cores
/
microwatt
mirror of https://github.com/antonblanchard/microwatt
3
1
Fork 1
Code Issues Projects Releases Wiki Activity

FPU: Simplify IDLE state code

Browse Source 
Do more decoding of the instruction ahead of the IDLE state
processing so that the IDLE state code becomes much simpler.
To make the decoding easier, we now use four insn_type_t codes for
floating-point operations rather than two.  This also rearranges the
insn_type_t values a little to get the 4 FP opcode values to differ
only in the bottom 2 bits, and put OP_DIV, OP_DIVE and OP_MOD next to
them.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
pull/382/head
Paul Mackerras 2 years ago
parent 8da05e5331
commit 932da4c114
7 changed files with 236 additions and 218 deletions
Show Stats Download Patch File Download Diff File

8
common.vhdl
Unescape Escape View File

@ -317,6 +317,9 @@ package common is
read_data1: std_ulogic_vector(63 downto 0);
read_data2: std_ulogic_vector(63 downto 0);
read_data3: std_ulogic_vector(63 downto 0);
reg_valid1: std_ulogic;
reg_valid2: std_ulogic;
reg_valid3: std_ulogic;
cr: std_ulogic_vector(31 downto 0);
xerc: xer_common_t;
lr: std_ulogic;
@ -363,6 +366,7 @@ package common is
is_32bit => '0', is_signed => '0', xerc => xerc_init, reserve => '0', br_pred => '0',
byte_reverse => '0', sign_extend => '0', update => '0', nia => (others => '0'),
read_data1 => (others => '0'), read_data2 => (others => '0'), read_data3 => (others => '0'),
reg_valid1 => '0', reg_valid2 => '0', reg_valid3 => '0',
cr => (others => '0'), insn => (others => '0'), data_len => (others => '0'),
result_sel => "000", sub_select => "000",
repeat => '0', second => '0', spr_select => spr_id_init,
@ -671,6 +675,9 @@ package common is
fra : std_ulogic_vector(63 downto 0);
frb : std_ulogic_vector(63 downto 0);
frc : std_ulogic_vector(63 downto 0);
valid_a : std_ulogic;
valid_b : std_ulogic;
valid_c : std_ulogic;
frt : gspr_index_t;
rc : std_ulogic;
m32b : std_ulogic;
@ -684,6 +691,7 @@ package common is
insn => (others => '0'), fe_mode => "00", rc => '0',
fra => (others => '0'), frb => (others => '0'),
frc => (others => '0'), frt => (others => '0'),
valid_a => '0', valid_b => '0', valid_c => '0',
single => '0', is_signed => '0', out_cr => '0',
m32b => '0', oe => '0', xerc => xerc_init,
stall => '0');

112
decode1.vhdl
Unescape Escape View File

@ -443,18 +443,18 @@ architecture behaviour of decode1 is
constant decode_op_59_array : op_59_subop_array_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#01110# => (FPU, FPU, OP_FPOP_I, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fcfid[u]s
2#10010# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fdivs
2#10100# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fsubs
2#10101# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fadds
2#10110# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fsqrts
2#11000# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fres
2#11001# => (FPU, FPU, OP_FPOP, FRA, NONE, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fmuls
2#11010# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- frsqrtes
2#11100# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fmsubs
2#11101# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fmadds
2#11110# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fnmsubs
2#11111# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '1', '0', RC, '0', '0', NONE), -- fnmadds
2#01110# => (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), -- fcfid[u]s
2#10010# => (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#10100# => (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#10101# => (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#10110# => (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#11000# => (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#11001# => (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#11010# => (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#11100# => (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#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), -- fmadds
2#11110# => (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#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
others => illegal_inst
);

