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Flag conversion complete

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This commit is contained in:
Jeff Parsons 2015-03-16 17:16:40 -07:00 • committed by jeffpar
commit 56f362f8ac
8 changed files with 2817 additions and 3175 deletions
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1404
docs/pcjs/demos/pc-dbg.js
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1309
docs/pcjs/demos/pc.js
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7
modules/pcjs/lib/defines.js
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@ -117,13 +117,6 @@ var BUGS_8086 = false;
*/
var I386 = true;
/**
* @define {boolean}
*
* Retain support for old flags.
*/
var OLDFLAGS = true;
/**
* @define {boolean}
*

79
modules/pcjs/lib/x86cpu.js
View file

@ -1830,8 +1830,6 @@ X86CPU.prototype.getCarry = function()
*/
X86CPU.prototype.getCF = function()
{
var flag = (this.resultZeroCarry & this.resultSize)? X86.PS.CF : 0;
if (I386) {
if (this.resultType & X86.RESULT.CF) {
this.resultFlags &= ~X86.PS.CF;
if ((this.resultDst ^ ((this.resultDst ^ this.resultSrc) & (this.resultSrc ^ this.resultArith))) & (this.resultType & X86.RESULT.TYPE)) {
@ -1840,8 +1838,6 @@ X86CPU.prototype.getCF = function()
this.resultType &= ~X86.RESULT.CF;
}
return this.resultFlags & X86.PS.CF;
}
return flag;
};
/**
@ -1871,9 +1867,6 @@ X86CPU.prototype.getCF = function()
*/
X86CPU.prototype.getPF = function()
{
var flag = this.resultParitySign;
flag = ((0x6996 >> ((flag ^ (flag >> 4)) & 0xf)) & 1)? 0 : X86.PS.PF;
if (I386) {
if (this.resultType & X86.RESULT.PF) {
this.resultFlags &= ~X86.PS.PF;
if ((0x9669 >> ((this.resultLogic ^ (this.resultLogic >> 4)) & 0xf)) & 1) {
@ -1882,8 +1875,6 @@ X86CPU.prototype.getPF = function()
this.resultType &= ~X86.RESULT.PF;
}
return this.resultFlags & X86.PS.PF;
}
return flag;
};
/**
@ -1914,8 +1905,6 @@ X86CPU.prototype.getPF = function()
*/
X86CPU.prototype.getAF = function()
{
var flag = ((this.resultParitySign ^ this.resultAuxOverflow) & X86.RESULT.AUXOVF_AF)? X86.PS.AF : 0;
if (I386) {
if (this.resultType & X86.RESULT.AF) {
this.resultFlags &= ~X86.PS.AF;
if ((this.resultArith ^ (this.resultDst ^ this.resultSrc)) & X86.RESULT.AUXOVF_AF) {
@ -1924,8 +1913,6 @@ X86CPU.prototype.getAF = function()
this.resultType &= ~X86.RESULT.AF;
}
return this.resultFlags & X86.PS.AF;
}
return flag;
};
/**
@ -1936,8 +1923,6 @@ X86CPU.prototype.getAF = function()
*/
X86CPU.prototype.getZF = function()
{
var flag = (this.resultZeroCarry & (this.resultSize - 1))? 0 : X86.PS.ZF;
if (I386) {
if (this.resultType & X86.RESULT.ZF) {
this.resultFlags &= ~X86.PS.ZF;
if (!(this.resultLogic & (((this.resultType & X86.RESULT.TYPE) - 1) | (this.resultType & X86.RESULT.TYPE)))) {
@ -1946,8 +1931,6 @@ X86CPU.prototype.getZF = function()
this.resultType &= ~X86.RESULT.ZF;
}
return this.resultFlags & X86.PS.ZF;
}
return flag;
};
/**
@ -1958,8 +1941,6 @@ X86CPU.prototype.getZF = function()
*/
X86CPU.prototype.getSF = function()
{
var flag = (this.resultParitySign & (this.resultSize >> 1))? X86.PS.SF : 0;
if (I386) {
if (this.resultType & X86.RESULT.SF) {
this.resultFlags &= ~X86.PS.SF;
if (this.resultLogic & (this.resultType & X86.RESULT.TYPE)) {
@ -1968,8 +1949,6 @@ X86CPU.prototype.getSF = function()
this.resultType &= ~X86.RESULT.SF;
}
return this.resultFlags & X86.PS.SF;
}
return flag;
