,c vector bool int vector bool int vector bool int vector unsigned int xxsel r,a,b,c vector signed int vector signed int vector signed int vector bool int xxsel r,a,b,c vector signed int vector signed int vector signed int vector unsigned int xxsel r,a,b,c vector unsigned int vector unsigned int vector unsigned int vector bool int xxsel r,a,b,c vector unsigned int vector unsigned int vector unsigned int vector unsigned int xxsel r,a,b,c vector bool long long vector bool long long vector bool long long vector bool long long xxsel r,a,b,c vector bool long long vector bool long long vector bool long long vector unsigned long long xxsel r,a,b,c vector signed long long vector signed long long vector signed long long vector bool long long xxsel r,a,b,c vector signed long long vector signed long long vector signed long long vector unsigned long long xxsel r,a,b,c vector unsigned long long vector unsigned long long vector unsigned long long vector bool long long xxsel r,a,b,c vector unsigned long long vector unsigned long long vector unsigned long long vector unsigned long long xxsel r,a,b,c vector float vector float vector float vector bool int xxsel r,a,b,c vector float vector float vector float vector unsigned int xxsel r,a,b,c vector double vector double vector double vector bool long long xxsel r,a,b,c vector double vector double vector double vector unsigned long long xxsel r,a,b,c Vector SHA Sigma Big-Endian r = vec_shasigma_be (a, b, c) Purpose: Performs a Secure Hash computation in accordance with Federal Information Processing Standards FIPS-180-3. Result value: Each element of r contains the SHA256 or SHA512 hash as follows. The result of the SHA-256 function (r[i] for i = 0 to 3) is: σ0(a[i]), if b is 0 and bit i of the 4-bit c is 0. σ1(a[i]), if b is 0 and bit i of the 4-bit c is 1. Σ0(a[i]), if b is nonzero and bit i of the 4-bit c is 0. Σ1(a[i]), if b is nonzero and bit i of the 4-bit c is 1. The result of the SHA-512 function (r[i] for i = 0 to 1) is: σ0(a[i]), if b is 0 and bit 2 × i of the 4-bit c is 0. σ1(a[i]), if b is 0 and bit 2 × i of the 4-bit c is 1. Σ0(a[i]), if b is nonzero and bit 2 × i of the 4-bit c is 0. Σ1(a[i]), if b is nonzero and bit 2 × i of the 4-bit c is 1. Endian considerations: All element numberings in the above description denote big-endian (i.e., left-to-right) order, reflecting the underlying hardware instruction. Unlike most of the vector intrinsics in this chapter, vec_pmsum_be does not follow the bi-endian programming model. vshasigmaw vec_shasigma_be r a b c Example Implementation vector unsigned int vector unsigned int const int 4-bit unsigned literal vshasigmaw r,a,b,c vector unsigned long long vector unsigned long long const int 4-bit unsigned literal vshasigmaw r,a,b,d Vector Convert Floating-Point to Signed Integer r = vec_signed (a) Purpose: Converts a vector of floating-point numbers to a vector of signed integers. Result value: Each element of r is obtained by truncating the corresponding element of a to a signed integer. The current floating-point rounding mode is ignored. Endian considerations: None. xvcvspsxws vec_signed xvcvdpsxds vec_signed r a Example Implementation vector signed int vector float xvcvspsxws r,a vector signed long long vector double xvcvdpsxds r,a Vector Convert Double-Precision to Signed Word r = vec_signed2 (a, b) Purpose: Converts two vectors of double-precision floating-point numbers to a vector of signed 32-bit integers. Result value: Let v be the concatenation of a and b. Each element of r is obtained by truncating the corresponding element of v to a signed 32-bit integer. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxpermdi vec_signed2 xvcvdpsxws vec_signed2 vmrgow vec_signed2 vmrgew vec_signed2 r a b Example LE Implementation Example BE Implementation vector signed int vector double vector double xxpermdi t,b,a,3 xxpermdi u,b,a,0 xvcvdpsxws v,t xvcvdpsxws w,u vmrgow r,w,v xxpermdi t,a,b,0 xxpermdi u,a,b,3 xvcvdpsxws v,t xvcvdpsxws w,u vmrgew r,v,w Vector Convert Double-Precision to Signed Word Even r = vec_signede (a) Purpose: Converts elements of a source vector to signed integers and stores them in the even-numbered elements of the result vector. Result value: Element 0 of r contains element 0 of a, truncated to a signed integer. Element 2 of r contains element 1 of a, truncated to a signed integer. Elements 1 and 3 of r are undefined. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvdpsxws vec_signede vsldoi vec_signede r a Example LE Implementation Example BE Implementation vector signed int vector double xvcvdpsxws t,a vsldoi r,t,t,12 xvcvdpsxws t,a Vector Convert Double-Precision to Signed Word Odd r = vec_signedo (a) Purpose: Converts elements of a source vector to signed integers and stores them in the odd-numbered elements of the result vector. Result value: Element 1 of r contains element 0 of a, truncated to a signed integer. Element 3 of r contains element 1 of a, truncated to a signed integer. Elements 0 and 2 of r are undefined. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvdpsxws vec_signedo vsldoi vec_signedo r a Example LE Implementation Example BE Implementation vector signed int vector double xvcvdpsxws r,a xvcvdpsxws t,a vsldoi r,t,t,12 Vector Shift Left r = vec_sl (a, b) Purpose: Performs a left shift for each element of a vector. Result value: Each element of r is the result of left-shifting the corresponding element of a by the number of bits specified by the corresponding element of b, modulo the number of bits in the element. Zeros are shifted in from the right. Endian considerations: None. vslb vec_sl vslw vec_sl vsld vec_sl vslh vec_sl r a b Example Implementation vector signed char vector signed char vector unsigned char vslb r,a,b vector unsigned char vector unsigned char vector unsigned char vslb r,a,b vector signed short vector signed short vector unsigned short vslh r,a,b vector unsigned short vector unsigned short vector unsigned short vslh r,a,b vector signed int vector signed int vector unsigned int vslw r,a,b vector unsigned int vector unsigned int vector unsigned int vslw r,a,b vector signed long long vector signed long long vector unsigned long long vsld r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vsld r,a,b Vector Shift Left Double r = vec_sld (a, b, c) Purpose: Left shifts a double vector (that is, two concatenated vectors) by a given number of bytes. For vec_sld being performed on the vector bool and floating-point types, the result is undefined when the specified shift count is not a multiple of the element size. Result value: Vector r receives the most-significant 16 bytes obtained by concatenating a and b and shifting left by the number of bytes specified by c, which must be in the range 0–15. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_sld in big-endian code must be rewritten for little-endian targets. Historically, vec_sld could be used to shift by amounts not a multiple of the element size for most types, in which case the purpose of the shift is difficult to determine and difficult to automatically rewrite efficiently for little endian. So the concatenation of a and b is done in big-endian fashion (left to right), and the shift is always to the left. This will generally produce surprising results for little-endian targets. See also . vsldoi vec_sld r a b c Example Implementation vector bool char vector bool char vector bool char 4-bit unsigned literal vsldoi r,a,b,c vector signed char vector signed char vector signed char 4-bit unsigned literal vsldoi r,a,b,c vector unsigned char vector unsigned char vector unsigned char 4-bit unsigned literal vsldoi r,a,b,c vector bool short vector bool short vector bool short 4-bit unsigned literal vsldoi r,a,b,c vector signed short vector signed short vector signed short 4-bit unsigned literal vsldoi r,a,b,c vector unsigned short vector unsigned short vector unsigned short 4-bit unsigned literal vsldoi r,a,b,c vector pixel vector pixel vector pixel 4-bit unsigned literal vsldoi r,a,b,c vector bool int vector bool int vector bool int 4-bit unsigned literal vsldoi r,a,b,c vector signed int vector signed int vector signed int 4-bit unsigned literal vsldoi r,a,b,c vector unsigned int vector unsigned int vector unsigned int 4-bit unsigned literal vsldoi r,a,b,c vector bool long long vector bool long long vector bool long long 4-bit unsigned literal vsldoi r,a,b,c vector signed long long vector signed long long vector signed long long 4-bit unsigned literal vsldoi r,a,b,c vector unsigned long long vector unsigned long long vector unsigned long long 4-bit unsigned literal vsldoi r,a,b,c vector float vector float vector float 4-bit unsigned literal vsldoi r,a,b,c vector double vector double vector double 4-bit unsigned literal vsldoi r,a,b,c Vector Shift Left Double by Words r = vec_sldw (a, b, c) Purpose: Returns a vector obtained by shifting left the concatenated source vectors by the number of specified words. Result value: Vector r receives the most-significant 16 bytes obtained by concatenating a and b and shifting left by the number of words specified by c, which must be in the range 0–3. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_sldw in big-endian code must be rewritten for little-endian targets. The concatenation of a and b is done in big-endian fashion (left to right), and the shift is always to the left. This will generally produce surprising results for little-endian targets. xxsldwi vec_sldw r a b c Example Implementation vector signed char vector signed char vector signed char 2-bit unsigned literal xxsldwi r,a,b,c vector unsigned char vector unsigned char vector unsigned char 2-bit unsigned literal xxsldwi r,a,b,c vector signed short vector signed short vector signed short 2-bit unsigned literal xxsldwi r,a,b,c vector unsigned short vector unsigned short vector unsigned short 2-bit unsigned literal xxsldwi r,a,b,c vector signed int vector signed int vector signed int 2-bit unsigned literal xxsldwi r,a,b,c vector unsigned int vector unsigned int vector unsigned int 2-bit unsigned literal xxsldwi r,a,b,c vector signed long long vector signed long long vector signed long long 2-bit unsigned literal xxsldwi r,a,b,c vector unsigned long long vector unsigned long long vector unsigned long long 2-bit unsigned literal xxsldwi r,a,b,c Vector Shift Left Long r = vec_sll (a, b) Purpose: Left shifts an entire vector by a given number of bits. Result value: Vector r contains the contents of a, shifted left by the number of bits specified by the three least-significant bits of b. Zeros are supplied on the right. The shift count must have been replicated into all bytes of b; if not, the value of r is undefined. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_sll in big-endian code must be rewritten for little-endian targets. vsl vec_sll r a b Example Implementation vector signed char vector signed char vector unsigned char vsl r,a,b vector unsigned char vector unsigned char vector unsigned char vsl r,a,b vector signed short vector signed short vector unsigned char vsl r,a,b vector unsigned short vector unsigned short vector unsigned char vsl r,a,b vector pixel vector pixel vector unsigned char vsl r,a,b vector signed int vector signed int vector unsigned char vsl r,a,b vector unsigned int vector unsigned int vector unsigned char vsl r,a,b vector signed long long vector signed long long vector unsigned char vsl r,a,b vector unsigned long long vector unsigned long long vector unsigned char vsl r,a,b Vector Shift Left by Octets r = vec_slo (a, b) Purpose: Left shifts a vector by a given number of bytes (octets). Result value: Vector r receives the contents of a, shifted left by the number of bytes specified by bits 1:4 of the least-significant byte of b. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_slo in big-endian code must be rewritten for little-endian targets. The shift count is in element 15 of b for big-endian, but in element 0 of b for little-endian. vslo vec_slo r a b Example Implementation vector signed char vector signed char vector signed char vslo r,a,b vector signed char vector signed char vector unsigned char vslo r,a,b vector unsigned char vector unsigned char vector signed char vslo r,a,b vector unsigned char vector unsigned char vector unsigned char vslo r,a,b vector signed short vector signed short vector signed char vslo r,a,b vector signed short vector signed short vector unsigned char vslo r,a,b vector unsigned short vector unsigned short vector signed char vslo r,a,b vector unsigned short vector unsigned short vector unsigned char vslo r,a,b vector pixel vector pixel vector signed char vslo r,a,b vector pixel vector pixel vector unsigned char vslo r,a,b vector signed int vector signed int vector signed char vslo r,a,b vector signed int vector signed int vector unsigned char vslo r,a,b vector unsigned int vector unsigned int vector signed char vslo r,a,b vector unsigned int vector unsigned int vector unsigned char vslo r,a,b vector signed long long vector signed long long vector signed char vslo r,a,b vector signed long long vector signed long long vector unsigned char vslo r,a,b vector unsigned long long vector unsigned long long vector signed char vslo r,a,b vector unsigned long long vector unsigned long long vector unsigned char vslo r,a,b vector float vector float vector signed char vslo r,a,b vector float vector float vector unsigned char vslo r,a,b Vector Shift Left Variable r = vec_slv (a, b) Purpose: Left-shifts a vector by a varying number of bits by element. Result value: Let v be a 17-byte vector formed from a in bytes [0:15] and a zero byte in element 16. Then each byte element i of r is determined as follows. The start bit sb is obtained from bits 5:7 of byte element i of b. Then the contents of bits sb:sb+7 of the halfword in byte elements i:i+1 of v are placed into byte element i of r. An example follows: a 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F b 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F r 0F 1E 3C 78 F0 E1 C3 87 0F 1E 3C 78 F0 E1 C3 80 Endian considerations: All bit and byte element numbers are specified in big-endian order. This intrinsic is not endian-neutral. vslv vec_slv r a b Example Implementation Restrictions vector unsigned char vector unsigned char vector unsigned char vslv r,a,b ISA 3.0 or later Vector Splat r = vec_splat (a, b) Purpose: Returns a vector that has all of its elements set to a given value. Result value: The value of each element of r is the value of the element of a specified by b, which must be an element number less than the number of elements supported for a's type. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vspltb vec_splat xxspltw vec_splat xxpermdi vec_splat vsplth vec_splat r a b Example LE Implementation Example BE Implementation vector bool char vector bool char const int vspltb r,a,15-b vspltb r,a,b vector signed char vector signed char const int vspltb r,a,15-b vspltb r,a,b vector unsigned char vector unsigned char const int vspltb r,a,15-b vspltb r,a,b vector bool short vector bool short const int vsplth r,a,7-b vsplth r,a,b vector signed short vector signed short const int vsplth r,a,7-b vsplth r,a,b vector unsigned short vector unsigned short const int vsplth r,a,7-b vsplth r,a,b vector pixel vector pixel const int vsplth r,a,7-b vsplth r,a,b vector bool int vector bool int const int xxspltw r,a,3-b xxspltw r,a,b vector signed int vector signed int const int xxspltw r,a,3-b xxspltw r,a,b vector unsigned int vector unsigned int const int xxspltw r,a,3-b xxspltw r,a,b vector bool long long vector bool long long const int xxpermdi r,a,a,(1-b)*3 xxpermdi r,a,a,b vector signed long long vector signed long long const int xxpermdi r,a,a,(1-b)*3 xxpermdi r,a,a,b vector unsigned long long vector unsigned long long const int xxpermdi r,a,a,(1-b)*3 xxpermdi r,a,a,b vector float vector float const int xxspltw r,a,3-b xxspltw r,a,b vector double vector double const int xxpermdi r,a,a,(1-b)*3 xxpermdi r,a,a,b Vector Splat to Signed Byte r = vec_splat_s8 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: Each element of r is given the sign-extended 5-bit