@ -470,38 +470,38 @@ architecture behaviour of decode1 is
constant decode_op_63l_array : op_63_subop_array_0_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#000000000# => (FPU, FPU, OP_FPOP, 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#000000001# => (FPU, FPU, OP_FPOP, 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#000000010# => (FPU, FPU, OP_FPOP, 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#000000100# => (FPU, FPU, OP_FPOP, 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#000000101# => (FPU, FPU, OP_FPOP, 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#011000001# => (FPU, FPU, OP_FPOP, 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#011000010# => (FPU, FPU, OP_FPOP, 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#011000100# => (FPU, FPU, OP_FPOP, 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#011011010# => (FPU, FPU, OP_FPOP_I, 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#011011110# => (FPU, FPU, OP_FPOP_I, 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#011110010# => (FPU, FPU, OP_FPOP_I, 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#011110110# => (FPU, FPU, OP_FPOP_I, 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#100000000# => (FPU, FPU, OP_FPOP, 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#100000001# => (FPU, FPU, OP_FPOP, 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#100000010# => (FPU, FPU, OP_FPOP, 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#100000100# => (FPU, FPU, OP_FPOP, 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#100001000# => (FPU, FPU, OP_FPOP, 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#100001100# => (FPU, FPU, OP_FPOP, 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#100001101# => (FPU, FPU, OP_FPOP, 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#100001110# => (FPU, FPU, OP_FPOP, 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#100001111# => (FPU, FPU, OP_FPOP, 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#110000000# => (FPU, FPU, OP_FPOP, 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#111000000# => (FPU, FPU, OP_FPOP, 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#111000100# => (FPU, FPU, OP_FPOP, 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#111011001# => (FPU, FPU, OP_FPOP, 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#111011010# => (FPU, FPU, OP_FPOP_I, 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#111011101# => (FPU, FPU, OP_FPOP, 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#111011110# => (FPU, FPU, OP_FPOP_I, 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#111100000# => (FPU, FPU, OP_FPOP, 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#111100100# => (FPU, FPU, OP_FPOP, 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#111111001# => (FPU, FPU, OP_FPOP, 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#111111101# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- 29/15=fctiduz
2#000000000# => (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#000000001# => (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#000000010# => (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#000000100# => (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#000000101# => (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#011000001# => (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#011000010# => (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#011000100# => (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#011011010# => (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#011011110# => (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#011110010# => (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#011110110# => (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#100000000# => (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#100000001# => (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#100000010# => (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#100000100# => (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#100001000# => (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#100001100# => (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#100001101# => (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#100001110# => (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#100001111# => (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#110000000# => (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#111000000# => (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#111000100# => (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#111011001# => (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#111011010# => (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#111011101# => (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#111011110# => (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#111100000# => (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#111100100# => (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#111111001# => (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#111111101# => (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
);

@ -509,18 +509,18 @@ architecture behaviour of decode1 is
constant decode_op_63h_array : op_63_subop_array_1_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#0010# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fdiv
2#0100# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fsub
2#0101# => (FPU, FPU, OP_FPOP, FRA, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fadd
2#0110# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fsqrt
2#0111# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fsel
2#1000# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fre
2#1001# => (FPU, FPU, OP_FPOP, FRA, NONE, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fmul
2#1010# => (FPU, FPU, OP_FPOP, NONE, FRB, NONE, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- frsqrte
2#1100# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fmsub
2#1101# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fmadd
2#1110# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fnmsub
2#1111# => (FPU, FPU, OP_FPOP, FRA, FRB, FRC, FRT, '0', '0', '0', '0', ZERO, '0', NONE, '0', '0', '0', '0', '0', '0', RC, '0', '0', NONE), -- fnmadd
2#0010# => (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#0100# => (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#0101# => (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#0110# => (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#0111# => (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#1000# => (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#1001# => (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#1010# => (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#1100# => (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#1101# => (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#1110# => (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#1111# => (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
);