};
/**
@ -2004,8 +1983,6 @@ X86CPU.prototype.getSF = function()
*/
X86CPU.prototype.getOF = function()
{
var flag = ((this.resultParitySign ^ this.resultAuxOverflow ^ (this.resultParitySign >> 1)) & (this.resultSize >> 1))? X86.PS.OF : 0;
if (I386) {
if (this.resultType & X86.RESULT.OF) {
this.resultFlags &= ~X86.PS.OF;
if (((this.resultDst ^ this.resultArith) & (this.resultSrc ^ this.resultArith)) & (this.resultType & X86.RESULT.TYPE)) {
@ -2014,8 +1991,6 @@ X86CPU.prototype.getOF = function()
this.resultType &= ~X86.RESULT.OF;
}
return this.resultFlags & X86.PS.OF;
}
return flag;
};
/**
@ -2058,11 +2033,8 @@ X86CPU.prototype.getDF = function()
*/
X86CPU.prototype.clearCF = function()
{
this.resultZeroCarry &= ~this.resultSize;
if (I386) {
this.resultType &= ~X86.RESULT.CF;
this.resultFlags &= ~X86.PS.CF;
}
};
/**
@ -2072,11 +2044,8 @@ X86CPU.prototype.clearCF = function()
*/
X86CPU.prototype.clearPF = function()
{
if (this.getPF()) this.resultParitySign ^= 0x1;
if (I386) {
this.resultType &= ~X86.RESULT.PF;
this.resultFlags &= ~X86.PS.PF;
}
};
/**
@ -2086,11 +2055,8 @@ X86CPU.prototype.clearPF = function()
*/
X86CPU.prototype.clearAF = function()
{
this.resultAuxOverflow = (this.resultParitySign & X86.RESULT.AUXOVF_AF) | (this.resultAuxOverflow & ~X86.RESULT.AUXOVF_AF);
if (I386) {
this.resultType &= ~X86.RESULT.AF;
this.resultFlags &= ~X86.PS.AF;
}
};
/**
@ -2100,11 +2066,8 @@ X86CPU.prototype.clearAF = function()
*/
X86CPU.prototype.clearZF = function()
{
this.resultZeroCarry |= (this.resultSize - 1);
if (I386) {
this.resultType &= ~X86.RESULT.ZF;
this.resultFlags &= ~X86.PS.ZF;
}
};
/**
@ -2114,14 +2077,8 @@ X86CPU.prototype.clearZF = function()
*/
X86CPU.prototype.clearSF = function()
{
if (this.getSF()) {
this.resultParitySign ^= (this.resultSize >> 1) | (this.resultSize >> 2);
this.resultAuxOverflow ^= X86.RESULT.AUXOVF_OF;
}
if (I386) {
this.resultType &= ~X86.RESULT.SF;
this.resultFlags &= ~X86.PS.SF;
}
};
/**
@ -2151,12 +2108,8 @@ X86CPU.prototype.clearDF = function()
*/
X86CPU.prototype.clearOF = function()
{
this.resultParitySign &= ~this.resultSize;
this.resultAuxOverflow = (this.resultParitySign & X86.RESULT.AUXOVF_OF) | (this.resultAuxOverflow & ~X86.RESULT.AUXOVF_OF);
if (I386) {
this.resultType &= ~X86.RESULT.OF;
this.resultFlags &= ~X86.PS.OF;
}
};
/**
@ -2166,11 +2119,8 @@ X86CPU.prototype.clearOF = function()
*/
X86CPU.prototype.setCF = function()
{
this.resultZeroCarry |= this.resultSize;
if (I386) {
this.resultType &= ~X86.RESULT.CF;
this.resultFlags |= X86.PS.CF;
}
};
/**
@ -2180,11 +2130,8 @@ X86CPU.prototype.setCF = function()
*/
X86CPU.prototype.setPF = function()
{
if ((0x6996 >> ((this.resultParitySign ^ (this.resultParitySign >> 4)) & 0xf)) & 1) this.resultParitySign ^= 0x1;
if (I386) {
this.resultType &= ~X86.RESULT.PF;
this.resultFlags |= X86.PS.PF;
}
};
/**
@ -2194,11 +2141,8 @@ X86CPU.prototype.setPF = function()
*/
X86CPU.prototype.setAF = function()
{
this.resultAuxOverflow = ~(this.resultParitySign & X86.RESULT.AUXOVF_AF) & X86.RESULT.AUXOVF_AF | (this.resultAuxOverflow & ~X86.RESULT.AUXOVF_AF);
if (I386) {
this.resultType &= ~X86.RESULT.AF;
this.resultFlags |= X86.PS.AF;
}
};
/**
@ -2208,11 +2152,8 @@ X86CPU.prototype.setAF = function()
*/
X86CPU.prototype.setZF = function()
{
this.resultZeroCarry &= ~(this.resultSize - 1);
if (I386) {
this.resultType &= ~X86.RESULT.ZF;
