library ieee ;
use ieee.std_logic_1164. all ;
use ieee.numeric_std. all ;
library work ;
use work.common. all ;
use work.decode_types. all ;
use work.insn_helpers. all ;
entity decode1 is
generic (
HAS_FPU : boolean : = true ;
-- Non-zero to enable log data collection
LOG_LENGTH : natural : = 0
) ;
port (
clk : in std_ulogic ;
rst : in std_ulogic ;
stall_in : in std_ulogic ;
flush_in : in std_ulogic ;
busy_out : out std_ulogic ;
flush_out : out std_ulogic ;
f_in : in IcacheToDecode1Type ;
f_out : out Decode1ToFetch1Type ;
d_out : out Decode1ToDecode2Type ;
r_out : out Decode1ToRegisterFileType ;
log_out : out std_ulogic_vector ( 12 downto 0 )
) ;
end entity decode1 ;
architecture behaviour of decode1 is
signal r , rin : Decode1ToDecode2Type ;
signal f , fin : Decode1ToFetch1Type ;
constant illegal_inst : decode_rom_t : =
( NONE , NONE , OP_ILLEGAL , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) ;
constant x_inst : decode_rom_t : =
( NONE , NONE , OP_ILLEGAL , NONE , NONE , NONE , NONE , 'X' , 'X' , 'X' , 'X' , ZERO , 'X' , NONE , 'X' , 'X' , 'X' , 'X' , 'X' , 'X' , NONE , 'X' , 'X' , NONE ) ;
-- If we have an FPU, then it is used for integer divisions,
-- otherwise a dedicated divider in the ALU is used.
function divider_unit ( hf : boolean ) return unit_t is
begin
if hf then
return FPU ;
else
return ALU ;
end if ;
end ;
constant DVU : unit_t : = divider_unit ( HAS_FPU ) ;
type reg_internal_t is record
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
maj_decode : decode_rom_t ;
row_decode : decode_rom_t ;
use_row : std_ulogic ;
override : std_ulogic ;
override_decode : decode_rom_t ;
end record ;
constant reg_internal_t_init : reg_internal_t : =
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
( maj_decode = > illegal_inst , row_decode = > illegal_inst , use_row = > '0' ,
override = > '0' , override_decode = > illegal_inst ) ;
signal ri , ri_in : reg_internal_t ;
type br_predictor_t is record
br_nia : std_ulogic_vector ( 61 downto 0 ) ;
br_offset : signed ( 23 downto 0 ) ;
predict : std_ulogic ;
end record ;
signal br , br_in : br_predictor_t ;
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
type decoder_rom_t is array ( 0 to 2047 ) of decode_rom_t ;
-- Indexed by bits 31-26 (major opcode) and 4-0 of instruction word
constant major_decode_rom : decoder_rom_t : = (
-- unit fac internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl rpt
-- op in out A out in out len ext pipe
2#001100_00000# to 2#001100_11111# = > ( ALU , NONE , OP_ADD , RA , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- addic
2#001101_00000# to 2#001101_11111# = > ( ALU , NONE , OP_ADD , RA , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- addic.
2#001110_00000# to 2#001110_11111# = > ( ALU , NONE , OP_ADD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- addi
2#001111_00000# to 2#001111_11111# = > ( ALU , NONE , OP_ADD , RA_OR_ZERO , CONST_SI_HI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- addis
2#010011_00100# to 2#010011_00101# = > ( ALU , NONE , OP_ADD , CIA , CONST_DXHI4 , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- addpcis
2#011100_00000# to 2#011100_11111# = > ( ALU , NONE , OP_AND , NONE , CONST_UI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- andi.
2#011101_00000# to 2#011101_11111# = > ( ALU , NONE , OP_AND , NONE , CONST_UI_HI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- andis.
2#000000_00000# to 2#000000_11111# = > ( ALU , NONE , OP_ATTN , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '1' , NONE ) , -- attn
2#010010_00000# to 2#010010_11111# = > ( ALU , NONE , OP_B , NONE , CONST_LI , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '1' , '0' , NONE ) , -- b
2#010000_00000# to 2#010000_11111# = > ( ALU , NONE , OP_BC , NONE , CONST_BD , NONE , NONE , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '1' , '0' , NONE ) , -- bc
2#001011_00000# to 2#001011_11111# = > ( ALU , NONE , OP_CMP , RA , CONST_SI , NONE , NONE , '0' , '1' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- cmpi
2#001010_00000# to 2#001010_11111# = > ( ALU , NONE , OP_CMP , RA , CONST_UI , NONE , NONE , '0' , '1' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cmpli
2#100010_00000# to 2#100010_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lbz
2#100011_00000# to 2#100011_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lbzu
2#110010_00000# to 2#110010_11111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lfd
2#110011_00000# to 2#110011_11111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lfdu
2#110000_00000# to 2#110000_11111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- lfs
2#110001_00000# to 2#110001_11111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '1' , '0' , NONE , '0' , '0' , DUPD ) , -- lfsu
2#101010_00000# to 2#101010_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lha
2#101011_00000# to 2#101011_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '1' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lhau
2#101000_00000# to 2#101000_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lhz
2#101001_00000# to 2#101001_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lhzu
2#100000_00000# to 2#100000_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwz
2#100001_00000# to 2#100001_11111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lwzu
2#000111_00000# to 2#000111_11111# = > ( ALU , NONE , OP_MUL_L64 , RA , CONST_SI , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- mulli
2#011000_00000# to 2#011000_11111# = > ( ALU , NONE , OP_OR , NONE , CONST_UI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ori
2#011001_00000# to 2#011001_11111# = > ( ALU , NONE , OP_OR , NONE , CONST_UI_HI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- oris
2#010100_00000# to 2#010100_11111# = > ( ALU , NONE , OP_RLC , RA , CONST_SH32 , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- rlwimi
2#010101_00000# to 2#010101_11111# = > ( ALU , NONE , OP_RLC , NONE , CONST_SH32 , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- rlwinm
2#010111_00000# to 2#010111_11111# = > ( ALU , NONE , OP_RLC , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- rlwnm
2#010001_00000# to 2#010001_11111# = > ( ALU , NONE , OP_SC , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sc
2#100110_00000# to 2#100110_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stb
2#100111_00000# to 2#100111_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stbu
2#110110_00000# to 2#110110_11111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , CONST_SI , FRS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stfd
2#110111_00000# to 2#110111_11111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , CONST_SI , FRS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stfdu
2#110100_00000# to 2#110100_11111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , CONST_SI , FRS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- stfs
2#110101_00000# to 2#110101_11111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , CONST_SI , FRS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- stfsu
2#101100_00000# to 2#101100_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sth
2#101101_00000# to 2#101101_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sthu
2#100100_00000# to 2#100100_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stw
2#100101_00000# to 2#100101_11111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_SI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stwu
2#001000_00000# to 2#001000_11111# = > ( ALU , NONE , OP_ADD , RA , CONST_SI , NONE , RT , '0' , '0' , '1' , '0' , ONE , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- subfic
2#000010_00000# to 2#000010_11111# = > ( ALU , NONE , OP_TRAP , RA , CONST_SI , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- tdi
2#000011_00000# to 2#000011_11111# = > ( ALU , NONE , OP_TRAP , RA , CONST_SI , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- twi
2#011010_00000# to 2#011010_11111# = > ( ALU , NONE , OP_XOR , NONE , CONST_UI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- xori
2#011011_00000# to 2#011011_11111# = > ( ALU , NONE , OP_XOR , NONE , CONST_UI_HI , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- xoris
-- major opcode 4
2#000100_10000# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , RCR , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- maddhd
2#000100_10001# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , RCR , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- maddhdu
2#000100_10011# = > ( ALU , NONE , OP_MUL_L64 , RA , RB , RCR , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- maddld
-- major opcode 30
2#011110_01000# to 2#011110_01001# = > ( ALU , NONE , OP_RLC , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldic
2#011110_01010# to 2#011110_01011# = > ( ALU , NONE , OP_RLC , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldic
2#011110_00000# to 2#011110_00001# = > ( ALU , NONE , OP_RLCL , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldicl
2#011110_00010# to 2#011110_00011# = > ( ALU , NONE , OP_RLCL , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldicl
2#011110_00100# to 2#011110_00101# = > ( ALU , NONE , OP_RLCR , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldicr
2#011110_00110# to 2#011110_00111# = > ( ALU , NONE , OP_RLCR , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldicr
2#011110_01100# to 2#011110_01101# = > ( ALU , NONE , OP_RLC , RA , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldimi
2#011110_01110# to 2#011110_01111# = > ( ALU , NONE , OP_RLC , RA , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldimi
2#011110_10000# to 2#011110_10001# = > ( ALU , NONE , OP_RLCL , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldcl
2#011110_10010# to 2#011110_10011# = > ( ALU , NONE , OP_RLCR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- rldcr
-- major opcode 58
2#111010_00000# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_00001# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_00010# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_00100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_00101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_00110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_01000# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_01001# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_01010# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_01100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_01101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_01110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_10000# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_10001# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_10010# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_10110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_11000# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_11001# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_11010# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
2#111010_11100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ld
2#111010_11101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldu
2#111010_11110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , CONST_DS , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwa
-- major opcode 59
2#111011_00100# to 2#111011_00101# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fdivs
2#111011_01000# to 2#111011_01001# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fsubs
2#111011_01010# to 2#111011_01011# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fadds
2#111011_01100# to 2#111011_01101# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fsqrts
2#111011_10000# to 2#111011_10001# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fres
2#111011_10010# to 2#111011_10011# = > ( FPU , FPU , OP_FP_ARITH , FRA , NONE , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fmuls
2#111011_10100# to 2#111011_10101# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- frsqrtes
2#111011_11000# to 2#111011_11001# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fmsubs
2#111011_11010# to 2#111011_11011# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fmadds
2#111011_11100# to 2#111011_11101# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fnmsubs
2#111011_11110# to 2#111011_11111# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fnmadds
-- major opcode 62
2#111110_00000# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_00001# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_00100# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_00101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_01000# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_01001# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_01100# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_01101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_10000# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_10001# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_10100# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_11000# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_11001# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
2#111110_11100# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- std
2#111110_11101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , CONST_DS , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdu
-- major opcode 63
2#111111_00100# to 2#111111_00101# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fdiv
2#111111_01000# to 2#111111_01001# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fsub
2#111111_01010# to 2#111111_01011# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fadd
2#111111_01100# to 2#111111_01101# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fsqrt
2#111111_01110# to 2#111111_01111# = > ( FPU , FPU , OP_FP_MOVE , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fsel
2#111111_10000# to 2#111111_10001# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fre
2#111111_10010# to 2#111111_10011# = > ( FPU , FPU , OP_FP_ARITH , FRA , NONE , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fmul
2#111111_10100# to 2#111111_10101# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- frsqrte
2#111111_11000# to 2#111111_11001# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fmsub
2#111111_11010# to 2#111111_11011# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fmadd
2#111111_11100# to 2#111111_11101# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fnmsub
2#111111_11110# to 2#111111_11111# = > ( FPU , FPU , OP_FP_ARITH , FRA , FRB , FRC , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- fnmadd
others = > illegal_inst
) ;
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
constant row_decode_rom : decoder_rom_t : = (
-- Major opcode 31
-- Address bits are 0, insn(10:1)
-- unit fac internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl rpt
-- op in out A out in out len ext pipe
2#0_01000_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- add
2#0_11000_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addo
2#0_00000_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addc
2#0_10000_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addco
2#0_00100_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- adde
2#0_10100_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addeo
2#0_00101_01010# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , OV , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addex
2#0_00010_01010# = > ( ALU , NONE , OP_ADDG6S , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- addg6s
2#0_00111_01010# = > ( ALU , NONE , OP_ADD , RA , CONST_M1 , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addme
2#0_10111_01010# = > ( ALU , NONE , OP_ADD , RA , CONST_M1 , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addmeo
2#0_00110_01010# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addze
2#0_10110_01010# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '0' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- addzeo
2#0_00000_11100# = > ( ALU , NONE , OP_AND , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- and
2#0_00001_11100# = > ( ALU , NONE , OP_AND , NONE , RB , RS , RA , '0' , '0' , '1' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- andc
2#0_00111_11100# = > ( ALU , NONE , OP_BPERM , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- bperm
2#0_01001_11010# = > ( ALU , NONE , OP_BCD , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cbcdtd
2#0_01000_11010# = > ( ALU , NONE , OP_BCD , NONE , NONE , RS , RA , '0' , '0' , '1' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cdtbcd
2#0_00000_00000# = > ( ALU , NONE , OP_CMP , RA , RB , NONE , NONE , '0' , '1' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- cmp
2#0_01111_11100# = > ( ALU , NONE , OP_CMPB , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cmpb
2#0_00111_00000# = > ( ALU , NONE , OP_CMPEQB , RA , RB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cmpeqb
2#0_00001_00000# = > ( ALU , NONE , OP_CMP , RA , RB , NONE , NONE , '0' , '1' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cmpl
2#0_00110_00000# = > ( ALU , NONE , OP_CMPRB , RA , RB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cmprb
2#0_00001_11010# = > ( ALU , NONE , OP_CNTZ , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- cntlzd
2#0_00000_11010# = > ( ALU , NONE , OP_CNTZ , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- cntlzw
2#0_10001_11010# = > ( ALU , NONE , OP_CNTZ , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- cnttzd
2#0_10000_11010# = > ( ALU , NONE , OP_CNTZ , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- cnttzw
2#0_10111_10011# = > ( ALU , NONE , OP_DARN , NONE , NONE , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- darn
2#0_00010_10110# = > ( ALU , NONE , OP_DCBF , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dcbf
2#0_00001_10110# = > ( ALU , NONE , OP_DCBST , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dcbst
2#0_01000_10110# = > ( ALU , NONE , OP_DCBT , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dcbt
2#0_00111_10110# = > ( ALU , NONE , OP_DCBTST , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dcbtst
2#0_11111_10110# = > ( LDST , NONE , OP_DCBZ , RA_OR_ZERO , RB , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dcbz
2#0_01100_01001# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- divdeu
2#0_11100_01001# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- divdeuo
2#0_01100_01011# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- divweu
2#0_11100_01011# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- divweuo
2#0_01101_01001# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- divde
2#0_11101_01001# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- divdeo
