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Tweak DIV timing for Cyrix 486es. Improves Cyrix 486 CPU speed detection on SiS496/497.

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This commit is contained in:
SarahW 2018-04-20 10:58:43 +01:00
commit 8a1cef9851
1 changed files with 8 additions and 8 deletions
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16
src/x86_ops_misc.h
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@ -114,8 +114,8 @@ static int opF6_a16(uint32_t fetchdat)
x86_int(0);
return 1;
}
CLOCK_CYCLES(is486 ? 16 : 14);
PREFETCH_RUN(is486 ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
CLOCK_CYCLES((is486 && !cpu_iscyrix) ? 16 : 14);
PREFETCH_RUN((is486 && !cpu_iscyrix) ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x38: /*IDIV AL,b*/
tempws = (int)(int16_t)AX;
@ -214,8 +214,8 @@ static int opF6_a32(uint32_t fetchdat)
x86_int(0);
return 1;
}
CLOCK_CYCLES(is486 ? 16 : 14);
PREFETCH_RUN(is486 ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
CLOCK_CYCLES((is486 && !cpu_iscyrix) ? 16 : 14);
PREFETCH_RUN((is486 && !cpu_iscyrix) ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x38: /*IDIV AL,b*/
tempws = (int)(int16_t)AX;
@ -316,8 +316,8 @@ static int opF7_w_a16(uint32_t fetchdat)
x86_int(0);
return 1;
}
CLOCK_CYCLES(is486 ? 24 : 22);
PREFETCH_RUN(is486 ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
CLOCK_CYCLES((is486 && !cpu_iscyrix) ? 24 : 22);
PREFETCH_RUN((is486 && !cpu_iscyrix) ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x38: /*IDIV AX,w*/
tempws = (int)((DX << 16)|AX);
@ -410,8 +410,8 @@ static int opF7_w_a32(uint32_t fetchdat)
x86_int(0);
return 1;
}
CLOCK_CYCLES(is486 ? 24 : 22);
PREFETCH_RUN(is486 ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
CLOCK_CYCLES((is486 && !cpu_iscyrix) ? 24 : 22);
PREFETCH_RUN((is486 && !cpu_iscyrix) ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x38: /*IDIV AX,w*/
tempws = (int)((DX << 16)|AX);