this.resultFlags |= X86.PS.ZF;
}
};
/**
@ -2222,14 +2163,8 @@ X86CPU.prototype.setZF = function()
*/
X86CPU.prototype.setSF = function()
{
if (!(this.resultParitySign & (this.resultSize >> 1))) {
this.resultParitySign ^= (this.resultSize >> 1) | (this.resultSize >> 2);
this.resultAuxOverflow ^= X86.RESULT.AUXOVF_OF;
}
if (I386) {
this.resultType &= ~X86.RESULT.SF;
this.resultFlags |= X86.PS.SF;
}
};
/**
@ -2259,12 +2194,8 @@ X86CPU.prototype.setDF = function()
*/
X86CPU.prototype.setOF = function()
{
if (I386) {
this.resultType &= ~X86.RESULT.OF;
this.resultFlags |= X86.PS.OF;
}
this.resultParitySign |= this.resultSize;
this.resultAuxOverflow = (this.resultParitySign & X86.RESULT.AUXOVF_OF) | (this.resultAuxOverflow & ~X86.RESULT.AUXOVF_OF);
};
/**
@ -2317,16 +2248,6 @@ X86CPU.prototype.setPS = function(regPS, cpl)
this.resultType = X86.RESULT.BYTE;
this.resultFlags = regPS & (X86.PS.CF | X86.PS.PF | X86.PS.AF | X86.PS.ZF | X86.PS.SF | X86.PS.OF);
}
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = 0;
if (regPS & X86.PS.CF) this.setCF();
if (!(regPS & X86.PS.PF)) this.resultParitySign |= 0x1;
if (regPS & X86.PS.AF) this.resultAuxOverflow |= X86.RESULT.AUXOVF_AF;
if (!(regPS & X86.PS.ZF)) this.clearZF();
if (regPS & X86.PS.SF) this.setSF();
if (regPS & X86.PS.OF) this.setOF();
}
/*
* OS/2 1.0 discriminates between an 80286 and an 80386 based on whether an IRET in real-mode that

242
modules/pcjs/lib/x86func.js
View file

@ -48,14 +48,7 @@ if (typeof module !== 'undefined') {
X86.fnADCb = function ADCb(dst, src)
{
var b = (dst + src + this.getCarry())|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = b;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setArithResult(dst, src, b, X86.RESULT.BYTE | X86.RESULT.ALL);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b & 0xff;
};
@ -71,14 +64,7 @@ X86.fnADCb = function ADCb(dst, src)
X86.fnADCw = function ADCw(dst, src)
{
var w = (dst + src + this.getCarry())|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = w;
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(dst, src, w, X86.RESULT.WORD | X86.RESULT.ALL);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w & 0xffff;
};
@ -94,14 +80,7 @@ X86.fnADCw = function ADCw(dst, src)
X86.fnADDb = function ADDb(dst, src)
{
var b = (dst + src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = b;
}
if (I386) {
this.setArithResult(dst, src, b, X86.RESULT.BYTE | X86.RESULT.ALL);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b & 0xff;
};
@ -117,14 +96,7 @@ X86.fnADDb = function ADDb(dst, src)
X86.fnADDw = function ADDw(dst, src)
{
var w = (dst + src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = w;
}
if (I386) {
this.setArithResult(dst, src, w, X86.RESULT.WORD | X86.RESULT.ALL);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w & 0xffff;
};
@ -140,13 +112,7 @@ X86.fnADDw = function ADDw(dst, src)
X86.fnANDb = function ANDb(dst, src)
{
var b = dst & src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = b;
}
if (I386) {
this.setLogicResult(b, X86.RESULT.BYTE);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b;
};
@ -162,13 +128,7 @@ X86.fnANDb = function ANDb(dst, src)
X86.fnANDw = function ANDw(dst, src)
{
var w = dst & src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = w;
}
if (I386) {
this.setLogicResult(w, X86.RESULT.WORD);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w;