2#0_01101_01011# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- divwe
2#0_11101_01011# = > ( DVU , NONE , OP_DIVE , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- divweo
2#0_01110_01001# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- divdu
2#0_11110_01001# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- divduo
2#0_01110_01011# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- divwu
2#0_11110_01011# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- divwuo
2#0_01111_01001# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- divd
2#0_11111_01001# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- divdo
2#0_01111_01011# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- divw
2#0_11111_01011# = > ( DVU , NONE , OP_DIV , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- divwo
2#0_11001_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dss
2#0_01010_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dst
2#0_01011_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- dstst
2#0_11010_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- eieio
2#0_01000_11100# = > ( ALU , NONE , OP_XOR , NONE , RB , RS , RA , '0' , '0' , '0' , '1' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- eqv
2#0_11101_11010# = > ( ALU , NONE , OP_EXTS , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- extsb
2#0_11100_11010# = > ( ALU , NONE , OP_EXTS , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- extsh
2#0_11110_11010# = > ( ALU , NONE , OP_EXTS , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- extsw
2#0_11011_11010# = > ( ALU , NONE , OP_EXTSWSLI , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- extswsli
2#0_11011_11011# = > ( ALU , NONE , OP_EXTSWSLI , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- extswsli
2#0_11110_10110# = > ( ALU , NONE , OP_ICBI , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '1' , NONE ) , -- icbi
2#0_00000_10110# = > ( ALU , NONE , OP_ICBT , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '1' , NONE ) , -- icbt
2#0_00000_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00001_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00010_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00011_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00100_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00101_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00110_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00111_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01000_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01001_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01010_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01011_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01100_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01101_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01110_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_01111_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10000_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10001_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10010_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10011_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10100_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10101_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10110_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_10111_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11000_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11001_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11010_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11011_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11100_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11101_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11110_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_11111_01111# = > ( ALU , NONE , OP_ISEL , RA_OR_ZERO , RB , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isel
2#0_00001_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '1' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lbarx
2#0_11010_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lbzcix
2#0_00011_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lbzux
2#0_00010_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lbzx
2#0_00010_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '1' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ldarx
2#0_10000_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ldbrx
2#0_11011_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ldcix
2#0_00001_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- ldux
2#0_00000_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- ldx
2#0_10010_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lfdx
2#0_10011_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lfdux
2#0_11010_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lfiwax
2#0_11011_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lfiwzx
2#0_10000_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- lfsx
2#0_10001_10111# = > ( LDST , FPU , OP_LOAD , RA_OR_ZERO , RB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '1' , '0' , NONE , '0' , '0' , DUPD ) , -- lfsux
2#0_00011_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '1' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lharx
2#0_01011_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '1' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lhaux
2#0_01010_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lhax
2#0_11000_10110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lhbrx
2#0_11001_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lhzcix
2#0_01001_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lhzux
2#0_01000_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lhzx
2#0_00000_10100# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '1' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwarx
2#0_01011_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lwaux
2#0_01010_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '1' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwax
2#0_10000_10110# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwbrx
2#0_11000_10101# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwzcix
2#0_00001_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , DUPD ) , -- lwzux
2#0_00000_10111# = > ( LDST , NONE , OP_LOAD , RA_OR_ZERO , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- lwzx
2#0_10010_00000# = > ( ALU , NONE , OP_MCRXRX , NONE , NONE , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mcrxrx
2#0_00000_10011# = > ( ALU , NONE , OP_MFCR , NONE , NONE , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mfcr/mfocrf
2#0_00010_10011# = > ( ALU , NONE , OP_MFMSR , NONE , NONE , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '1' , NONE ) , -- mfmsr
2#0_01010_10011# = > ( ALU , NONE , OP_MFSPR , NONE , NONE , RS , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mfspr
2#0_01000_01001# = > ( DVU , NONE , OP_MOD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- modud
2#0_01000_01011# = > ( DVU , NONE , OP_MOD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- moduw
2#0_11000_01001# = > ( DVU , NONE , OP_MOD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , NONE , '0' , '0' , NONE ) , -- modsd
2#0_11000_01011# = > ( DVU , NONE , OP_MOD , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , NONE , '0' , '0' , NONE ) , -- modsw
2#0_00100_10000# = > ( ALU , NONE , OP_MTCRF , NONE , NONE , RS , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mtcrf/mtocrf
2#0_00100_10010# = > ( ALU , NONE , OP_MTMSRD , NONE , NONE , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- mtmsr
2#0_00101_10010# = > ( ALU , NONE , OP_MTMSRD , NONE , NONE , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mtmsrd # ignore top bits and d
2#0_01110_10011# = > ( ALU , NONE , OP_MTSPR , NONE , NONE , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mtspr
2#0_00010_01001# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- mulhd
2#0_00000_01001# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- mulhdu
2#0_00010_01011# = > ( ALU , NONE , OP_MUL_H32 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- mulhw
2#0_00000_01011# = > ( ALU , NONE , OP_MUL_H32 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- mulhwu
-- next 4 have reserved bit set
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
2#0_10010_01001# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- mulhd
2#0_10000_01001# = > ( ALU , NONE , OP_MUL_H64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- mulhdu
2#0_10010_01011# = > ( ALU , NONE , OP_MUL_H32 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- mulhw
2#0_10000_01011# = > ( ALU , NONE , OP_MUL_H32 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- mulhwu
2#0_00111_01001# = > ( ALU , NONE , OP_MUL_L64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- mulld
2#0_10111_01001# = > ( ALU , NONE , OP_MUL_L64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- mulldo
2#0_00111_01011# = > ( ALU , NONE , OP_MUL_L64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- mullw
2#0_10111_01011# = > ( ALU , NONE , OP_MUL_L64 , RA , RB , NONE , RT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- mullwo
2#0_01110_11100# = > ( ALU , NONE , OP_AND , NONE , RB , RS , RA , '0' , '0' , '0' , '1' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- nand