20
decode2.vhdl
Unescape Escape View File

@ -58,10 +58,6 @@ architecture behaviour of decode2 is
busy : std_ulogic;
sgl_pipe : std_ulogic;
prev_sgl : std_ulogic;
reg_a_valid : std_ulogic;
reg_b_valid : std_ulogic;
reg_c_valid : std_ulogic;
reg_o_valid : std_ulogic;
input_ov : std_ulogic;
output_ov : std_ulogic;
read_rspr : std_ulogic;
@ -450,11 +446,6 @@ begin
when others =>
end case;

v.reg_a_valid := decoded_reg_a.reg_valid;
v.reg_b_valid := decoded_reg_b.reg_valid;
v.reg_c_valid := decoded_reg_c.reg_valid;
v.reg_o_valid := decoded_reg_o.reg_valid;

if d_in.decode.lr = '1' then
v.e.lr := insn_lk(d_in.insn);
-- b and bc have even major opcodes; bcreg is considered absolute
@ -542,6 +533,9 @@ begin
v.e.read_reg1 := d_in.reg_a;
v.e.read_reg2 := d_in.reg_b;
v.e.read_reg3 := d_in.reg_c;
v.e.reg_valid1 := decoded_reg_a.reg_valid;
v.e.reg_valid2 := decoded_reg_b.reg_valid;
v.e.reg_valid3 := decoded_reg_c.reg_valid;
v.e.write_reg := decoded_reg_o.reg;
v.e.write_reg_enable := decoded_reg_o.reg_valid;
v.e.invert_a := d_in.decode.invert_a;
@ -583,16 +577,16 @@ begin
control_valid_in <= valid_in;
control_serialize <= v.sgl_pipe or v.prev_sgl;

gpr_write_valid <= v.reg_o_valid;
gpr_write_valid <= v.e.write_reg_enable;
gpr_write <= v.e.write_reg;

gpr_a_read_valid <= v.reg_a_valid;
gpr_a_read_valid <= v.e.reg_valid1;
gpr_a_read <= v.e.read_reg1;

gpr_b_read_valid <= v.reg_b_valid;
gpr_b_read_valid <= v.e.reg_valid2;
gpr_b_read <= v.e.read_reg2;

gpr_c_read_valid <= v.reg_c_valid;
gpr_c_read_valid <= v.e.reg_valid3;
gpr_c_read <= v.e.read_reg3;

cr_write_valid <= v.e.output_cr or v.e.rc;

14
decode_types.vhdl
Unescape Escape View File

@ -4,14 +4,16 @@ use ieee.std_logic_1164.all;
package decode_types is
type insn_type_t is (OP_ILLEGAL, OP_NOP, OP_ADD,
OP_AND, OP_ATTN, OP_B, OP_BC, OP_BCREG,
OP_BPERM, OP_CMP, OP_CMPB, OP_CMPEQB, OP_CMPRB,
OP_BCD, OP_BPERM, OP_CMP, OP_CMPB, OP_CMPEQB, OP_CMPRB,
OP_CNTZ, OP_CROP,
OP_DARN, OP_DCBF, OP_DCBST, OP_DCBT, OP_DCBTST,
OP_DCBZ, OP_DIV, OP_DIVE, OP_EXTS, OP_EXTSWSLI,
OP_FPOP, OP_FPOP_I,
OP_ICBI, OP_ICBT, OP_ISEL, OP_ISYNC,
OP_DCBZ, OP_ICBI, OP_ICBT,
OP_FP_CMP, OP_FP_ARITH, OP_FP_MOVE, OP_FP_MISC,
OP_DIV, OP_DIVE, OP_MOD,
OP_EXTS, OP_EXTSWSLI,
OP_ISEL, OP_ISYNC,
OP_LOAD, OP_STORE,
OP_MCRXRX, OP_MFCR, OP_MFMSR, OP_MFSPR, OP_MOD,
OP_MCRXRX, OP_MFCR, OP_MFMSR, OP_MFSPR,
OP_MTCRF, OP_MTMSRD, OP_MTSPR, OP_MUL_L64,
OP_MUL_H64, OP_MUL_H32, OP_OR,
OP_POPCNT, OP_PRTY, OP_RFID,
@ -19,7 +21,7 @@ package decode_types is
OP_SHL, OP_SHR,
OP_SYNC, OP_TLBIE, OP_TRAP,
OP_XOR,
OP_BCD, OP_ADDG6S,
OP_ADDG6S,
OP_FETCH_FAILED
);
type input_reg_a_t is (NONE, RA, RA_OR_ZERO, CIA, FRA);

