RaySollium99/picodrive
1
0
Fork 0
mirror of https://github.com/RaySollium99/picodrive.git synced 2025-09-05 15:27:46 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

cleanup and microoptimizations in SH2 hw handling

Browse source
This commit is contained in:
kub 2019-08-31 17:37:18 +02:00
parent f740428b81
commit fe344bd3d8
12 changed files with 308 additions and 247 deletions
Download patch file Download diff file Expand all files Collapse all files

4
cpu/drc/emit_mips.c
View file

@ -560,8 +560,8 @@ static void emith_set_arith_flags(int rd, int rt, int rs, s32 imm, int sub)
#define emith_adc_r_r(d, s) \
emith_adc_r_r_r(d, d, s)
// NB: the incoming C can cause its own outgoing C if s2+C=0 (or s1+C=0 FWIW)
// moreover, s2 is 0 if there is C, so no other C can be generated.
// NB: the incoming carry Cin can cause Cout if s2+Cin=0 (or s1+Cin=0 FWIW)
// moreover, if s2+Cin=0 caused Cout, s1+s2+Cin=s1+0 can't cause another Cout
#define emith_adcf_r_r_r(d, s1, s2) do { \
emith_add_r_r_r(FNZ, s2, FC); \
EMIT(MIPS_SLTU_REG(AT, FNZ, FC)); \