value of a. The range of this value is [-16:15]. Endian considerations: None. vspltisb vec_splat_s8 r a Example Implementation vector signed char 5-bit signed literal vspltisb r,a Vector Splat to Signed Halfword r = vec_splat_s16 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: Each element of r is given the sign-extended 5-bit value of a. The range of this value is [-16:15]. Endian considerations: None. vspltish vec_splat_s16 r a Example Implementation vector signed short 5-bit signed literal vspltish r,a Vector Splat to Signed Word r = vec_splat_s32 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: Each element of r is given the sign-extended 5-bit value of a. The range of this value is [-16:15]. Endian considerations: None. vspltisw vec_splat_s32 r a Example Implementation vector signed int 5-bit signed literal vspltisw r,a Vector Splat to Unsigned Byte r = vec_splat_u8 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: The 5-bit signed value of a is sign-extended to a byte and the resulting value is cast to an unsigned char. This value is placed in each element of r. The range of the original value is [-16:15]. Endian considerations: None. vspltisb vec_splat_u8 r a Example Implementation vector unsigned char 5-bit signed literal vspltisb r,a Vector Splat to Unsigned Halfword r = vec_splat_u16 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: The 5-bit signed value of a is sign-extended to a halfword and the resulting value is cast to an unsigned short. This value is placed in each element of r. The range of the original value is [-16:15]. Endian considerations: None. vspltish vec_splat_u16 r a Example Implementation vector unsigned short 5-bit signed literal vspltish r,a Vector Splat to Unsigned Word r = vec_splat_u32 (a) Purpose: Returns a vector with all elements equal to the given value. Result value: The 5-bit signed value of a is sign-extended to a word and the resulting value is cast to an unsigned int. This value is placed in each element of r. The range of the original value is [-16:15]. Endian considerations: None. vspltisw vec_splat_u32 r a Example Implementation vector unsigned int 5-bit signed literal vspltisw r,a Vector Splat Scalar r = vec_splats (a) Purpose: Returns a vector with the value of each element set to the value of the scalar input parameter. Result value: Each element of r is set to the value of a. Endian considerations: None. rlwinm vec_splats mtvsrd vec_splats vspltb vec_splats mtvsrwz vec_splats xxspltw vec_splats xxpermdi vec_splats vsplth vec_splats xxscvdpspn vec_splats r a Example Implementation vector signed char signed char rlwinm t,a,0,0xff mtvsrd u,t vspltb r,u,7 vector unsigned char unsigned char rlwinm t,a,0,0xff mtvsrd u,t vspltb r,u,7 vector signed short signed short rlwinm t,a,0,0xffff mtvsrd u,t vsplth r,u,3 vector unsigned short unsigned short rlwinm t,a,0,0xffff mtvsrd u,t vsplth r,u,3 vector signed int signed int mtvsrd t,a vspltb r,t,7 vector unsigned int unsigned int mtvsrd t,a vspltb r,t,7 vector signed long long signed long long mtvsrd t,a xxpermdi r,t,t,0 vector unsigned long long unsigned long long mtvsrd t,a xxpermdi r,t,t,0 vector signed __int128 signed __int128 mtvsrwz t,a xxspltw r,t,1 vector unsigned __int128 unsigned __int128 mtvsrwz t,a xxspltw r,t,1 vector float float xxscvdpspn t,a xxspltw r,t,0 vector double double xxpermdi r,a,a,0 Vector Square Root r = vec_sqrt (a) Purpose: Returns a vector containing the square root of each element in the source vector. Result value: Each element of r is the square root of the corresponding element of a. Endian considerations: None. xvsqrtdp vec_sqrt xvsqrtsp vec_sqrt r a Example Implementation vector float vector float xvsqrtsp r,a vector double vector double xvsqrtdp r,a Vector Shift Right r = vec_sr (a, b) Purpose: Performs a logical right shift for each element of a vector. Result value: Each element of r is the result of logically right-shifting the corresponding element of a by the number of bits specified by the corresponding element of b, modulo the number of bits in the element. Zeros are shifted in from the left. Endian considerations: None. vsrb vec_sr vsrw vec_sr vsrd vec_sr vsrh vec_sr r a b Example Implementation vector signed char vector signed char vector unsigned char vsrb r,a,b vector unsigned char vector unsigned char vector unsigned char vsrb r,a,b vector signed short vector signed short vector unsigned short vsrh r,a,b vector unsigned short vector unsigned short vector unsigned short vsrh r,a,b vector signed int vector signed int vector unsigned int vsrw r,a,b vector unsigned int vector unsigned int vector unsigned int vsrw r,a,b vector signed long long vector signed long long vector unsigned long long vsrd r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vsrd r,a,b Vector Shift Right Algebraic r = vec_sra (a, b) Purpose: Performs an algebraic right shift for each element of a vector. Result value: Each element of r is the result of algebraically right-shifting the corresponding element of a by the number of bits specified by the corresponding element of b, modulo the number of bits in the element. Copies of the sign bit are shifted in from the left. Endian considerations: None. vsrab vec_sra vsraw vec_sra vsrad vec_sra vsrah vec_sra r a b Example Implementation vector signed char vector signed char vector unsigned char vsrab r,a,b vector unsigned char vector unsigned char vector unsigned char vsrab r,a,b vector signed short vector signed short vector unsigned short vsrah r,a,b vector unsigned short vector unsigned short vector unsigned short vsrah r,a,b vector signed int vector signed int vector unsigned int vsraw r,a,b vector unsigned int vector unsigned int vector unsigned int vsraw r,a,b vector signed long long vector signed long long vector unsigned long long vsrad r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vsrad r,a,b Vector Shift Right Long r = vec_srl (a, b) Purpose: Right shifts a vector by a given number of bits. Result value: Vector r contains the contents of a, shifted right by the number of bits specified by the 3 least-significant bits of b. Zeros are supplied on the left. The shift count must have been replicated into all bytes of b; if not, the value of r is undefined. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_srl in big-endian code must be rewritten for little-endian targets. vsr vec_srl r a b Example Implementation vector signed char vector signed char vector unsigned char vsr r,a,b vector unsigned char vector unsigned char vector unsigned char vsr r,a,b vector signed short vector signed short vector unsigned char vsr r,a,b vector unsigned short vector unsigned short vector unsigned char vsr r,a,b vector pixel vector pixel vector unsigned char vsr r,a,b vector signed int vector signed int vector unsigned char vsr r,a,b vector unsigned int vector unsigned int vector unsigned char vsr r,a,b vector signed long long vector signed long long vector unsigned char vsr r,a,b vector unsigned long long vector unsigned long long vector unsigned char vsr r,a,b Vector Shift Right by Octets r = vec_sro (a, b) Purpose: Right shifts a vector by a given number of bytes (octets). Result value: Vector r receives the contents of a, shifted right by the number of bytes specified by bits 1–4 of the least-significant byte of b. Zeros are supplied from the left. Endian considerations: This intrinsic is not endian-neutral, so uses of vec_sro in big-endian code must be rewritten for little-endian targets. The shift count is in element 15 of b for big-endian, but in element 0 of b for little-endian. See also . vsro vec_sro r a b Example Implementation vector signed char vector signed char vector signed char vsro r,a,b vector signed char vector signed char vector unsigned char vsro r,a,b vector unsigned char vector unsigned char vector signed char vsro r,a,b vector unsigned char vector unsigned char vector unsigned char vsro r,a,b vector signed short vector signed short vector signed char vsro r,a,b vector signed short vector signed short vector unsigned char vsro r,a,b vector