3
execute1.vhdl
Unescape Escape View File

@ -1590,6 +1590,9 @@ begin
fv.fra := a_in;
fv.frb := b_in;
fv.frc := c_in;
fv.valid_a := e_in.reg_valid1;
fv.valid_b := e_in.reg_valid2;
fv.valid_c := e_in.reg_valid3;
fv.frt := e_in.write_reg;
fv.rc := e_in.rc;
fv.out_cr := e_in.output_cr;

283
fpu.vhdl
Unescape Escape View File

@ -40,6 +40,7 @@ architecture behaviour of fpu is
type fpu_reg_type is record
class : fp_number_class;
negative : std_ulogic;
denorm : std_ulogic;
exponent : signed(EXP_BITS-1 downto 0); -- unbiased
mantissa : std_ulogic_vector(63 downto 0); -- 8.56 format
end record;
@ -52,6 +53,7 @@ architecture behaviour of fpu is
DO_FADD, DO_FMUL, DO_FDIV, DO_FSQRT, DO_FMADD,
DO_FRE, DO_FRSQRTE,
DO_FSEL,
DO_IDIVMOD,
FRI_1,
ADD_1, ADD_SHIFT, ADD_2, ADD_3,
CMP_1, CMP_2,
@ -76,7 +78,6 @@ architecture behaviour of fpu is
RENORM_B, RENORM_B2,
RENORM_C, RENORM_C2,
NAN_RESULT, EXC_RESULT,
DO_IDIVMOD,
IDIV_NORMB, IDIV_NORMB2, IDIV_NORMB3,
IDIV_CLZA, IDIV_CLZA2, IDIV_CLZA3,
IDIV_NR0, IDIV_NR1, IDIV_NR2, IDIV_USE0_5,
@ -89,6 +90,9 @@ architecture behaviour of fpu is
IDIV_EXTDIV4, IDIV_EXTDIV5, IDIV_EXTDIV6,
IDIV_MODADJ, IDIV_MODSUB, IDIV_DIVADJ, IDIV_OVFCHK, IDIV_DONE, IDIV_ZERO);

type decode32 is array(0 to 31) of state_t;
type decode8 is array(0 to 7) of state_t;

type reg_type is record
state : state_t;
busy : std_ulogic;
@ -103,6 +107,7 @@ architecture behaviour of fpu is
dest_fpr : gspr_index_t;
fe_mode : std_ulogic;
rc : std_ulogic;
fp_rc : std_ulogic;
is_cmp : std_ulogic;
single_prec : std_ulogic;
sp_result : std_ulogic;
@ -281,6 +286,48 @@ architecture behaviour of fpu is
signal rs_neg2 : std_ulogic;
signal rs_norm : std_ulogic;

constant arith_decode : decode32 := (
-- indexed by bits 5..1 of opcode
2#01000# => DO_FRI,
2#01100# => DO_FRSP,
2#01110# => DO_FCTI,
2#01111# => DO_FCTI,
2#10010# => DO_FDIV,
2#10100# => DO_FADD,
2#10101# => DO_FADD,
2#10110# => DO_FSQRT,
2#11000# => DO_FRE,
2#11001# => DO_FMUL,
2#11010# => DO_FRSQRTE,
2#11100# => DO_FMADD,
2#11101# => DO_FMADD,
2#11110# => DO_FMADD,
2#11111# => DO_FMADD,
others => DO_ILLEGAL
);

constant cmp_decode : decode8 := (
2#000# => DO_FCMP,
2#001# => DO_FCMP,
2#010# => DO_MCRFS,
2#100# => DO_FTDIV,
2#101# => DO_FTSQRT,
others => DO_ILLEGAL
);

constant misc_decode : decode32 := (
-- indexed by bits 10, 8, 4, 2, 1 of opcode
2#00010# => DO_MTFSB,
2#01010# => DO_MTFSFI,
2#10010# => DO_FMRG,
2#11010# => DO_FMRG,
2#10011# => DO_MFFS,
2#11011# => DO_MTFSF,
2#10110# => DO_FCFID,
2#11110# => DO_FCFID,
others => DO_ILLEGAL
);