2#0_00011_01000# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- neg
2#0_10011_01000# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- nego
-- next 8 are reserved no-op instructions
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
2#0_10000_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10001_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10010_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10011_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10100_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10101_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10110_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_10111_10010# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- nop
2#0_00011_11100# = > ( ALU , NONE , OP_OR , NONE , RB , RS , RA , '0' , '0' , '0' , '1' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- nor
2#0_01101_11100# = > ( ALU , NONE , OP_OR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- or
2#0_01100_11100# = > ( ALU , NONE , OP_OR , NONE , RB , RS , RA , '0' , '0' , '1' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- orc
2#0_00011_11010# = > ( ALU , NONE , OP_POPCNT , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- popcntb
2#0_01111_11010# = > ( ALU , NONE , OP_POPCNT , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- popcntd
2#0_01011_11010# = > ( ALU , NONE , OP_POPCNT , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- popcntw
2#0_00101_11010# = > ( ALU , NONE , OP_PRTY , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- prtyd
2#0_00100_11010# = > ( ALU , NONE , OP_PRTY , NONE , NONE , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- prtyw
2#0_00100_00000# = > ( ALU , NONE , OP_SETB , NONE , NONE , NONE , RT , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- setb
2#0_01111_10010# = > ( LDST , NONE , OP_TLBIE , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- slbia
2#0_00000_11011# = > ( ALU , NONE , OP_SHL , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- sld
2#0_00000_11000# = > ( ALU , NONE , OP_SHL , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- slw
2#0_11000_11010# = > ( ALU , NONE , OP_SHR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- srad
2#0_11001_11010# = > ( ALU , NONE , OP_SHR , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- sradi
2#0_11001_11011# = > ( ALU , NONE , OP_SHR , NONE , CONST_SH , RS , RA , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '1' , RC , '0' , '0' , NONE ) , -- sradi
2#0_11000_11000# = > ( ALU , NONE , OP_SHR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- sraw
2#0_11001_11000# = > ( ALU , NONE , OP_SHR , NONE , CONST_SH32 , RS , RA , '0' , '0' , '0' , '0' , ZERO , '1' , NONE , '0' , '0' , '0' , '0' , '1' , '1' , RC , '0' , '0' , NONE ) , -- srawi
2#0_10000_11011# = > ( ALU , NONE , OP_SHR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- srd
2#0_10000_11000# = > ( ALU , NONE , OP_SHR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- srw
2#0_11110_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stbcix
2#0_10101_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '1' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- stbcx
2#0_00111_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stbux
2#0_00110_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is1B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stbx
2#0_10100_10100# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdbrx
2#0_11111_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdcix
2#0_00110_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '1' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- stdcx
2#0_00101_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdux
2#0_00100_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stdx
2#0_10110_10111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , RB , FRS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stfdx
2#0_10111_10111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , RB , FRS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is8B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stfdux
2#0_11110_10111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , RB , FRS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stfiwx
2#0_10100_10111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , RB , FRS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- stfsx
2#0_10101_10111# = > ( LDST , FPU , OP_STORE , RA_OR_ZERO , RB , FRS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- stfsux
2#0_11100_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sthbrx
2#0_11101_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sthcix
2#0_10110_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '1' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- sthcx
2#0_01101_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sthux
2#0_01100_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is2B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sthx
2#0_10100_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '1' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stwbrx
2#0_11100_10101# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stwcix
2#0_00100_10110# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '1' , '0' , '0' , ONE , '0' , '0' , NONE ) , -- stwcx
2#0_00101_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '1' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stwux
2#0_00100_10111# = > ( LDST , NONE , OP_STORE , RA_OR_ZERO , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , is4B , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- stwx
2#0_00001_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subf
2#0_10001_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , ONE , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfo
2#0_00000_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , ONE , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfc
2#0_10000_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , ONE , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfco
2#0_00100_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfe
2#0_10100_01000# = > ( ALU , NONE , OP_ADD , RA , RB , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfeo
2#0_00111_01000# = > ( ALU , NONE , OP_ADD , RA , CONST_M1 , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfme
2#0_10111_01000# = > ( ALU , NONE , OP_ADD , RA , CONST_M1 , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfmeo
2#0_00110_01000# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfze
2#0_10110_01000# = > ( ALU , NONE , OP_ADD , RA , NONE , NONE , RT , '0' , '0' , '1' , '0' , CA , '1' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- subfzeo
2#0_10010_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- sync
2#0_00010_00100# = > ( ALU , NONE , OP_TRAP , RA , RB , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- td
2#0_00000_00100# = > ( ALU , NONE , OP_TRAP , RA , RB , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , NONE , '0' , '0' , NONE ) , -- tw
2#0_01001_10010# = > ( LDST , NONE , OP_TLBIE , NONE , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- tlbie
2#0_01000_10010# = > ( LDST , NONE , OP_TLBIE , NONE , RB , RS , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- tlbiel
2#0_10001_10110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- tlbsync
2#0_00000_11110# = > ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- wait
2#0_01001_11100# = > ( ALU , NONE , OP_XOR , NONE , RB , RS , RA , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- xor
-- Major opcode 19
-- Columns with insn(4) = '1' are all illegal and not mapped here; to
-- fit into 2048 entries, the columns are remapped so that 16-24 are
-- stored here as 8-15; in other words the address bits are
-- 1, insn(10..6), 1, insn(5), insn(3..1)
2#1_10000_11000# = > ( ALU , NONE , OP_BCREG , NONE , NONE , NONE , NONE , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '1' , '0' , NONE ) , -- bcctr
2#1_00000_11000# = > ( ALU , NONE , OP_BCREG , NONE , NONE , NONE , NONE , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '1' , '0' , NONE ) , -- bclr
2#1_10001_11000# = > ( ALU , NONE , OP_BCREG , NONE , NONE , NONE , NONE , '1' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '1' , '0' , NONE ) , -- bctar
2#1_01000_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crand
2#1_00100_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crandc
2#1_01001_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- creqv
2#1_00111_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crnand
2#1_00001_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crnor
2#1_01110_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- cror
2#1_01101_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crorc
2#1_00110_10001# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- crxor
2#1_00100_11110# = > ( ALU , NONE , OP_ISYNC , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- isync
2#1_00000_10000# = > ( ALU , NONE , OP_CROP , NONE , NONE , NONE , NONE , '1' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- mcrf
2#1_00000_11010# = > ( ALU , NONE , OP_RFID , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- rfid
-- Major opcode 59
-- Only column 14 is valid here; columns 16-31 are handled in the major table
-- Column 14 is mapped to column 6 of the space which is
-- mostly used for opcode 19.