unsigned short vector unsigned short vector signed char vsro r,a,b vector unsigned short vector unsigned short vector unsigned char vsro r,a,b vector pixel vector pixel vector signed char vsro r,a,b vector pixel vector pixel vector unsigned char vsro r,a,b vector signed int vector signed int vector signed char vsro r,a,b vector signed int vector signed int vector unsigned char vsro r,a,b vector unsigned int vector unsigned int vector signed char vsro r,a,b vector unsigned int vector unsigned int vector unsigned char vsro r,a,b vector signed long long vector signed long long vector signed char vsro r,a,b vector signed long long vector signed long long vector unsigned char vsro r,a,b vector unsigned long long vector unsigned long long vector signed char vsro r,a,b vector unsigned long long vector unsigned long long vector unsigned char vsro r,a,b vector float vector float vector signed char vsro r,a,b vector float vector float vector unsigned char vsro r,a,b Vector Shift Right Variable r = vec_srv (a, b) Purpose: Right-shifts a vector by a varying number of bits by element. Result value: Let v be a 17-byte vector formed from a zero byte in element 0 and the elements of a in bytes [1:16]. Then each byte element i of r is determined as follows. The start bit sb is obtained from bits 5:7 of byte element i of b. Then the contents of bits (8 – sb):(15 – sb) of the halfword in byte elements i:i+1 of v are placed into byte element i of r. An example follows: a 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F 0F b 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01 00 r 00 3C 78 F0 E1 C3 87 0F 1E 3C 78 F0 E1 C3 87 0F Endian considerations: All bit and byte element numbers are specified in big-endian order. This intrinsic is not endian-neutral. vsrv vec_srv r a b Example Implementation Restrictions vector unsigned char vector unsigned char vector unsigned char vsrv r,a,b ISA 3.0 or later Vector Store Indexed vec_st (a, b, c) Purpose: Stores a 16-byte vector into memory at the address specified by a displacement and a pointer, ignoring the four low-order bits of the calculated address. Operation: A memory address is obtained by adding b and c, and masking off the four low-order bits of the result. The 16-byte vector in a is stored to the resultant memory address. Endian considerations: None. stvx vec_st a b c Example ISA 3.0 Implementation vector bool char signed long long vector bool char * stvx r,b,a vector bool char signed long long signed char * stvx r,b,a vector bool char signed long long unsigned char * stvx r,b,a vector signed char signed long long signed char * stvx r,b,a vector signed char signed long long vector signed char * stvx r,b,a vector unsigned char signed long long unsigned char * stvx r,b,a vector unsigned char signed long long vector unsigned char * stvx r,b,a vector bool short signed long long vector bool short * stvx r,b,a vector bool short signed long long signed short * stvx r,b,a vector bool short signed long long unsigned short * stvx r,b,a vector signed short signed long long signed short * stvx r,b,a vector signed short signed long long vector signed short * stvx r,b,a vector unsigned short signed long long unsigned short * stvx r,b,a vector unsigned short signed long long vector unsigned short * stvx r,b,a vector pixel signed long long vector pixel * stvx r,b,a vector bool int signed long long vector bool int * stvx r,b,a vector bool int signed long long signed int * stvx r,b,a vector bool int signed long long unsigned int * stvx r,b,a vector signed int signed long long signed int * stvx r,b,a vector signed int signed long long vector signed int * stvx r,b,a vector unsigned int signed long long unsigned int * stvx r,b,a vector unsigned int signed long long vector unsigned int * stvx r,b,a vector bool long long signed long long vector bool long long * stvx r,b,a vector signed long long signed long long signed long long * stvx r,b,a vector signed long long signed long long vector signed long long * stvx r,b,a vector unsigned long long signed long long unsigned long long * stvx r,b,a vector unsigned long long signed long long vector unsigned long long * stvx r,b,a vector float signed long long float * stvx r,b,a vector float signed long long vector float * stvx r,b,a vector double signed long long double * stvx r,b,a vector double signed long long vector double * stvx r,b,a Vector Store Element Indexed vec_ste (a, b, c) Purpose: Stores a single element from a 16-byte vector into memory at the address specified by a displacement and a pointer, aligned to the element size. Operation: The integer value b is added to the pointer value c. The resulting address is rounded down to the nearest address that is a multiple of es, where es is 1 for char pointers, 2 for short pointers, and 4 for float or int pointers. An element offset eo is calculated by taking the resultant address modulo 16. The vector element of a at offset eo is stored to the resultant address. Endian considerations: None. Notes: Be careful to note that the address (b+c) is aligned to an element boundary. Do not attempt to store unaligned data with this intrinsic. stvebx vec_ste stvewx vec_ste stvehx vec_ste a b c Example ISA 3.0 Implementation vector bool char signed long long signed char * stvebx r,b,a vector bool char signed long long unsigned char * stvebx r,b,a vector signed char signed long long signed char * stvebx r,b,a vector unsigned char signed long long unsigned char * stvebx r,b,a vector bool short signed long long signed short * stvehx r,b,a vector bool short signed long long unsigned short * stvehx r,b,a vector signed short signed long long signed short * stvehx r,b,a vector unsigned short signed long long unsigned short * stvehx r,b,a vector pixel signed long long unsigned short * stvehx r,b,a vector bool int signed long long signed int * stvewx r,b,a vector bool int signed long long unsigned int * stvewx r,b,a vector signed int signed long long signed int * stvewx r,b,a vector unsigned int signed long long unsigned int * stvewx r,b,a vector float signed long long float * stvewx r,b,a Vector Store Indexed Least Recently Used vec_stl (a, b, c) Purpose: Stores a 16-byte vector into memory at the address specified by a displacement and a pointer, ignoring the four low-order bits of the calculated address, and marking the cache line containing the address as least frequently used. Operation: A memory address is obtained by adding b and c, and masking off the four low-order bits of the result. The 16-byte vector in a is stored to the resultant memory address, and the containing cache line is marked as least frequently used. Endian considerations: None. Notes: This intrinsic can be used to indicate the last access to a portion of memory, as a hint to the data cache controller that the associated cache line can be replaced without performance loss. stvxl vec_stl a b c Example ISA 3.0 Implementation vector bool char signed long long vector bool char * stvxl r,b,a vector bool char signed long long signed char * stvxl r,b,a vector bool char signed long long unsigned char * stvxl r,b,a vector signed char signed long long signed char * stvxl r,b,a vector signed char signed long long vector signed char * stvxl r,b,a vector unsigned char signed long long unsigned char * stvxl r,b,a vector unsigned char signed long long vector unsigned char * stvxl r,b,a vector bool short signed long long vector bool short * stvxl r,b,a vector bool short signed long long signed short * stvxl r,b,a vector bool short signed long long unsigned short * stvxl r,b,a vector signed short signed long long signed short * stvxl r,b,a vector signed short signed long long vector signed short * stvxl r,b,a vector unsigned short signed long long unsigned short * stvxl r,b,a vector unsigned short signed long long vector unsigned short * stvxl r,b,a vector pixel signed long long vector pixel * stvxl r,b,a vector bool int signed long long vector bool int * stvxl r,b,a vector bool int signed long long signed int * stvxl r,b,a vector bool int signed long long unsigned int * stvxl r,b,a