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750 lines
28 KiB
VHDL
750 lines
28 KiB
VHDL
library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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library work;
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use work.helpers.all;
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package ppc_fx_insns is
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function ppc_addi (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_addis (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_add (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_subf (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_neg (ra: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_addic (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_adde (ra, rb: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector;
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function ppc_subfic (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_subfc (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_subfe (ra, rb: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector;
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function ppc_addze (ra: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector;
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function ppc_andi (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_andis (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_ori (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_oris (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_xori (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_xoris (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_and (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_xor (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_nand (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_or (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_nor (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_andc (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_eqv (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_orc (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_extsb (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_extsh (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_extsw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cntlzw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cnttzw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cntlzd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cnttzd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_popcntb (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_popcntw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_popcntd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_prtyd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_prtyw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_rlwinm (rs: std_ulogic_vector(63 downto 0); sh, mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector;
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function ppc_rlwnm (rs, rb: std_ulogic_vector(63 downto 0); mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector;
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function ppc_rlwimi (ra, rs: std_ulogic_vector(63 downto 0); sh, mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector;
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function ppc_rldicl (rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_rldicr (rs: std_ulogic_vector(63 downto 0); sh, me: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_rldic (rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_rldcl (rs, rb: std_ulogic_vector(63 downto 0); mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_rldcr (rs, rb: std_ulogic_vector(63 downto 0); me: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_rldimi (ra, rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_slw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_srw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_srawi (rs : std_ulogic_vector(63 downto 0); sh: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_sraw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_sld (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_srd (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_sradi (rs: std_ulogic_vector(63 downto 0); sh: std_ulogic_vector(5 downto 0)) return std_ulogic_vector;
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function ppc_srad (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulld (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulhd (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulhdu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulli (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_mullw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulhw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_mulhwu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cmpi (l: std_ulogic; ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_cmp (l: std_ulogic; ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cmpli (l: std_ulogic; ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector;
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function ppc_cmpl (l: std_ulogic; ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_cmpb (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_divw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_divdu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_divd (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_divwu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector;
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function ppc_b (nia: std_ulogic_vector(63 downto 0); bd: std_ulogic_vector(23 downto 0)) return std_ulogic_vector;
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function ppc_bc_taken(bo, bi: std_ulogic_vector(4 downto 0); cr: std_ulogic_vector(31 downto 0); ctr: std_ulogic_vector(63 downto 0)) return integer;
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function ppc_bcctr_taken(bo, bi: std_ulogic_vector(4 downto 0); cr: std_ulogic_vector(31 downto 0)) return integer;
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end package ppc_fx_insns;
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package body ppc_fx_insns is
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function ppc_addi (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(signed(ra) + signed(si));
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end;