2#1_11010_10110# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fcfids
2#1_11110_10110# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- fcfidus
-- Major opcode 63
-- Columns 0-15 are mapped here; columns 16-31 are in the major table.
-- Address bits are 1, insn(10:6), 0, insn(4:1)
2#1_00000_00000# = > ( FPU , FPU , OP_FP_CMP , FRA , FRB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 0/0=fcmpu
2#1_00001_00000# = > ( FPU , FPU , OP_FP_CMP , FRA , FRB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 1/0=fcmpo
2#1_00010_00000# = > ( FPU , FPU , OP_FP_CMP , NONE , NONE , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 2/0=mcrfs
2#1_00100_00000# = > ( FPU , FPU , OP_FP_CMP , FRA , FRB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 4/0=ftdiv
2#1_00101_00000# = > ( FPU , FPU , OP_FP_CMP , NONE , FRB , NONE , NONE , '0' , '1' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 5/0=ftsqrt
2#1_00001_00110# = > ( FPU , FPU , OP_FP_MISC , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 1/6=mtfsb1
2#1_00010_00110# = > ( FPU , FPU , OP_FP_MISC , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 2/6=mtfsb0
2#1_00100_00110# = > ( FPU , FPU , OP_FP_MISC , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 4/6=mtfsfi
2#1_11010_00110# = > ( FPU , FPU , OP_FP_MISC , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 26/6=fmrgow
2#1_11110_00110# = > ( FPU , FPU , OP_FP_MISC , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) , -- 30/6=fmrgew
2#1_10010_00111# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 18/7=mffs family
2#1_10110_00111# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 22/7=mtfsf
2#1_00000_01000# = > ( FPU , FPU , OP_FP_MOVE , FRA , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 0/8=fcpsgn
2#1_00001_01000# = > ( FPU , FPU , OP_FP_MOVE , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 1/8=fneg
2#1_00010_01000# = > ( FPU , FPU , OP_FP_MOVE , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 2/8=fmr
2#1_00100_01000# = > ( FPU , FPU , OP_FP_MOVE , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 4/8=fnabs
2#1_01000_01000# = > ( FPU , FPU , OP_FP_MOVE , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 8/8=fabs
2#1_01100_01000# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 12/8=frin
2#1_01101_01000# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 13/8=friz
2#1_01110_01000# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 14/8=frip
2#1_01111_01000# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 15/8=frim
2#1_00000_01100# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '1' , '0' , RC , '0' , '0' , NONE ) , -- 0/12=frsp
2#1_00000_01110# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 0/14=fctiw
2#1_00100_01110# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 4/14=fctiwu
2#1_11001_01110# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 25/14=fctid
2#1_11010_01110# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 26/14=fcfid
2#1_11101_01110# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 29/14=fctidu
2#1_11110_01110# = > ( FPU , FPU , OP_FP_MISC , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 30/14=fcfidu
2#1_00000_01111# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 0/15=fctiwz
2#1_00100_01111# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 4/15=fctiwuz
2#1_11001_01111# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 25/15=fctidz
2#1_11101_01111# = > ( FPU , FPU , OP_FP_ARITH , NONE , FRB , NONE , FRT , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , RC , '0' , '0' , NONE ) , -- 29/15=fctiduz
others = > illegal_inst
) ;
-- unit fac internal in1 in2 in3 out CR CR inv inv cry cry ldst BR sgn upd rsrv 32b sgn rc lk sgl rpt
-- op in out A out in out len ext pipe
constant nop_instr : decode_rom_t : = ( ALU , NONE , OP_NOP , NONE , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) ;
constant fetch_fail_inst : decode_rom_t : = ( LDST , NONE , OP_FETCH_FAILED , CIA , NONE , NONE , NONE , '0' , '0' , '0' , '0' , ZERO , '0' , NONE , '0' , '0' , '0' , '0' , '0' , '0' , NONE , '0' , '0' , NONE ) ;
function decode_ram_spr ( sprn : spr_num_t ) return ram_spr_info is
variable ret : ram_spr_info ;
begin
ret : = ( index = > ( others = > '0' ) , isodd = > '0' , valid = > '1' ) ;
case sprn is
when SPR_LR = >
ret . index : = RAMSPR_LR ;
when SPR_CTR = >
ret . index : = RAMSPR_CTR ;
ret . isodd : = '1' ;
when SPR_TAR = >
ret . index : = RAMSPR_TAR ;
when SPR_SRR0 = >
ret . index : = RAMSPR_SRR0 ;
when SPR_SRR1 = >
ret . index : = RAMSPR_SRR1 ;
ret . isodd : = '1' ;
when SPR_HSRR0 = >
ret . index : = RAMSPR_HSRR0 ;
when SPR_HSRR1 = >
ret . index : = RAMSPR_HSRR1 ;
ret . isodd : = '1' ;
when SPR_SPRG0 = >
ret . index : = RAMSPR_SPRG0 ;
when SPR_SPRG1 = >
ret . index : = RAMSPR_SPRG1 ;
ret . isodd : = '1' ;
