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Added prefetch timing approximation for 286/386 CPUs, with configurable memory timing.

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This commit is contained in:
SarahW 2016-11-25 21:32:02 +00:00
commit 1b73963997
33 changed files with 1139 additions and 261 deletions
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57
src/x86_ops_misc.h
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@ -2,30 +2,35 @@ static int opCBW(uint32_t fetchdat)
{
AH = (AL & 0x80) ? 0xff : 0;
CLOCK_CYCLES(3);
PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
return 0;
}
static int opCWDE(uint32_t fetchdat)
{
EAX = (AX & 0x8000) ? (0xffff0000 | AX) : AX;
CLOCK_CYCLES(3);
PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
return 0;
}
static int opCWD(uint32_t fetchdat)
{
DX = (AX & 0x8000) ? 0xFFFF : 0;
CLOCK_CYCLES(2);
PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
return 0;
}
static int opCDQ(uint32_t fetchdat)
{
EDX = (EAX & 0x80000000) ? 0xffffffff : 0;
CLOCK_CYCLES(2);
PREFETCH_RUN(2, 1, -1, 0,0,0,0, 0);
return 0;
}
static int opNOP(uint32_t fetchdat)
{
CLOCK_CYCLES((is486) ? 1 : 3);
PREFETCH_RUN(3, 1, -1, 0,0,0,0, 0);
return 0;
}
@ -33,6 +38,7 @@ static int opSETALC(uint32_t fetchdat)
{
AL = (CF_SET()) ? 0xff : 0;
CLOCK_CYCLES(timing_rr);
PREFETCH_RUN(timing_rr, 1, -1, 0,0,0,0, 0);
return 0;
}
@ -54,15 +60,18 @@ static int opF6_a16(uint32_t fetchdat)
setznp8(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 3, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x10: /*NOT b*/
seteab(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x18: /*NEG b*/
seteab(0 - dst); if (cpu_state.abrt) return 1;
setsub8(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x20: /*MUL AL,b*/
AX = AL * dst;
@ -70,6 +79,7 @@ static int opF6_a16(uint32_t fetchdat)
if (AH) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(13);
PREFETCH_RUN(13, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x28: /*IMUL AL,b*/
tempws = (int)((int8_t)AL) * (int)((int8_t)dst);
@ -78,6 +88,7 @@ static int opF6_a16(uint32_t fetchdat)
if (((int16_t)AX >> 7) != 0 && ((int16_t)AX >> 7) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(14);
PREFETCH_RUN(14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x30: /*DIV AL,b*/
src16 = AX;
@ -98,6 +109,7 @@ static int opF6_a16(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(is486 ? 16 : 14);
PREFETCH_RUN(is486 ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x38: /*IDIV AL,b*/
tempws = (int)(int16_t)AX;
@ -120,6 +132,7 @@ static int opF6_a16(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(19);
PREFETCH_RUN(19, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
default:
@ -144,15 +157,18 @@ static int opF6_a32(uint32_t fetchdat)
setznp8(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 3, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x10: /*NOT b*/
seteab(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x18: /*NEG b*/
seteab(0 - dst); if (cpu_state.abrt) return 1;
setsub8(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x20: /*MUL AL,b*/
AX = AL * dst;
@ -160,6 +176,7 @@ static int opF6_a32(uint32_t fetchdat)
if (AH) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(13);
PREFETCH_RUN(13, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x28: /*IMUL AL,b*/
tempws = (int)((int8_t)AL) * (int)((int8_t)dst);
@ -168,6 +185,7 @@ static int opF6_a32(uint32_t fetchdat)
if (((int16_t)AX >> 7) != 0 && ((int16_t)AX >> 7) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(14);
PREFETCH_RUN(14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x30: /*DIV AL,b*/
src16 = AX;
@ -188,6 +206,7 @@ static int opF6_a32(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(is486 ? 16 : 14);