-- Inverse lookup table, indexed by the top 8 fraction bits
-- The first 256 entries are the reciprocal (1/x) lookup table,
-- and the remaining 768 entries are the reciprocal square root table.
@ -503,7 +550,7 @@ architecture behaviour of fpu is

-- Split a DP floating-point number into components and work out its class.
-- If is_int = 1, the input is considered an integer
function decode_dp(fpr: std_ulogic_vector(63 downto 0); is_int: std_ulogic;
function decode_dp(fpr: std_ulogic_vector(63 downto 0); is_fp: std_ulogic;
is_32bint: std_ulogic; is_signed: std_ulogic) return fpu_reg_type is
variable reg : fpu_reg_type;
variable exp_nz : std_ulogic;
@ -513,11 +560,13 @@ architecture behaviour of fpu is
variable cls : std_ulogic_vector(2 downto 0);
begin
reg.negative := fpr(63);
reg.denorm := '0';
exp_nz := or (fpr(62 downto 52));
exp_ao := and (fpr(62 downto 52));
frac_nz := or (fpr(51 downto 0));
low_nz := or (fpr(31 downto 0));
if is_int = '0' then
if is_fp = '1' then
reg.denorm := frac_nz and not exp_nz;
reg.exponent := signed(resize(unsigned(fpr(62 downto 52)), EXP_BITS)) - to_signed(1023, EXP_BITS);
if exp_nz = '0' then
reg.exponent := to_signed(-1022, EXP_BITS);
@ -735,7 +784,9 @@ begin
variable fpscr_mask : std_ulogic_vector(31 downto 0);
variable j, k : integer;
variable flm : std_ulogic_vector(7 downto 0);
variable int_input : std_ulogic;
variable fpin_a : std_ulogic;
variable fpin_b : std_ulogic;
variable fpin_c : std_ulogic;
variable is_32bint : std_ulogic;
variable mask : std_ulogic_vector(63 downto 0);
variable in_a0 : std_ulogic_vector(63 downto 0);
@ -795,14 +846,16 @@ begin
variable rexp_sum : signed(EXP_BITS-1 downto 0);
variable rsh_in1 : signed(EXP_BITS-1 downto 0);
variable rsh_in2 : signed(EXP_BITS-1 downto 0);
variable exec_state : state_t;
variable opcbits : std_ulogic_vector(4 downto 0);
variable int_result : std_ulogic;
variable illegal : std_ulogic;
begin
v := r;
v.complete := '0';
v.do_intr := '0';
int_input := '0';
is_32bint := '0';
exec_state := IDLE;