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function ppc_addic (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return std_logic_vector(resize(unsigned(ra), 65) + unsigned(resize(signed(si), 64)));
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end;
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function ppc_adde (ra, rb: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector is
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begin
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return std_logic_vector(resize(unsigned(ra), 65) + resize(unsigned(rb), 65) + carry);
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end;
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function ppc_subfic (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return std_logic_vector(unsigned(resize(signed(si), 64)) + resize(unsigned(not(ra)), 65) + 1);
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end;
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function ppc_subfc (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_logic_vector(resize(unsigned(rb), 65) + resize(unsigned(not(ra)), 65) + 1);
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end;
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function ppc_subfe (ra, rb: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector is
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begin
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return std_logic_vector(resize(unsigned(rb), 65) + resize(unsigned(not(ra)), 65) + carry);
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end;
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function ppc_addze (ra: std_ulogic_vector(63 downto 0); carry: std_ulogic) return std_ulogic_vector is
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begin
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return std_logic_vector(resize(unsigned(ra), 65) + carry);
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end;
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function ppc_addis (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(signed(ra) + shift_left(resize(signed(si), 32), 16));
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end;
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function ppc_add (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(signed(ra) + signed(rb));
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end;
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function ppc_subf (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(signed(rb) - signed(ra));
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end;
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function ppc_neg (ra: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(-signed(ra));
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end;
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function ppc_andi (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs and std_ulogic_vector(resize(unsigned(ui), 64));
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end;
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function ppc_andis (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs and std_ulogic_vector(shift_left(resize(unsigned(ui), 64), 16));
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end;
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function ppc_ori (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs or std_ulogic_vector(resize(unsigned(ui), 64));
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end;
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function ppc_oris (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs or std_ulogic_vector(shift_left(resize(unsigned(ui), 64), 16));
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end;
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function ppc_xori (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs xor std_ulogic_vector(resize(unsigned(ui), 64));
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end;
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function ppc_xoris (rs: std_ulogic_vector(63 downto 0); ui: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
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begin
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return rs xor std_ulogic_vector(shift_left(resize(unsigned(ui), 64), 16));
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end;
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function ppc_and (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs and rb;
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end;
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function ppc_xor (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs xor rb;
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end;
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function ppc_nand (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs nand rb;
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end;
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function ppc_or (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs or rb;
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end;
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function ppc_nor (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs nor rb;
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end;
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function ppc_andc (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs and not(rb);
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end;
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function ppc_eqv (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return not(rs xor rb);
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end;
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function ppc_orc (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return rs or not(rb);
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end;
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function ppc_extsb (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(resize(signed(rs(7 downto 0)), rs'length));
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end;
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function ppc_extsh (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(resize(signed(rs(15 downto 0)), rs'length));
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end;