vector signed int signed long long signed int * stvxl r,b,a vector signed int signed long long vector signed int * stvxl r,b,a vector unsigned int signed long long unsigned int * stvxl r,b,a vector unsigned int signed long long vector unsigned int * stvxl r,b,a vector bool long long signed long long vector bool long long * stvxl r,b,a vector signed long long signed long long signed long long * stvxl r,b,a vector signed long long signed long long vector signed long long * stvxl r,b,a vector unsigned long long signed long long unsigned long long * stvxl r,b,a vector unsigned long long signed long long vector unsigned long long * stvxl r,b,a vector float signed long long float * stvxl r,b,a vector float signed long long vector float * stvxl r,b,a vector double signed long long double * stvxl r,b,a vector double signed long long vector double * stvxl r,b,a Vector Subtract r = vec_sub (a, b) Purpose: Returns a vector containing the result of subtracting each element of one source vector from the corresponding element of another source vector. Result value: The value of each element of r is the result of subtracting the value of the corresponding element of b from the value of the corresponding element of a. The arithmetic is modular for integer vectors. Endian considerations: None. vsububm vec_sub vsubuwm vec_sub vsubuqm vec_sub vsubudm vec_sub vsubuhm vec_sub xvsubdp vec_sub xvsubsp vec_sub r a b Example Implementation vector signed char vector signed char vector signed char vsububm r,a,b vector unsigned char vector unsigned char vector unsigned char vsububm r,a,b vector signed short vector signed short vector signed short vsubuhm r,a,b vector unsigned short vector unsigned short vector unsigned short vsubuhm r,a,b vector signed int vector signed int vector signed int vsubuwm r,a,b vector unsigned int vector unsigned int vector unsigned int vsubuwm r,a,b vector signed long long vector signed long long vector signed long long vsubudm r,a,b vector unsigned long long vector unsigned long long vector unsigned long long vsubudm r,a,b vector signed __int128 vector signed __int128 vector signed __int128 vsubuqm r,a,b vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vsubuqm r,a,b vector float vector float vector float xvsubsp r,a,b vector double vector double vector double xvsubdp r,a,b Vector Subtract Carryout r = vec_subc (a, b) Purpose: Returns a vector wherein each element contains the carry produced by subtracting the corresponding elements of the two source vectors. Result value: The value of each element of r is the complement of the carry produced by subtracting the value of the corresponding element of b from the value of the corresponding element of a. The value is 0 if a borrow occurred, or 1 if no borrow occurred. Endian considerations: None. vsubcuw vec_subc vsubcuq vec_subc r a b Example Implementation vector signed int vector signed int vector signed int vsubcuw r,a,b vector unsigned int vector unsigned int vector unsigned int vsubcuw r,a,b vector signed __int128 vector signed __int128 vector signed __int128 vsubcuq r,a,b vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vsubcuq r,a,b Vector Subtract Extended r = vec_sube (a, b, c) Purpose: Returns a vector containing the result of first elementwise subtracting one vector from another vector, and then elementwise adding a third carry vector. Elements of the carry vector have a value of 0 or 1. Result value: Let c' be a vector for which each element is 0 if the rightmost bit of the corresponding element of c is 0, and 1 otherwise. Then the value of each element of r is produced by subtracting the corresponding element of b from the corresponding element of a, and then adding the corresponding element of c'. Endian considerations: None. Notes: Code generated for this intrinsic should ensure only the low-order bit of c participates in the sum. vspltisw vec_sube vsubuwm vec_sube xxland vec_sube vsubeuqm vec_sube r a b c Example Implementation vector signed int vector signed int vector signed int vector signed int vspltisw t,1 vsubuwm u,a,b xxland v,c,t vsubuwm r,u,v vector unsigned int vector unsigned int vector unsigned int vector unsigned int vspltisw t,1 vsubuwm u,a,b xxland v,c,t vsubuwm r,u,v vector signed __int128 vector signed __int128 vector signed __int128 vector signed __int128 vsubeuqm r,a,b,c vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vsubeuqm r,a,b,c Vector Subtract Extended Carryout r = vec_subec (a, b, c) Purpose: Returns a vector containing the carries produced by subtracting one vector from another, then adding a third vector to the difference. The third vector is a carry vector, with each element having a value of 0 or 1. Result value: The value of each element of r is the carry produced by subtracting the corresponding element of b from the corresponding element of a, and then adding the carry specified in the corresponding element of c (1 if there is a carry, 0 otherwise). Endian considerations: None. Notes: Code generated for this intrinsic should ensure only the low-order bit of c participates in the sum. vspltisw vec_subec xxland vec_subec vsubuwm vec_subec vsubcuw vec_subec xxlor vec_subec vsubecuq vec_subec r a b c Example Implementation vector signed int vector signed int vector signed int vector signed int vspltisw t,1 xxland u,c,t vsubuwm v,a,b vsubcuw w,a,b vsubcuw x,v,u xxlor r,w,x vector unsigned int vector unsigned int vector unsigned int vector unsigned int vspltisw t,1 xxland u,c,t vsubuwm v,a,b vsubcuw w,a,b vsubcuw x,v,u xxlor r,w,x vector signed __int128 vector signed __int128 vector signed __int128 vector signed __int128 vsubecuq r,a,b,c vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vector unsigned __int128 vsubecuq r,a,b,c Vector Subtract Saturated r = vec_subs (a, b) Purpose: Returns a vector containing the saturated differences of each set of corresponding elements of the source vectors. Result value: The value of each element of r is the saturated result of subtracting the value of the corresponding element of b from the value of the corresponding element of a. Endian considerations: None. vsubsbs vec_subs vsububs vec_subs vsubsws vec_subs vsubuws vec_subs vsubshs vec_subs vsubuhs vec_subs r a b Example Implementation vector signed char vector signed char vector signed char vsubsbs r,a,b vector unsigned char vector unsigned char vector unsigned char vsububs r,a,b vector signed short vector signed short vector signed short vsubshs r,a,b vector unsigned short vector unsigned short vector unsigned short vsubuhs r,a,b vector signed int vector signed int vector signed int vsubsws r,a,b vector unsigned int vector unsigned int vector unsigned int vsubuws r,a,b Vector Sum Across Half r = vec_sum2s (a, b) Purpose: Returns a vector containing the results of performing a sum-across operation within each doubleword of the first source vector together with accumulated results in the second source vector. Result value: Elements 0 and 2 of r are 0. Element 1 of r contains the saturated sum of elements 0 and 1 of a and element 1 of b. Element 3 of r contains the saturated sum of elements 2 and 3 of a and element 3 of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vsldoi vec_sum2s vsum2sws vec_sum2s r a b Example LE Implementation Example BE Implementation vector signed int vector signed int vector signed int vsldoi t,b,b,12 vsum2sws u,a,t vsldoi r,u,u,4 vsum2sws r,a,b Vector Sum Across Quarter r = vec_sum4s (a, b) Purpose: Returns a vector containing the results of performing a sum-across operation within each word of the first source vector together with accumulated results in the second source vector. Result value: There are two cases: a is a vector of signed or unsigned char. For each element n of the result vector, the value is obtained by adding elements 4n through 4n + 3 of a and element n of b using saturated addition. a is a vector of signed short. For each element n of the result vector, the value is obtained by adding elements 2n and 2n + 1 of a and element n of b using saturated addition. Endian considerations: None. vsum4sbs vec_sum4s vsum4shs vec_sum4s vsum4ubs vec_sum4s r a b Example Implementation vector signed int vector signed char vector signed int vsum4sbs r,a,b vector unsigned int vector unsigned char vector unsigned int vsum4ubs r,a,b vector signed int vector signed short vector signed int vsum4shs r,a,b Vector Sum Across r = vec_sums (a, b) Purpose: Returns a vector containing the results of performing a sum-across operation on the first source vector together with accumulated results in the second source vector. Result value: Elements 0, 1, and 2 of r are 0. Element 3 is the saturated sum of all the elements of a and element 3 of b. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. vspltw vec_sums vsumsws vec_sums vsldoi vec_sums r a b Example LE Implementation Example BE Implementation vector signed int vector signed int vector signed int vspltw t,b,0 vsumsws u,a,t vsldoi r,u,u,12 vsumsws r,a,b Vector Test Data Class r = vec_test_data_class (a, b) Purpose: Determines the data class for each floating-point element. Result value: Each element of r is set to all ones if the corresponding element of a matches one of the possible data types selected by b. If not, the element is set to all zeros. b can select one of the following data classes, or more than one of them by ORing the constants together. Not a number (NaN) 64 Positive infinity 32 Negative infinity 16 Positive zero 8 Negative zero 4 Positive subnormal 2 Negative subnormal 1 For clarity of code, the following named constants are suggested. Preferably, compilers will provide these constants in a header file, but this is not required for compliance. #define __VEC_CLASS_FP_NAN (1<<6) #define __VEC_CLASS_FP_INFINITY_P (1<<5) #define __VEC_CLASS_FP_INFINITY_N (1<<4) #define __VEC_CLASS_FP_ZERO_P (1<<3) #define __VEC_CLASS_FP_ZERO_N (1<<2) #define __VEC_CLASS_FP_SUBNORMAL_P (1<<1) #define __VEC_CLASS_FP_SUBNORMAL_N (1<<0) #define __VEC_CLASS_FP_INFINITY (__VEC_CLASS_FP_INFINITY_P | __VEC_CLASS_FP_INFINITY_N) #define __VEC_CLASS_FP_ZERO (__VEC_CLASS_FP_ZERO_P | __VEC_CLASS_FP_ZERO_N) #define __VEC_CLASS_FP_SUBNORMAL (__VEC_CLASS_FP_SUBNORMAL_P | __VEC_CLASS_FP_SUBNORMAL_N) #define __VEC_CLASS_FP_NOT_NORMAL (__VEC_CLASS_FP_NAN | __VEC_CLASS_FP_SUBNORMAL | __VEC_CLASS_FP_ZERO | __VEC_CLASS_FP_INFINITY) Endian considerations: None. xvtstdcsp vec_test_data_class xvtstdcdp vec_test_data_class r a b Example Implementation Restrictions vector bool int vector float 7-bit unsigned literal xvtstdcsp r,a,b ISA 3.0 or later vector bool long long vector double 7-bit unsigned literal xvtstdcdp r,a,b ISA 3.0 or later Vector Truncate r = vec_trunc (a) Purpose: Returns a vector containing the truncated values of the corresponding elements of the source vector. Result value: Each element of r contains the value of the corresponding element of a, truncated to an integral value. Endian considerations: None. xvrdpiz vec_trunc xvrspiz vec_trunc r a Example Implementation vector float vector float xvrspiz r,a vector double vector double xvrdpiz r,a Vector Unpack High r = vec_unpackh (a) Purpose: Unpacks the most-significant (“high”) half of a vector into a vector with larger elements. Result value: If a is an integer vector, the value of each element of r is the value of the corresponding element of the most-significant half of a. If a is a floating-point vector, the value of each element of r is the value of the corresponding element of the most-significant half of a, widened to the result precision. If a is a pixel vector, the value of each element of r is taken from the corresponding element of the most-significant half of a as follows: All bits in the first byte of the element of r are set to the value of the first bit of the element of a. The least-significant 5 bits of the second byte of the element of r are set to the value of the next 5 bits in the element of a. The least-significant 5 bits of the third byte of the element of r are set to the value of the next 5 bits in the element of a. The least-significant 5 bits of the fourth byte of the element of r are set to the value of the next 5 bits in the element of a. Endian considerations: The "high" half of a vector with n elements is the first n/2 elements of the vector. For little endian, these elements are in the rightmost half of the vector. For big endian, these elements are in the leftmost half of the vector. vupklsh vec_unpackh vupkhsh vec_unpackh vupklpx vec_unpackh vupkhpx vec_unpackh vupklsw vec_unpackh vupkhsw vec_unpackh vupklsb vec_unpackh vupkhsb vec_unpackh xxsldwi vec_unpackh xvcvspdp vec_unpackh r a Example LE Implementation Example BE Implementation vector bool short vector bool char vupklsb r,a vupkhsb r,a vector signed short vector signed char vupklsb r,a vupkhsb r,a vector bool int vector bool short vupklsh r,a vupkhsh r,a vector signed int vector signed short vupklsh r,a vupkhsh r,a vector unsigned int vector pixel vupklpx r,a vupkhpx r,a vector bool long long vector bool int vupklsw r,a vupkhsw r,a vector signed long long vector signed int vupklsw r,a vupkhsw r,a vector double vector float xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvspdp r,u xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvspdp r,u Vector Unpack Low r = vec_unpackl (a) Purpose: Unpacks the least-significant (“low”) half of a vector into a vector with larger elements. Result value: If a is an integer vector, the value of each element of r is the value of the corresponding element of the least-significant half of a. If a is a floating-point vector, the value of each element of r is the value of the corresponding element of the least-significant half of a, widened to the result precision. If a is a pixel vector, the value of each element of r is taken from the corresponding element of the least-significant half of a as follows: All bits in the first byte of the element of r are set to the value of the first bit of the element of a. The least-significant 5 bits of the second byte of the element of r are set to the value of the next 5 bits in the element of a. The least-significant 5 bits of the third byte of the element of r are set to the value of the next 5 bits in the element of a. The least-significant 5 bits of the fourth byte of the element of r are set to the value of the next 5 bits in the element of a. Endian considerations: The "high" half of a vector with n elements is the first n/2 elements of the vector. For little endian, these elements are in the rightmost half of the vector. For big endian, these elements are in the leftmost half of the vector. vupkhsh vec_unpackl vupklsh vec_unpackl vupkhpx vec_unpackl vupklpx vec_unpackl vupkhsw vec_unpackl vupklsw vec_unpackl vupkhsb vec_unpackl vupklsb vec_unpackl xxsldwi vec_unpackl xvcvspdp vec_unpackl r ARG1 Example LE Implementation Example BE Implementation vector bool short vector bool char vupkhsb r,a vupklsb r,a vector signed short vector signed char vupkhsb r,a vupklsb r,a vector bool int vector bool short vupkhsh r,a vupklsh r,a vector signed int vector signed short vupkhsh r,a vupklsh r,a vector unsigned int vector pixel vupkhpx r,a vupklpx r,a vector bool long long vector bool int vupkhsw r,a vupklsw r,a vector signed long long vector signed int vupkhsw r,a vupklsw r,a vector double vector float xxsldwi t,a,a,1 xxsldwi u,t,a,3 xvcvspdp r,u xxsldwi t,a,a,3 xxsldwi u,a,t,2 xvcvspdp r,u Vector Convert Floating-Point to Unsigned Integer r = vec_unsigned (a) Purpose: Converts a vector of floating-point numbers to a vector of unsigned integers. Result value: Each element of r is obtained by truncating the corresponding element of a to an unsigned integer. The current floating-point rounding mode is ignored. Endian considerations: None. xvcvspsxws vec_unsigned xvcvdpsxds vec_unsigned r a Example Implementation vector unsigned int vector float xvcvspsxws r,a vector unsigned long long vector double xvcvdpsxds r,a Vector Convert Double-Precision to Unsigned Word r = vec_unsigned2 (a, b) Purpose: Converts two vectors of double-precision floating-point numbers to a vector of unsigned 32-bit integers. Result value: Let v be the concatenation of a and b. Each element of r is obtained by truncating the corresponding element of v to an unsigned 32-bit integer. The current floating-point rounding mode is ignored. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xxpermdi vec_unsigned2 xvcvdpuxws vec_unsigned2 vmrgow vec_unsigned2 vmrgew vec_unsigned2 r a b Example LE Implementation Example BE Implementation vector unsigned int vector double vector double xxpermdi t,b,a,3 xxpermdi u,b,a,0 xvcvdpuxws v,t xvcvdpuxws w,u vmrgow r,w,v xxpermdi t,a,b,3 xxpermdi u,a,b,0 xvcvdpuxws v,t xvcvdpuxws w,u vmrgew r,v,w Vector Convert Double-Precision to Unsigned Word Even r = vec_unsignede (a) Purpose: Converts elements of the source vector to unsigned integers and stores them in the even-numbered elements of the result vector. Result value: Element 0 of r contains element 0 of a, truncated to an unsigned integer. Element 2 of r contains element 1 of a, truncated to a signed integer. Elements 1 and 3 of r are undefined. Truncation of a negative number to an unsigned integer results in a value of zero. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvdpuxws vec_unsignede vsldoi vec_unsignede r a Example LE Implementation Example BE Implementation vector unsigned int vector double xvcvdpuxws t,a vsldoi r,t,t,12 xvcvdpuxws r,a Vector Convert Double-Precision to Unsigned Word Odd r = vec_unsignedo (a) Purpose: Converts elements of the source vector to unsigned integers and stores them in the odd-numbered elements of the result vector. Result value: Element 1 of r contains element 0 of a, truncated to an unsigned integer. Element 3 of r contains element 1 of a, truncated to an unsigned integer. Elements 0 and 2 of r are undefined. Truncation of a negative number to an unsigned integer results in a value of zero. Endian considerations: The element numbering within a register is left-to-right for big-endian targets, and right-to-left for little-endian targets. xvcvdpuxws vec_unsignedo vsldoi vec_unsignedo r a Example LE Implementation Example BE Implementation vector unsigned int vector double xvcvdpuxws r,a xvcvdpuxws t,a vsldoi r,t,t,12 VSX Unaligned Load r = vec_xl (a, b) Purpose: Loads a 16-byte vector from the memory address specified by the displacement and the pointer. Result value: The value of r is obtained by adding a and b, then loading the 16-byte vector from the resultant memory address. Endian considerations: For ISA 2.07, there is no bi-endian unaligned load instruction. For little-endian targets, it is necessary to use the lxvd2x instruction and swap the doublewords with an xxswapd instruction. For big-endian targets, the lxvd2x instruction or lxvw4x instruction suffices. The examples below assume ISA 3.0, where the bi-endian lxv instruction is available. Notes: For languages that support built-in methods for pointer dereferencing, such as the C/C++ * and [ ] operators, use of the native operators is encouraged when the memory to be accessed is aligned on a 32-bit boundary or aligned to the type of b, whichever is weaker. GCC provides a commonly used synonym for vec_xl called vec_vsx_ld. Although these have the same behavior, only vec_xl is guaranteed to be portable across compliant compilers. Therefore vec_xl is preferred. lxv vec_xl r a b Example ISA 3.0 Implementation vector signed char signed long long signed char * lxv r,a(b) vector unsigned char signed long long unsigned char * lxv r,a(b) vector signed short signed long long signed short * lxv r,a(b) vector unsigned short signed long long unsigned short * lxv r,a(b) vector signed int signed long long signed int * lxv r,a(b) vector unsigned int signed long long unsigned int * lxv r,a(b) vector signed signed long long signed long long signed long long * lxv r,a(b) vector unsigned long long signed long long unsigned long long * lxv r,a(b) vector signed __int128 signed long long signed __int128 * lxv r,a(b) vector unsigned __int128 signed long long unsigned __int128 * lxv r,a(b) vector float signed long long float * lxv r,a(b) vector double signed long long double * lxv r,a(b) VSX Unaligned Load as Big Endian r = vec_xl_be (a, b) Purpose: Loads a vector from an address into a register in big-endian element order, regardless of the endianness of the target machine. Result value: The value of r is obtained by adding a and b, then loading the vector elements from the resulting address in big-endian order. Endian considerations: In big-endian mode, this acts just like the vec_xl intrinsic. In little-endian mode, the highest-numbered element of r is loaded from the lowest data address, and the lowest-numbered element of r from the highest data address. lxvb16x vec_xl_be lxv vec_xl_be lxvw4x vec_xl_be lxvd2x vec_xl_be lxvh8x vec_xl_be r a b Example ISA 3.0 LE Implementation Example ISA 3.0 BE Implementation vector signed char signed long long signed char * lxvb16x r,a,b lxv r,a,b vector unsigned char signed long long unsigned char * lxvb16x r,a,b lxv r,a,b vector signed short signed long long signed short * lxvh8x r,a,b lxv r,a,b vector unsigned short signed long long unsigned short * lxvh8x r,a,b lxv r,a,b vector signed int signed long long signed int * lxvw4x r,a,b lxv r,a,b vector unsigned int signed long long unsigned int * lxvw4x r,a,b lxv r,a,b vector signed long long signed long long signed long long * lxvd2x r,a,b lxv r,a,b vector unsigned long long signed long long unsigned long long * lxvd2x r,a,b lxv r,a,b vector signed __int128 signed long long signed __int128 * lxv r,a,b lxv r,a,b vector unsigned __int128 signed long long unsigned __int128 * lxv r,a,b lxv r,a,b vector float signed long long float * lxvw4x r,a,b lxv r,a,b vector double signed long long double * lxvd2x r,a,b lxv r,a,b Vector Load with Length r = vec_xl_len (a, b) Purpose: Loads a vector of a specified byte length. Result value: Loads the number of bytes specified by b from the address specified in a. Initializes elements in order from the byte stream (as defined by the endianness of the target). Any bytes of elements that cannot be initialized from the number of loaded bytes have a zero value. Between 0 and 16 bytes, inclusive, will be loaded. The length is specified by the least-significant byte of b, as min (b mod 256, 16). The behavior is undefined if the length argument is outside of the range 0–255, or if it is not a multiple of the vector element size. Endian considerations: None. Notes: vec_xl_len should not be used to load from cache-inhibited memory. sldi vec_xl_len lxvl vec_xl_len r a b Example Implementation Restrictions vector signed char signed char * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector unsigned char unsigned char * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector signed short signed short * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector unsigned short unsigned short * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector signed int signed int * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector unsigned int unsigned int * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector signed long long signed long long * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector unsigned long long unsigned long long * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector signed __int128 signed __int128 * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector unsigned __int128 unsigned __int128 * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector float float * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later vector double double * size_t sldi t,b,56 lxvl r,a,t ISA 3.0 or later Vector Load with Length Right-Justified r = vec_xl_len_r (a, b) Purpose: Loads a vector of a specified byte length, right-justified. Result value: Loads the number of bytes specified by b from the address specified in a, right justified in r. Initializes elements in order from the byte stream (as defined by the endianness of the target). Any bytes of elements that cannot be initialized from the number of loaded bytes have a zero value. Between 0 and 16 