if r.complete = '1' or r.do_intr = '1' then
v.instr_done := '0';
@ -823,6 +876,7 @@ begin
v.single_prec := e_in.single;
v.is_signed := e_in.is_signed;
v.rc := e_in.rc;
v.fp_rc := '0';
v.is_cmp := e_in.out_cr;
v.oe := e_in.oe;
v.m32b := e_in.m32b;
@ -831,36 +885,79 @@ begin
v.integer_op := '0';
v.divext := '0';
v.divmod := '0';
if e_in.op = OP_FPOP or e_in.op = OP_FPOP_I then
v.longmask := e_in.single;
if e_in.op = OP_FPOP_I then
int_input := '1';
end if;
else -- OP_DIV, OP_DIVE, OP_MOD
v.integer_op := '1';
int_input := '1';
is_32bint := e_in.single;
if e_in.op = OP_DIVE then
v.is_sqrt := '0';
v.is_multiply := '0';
fpin_a := '0';
fpin_b := '0';
fpin_c := '0';
v.use_a := e_in.valid_a;
v.use_b := e_in.valid_b;
v.use_c := e_in.valid_c;
v.round_mode := '0' & r.fpscr(FPSCR_RN+1 downto FPSCR_RN);
case e_in.op is
when OP_FP_ARITH =>
fpin_a := e_in.valid_a;
fpin_b := e_in.valid_b;
fpin_c := e_in.valid_c;
v.longmask := e_in.single;
v.fp_rc := e_in.rc;
exec_state := arith_decode(to_integer(unsigned(e_in.insn(5 downto 1))));
if e_in.insn(5 downto 1) = "11001" or e_in.insn(5 downto 3) = "111" then
v.is_multiply := '1';
end if;
if e_in.insn(5 downto 1) = "10110" or e_in.insn(5 downto 1) = "11010" then
v.is_sqrt := '1';
end if;
if e_in.insn(5 downto 1) = "01111" then
v.round_mode := "001";
end if;
when OP_FP_CMP =>
fpin_a := e_in.valid_a;
fpin_b := e_in.valid_b;
exec_state := cmp_decode(to_integer(unsigned(e_in.insn(8 downto 6))));
when OP_FP_MISC =>
v.fp_rc := e_in.rc;
opcbits := e_in.insn(10) & e_in.insn(8) & e_in.insn(4) & e_in.insn(2) & e_in.insn(1);
exec_state := misc_decode(to_integer(unsigned(opcbits)));
when OP_FP_MOVE =>
v.fp_rc := e_in.rc;
fpin_a := e_in.valid_a;
fpin_b := e_in.valid_b;
fpin_c := e_in.valid_c;
if e_in.insn(5) = '0' then
exec_state := DO_FMR;
else
exec_state := DO_FSEL;
end if;
when OP_DIV =>
v.integer_op := '1';
is_32bint := e_in.single;
exec_state := DO_IDIVMOD;
when OP_DIVE =>
v.integer_op := '1';
v.divext := '1';
elsif e_in.op = OP_MOD then
is_32bint := e_in.single;
exec_state := DO_IDIVMOD;
when OP_MOD =>
v.integer_op := '1';
v.divmod := '1';
end if;
end if;
is_32bint := e_in.single;
exec_state := DO_IDIVMOD;
when others =>
exec_state := DO_ILLEGAL;
end case;
v.quieten_nan := '1';
v.tiny := '0';
v.denorm := '0';
v.round_mode := '0' & r.fpscr(FPSCR_RN+1 downto FPSCR_RN);
v.is_subtract := '0';
v.is_multiply := '0';
v.is_sqrt := '0';
v.add_bsmall := '0';
v.doing_ftdiv := "00";
v.int_ovf := '0';
v.div_close := '0';

adec := decode_dp(e_in.fra, int_input, is_32bint, e_in.is_signed);
bdec := decode_dp(e_in.frb, int_input, is_32bint, e_in.is_signed);
cdec := decode_dp(e_in.frc, int_input, '0', '0');
adec := decode_dp(e_in.fra, fpin_a, is_32bint, e_in.is_signed);
bdec := decode_dp(e_in.frb, fpin_b, is_32bint, e_in.is_signed);
cdec := decode_dp(e_in.frc, fpin_c, '0', '0');
v.a := adec;
v.b := bdec;
v.c := cdec;
@ -996,110 +1093,36 @@ begin