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function ppc_extsw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(resize(signed(rs(31 downto 0)), rs'length));
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end;
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function ppc_cntlzw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(to_unsigned(fls_32(rs(31 downto 0)), rs'length));
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end;
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function ppc_cnttzw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(to_unsigned(ffs_32(rs(31 downto 0)), rs'length));
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end;
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function ppc_cntlzd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(to_unsigned(fls_64(rs), rs'length));
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end;
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function ppc_cnttzd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return std_ulogic_vector(to_unsigned(ffs_64(rs), rs'length));
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end;
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function ppc_popcntb (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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variable ret: std_ulogic_vector (rs'range);
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variable hi: integer;
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variable lo: integer;
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begin
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ret := (others => '0');
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for i in 1 to 8 loop
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hi := (8*i)-1;
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lo := 8*(i-1);
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ret(hi downto lo) := popcnt8(rs(hi downto lo));
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end loop;
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return ret;
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end;
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function ppc_popcntw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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variable ret: std_ulogic_vector (rs'range);
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variable hi: integer;
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variable lo: integer;
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begin
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ret := (others => '0');
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for i in 1 to 2 loop
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hi := (32*i)-1;
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lo := 32*(i-1);
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ret(hi downto lo) := popcnt32(rs(hi downto lo));
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end loop;
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return ret;
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end;
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function ppc_popcntd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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begin
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return popcnt64(rs);
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end;
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function ppc_prtyd (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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variable tmp : std_ulogic;
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variable ret : std_ulogic_vector(63 downto 0);
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begin
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ret := (others => '0');
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tmp := '0';
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for i in 0 to 7 loop
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tmp := tmp xor rs(i*8);
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end loop;
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ret(0) := tmp;
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return ret;
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end;
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function ppc_prtyw (rs: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
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variable tmp : std_ulogic;
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variable ret : std_ulogic_vector(63 downto 0);
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begin
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ret := (others => '0');
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tmp := '0';
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for i in 0 to 3 loop
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tmp := tmp xor rs(i*8);
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end loop;
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ret(0) := tmp;
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tmp := '0';
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for i in 4 to 7 loop
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tmp := tmp xor rs(i*8);
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end loop;
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ret(32) := tmp;
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return ret;
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end;
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function ppc_rlwinm (rs: std_ulogic_vector(63 downto 0); sh, mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector is
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variable hi, lo : integer;
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variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
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begin
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hi := 31 - to_integer(unsigned(mb));
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lo := 31 - to_integer(unsigned(me));
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tmp1 := rs(31 downto 0) & rs(31 downto 0);
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tmp1 := std_ulogic_vector(rotate_left(unsigned(tmp1), to_integer(unsigned(sh))));
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tmp2 := (others => '0');