bytes, inclusive, will be loaded. The length is specified by the least-significant byte of b, as min (b mod 256, 16). The behavior is undefined if the length argument is outside of the range 0–255. Endian considerations: None. Notes: vec_xl_len_r should not be used to load from cache-inhibited memory. sldi vec_xl_len_r lvsl vec_xl_len_r lxvll vec_xl_len_r vperm vec_xl_len_r r a b Example Implementation Restrictions vector unsigned char unsigned char * size_t sldi t,b,56 lvsl u,0,b lxvll v,a,t vperm r,v,v,u ISA 3.0 or later Vector Exclusive OR r = vec_xor (a, b) Purpose: Performs a bitwise XOR of two vectors. Result value: v is the bitwise exclusive OR of a and b. Endian considerations: None. xxlxor vec_xor r a b Example Implementation vector bool char vector bool char vector bool char xxlxor r,a,b vector signed char vector signed char vector signed char xxlxor r,a,b vector unsigned char vector unsigned char vector unsigned char xxlxor r,a,b vector bool short vector bool short vector bool short xxlxor r,a,b vector signed short vector signed short vector signed short xxlxor r,a,b vector unsigned short vector unsigned short vector unsigned short xxlxor r,a,b vector bool int vector bool int vector bool int xxlxor r,a,b vector signed int vector signed int vector signed int xxlxor r,a,b vector unsigned int vector unsigned int vector unsigned int xxlxor r,a,b vector bool long long vector bool long long vector bool long long xxlxor r,a,b vector signed long long vector signed long long vector signed long long xxlxor r,a,b vector unsigned long long vector unsigned long long vector unsigned long long xxlxor r,a,b vector float vector float vector float xxlxor r,a,b vector double vector double vector double xxlxor r,a,b VSX Unaligned Store vec_xst (a, b, c) Purpose: Stores a 16-byte value into memory at the address specified by the displacement and pointer. Operation: The values of b and c are added, and the value of a is stored to the resultant address. Endian considerations: For ISA 2.07, there is no bi-endian unaligned store instruction. For little-endian targets, it is necessary to first swap the doublewords of the value to be stored using an xxswapd instruction, and then store the result using the stxvd2x instruction. For big-endian targets, the stxvd2x or stxvw4x instruction suffices. The examples below assume ISA 3.0, where the bi-endian stxv instruction is available. Notes: For languages that support built-in methods for pointer dereferencing, such as the C/C++ * and [ ] operators, use of the native operators is encouraged when the memory to be accessed is aligned on a 32-bit boundary or aligned to the type of b, whichever is weaker. GCC provides a commonly used synonym for vec_xst called vec_vsx_st. Although these have the same behavior, only vec_xst is guaranteed to be portable across compliant compilers. Therefore vec_xst is preferred. stxv vec_xst a b c Example ISA 3.0 Implementation vector signed char signed long long signed char * stxv a,b(c) vector unsigned char signed long long unsigned char * stxv a,b(c) vector signed short signed long long signed short * stxv a,b(c) vector unsigned short signed long long unsigned short * stxv a,b(c) vector signed int signed long long signed int * stxv a,b(c) vector unsigned int signed long long unsigned int * stxv a,b(c) vector signed long long signed long long signed long long * stxv a,b(c) vector unsigned long long signed long long unsigned long long * stxv a,b(c) vector signed __int128 signed long long signed __int128 * stxv a,b(c) vector unsigned __int128 signed long long unsigned __int128 * stxv a,b(c) vector float signed long long float * stxv a,b(c) vector double signed long long double * stxv a,b(c) VSX Unaligned Store as Big Endian vec_xst_be (a, b, c) Purpose: Stores a vector to an address using big-endian element order, regardless of the endianness of the target machine. Result value: The values of b and c are added, and the value of a is stored to the resultant address using big-endian element order. Endian considerations: In big-endian mode, this acts just like the vec_xst intrinsic. In little-endian mode, the lowest data address receives the highest-numbered element of a, and the highest data address receives the lowest-numbered element of a. stxvb16x vec_xst_be stxv vec_xst_be stxvw4x vec_xst_be stxvd2x vec_xst_be stxvh8x vec_xst_be a b c Example ISA 3.0 LE Implementation Example ISA 3.0 BE Implementation vector signed char signed long long signed char * stxvb16x a,b,c stxv a,b,c vector unsigned char signed long long unsigned char * stxvb16x a,b,c stxv a,b,c vector signed short signed long long signed short * stxvh8x a,b,c stxv a,b,c vector unsigned short signed long long unsigned short * stxvh8x a,b,c stxv a,b,c vector signed int signed long long signed int * stxvw4x a,b,c stxv a,b,c vector unsigned int signed long long unsigned int * stxvw4x a,b,c stxv a,b,c vector signed long long signed long long signed long long * stxvd2x a,b,c stxv a,b,c vector unsigned long long signed long long unsigned long long * stxvd2x a,b,c stxv a,b,c vector signed __int128 signed long long signed __int128 * stxv a,b,c stxv a,b,c vector unsigned __int128 signed long long unsigned __int128 * stxv a,b,c stxv a,b,c vector float signed long long float * stxvw4x a,b,c stxv a,b,c vector double signed long long double * stxvd2x a,b,c stxv a,b,c Vector Store with Length vec_xst_len (a, b, c) Purpose: Stores a vector of a specified byte length. Operation: Stores the number of bytes specified by c of the vector a to the address specified in b. The bytes are obtained starting from the lowest-numbered byte of the lowest-numbered element (as defined by the endianness of the target). All bytes of an element are accessed before proceeding to the next higher element. Between 0 and 16 bytes, inclusive, will be stored. The length is specified by the least-significant byte of c, as min (c mod 256, 16). The behavior is undefined if the length argument is outside of the range 0–255, or if it is not a multiple of the vector element size. Endian considerations: None. Notes: vec_xst_len should not be used to store to cache-inhibited memory. sldi vec_xst_len stxvl vec_xst_len a b c Example Implementation Restrictions vector signed char signed char * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector unsigned char unsigned char * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector signed short signed short * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector unsigned short unsigned short * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector signed int signed int * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector unsigned int unsigned int * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector signed long long signed long long * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector unsigned long long unsigned long long * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector signed __int128 signed __int128 * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector unsigned __int128 unsigned __int128 * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector float float * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later vector double double * size_t sldi t,c,56 stxvl a,b,t ISA 3.0 or later Vector Store with Length Right-Justified vec_xst_len_r (a, b, c) Purpose: Stores a right-justified vector of a specified byte length. Operation: Stores the number of bytes specified by c of the right-justified vector a to the address specified by b. Between 0 and 16 bytes, inclusive, will be stored. The length is specified by the least-significant byte of c, as min (b mod 256, 16). The behavior is undefined if the length argument is outside of the range 0–255. Endian considerations: None. Notes: vec_xst_len_r should not be used to store to cache-inhibited memory. lvsr vec_xst_len_r sldi vec_xst_len_r vperm vec_xst_len_r stxvll vec_xst_len_r a b c Example Implementation Restrictions vector unsigned char unsigned char * size_t lvsr t,0,c sldi u,c,56 vperm v,a,a,t stxvll v,b,u ISA 3.0 or later