PREFETCH_RUN(is486 ? 16 : 14, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x38: /*IDIV AL,b*/
tempws = (int)(int16_t)AX;
@ -210,6 +229,7 @@ static int opF6_a32(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(19);
PREFETCH_RUN(19, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
default:
@ -237,15 +257,18 @@ static int opF7_w_a16(uint32_t fetchdat)
setznp16(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 4, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x10: /*NOT w*/
seteaw(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x18: /*NEG w*/
seteaw(0 - dst); if (cpu_state.abrt) return 1;
setsub16(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 0);
break;
case 0x20: /*MUL AX,w*/
templ = AX * dst;
@ -255,6 +278,7 @@ static int opF7_w_a16(uint32_t fetchdat)
if (DX) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(21);
PREFETCH_RUN(21, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x28: /*IMUL AX,w*/
templ = (int)((int16_t)AX) * (int)((int16_t)dst);
@ -264,6 +288,7 @@ static int opF7_w_a16(uint32_t fetchdat)
if (((int32_t)templ >> 15) != 0 && ((int32_t)templ >> 15) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(22);
PREFETCH_RUN(22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x30: /*DIV AX,w*/
templ = (DX << 16) | AX;
@ -281,6 +306,7 @@ static int opF7_w_a16(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(is486 ? 24 : 22);
PREFETCH_RUN(is486 ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
case 0x38: /*IDIV AX,w*/
tempws = (int)((DX << 16)|AX);
@ -299,6 +325,7 @@ static int opF7_w_a16(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(27);
PREFETCH_RUN(27, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 0);
break;
default:
@ -323,15 +350,18 @@ static int opF7_w_a32(uint32_t fetchdat)
setznp16(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 4, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x10: /*NOT w*/
seteaw(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x18: /*NEG w*/
seteaw(0 - dst); if (cpu_state.abrt) return 1;
setsub16(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mm);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, (cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1,0, 1);
break;
case 0x20: /*MUL AX,w*/
templ = AX * dst;
@ -341,6 +371,7 @@ static int opF7_w_a32(uint32_t fetchdat)
if (DX) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(21);
PREFETCH_RUN(21, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x28: /*IMUL AX,w*/
templ = (int)((int16_t)AX) * (int)((int16_t)dst);
@ -350,6 +381,7 @@ static int opF7_w_a32(uint32_t fetchdat)
if (((int32_t)templ >> 15) != 0 && ((int32_t)templ >> 15) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(22);
PREFETCH_RUN(22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x30: /*DIV AX,w*/
templ = (DX << 16) | AX;
@ -367,6 +399,7 @@ static int opF7_w_a32(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(is486 ? 24 : 22);
PREFETCH_RUN(is486 ? 24 : 22, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
case 0x38: /*IDIV AX,w*/
tempws = (int)((DX << 16)|AX);
@ -385,6 +418,7 @@ static int opF7_w_a32(uint32_t fetchdat)
return 1;
}
CLOCK_CYCLES(27);
PREFETCH_RUN(27, 2, rmdat, (cpu_mod == 3) ? 0:1,0,0,0, 1);
break;
default:
@ -409,15 +443,18 @@ static int opF7_l_a16(uint32_t fetchdat)
setznp32(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 5, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
case 0x10: /*NOT l*/
seteal(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 0);
break;
case 0x18: /*NEG l*/
seteal(0 - dst); if (cpu_state.abrt) return 1;
setsub32(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 0);
break;
case 0x20: /*MUL EAX,l*/
temp64 = (uint64_t)EAX * (uint64_t)dst;
@ -427,6 +464,7 @@ static int opF7_l_a16(uint32_t fetchdat)
if (EDX) flags |= (C_FLAG|V_FLAG);