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if hi < lo then
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-- Mask wraps around
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tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
else
|
|
tmp2(hi downto lo) := tmp1(hi downto lo);
|
|
end if;
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rlwnm (rs, rb: std_ulogic_vector(63 downto 0); mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector is
|
|
variable hi, lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
variable n : integer;
|
|
begin
|
|
hi := 31 - to_integer(unsigned(mb));
|
|
lo := 31 - to_integer(unsigned(me));
|
|
n := to_integer(unsigned(rb(4 downto 0)));
|
|
tmp1 := rs(31 downto 0) & rs(31 downto 0);
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(tmp1), n));
|
|
tmp2 := (others => '0');
|
|
if hi < lo then
|
|
-- Mask wraps around
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
else
|
|
tmp2(hi downto lo) := tmp1(hi downto lo);
|
|
end if;
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rlwimi (ra, rs: std_ulogic_vector(63 downto 0); sh, mb, me: std_ulogic_vector(4 downto 0)) return std_ulogic_vector is
|
|
variable hi, lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
hi := 31 - to_integer(unsigned(mb));
|
|
lo := 31 - to_integer(unsigned(me));
|
|
tmp1 := rs(31 downto 0) & rs(31 downto 0);
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(tmp1), to_integer(unsigned(sh))));
|
|
tmp2 := ra;
|
|
if hi < lo then
|
|
-- Mask wraps around
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
else
|
|
tmp2(hi downto lo) := tmp1(hi downto lo);
|
|
end if;
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldicl (rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable hi : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
hi := 63-to_integer(unsigned(mb));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), to_integer(unsigned(sh))));
|
|
tmp2 := (others => '0');
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldicr (rs: std_ulogic_vector(63 downto 0); sh, me: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
lo := 63-to_integer(unsigned(me));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), to_integer(unsigned(sh))));
|
|
tmp2 := (others => '0');
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldic (rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable hi, lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
hi := 63-to_integer(unsigned(mb));
|
|
lo := to_integer(unsigned(sh));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), to_integer(unsigned(sh))));
|
|
tmp2 := (others => '0');
|
|
if hi < lo then
|
|
-- Mask wraps around
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
else
|
|
tmp2(hi downto lo) := tmp1(hi downto lo);
|
|
end if;
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldcl (rs, rb: std_ulogic_vector(63 downto 0); mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable hi : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
hi := 63-to_integer(unsigned(mb));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), to_integer(unsigned(rb(5 downto 0)))));
|
|
tmp2 := (others => '0');
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldcr (rs, rb: std_ulogic_vector(63 downto 0); me: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(63 downto 0);
|
|
begin
|
|
lo := 63-to_integer(unsigned(me));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), to_integer(unsigned(rb(5 downto 0)))));
|
|
tmp2 := (others => '0');
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_rldimi (ra, rs: std_ulogic_vector(63 downto 0); sh, mb: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable hi, lo : integer;
|
|
variable tmp1, tmp2 : std_ulogic_vector(rs'range);
|
|
begin
|
|
hi := 63-to_integer(unsigned(mb));
|
|
lo := to_integer(unsigned(sh));
|
|
tmp1 := std_ulogic_vector(rotate_left(unsigned(rs), lo));
|
|
tmp2 := ra;
|
|
if hi < lo then
|
|
-- Mask wraps around
|
|
tmp2(63 downto lo) := tmp1(63 downto lo);
|
|
tmp2(hi downto 0) := tmp1(hi downto 0);
|
|
else
|
|
tmp2(hi downto lo) := tmp1(hi downto lo);
|
|
end if;
|
|
return tmp2;
|
|
end;
|
|
|
|
function ppc_slw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
variable tmp : unsigned(31 downto 0);
|
|
begin
|
|
n := to_integer(unsigned(rb(5 downto 0)));
|
|
tmp := shift_left(unsigned(rs(31 downto 0)), n);
|
|
|
|
return (63 downto 32 => '0') & std_ulogic_vector(tmp);
|
|
end;
|
|
|
|
function ppc_srw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
variable tmp : unsigned(31 downto 0);
|
|
begin
|
|
n := to_integer(unsigned(rb(5 downto 0)));
|
|
tmp := shift_right(unsigned(rs(31 downto 0)), n);
|
|
|
|
return (63 downto 32 => '0') & std_ulogic_vector(tmp);
|
|
end;
|
|
|
|
function ppc_srawi (rs : std_ulogic_vector(63 downto 0); sh: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
variable tmp : signed(31 downto 0);
|
|
variable carry: std_ulogic;
|
|
begin
|
|
n := to_integer(unsigned(sh));
|
|
tmp := shift_right(signed(rs(31 downto 0)), n);
|
|
-- what about n = 0?
|
|
carry := or rs(n-1 downto 0) and rs(31);
|
|
|
|
return carry & std_ulogic_vector(resize(tmp, rs'length));
|
|
end;
|
|
|
|
function ppc_sraw (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : natural;
|
|
variable tmp : signed(31 downto 0);
|
|
variable carry: std_ulogic;
|
|
begin
|
|
n := to_integer(unsigned(rb(5 downto 0)));
|
|
tmp := shift_right(signed(rs(31 downto 0)), n);
|
|
-- what about n = 0?
|
|
carry := or rs(n-1 downto 0) and rs(31);
|
|
|
|
return carry & std_ulogic_vector(resize(tmp, rs'length));
|
|
end;
|
|
|
|
function ppc_sld (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
begin
|
|
n := to_integer(unsigned(rb(6 downto 0)));
|
|
return std_ulogic_vector(shift_left(unsigned(rs), n));
|
|
end;
|
|
|
|
function ppc_srd (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
begin
|
|
n := to_integer(unsigned(rb(6 downto 0)));
|
|
return std_ulogic_vector(shift_right(unsigned(rs), n));
|
|
end;
|
|
|
|
function ppc_sradi (rs: std_ulogic_vector(63 downto 0); sh: std_ulogic_vector(5 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
variable carry: std_ulogic;
|
|
begin
|
|
n := to_integer(unsigned(sh));
|
|
-- what about n = 0?
|
|
carry := or rs(n-1 downto 0) and rs(63);
|
|
|
|
return carry & std_ulogic_vector(shift_right(signed(rs), n));
|
|
end;
|
|
|
|
function ppc_srad (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable n : integer;
|
|
variable carry: std_ulogic;
|
|
begin
|
|
n := to_integer(unsigned(rb(6 downto 0)));
|
|
-- what about n = 0?
