claunia/86Box
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Fixed IDIV on 286+ again, fixes Windows 95.

Browse Source
This commit is contained in:
OBattler
2017-12-14 04:38:33 +01:00
parent 28426e53af
commit 67cc1b42e6
2 changed files with 37 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
src/cpu/386_dynarec.c
View File

@@ -463,17 +463,18 @@ int divl(uint32_t val)
}
int idivl(int32_t val)
{
uint64_t tempsrc;
int64_t tempws, tempws2 = 0;
uint64_t templ;
int64_t tempsrc, tempws, tempws2 = 0;
if (val == 0) {
divexcp(); /* Divide by zero. */
return 1;
}
tempsrc = (uint64_t) EDX;
tempsrc = (tempsrc << 32) | EAX;
tempws = ((int64_t)tempsrc) / ((int64_t)((int32_t)val));
templ = (uint64_t) EDX;
templ = (templ << 32) | EAX;
tempsrc = (int64_t) templ;
tempws = tempsrc / val;
if ((tempws > 2147483647LL) || (tempws < -2147483648LL)) {
divexcp();
@@ -481,10 +482,10 @@ int idivl(int32_t val)
}
tempws = (int32_t) tempws;
tempws2 = (int32_t) ((int64_t)tempsrc) % ((int64_t)((int32_t)val));
tempws2 = (int32_t) (templ % val);
DX = (uint32_t) tempws2;
AX = (uint32_t) tempws;
EDX = (int32_t) tempws2;
EAX = (int32_t) tempws;
return 0;
}