when SPR_SPRG2 = >
ret . index : = RAMSPR_SPRG2 ;
when SPR_SPRG3 | SPR_SPRG3U = >
ret . index : = RAMSPR_SPRG3 ;
ret . isodd : = '1' ;
when SPR_HSPRG0 = >
ret . index : = RAMSPR_HSPRG0 ;
when SPR_HSPRG1 = >
ret . index : = RAMSPR_HSPRG1 ;
ret . isodd : = '1' ;
when others = >
ret . valid : = '0' ;
end case ;
return ret ;
end ;
function map_spr ( sprn : spr_num_t ) return spr_id is
variable i : spr_id ;
begin
i . sel : = "000" ;
i . valid : = '1' ;
i . ispmu : = '0' ;
case sprn is
when SPR_TB = >
i . sel : = SPRSEL_TB ;
when SPR_TBU = >
i . sel : = SPRSEL_TBU ;
when SPR_DEC = >
i . sel : = SPRSEL_DEC ;
when SPR_PVR = >
i . sel : = SPRSEL_PVR ;
when 724 = > -- LOG_ADDR SPR
i . sel : = SPRSEL_LOGA ;
when 725 = > -- LOG_DATA SPR
i . sel : = SPRSEL_LOGD ;
when SPR_UPMC1 | SPR_UPMC2 | SPR_UPMC3 | SPR_UPMC4 | SPR_UPMC5 | SPR_UPMC6 |
SPR_UMMCR0 | SPR_UMMCR1 | SPR_UMMCR2 | SPR_UMMCRA | SPR_USIER | SPR_USIAR | SPR_USDAR |
SPR_PMC1 | SPR_PMC2 | SPR_PMC3 | SPR_PMC4 | SPR_PMC5 | SPR_PMC6 |
SPR_MMCR0 | SPR_MMCR1 | SPR_MMCR2 | SPR_MMCRA | SPR_SIER | SPR_SIAR | SPR_SDAR = >
i . ispmu : = '1' ;
when SPR_CFAR = >
i . sel : = SPRSEL_CFAR ;
when SPR_XER = >
i . sel : = SPRSEL_XER ;
when others = >
i . valid : = '0' ;
end case ;
return i ;
end ;
begin
decode1_0 : process ( clk )
begin
if rising_edge ( clk ) then
if rst = '1' then
r < = Decode1ToDecode2Init ;
ri < = reg_internal_t_init ;
elsif flush_in = '1' then
r . valid < = '0' ;
elsif stall_in = '0' then
r < = rin ;
ri < = ri_in ;
end if ;
if rst = '1' then
br . br_nia < = ( others = > '0' ) ;
br . br_offset < = ( others = > '0' ) ;
br . predict < = '0' ;
else
br < = br_in ;
end if ;
end if ;
end process ;
busy_out < = stall_in ;
decode1_1 : process ( all )
variable v : Decode1ToDecode2Type ;
variable vr : Decode1ToRegisterFileType ;
variable vi : reg_internal_t ;
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
variable majorop : std_ulogic_vector ( 5 downto 0 ) ;
variable majaddr : std_ulogic_vector ( 10 downto 0 ) ;
variable rowaddr : std_ulogic_vector ( 10 downto 0 ) ;
variable sprn : spr_num_t ;
variable br_target : std_ulogic_vector ( 61 downto 0 ) ;
variable br_offset : signed ( 23 downto 0 ) ;
variable bv : br_predictor_t ;
variable fprs , fprabc : std_ulogic ;
variable in3rc : std_ulogic ;
variable may_read_rb : std_ulogic ;
begin
v : = Decode1ToDecode2Init ;
vi : = reg_internal_t_init ;
v . valid : = f_in . valid ;
v . nia : = f_in . nia ;
v . insn : = f_in . insn ;
v . stop_mark : = f_in . stop_mark ;
core: Implement quadword loads and stores
This implements the lq, stq, lqarx and stqcx. instructions.
These instructions all access two consecutive GPRs; for example the
"lq %r6,0(%r3)" instruction will load the doubleword at the address
in R3 into R7 and the doubleword at address R3 + 8 into R6. To cope
with having two GPR sources or destinations, the instruction gets
repeated at the decode2 stage, that is, for each lq/stq/lqarx/stqcx.
coming in from decode1, two instructions get sent out to execute1.
For these instructions, the RS or RT register gets modified on one
of the iterations by setting the LSB of the register number. In LE
mode, the first iteration uses RS|1 or RT|1 and the second iteration
uses RS or RT. In BE mode, this is done the other way around. In
order for decode2 to know what endianness is currently in use, we
pass the big_endian flag down from icache through decode1 to decode2.
This is always in sync with what execute1 is using because only rfid
or an interrupt can change MSR[LE], and those operations all cause
a flush and redirect.
There is now an extra column in the decode tables in decode1 to
indicate whether the instruction needs to be repeated. Decode1 also
enforces the rule that lq with RT = RT and lqarx with RA = RT or
RB = RT are illegal.
Decode2 now passes a 'repeat' flag and a 'second' flag to execute1,
and execute1 passes them on to loadstore1. The 'repeat' flag is set
for both iterations of a repeated instruction, and 'second' is set
on the second iteration. Execute1 does not take asynchronous or
trace interrupts on the second iteration of a repeated instruction.
Loadstore1 uses 'next_addr' for the second iteration of a repeated
load/store so that we access the second doubleword of the memory
operand. Thus loadstore1 accesses the doublewords in increasing
memory order. For 16-byte loads this means that the first iteration
writes GPR RT|1. It is possible that RA = RT|1 (this is a legal
but non-preferred form), meaning that if the memory operand was
misaligned, the first iteration would overwrite RA but then the
second iteration might take a page fault, leading to corrupted state.
To avoid that possibility, 16-byte loads in LE mode take an
alignment interrupt if the operand is not 16-byte aligned. (This
is the case anyway for lqarx, and we enforce it for lq as well.)
