Retro/pcem
Watch
1
0
Fork
You've already forked pcem
 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

Added quick hack to FCOMPP to fix 80387 detection. Quake (and presumably some other stuff) works in Windows again.

Browse source
This commit is contained in:
TomW 2013-12-15 15:41:29 +00:00
commit 6c631adc7e
1 changed files with 6 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

8
src/x87.c
View file

@ -1237,8 +1237,12 @@ void x87_de()
case 0xD9: /*FCOMPP*/ case 0xD9: /*FCOMPP*/
if (fplog) pclog("FCOMPP %f %f\n", ST(0), ST(1)); if (fplog) pclog("FCOMPP %f %f\n", ST(0), ST(1));
npxs&=~(C0|C2|C3); npxs&=~(C0|C2|C3);
if (ST(0)==ST(1)) npxs|=C3; if (*(uint64_t *)&ST(0) == ((uint64_t)1 << 63) && *(uint64_t *)&ST(1) == 0)
else if (ST(0)<ST(1)) npxs|=C0; npxs |= C0; /*Nasty hack to fix 80387 detection*/
else if (ST(0) == ST(1))
npxs |= C3;
else if (ST(0) < ST(1))
npxs |= C0;
x87_pop(); x87_pop();
x87_pop(); x87_pop();
cycles-=5; cycles-=5;