else flags &= ~(C_FLAG|V_FLAG);
CLOCK_CYCLES(21);
PREFETCH_RUN(21, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
case 0x28: /*IMUL EAX,l*/
temp64 = (int64_t)(int32_t)EAX * (int64_t)(int32_t)dst;
@ -436,18 +474,21 @@ static int opF7_l_a16(uint32_t fetchdat)
if (((int64_t)temp64 >> 31) != 0 && ((int64_t)temp64 >> 31) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(38);
PREFETCH_RUN(38, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
case 0x30: /*DIV EAX,l*/
if (divl(dst))
return 1;
if (!cpu_iscyrix) setznp32(EAX); /*Not a Cyrix*/
CLOCK_CYCLES((is486) ? 40 : 38);
PREFETCH_RUN(is486 ? 40:38, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
case 0x38: /*IDIV EAX,l*/
if (idivl((int32_t)dst))
return 1;
if (!cpu_iscyrix) setznp32(EAX); /*Not a Cyrix*/
CLOCK_CYCLES(43);
PREFETCH_RUN(43, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 0);
break;
default:
@ -471,15 +512,18 @@ static int opF7_l_a32(uint32_t fetchdat)
setznp32(src & dst);
if (is486) CLOCK_CYCLES((cpu_mod == 3) ? 1 : 2);
else CLOCK_CYCLES((cpu_mod == 3) ? 2 : 5);
PREFETCH_RUN((cpu_mod == 3) ? 2 : 5, 5, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
case 0x10: /*NOT l*/
seteal(~dst); if (cpu_state.abrt) return 1;
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 1);
break;
case 0x18: /*NEG l*/
seteal(0 - dst); if (cpu_state.abrt) return 1;
setsub32(0, dst);
CLOCK_CYCLES((cpu_mod == 3) ? timing_rr : timing_mml);
PREFETCH_RUN((cpu_mod == 3) ? timing_rr : timing_mm, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,(cpu_mod == 3) ? 0:1, 1);
break;
case 0x20: /*MUL EAX,l*/
temp64 = (uint64_t)EAX * (uint64_t)dst;
@ -489,6 +533,7 @@ static int opF7_l_a32(uint32_t fetchdat)
if (EDX) flags |= (C_FLAG|V_FLAG);
else flags &= ~(C_FLAG|V_FLAG);
CLOCK_CYCLES(21);
PREFETCH_RUN(21, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
case 0x28: /*IMUL EAX,l*/
temp64 = (int64_t)(int32_t)EAX * (int64_t)(int32_t)dst;
@ -498,18 +543,21 @@ static int opF7_l_a32(uint32_t fetchdat)
if (((int64_t)temp64 >> 31) != 0 && ((int64_t)temp64 >> 31) != -1) flags |= (C_FLAG | V_FLAG);
else flags &= ~(C_FLAG | V_FLAG);
CLOCK_CYCLES(38);
PREFETCH_RUN(38, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
case 0x30: /*DIV EAX,l*/
if (divl(dst))
return 1;
if (!cpu_iscyrix) setznp32(EAX); /*Not a Cyrix*/
CLOCK_CYCLES((is486) ? 40 : 38);
PREFETCH_RUN(is486 ? 40 : 38, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
case 0x38: /*IDIV EAX,l*/
if (idivl((int32_t)dst))
return 1;
if (!cpu_iscyrix) setznp32(EAX); /*Not a Cyrix*/
CLOCK_CYCLES(43);
PREFETCH_RUN(43, 2, rmdat, 0,(cpu_mod == 3) ? 0:1,0,0, 1);
break;
default:
@ -536,7 +584,8 @@ static int opHLT(uint32_t fetchdat)
CLOCK_CYCLES(5);
CPU_BLOCK_END();
PREFETCH_RUN(100, 1, -1, 0,0,0,0, 0);
return 0;
}
@ -548,6 +597,7 @@ static int opLOCK(uint32_t fetchdat)
cpu_state.pc++;
CLOCK_CYCLES(4);
PREFETCH_PREFIX();
return x86_opcodes[(fetchdat & 0xff) | cpu_state.op32](fetchdat >> 8);
}
@ -569,6 +619,7 @@ static int opBOUND_w_a16(uint32_t fetchdat)
}
CLOCK_CYCLES(is486 ? 7 : 10);
PREFETCH_RUN(is486 ? 7 : 10, 2, rmdat, 2,0,0,0, 0);
return 0;
}
static int opBOUND_w_a32(uint32_t fetchdat)
@ -587,6 +638,7 @@ static int opBOUND_w_a32(uint32_t fetchdat)
}
CLOCK_CYCLES(is486 ? 7 : 10);
PREFETCH_RUN(is486 ? 7 : 10, 2, rmdat, 2,0,0,0, 1);
return 0;
}
@ -606,6 +658,7 @@ static int opBOUND_l_a16(uint32_t fetchdat)
}
CLOCK_CYCLES(is486 ? 7 : 10);
PREFETCH_RUN(is486 ? 7 : 10, 2, rmdat, 1,1,0,0, 0);
return 0;
}
static int opBOUND_l_a32(uint32_t fetchdat)
@ -624,6 +677,7 @@ static int opBOUND_l_a32(uint32_t fetchdat)
}
CLOCK_CYCLES(is486 ? 7 : 10);
PREFETCH_RUN(is486 ? 7 : 10, 2, rmdat, 1,1,0,0, 1);
return 0;
}
@ -638,6 +692,7 @@ static int opCLTS(uint32_t fetchdat)
}
cr0 &= ~8;
CLOCK_CYCLES(5);
PREFETCH_RUN(5, 1, -1, 0,0,0,0, 0);
return 0;
}