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
4 years ago
v . big_endian : = f_in . big_endian ;
fprs : = '0' ;
fprabc : = '0' ;
in3rc : = '0' ;
may_read_rb : = '0' ;
if f_in . valid = '1' then
report "Decode insn " & to_hstring ( f_in . insn ) & " at " & to_hstring ( f_in . nia ) ;
end if ;
br_offset : = ( others = > '0' ) ;
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
majorop : = f_in . insn ( 31 downto 26 ) ;
majaddr : = majorop & f_in . insn ( 4 downto 0 ) ;
if is_X ( majaddr ) then
v . decode : = x_inst ;
else
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
vi . maj_decode : = major_decode_rom ( to_integer ( unsigned ( majaddr ) ) ) ;
end if ;
-- row_decode_rom is used for op 19, 31, 59, 63
-- addr bit 10 is 0 for op 31, 1 for 19, 59, 63
rowaddr ( 10 ) : = f_in . insn ( 31 ) or not f_in . insn ( 29 ) ;
rowaddr ( 9 downto 5 ) : = f_in . insn ( 10 downto 6 ) ;
if f_in . insn ( 28 ) = '0' then
-- op 19 and op 59
rowaddr ( 4 downto 3 ) : = '1' & f_in . insn ( 5 ) ;
else
-- op 31 and 63; for 63 we only use this when f_in.insn(5) = '0'
rowaddr ( 4 downto 3 ) : = f_in . insn ( 5 downto 4 ) ;
end if ;
rowaddr ( 2 downto 0 ) : = f_in . insn ( 3 downto 1 ) ;
if is_X ( rowaddr ) then
vi . row_decode : = x_inst ;
else
vi . row_decode : = row_decode_rom ( to_integer ( unsigned ( rowaddr ) ) ) ;
end if ;
if is_X ( f_in . insn ) then
v . spr_info : = ( sel = > "XXX" , others = > 'X' ) ;
v . ram_spr : = ( index = > ( others = > 'X' ) , others = > 'X' ) ;
else
sprn : = decode_spr_num ( f_in . insn ) ;
v . spr_info : = map_spr ( sprn ) ;
v . ram_spr : = decode_ram_spr ( sprn ) ;
end if ;
case unsigned ( majorop ) is
when "000100" = > -- 4
-- major opcode 4, mostly VMX/VSX stuff but also some integer ops (madd*)
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
vi . override : = not f_in . insn ( 5 ) ;
in3rc : = '1' ;
may_read_rb : = '1' ;
when "010111" = > -- 23
-- rlwnm[.]
may_read_rb : = '1' ;
when "011111" = > -- 31
-- major opcode 31, lots of things
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
vi . use_row : = '1' ;
may_read_rb : = '1' ;
if HAS_FPU and std_match ( f_in . insn ( 10 downto 1 ) , "1----10111" ) then
-- lower half of column 23 has FP loads and stores
fprs : = '1' ;
end if ;
when "010000" = > -- 16
-- Predict backward branches as taken, forward as untaken
v . br_pred : = f_in . insn ( 15 ) ;
br_offset : = resize ( signed ( f_in . insn ( 15 downto 2 ) ) , 24 ) ;
when "010010" = > -- 18
-- Unconditional branches are always taken
v . br_pred : = '1' ;
br_offset : = signed ( f_in . insn ( 25 downto 2 ) ) ;
when "010011" = > -- 19
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
-- Columns 8-15 and 24-31 don't have any valid instructions
-- (where insn(5..1) is the column number).
-- addpcis (column 2) is in the major table
-- Use the row table for columns 0-1 and 16-23 (mapped to 8-15)
-- Columns 4-7 in the row table are used for op 59 cols 12-15
vi . override : = f_in . insn ( 4 ) ;
vi . use_row : = f_in . insn ( 5 ) or ( not f_in . insn ( 3 ) and not f_in . insn ( 2 ) ) ;
when "011000" = > -- 24
-- ori, special-case the standard NOP
if std_match ( f_in . insn , "01100000000000000000000000000000" ) then
report "PPC_nop" ;
vi . override : = '1' ;
vi . override_decode : = nop_instr ;
end if ;
when "011110" = > -- 30
may_read_rb : = f_in . insn ( 4 ) ;
when "110100" | "110101" | "110110" | "110111" = > -- 52, 53, 54, 55
-- stfd[u] and stfs[u]
if HAS_FPU then
fprs : = '1' ;
end if ;
when "111011" = > -- 59
FPU: Implement floating convert from integer instructions
This implements fcfid, fcfidu, fcfids and fcfidus, which convert
64-bit integer values in an FPR into a floating-point value.
This brings in a lot of the datapath that will be needed in
future, including the shifter, adder, mask generator and
count-leading-zeroes logic, along with the machinery for rounding
to single-precision or double-precision, detecting inexact results,
signalling inexact-result exceptions, and updating result flags
in the FPSCR.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
4 years ago
if HAS_FPU then
-- floating point operations, mostly single-precision
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
-- Use row table for columns 12-15, major table for 16-31
vi . override : = not f_in . insn ( 5 ) and ( not f_in . insn ( 4 ) or not f_in . insn ( 3 ) ) ;
vi . use_row : = not f_in . insn ( 5 ) ;
in3rc : = '1' ;
fprabc : = '1' ;
fprs : = '1' ;
may_read_rb : = '1' ;
FPU: Implement floating convert from integer instructions
This implements fcfid, fcfidu, fcfids and fcfidus, which convert
64-bit integer values in an FPR into a floating-point value.