|
|
carry := or rs(n-1 downto 0) and rs(63);
|
|
|
|
return carry & std_ulogic_vector(shift_right(signed(rs), n));
|
|
end;
|
|
|
|
-- Not sure how to better communicate the top 64 bits of the result is unused
|
|
function ppc_mulld (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(127 downto 0);
|
|
begin
|
|
tmp := signed(ra) * signed(rb);
|
|
return std_ulogic_vector(tmp(63 downto 0));
|
|
end;
|
|
|
|
-- Not sure how to better communicate the top 64 bits of the result is unused
|
|
function ppc_mulhd (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(127 downto 0);
|
|
begin
|
|
tmp := signed(ra) * signed(rb);
|
|
return std_ulogic_vector(tmp(127 downto 64));
|
|
end;
|
|
|
|
-- Not sure how to better communicate the top 64 bits of the result is unused
|
|
function ppc_mulhdu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: unsigned(127 downto 0);
|
|
begin
|
|
tmp := unsigned(ra) * unsigned(rb);
|
|
return std_ulogic_vector(tmp(127 downto 64));
|
|
end;
|
|
|
|
-- Not sure how to better communicate the top 16 bits of the result is unused
|
|
function ppc_mulli (ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(79 downto 0);
|
|
begin
|
|
tmp := signed(ra) * signed(si);
|
|
return std_ulogic_vector(tmp(63 downto 0));
|
|
end;
|
|
|
|
function ppc_mullw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
begin
|
|
return std_ulogic_vector(signed(ra(31 downto 0)) * signed(rb(31 downto 0)));
|
|
end;
|
|
|
|
function ppc_mulhw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(63 downto 0);
|
|
begin
|
|
tmp := signed(ra(31 downto 0)) * signed(rb(31 downto 0));
|
|
return std_ulogic_vector(tmp(63 downto 32)) & std_ulogic_vector(tmp(63 downto 32));
|
|
end;
|
|
|
|
function ppc_mulhwu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: unsigned(63 downto 0);
|
|
begin
|
|
tmp := unsigned(ra(31 downto 0)) * unsigned(rb(31 downto 0));
|
|
return std_ulogic_vector(tmp(63 downto 32)) & std_ulogic_vector(tmp(63 downto 32));
|
|
end;
|
|
|
|
function ppc_cmpi (l: std_ulogic; ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(ra'range);
|
|
begin
|
|
tmp := signed(ra);
|
|
if l = '0' then
|
|
tmp := resize(signed(ra(31 downto 0)), tmp'length);
|
|
end if;
|
|
|
|
return ppc_signed_compare(tmp, resize(signed(si), tmp'length));
|
|
end;
|
|
|
|
function ppc_cmp (l: std_ulogic; ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmpa, tmpb: signed(ra'range);
|
|
begin
|
|
tmpa := signed(ra);
|
|
tmpb := signed(rb);
|
|
if l = '0' then
|
|
tmpa := resize(signed(ra(31 downto 0)), ra'length);
|
|
tmpb := resize(signed(rb(31 downto 0)), ra'length);
|
|
end if;
|
|
|
|
return ppc_signed_compare(tmpa, tmpb);
|
|
end;
|
|
|
|
function ppc_cmpli (l: std_ulogic; ra: std_ulogic_vector(63 downto 0); si: std_ulogic_vector(15 downto 0)) return std_ulogic_vector is
|
|
variable tmp: unsigned(ra'range);
|
|
begin
|
|
tmp := unsigned(ra);
|
|
if l = '0' then
|
|
tmp := resize(unsigned(ra(31 downto 0)), tmp'length);
|
|
end if;
|
|
|
|
return ppc_unsigned_compare(tmp, resize(unsigned(si), tmp'length));
|
|
end;
|
|
|
|
function ppc_cmpl (l: std_ulogic; ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmpa, tmpb: unsigned(ra'range);
|
|
begin
|
|
tmpa := unsigned(ra);
|
|
tmpb := unsigned(rb);
|
|
if l = '0' then
|
|