case r.state is
when IDLE =>
v.use_a := '0';
v.use_b := '0';
v.use_c := '0';
v.invalid := '0';
v.negate := '0';
if e_in.valid = '1' then
v.opsel_a := AIN_B;
v.busy := '1';
case e_in.insn(5 downto 1) is
when "00000" =>
if e_in.insn(8) = '1' then
if e_in.insn(6) = '0' then
v.state := DO_FTDIV;
else
v.state := DO_FTSQRT;
if e_in.op = OP_FP_ARITH and e_in.valid_a = '1' and
(e_in.valid_b = '0' or e_in.valid_c = '0') then
v.opsel_a := AIN_A;
end if;
if e_in.op = OP_FP_ARITH then
-- input selection for denorm cases
case e_in.insn(5 downto 1) is
when "10010" => -- fdiv
if v.b.mantissa(UNIT_BIT) = '0' and v.a.mantissa(UNIT_BIT) = '1' then
v.opsel_a := AIN_B;
end if;
elsif e_in.insn(7) = '1' then
v.state := DO_MCRFS;
else
v.opsel_a := AIN_B;
v.state := DO_FCMP;
end if;
when "00110" =>
if e_in.insn(10) = '0' then
if e_in.insn(8) = '0' then
v.state := DO_MTFSB;
else
v.state := DO_MTFSFI;
when "11001" => -- fmul
if v.c.mantissa(UNIT_BIT) = '0' and v.a.mantissa(UNIT_BIT) = '1' then
v.opsel_a := AIN_C;
end if;
else
v.state := DO_FMRG;
end if;
when "00111" =>
if e_in.insn(8) = '0' then
v.state := DO_MFFS;
else
v.state := DO_MTFSF;
end if;
when "01000" =>
v.opsel_a := AIN_B;
if e_in.insn(9 downto 8) /= "11" then
v.state := DO_FMR;
else
v.state := DO_FRI;
end if;
when "01001" | "01011" =>
-- integer divides and mods, major opcode 31
v.opsel_a := AIN_B;
v.state := DO_IDIVMOD;
when "01100" =>
v.opsel_a := AIN_B;
v.state := DO_FRSP;
when "01110" =>
v.opsel_a := AIN_B;
if int_input = '1' then
-- fcfid[u][s]
v.state := DO_FCFID;
else
v.state := DO_FCTI;
end if;
when "01111" =>
v.round_mode := "001";
v.opsel_a := AIN_B;
v.state := DO_FCTI;
when "10010" =>
v.opsel_a := AIN_A;
if v.b.mantissa(UNIT_BIT) = '0' and v.a.mantissa(UNIT_BIT) = '1' then
v.opsel_a := AIN_B;
end if;
v.state := DO_FDIV;
when "10100" | "10101" =>
v.opsel_a := AIN_A;
v.state := DO_FADD;
when "10110" =>
v.is_sqrt := '1';
v.opsel_a := AIN_B;
v.state := DO_FSQRT;
when "10111" =>
v.state := DO_FSEL;
when "11000" =>
v.opsel_a := AIN_B;
v.state := DO_FRE;
when "11001" =>
v.is_multiply := '1';
v.opsel_a := AIN_A;
if v.c.mantissa(UNIT_BIT) = '0' and v.a.mantissa(UNIT_BIT) = '1' then
v.opsel_a := AIN_C;
end if;
v.state := DO_FMUL;
when "11010" =>
v.is_sqrt := '1';
v.opsel_a := AIN_B;
v.state := DO_FRSQRTE;
when "11100" | "11101" | "11110" | "11111" =>
if v.a.mantissa(UNIT_BIT) = '0' then
v.opsel_a := AIN_A;
elsif v.c.mantissa(UNIT_BIT) = '0' then
v.opsel_a := AIN_C;
else
v.opsel_a := AIN_B;
end if;
v.state := DO_FMADD;
when others =>
v.state := DO_ILLEGAL;
end case;
when "11100" | "11101" | "11110" | "11111" => -- fmadd etc.
if v.a.mantissa(UNIT_BIT) = '0' then
v.opsel_a := AIN_A;
elsif v.c.mantissa(UNIT_BIT) = '0' then
v.opsel_a := AIN_C;
end if;
when others =>
end case;
end if;
v.state := exec_state;
end if;
v.x := '0';
v.old_exc := r.fpscr(FPSCR_VX downto FPSCR_XX);
@ -1444,8 +1467,6 @@ begin
rs_sel2 <= RSH2_A;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_a := '1';
v.use_b := '1';
is_add := r.a.negative xor r.b.negative xor r.insn(1);
if r.a.class = FINITE and r.b.class = FINITE then
v.is_subtract := not is_add;
@ -1493,8 +1514,6 @@ begin
v.result_class := r.a.class;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_a := '1';
v.use_c := '1';
re_sel1 <= REXP1_A;
re_sel2 <= REXP2_C;
re_set_result <= '1';
@ -1532,8 +1551,6 @@ begin
v.result_class := r.a.class;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_a := '1';
v.use_b := '1';
v.result_sign := r.a.negative xor r.b.negative;
re_sel1 <= REXP1_A;
re_sel2 <= REXP2_B;
@ -1594,7 +1611,6 @@ begin
v.result_sign := r.b.negative;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_b := '1';
re_sel2 <= REXP2_B;
re_set_result <= '1';
case r.b.class is
@ -1631,7 +1647,6 @@ begin
v.result_sign := r.b.negative;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_b := '1';
re_sel2 <= REXP2_B;
re_set_result <= '1';
case r.b.class is
@ -1658,7 +1673,6 @@ begin
v.result_sign := r.b.negative;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_b := '1';
re_sel2 <= REXP2_B;
re_set_result <= '1';
-- set shift to 1
@ -1705,9 +1719,6 @@ begin
rs_sel1 <= RSH1_B;
v.fpscr(FPSCR_FR) := '0';
v.fpscr(FPSCR_FI) := '0';
v.use_a := '1';
v.use_b := '1';
v.use_c := '1';
is_add := r.a.negative xor r.c.negative xor r.b.negative xor r.insn(1);
if r.a.class = FINITE and r.c.class = FINITE and
(r.b.class = FINITE or r.b.class = ZERO) then
@ -1769,7 +1780,7 @@ begin
when RENORM_A =>
rs_norm <= '1';
v.state := RENORM_A2;
if r.insn(4) = '1' then
if r.use_c = '1' and r.c.denorm = '1' then
v.opsel_a := AIN_C;
else
v.opsel_a := AIN_B;
@ -3532,7 +3543,7 @@ begin
v.state := IDLE;
v.busy := '0';
v.f2stall := '0';
if r.rc = '1' and (r.op = OP_FPOP or r.op = OP_FPOP_I) then
if r.fp_rc = '1' then
v.cr_result := v.fpscr(FPSCR_FX downto FPSCR_OX);
end if;
v.sp_result := r.single_prec;