This brings in a lot of the datapath that will be needed in
future, including the shifter, adder, mask generator and
count-leading-zeroes logic, along with the machinery for rounding
to single-precision or double-precision, detecting inexact results,
signalling inexact-result exceptions, and updating result flags
in the FPSCR.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
4 years ago
end if ;
when "111111" = > -- 63
if HAS_FPU then
-- floating point operations, general and double-precision
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
vi . use_row : = not f_in . insn ( 5 ) ;
in3rc : = '1' ;
fprabc : = '1' ;
fprs : = '1' ;
may_read_rb : = '1' ;
end if ;
when others = >
end case ;
-- Work out GPR/FPR read addresses
vr . reg_1_addr : = fprabc & insn_ra ( f_in . insn ) ;
vr . reg_2_addr : = fprabc & insn_rb ( f_in . insn ) ;
if in3rc = '1' then
vr . reg_3_addr : = fprabc & insn_rcreg ( f_in . insn ) ;
else
vr . reg_3_addr : = fprs & insn_rs ( f_in . insn ) ;
end if ;
vr . read_1_enable : = f_in . valid and not f_in . fetch_failed ;
vr . read_2_enable : = f_in . valid and not f_in . fetch_failed and may_read_rb ;
vr . read_3_enable : = f_in . valid and not f_in . fetch_failed ;
v . reg_a : = vr . reg_1_addr ;
v . reg_b : = vr . reg_2_addr ;
v . reg_c : = vr . reg_3_addr ;
if f_in . fetch_failed = '1' then
v . valid : = '1' ;
vi . override : = '1' ;
vi . override_decode : = fetch_fail_inst ;
-- Only send down a single OP_FETCH_FAILED
if ri . override = '1' and ri . override_decode . insn_type = OP_FETCH_FAILED then
v . valid : = '0' ;
end if ;
end if ;
-- Branch predictor
-- Note bclr, bcctr and bctar are predicted not taken as we have no
-- count cache or link stack.
bv . br_nia : = f_in . nia ( 63 downto 2 ) ;
if f_in . insn ( 1 ) = '1' then
bv . br_nia : = ( others = > '0' ) ;
end if ;
bv . br_offset : = br_offset ;
fetch1: Implement a simple branch target cache
This implements a cache in fetch1, where each entry stores the address
of a simple branch instruction (b or bc) and the target of the branch.
When fetching sequentially, if the address being fetched matches the
cache entry, then fetching will be redirected to the branch target.
The cache has 1024 entries and is direct-mapped, i.e. indexed by bits
11..2 of the NIA.
The bus from execute1 now carries information about taken and
not-taken simple branches, which fetch1 uses to update the cache.
The cache entry is updated for both taken and not-taken branches, with
the valid bit being set if the branch was taken and cleared if the
branch was not taken.
If fetching is redirected to the branch target then that goes down the
pipe as a predicted-taken branch, and decode1 does not do any static
branch prediction. If fetching is not redirected, then the next
instruction goes down the pipe as normal and decode1 does its static
branch prediction.
In order to make timing, the lookup of the cache is pipelined, so on
each cycle the cache entry for the current NIA + 8 is read. This
means that after a redirect (from decode1 or execute1), only the third
and subsequent sequentially-fetched instructions will be able to be
predicted.
This improves the coremark value on the Arty A7-100 from about 180 to
about 190 (more than 5%).
The BTC is optional. Builds for the Artix 7 35-T part have it off by
default because the extra ~1420 LUTs it takes mean that the design
doesn't fit on the Arty A7-35 board.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
4 years ago
if f_in . next_predicted = '1' then
v . br_pred : = '1' ;
elsif f_in . next_pred_ntaken = '1' then
v . br_pred : = '0' ;
fetch1: Implement a simple branch target cache
This implements a cache in fetch1, where each entry stores the address
of a simple branch instruction (b or bc) and the target of the branch.
When fetching sequentially, if the address being fetched matches the
cache entry, then fetching will be redirected to the branch target.
The cache has 1024 entries and is direct-mapped, i.e. indexed by bits
11..2 of the NIA.
The bus from execute1 now carries information about taken and
not-taken simple branches, which fetch1 uses to update the cache.
The cache entry is updated for both taken and not-taken branches, with
the valid bit being set if the branch was taken and cleared if the
branch was not taken.
If fetching is redirected to the branch target then that goes down the
pipe as a predicted-taken branch, and decode1 does not do any static
branch prediction. If fetching is not redirected, then the next
instruction goes down the pipe as normal and decode1 does its static
branch prediction.
In order to make timing, the lookup of the cache is pipelined, so on
each cycle the cache entry for the current NIA + 8 is read. This
means that after a redirect (from decode1 or execute1), only the third
and subsequent sequentially-fetched instructions will be able to be
predicted.
This improves the coremark value on the Arty A7-100 from about 180 to
about 190 (more than 5%).
The BTC is optional. Builds for the Artix 7 35-T part have it off by
default because the extra ~1420 LUTs it takes mean that the design
doesn't fit on the Arty A7-35 board.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
4 years ago
end if ;
bv . predict : = v . br_pred and f_in . valid and not flush_in and not busy_out and not f_in . next_predicted ;
-- after a clock edge...
br_target : = std_ulogic_vector ( signed ( br . br_nia ) + br . br_offset ) ;
-- Update registers
rin < = v ;
ri_in < = vi ;
br_in < = bv ;
-- Update outputs
d_out < = r ;
if ri . override = '1' then
d_out . decode < = ri . override_decode ;
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
elsif ri . use_row = '1' then
d_out . decode < = ri . row_decode ;
else
d_out . decode < = ri . maj_decode ;
end if ;
f_out . redirect < = br . predict ;
f_out . redirect_nia < = br_target & "00" ;
flush_out < = bv . predict or br . predict ;
r_out < = vr ;
end process ;
d1_log : if LOG_LENGTH > 0 generate
signal log_data : std_ulogic_vector ( 12 downto 0 ) ;
begin
dec1_log : process ( clk )
begin
if rising_edge ( clk ) then
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
log_data < = std_ulogic_vector ( to_unsigned ( insn_type_t 'pos ( d_out . decode . insn_type ) , 6 ) ) &
r . nia ( 5 downto 2 ) &
decode1: Use block RAMs in decode
This combines the various decode arrays in decode1 into two, one
indexed by the major opcode (bits 31--26 of the instruction) together
with bits 4--0 of the instruction, and the other indexed mostly by the
minor opcode (bits 10--1), with some swizzles to accommodate the
relevant parts of the minor opcode space for opcodes 19, 31, 59 and 63
within a 2k entry ROM (11 address bits). These are called the "major"
and the "row" decode ROMs respectively. (Bits 10--6 of the
instruction are called the "row index", and bits 5--1, or 5--0 for
some opcodes, are called the "column index", because of the way the
opcode maps in the ISA are laid out.)
Both ROMs are looked up each cycle and the result from one or other,
or from an override in ri.override_decode, are selected after a clock
edge.
This uses quite a lot of BRAM resources. In future a predecode step
will reduce the BRAM usage substantially.
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2 years ago
std_ulogic_vector ( to_unsigned ( unit_t 'pos ( d_out . decode . unit ) , 2 ) ) &
r . valid ;
end if ;
end process ;
log_out < = log_data ;
end generate ;
end architecture behaviour ;