tmpa := resize(unsigned(ra(31 downto 0)), ra'length);
|
|
tmpb := resize(unsigned(rb(31 downto 0)), ra'length);
|
|
end if;
|
|
|
|
return ppc_unsigned_compare(tmpa, tmpb);
|
|
end;
|
|
|
|
function ppc_cmpb (rs, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable ret: std_ulogic_vector (rs'range);
|
|
variable hi: integer;
|
|
variable lo: integer;
|
|
begin
|
|
for i in 1 to 8 loop
|
|
hi := (8*i)-1;
|
|
lo := 8*(i-1);
|
|
ret(hi downto lo) := cmp_one_byte(rs(hi downto lo), rb(hi downto lo));
|
|
end loop;
|
|
|
|
return ret;
|
|
end;
|
|
|
|
-- Not synthesizable
|
|
function ppc_divw (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(31 downto 0);
|
|
begin
|
|
tmp := signed(ra(31 downto 0)) / signed(rb(31 downto 0));
|
|
|
|
return (63 downto 32 => '0') & std_ulogic_vector(tmp);
|
|
end;
|
|
|
|
function ppc_divdu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: unsigned(63 downto 0) := (others => '0');
|
|
begin
|
|
if unsigned(rb) /= 0 then
|
|
tmp := unsigned(ra) / unsigned(rb);
|
|
end if;
|
|
|
|
return std_ulogic_vector(tmp);
|
|
end;
|
|
|
|
function ppc_divd (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: signed(63 downto 0) := (others => '0');
|
|
begin
|
|
if signed(rb) /= 0 then
|
|
tmp := signed(ra) / signed(rb);
|
|
end if;
|
|
|
|
return std_ulogic_vector(tmp);
|
|
end;
|
|
|
|
function ppc_divwu (ra, rb: std_ulogic_vector(63 downto 0)) return std_ulogic_vector is
|
|
variable tmp: unsigned(31 downto 0) := (others => '0');
|
|
begin
|
|
if unsigned(rb(31 downto 0)) /= 0 then
|
|
tmp := unsigned(ra(31 downto 0)) / unsigned(rb(31 downto 0));
|
|
end if;
|
|
|
|
return std_ulogic_vector(resize(tmp, ra'length));
|
|
end;
|
|
|
|
function ppc_b (nia: std_ulogic_vector(63 downto 0); bd: std_ulogic_vector(23 downto 0)) return std_ulogic_vector is
|
|
begin
|
|
return std_ulogic_vector(signed(nia) + signed(bd & "00"));
|
|
end;
|
|
|
|
function ppc_bc_taken(bo, bi: std_ulogic_vector(4 downto 0); cr: std_ulogic_vector(31 downto 0); ctr: std_ulogic_vector(63 downto 0)) return integer is
|
|
variable crfield: integer;
|
|
variable crbit_match: std_ulogic;
|
|
variable ctr_not_zero: std_ulogic;
|
|
variable ctr_ok: std_ulogic;
|
|
variable cond_ok: std_ulogic;
|
|
variable ret: integer;
|
|
begin
|
|
crfield := to_integer(unsigned(bi));
|
|
-- BE bit numbering
|
|
crbit_match := '1' when cr(31-crfield) = bo(4-1) else '0';
|
|
-- We check this before it is decremented
|
|
ctr_not_zero := '1' when ctr /= x"0000000000000001" else '0';
|
|
ctr_ok := bo(4-2) or (ctr_not_zero xor bo(4-3));
|
|
cond_ok := bo(4-0) or crbit_match;
|
|
if ctr_ok = '1' and cond_ok = '1' then
|
|
ret := 1;
|
|
else
|
|
ret := 0;
|
|
end if;
|
|
return ret;
|
|
end;
|
|
|
|
function ppc_bcctr_taken(bo, bi: std_ulogic_vector(4 downto 0); cr: std_ulogic_vector(31 downto 0)) return integer is
|
|
variable crfield: integer;
|
|
variable crbit_match: std_ulogic;
|
|
variable cond_ok: std_ulogic;
|
|
variable ret: integer;
|
|
begin
|
|
crfield := to_integer(unsigned(bi));
|
|
-- BE bit numbering
|
|
crbit_match := '1' when cr(31-crfield) = bo(4-1) else '0';
|
|
cond_ok := bo(4-0) or crbit_match;
|
|
if cond_ok = '1' then
|
|
ret := 1;
|
|
else
|
|
ret := 0;
|
|
end if;
|
|
return ret;
|
|
end;
|
|
end package body ppc_fx_insns;
|