14
scripts/fmt_log/fmt_log.c
Unescape Escape View File

@ -88,13 +88,13 @@ const char *units[4] = { "--", "al", "ls", "fp" };
const char *ops[64] =
{
"illegal", "nop ", "add ", "and ", "attn ", "b ", "bc ", "bcreg ",
"bperm ", "cmp ", "cmpb ", "cmpeqb ", "cmprb ", "cntz ", "crop ", "darn ",
"dcbf ", "dcbst ", "dcbt ", "dcbtst ", "dcbz ", "div ", "dive ", "exts ",
"extswsl", "fpop ", "fpopi ", "icbi ", "icbt ", "isel ", "isync ", "ld ",
"st ", "mcrxrx ", "mfcr ", "mfmsr ", "mfspr ", "mod ", "mtcrf ", "mtmsr ",
"mtspr ", "mull64 ", "mulh64 ", "mulh32 ", "or ", "popcnt ", "prty ", "rfid ",
"rlc ", "rlcl ", "rlcr ", "sc ", "setb ", "shl ", "shr ", "sync ",
"tlbie ", "trap ", "xor ", "bcd ", "addg6s ", "ffail ", "?62 ", "?63 "
"bcd ", "bperm ", "cmp ", "cmpb ", "cmpeqb ", "cmprb ", "cntz ", "crop ",
"darn ", "dcbf ", "dcbst ", "dcbt ", "dcbtst ", "dcbz ", "icbi ", "icbt ",
"fpcmp ", "fparith", "fpmove ", "fpmisc ", "div ", "dive ", "mod ", "exts ",
"extswsl", "isel ", "isync ", "ld ", "st ", "mcrxrx ", "mfcr ", "mfmsr ",
"mfspr ", "mtcrf ", "mtmsr ", "mtspr ", "mull64 ", "mulh64 ", "mulh32 ", "or ",
"popcnt ", "prty ", "rfid ", "rlc ", "rlcl ", "rlcr ", "sc ", "setb ",
"shl ", "shr ", "sync ", "tlbie ", "trap ", "xor ", "addg6s ", "ffail ",
};

const char *spr_names[13] =

Write Preview
Loading…
Cancel
Save