};
@ -311,14 +271,7 @@ X86.fnCALLFdw = function CALLFdw(dst, src)
X86.fnCMPb = function CMPb(dst, src)
{
var b = (dst - src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = b;
}
if (I386) {
this.setArithResult(dst, src, b, X86.RESULT.BYTE | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesCompareRM) : this.CYCLES.nOpCyclesArithRM);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -335,14 +288,7 @@ X86.fnCMPb = function CMPb(dst, src)
X86.fnCMPw = function CMPw(dst, src)
{
var w = (dst - src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = w;
}
if (I386) {
this.setArithResult(dst, src, w, X86.RESULT.WORD | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesCompareRM) : this.CYCLES.nOpCyclesArithRM);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -359,15 +305,7 @@ X86.fnCMPw = function CMPw(dst, src)
X86.fnDECb = function DECb(dst, src)
{
var b = (dst - 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultParitySign = b;
this.resultZeroCarry = (b & 0xff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 8);
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setArithResult(dst, 1, b, X86.RESULT.BYTE | X86.RESULT.NOTCF, true);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesIncR : this.CYCLES.nOpCyclesIncM);
return b & 0xff;
};
@ -382,15 +320,7 @@ X86.fnDECb = function DECb(dst, src)
X86.fnDECr = function DECr(w)
{
var result = ((w & this.dataMask) - 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = w;
this.resultParitySign = result;
this.resultZeroCarry = (result & 0xffff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 16);
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(w, 1, result, X86.RESULT.WORD | X86.RESULT.NOTCF, true);
}
this.nStepCycles -= 2; // the register form of INC takes 2 cycles on all CPUs
return (w & ~this.dataMask) | (result & this.dataMask);
};
@ -406,15 +336,7 @@ X86.fnDECr = function DECr(w)
X86.fnDECw = function DECw(dst, src)
{
var w = (dst - 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultParitySign = w;
this.resultZeroCarry = (w & 0xffff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 16);
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(dst, 1, w, X86.RESULT.WORD | X86.RESULT.NOTCF, true);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesIncR : this.CYCLES.nOpCyclesIncM);
return w & 0xffff;
};
@ -777,15 +699,7 @@ X86.fnIMULw = function IMULw(dst, src)
X86.fnINCb = function INCb(dst, src)
{
var b = (dst + 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultParitySign = b;
this.resultZeroCarry = (b & 0xff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 8);
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setArithResult(dst, 1, b, X86.RESULT.BYTE | X86.RESULT.NOTCF);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesIncR : this.CYCLES.nOpCyclesIncM);
return b & 0xff;
};
@ -800,15 +714,7 @@ X86.fnINCb = function INCb(dst, src)
X86.fnINCr = function INCr(w)
{
var result = ((w & this.dataMask) + 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = w;
this.resultParitySign = result;
this.resultZeroCarry = (result & 0xffff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 16);
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(w, 1, result, X86.RESULT.WORD | X86.RESULT.NOTCF);
}
this.nStepCycles -= 2; // the register form of INC takes 2 cycles on all CPUs
return (w & ~this.dataMask) | (result & this.dataMask);
};
@ -824,15 +730,7 @@ X86.fnINCr = function INCr(w)
X86.fnINCw = function INCw(dst, src)
{
var w = (dst + 1)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultParitySign = w;
this.resultZeroCarry = (w & 0xffff) | (((this.resultZeroCarry & this.resultSize)? 1 : 0) << 16);
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(dst, 1, w, X86.RESULT.WORD | X86.RESULT.NOTCF);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesIncR : this.CYCLES.nOpCyclesIncM);
return w & 0xffff;
};
@ -1241,15 +1139,12 @@ X86.fnMOVMD16 = function MOVMD16(dst, src)
*/
X86.fnMULb = function MULb(dst, src)
{
this.regEAX = this.regMD16 = (this.resultZeroCarry = (src = this.regEAX & 0xff) * dst) & 0xffff;
this.regEAX = this.regMD16 = ((src = this.regEAX & 0xff) * dst) & 0xffff;
if (this.regEAX & 0xff00) {
this.setCF(); this.setOF();
} else {
this.clearCF(); this.clearOF();
}
if (DEBUG) {
if (this.resultZeroCarry & (this.resultSize - 1)) this.clearZF(); else this.setZF();
}
/*
* Multiply/divide instructions specify only a single operand, which the decoders pass to us
* via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
@ -1272,16 +1167,14 @@ X86.fnMULb = function MULb(dst, src)
*/
X86.fnMULw = function MULw(dst, src)
{
this.regMD16 = this.regEAX = (this.resultZeroCarry = (src = this.regEAX) * dst) & 0xffff;
this.regMD32 = this.regEDX = (this.resultZeroCarry >> 16) & 0xffff;
var result = (src = this.regEAX) * dst;
this.regMD16 = this.regEAX = result & 0xffff;
this.regMD32 = this.regEDX = (result >> 16) & 0xffff;
if (this.regEDX) {
this.setCF(); this.setOF();
} else {
this.clearCF(); this.clearOF();
}
if (DEBUG) {
if (this.resultZeroCarry & (this.resultSize - 1)) this.clearZF(); else this.setZF();
}
/*
* Multiply/divide instructions specify only a single operand, which the decoders pass to us
* via the dst parameter, so we set src to the other implied operand (either AX or DX:AX).
@ -1305,14 +1198,7 @@ X86.fnMULw = function MULw(dst, src)
X86.fnNEGb = function NEGb(dst, src)
{
var b = (-dst)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = b;
}
if (I386) {
this.setArithResult(0, dst, b, X86.RESULT.BYTE | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesNegR : this.CYCLES.nOpCyclesNegM);
return b & 0xff;
};
@ -1328,14 +1214,7 @@ X86.fnNEGb = function NEGb(dst, src)
X86.fnNEGw = function NEGw(dst, src)
{
var w = (-dst)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst;
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = w;
}
if (I386) {
this.setArithResult(0, dst, w, X86.RESULT.WORD | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesNegR : this.CYCLES.nOpCyclesNegM);
return w & 0xffff;
};
@ -1379,13 +1258,7 @@ X86.fnNOTw = function NOTw(dst, src)
X86.fnORb = function ORb(dst, src)
{
var b = dst | src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = b;
}
if (I386) {
this.setLogicResult(b, X86.RESULT.BYTE);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b;
};
@ -1401,13 +1274,7 @@ X86.fnORb = function ORb(dst, src)
X86.fnORw = function ORw(dst, src)
{
var w = dst | src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = w;
}
if (I386) {
this.setLogicResult(w, X86.RESULT.WORD);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w;
};
@ -1811,14 +1678,7 @@ X86.fnSARw = function SARw(dst, src)
X86.fnSBBb = function SBBb(dst, src)
{
var b = (dst - src - this.getCarry())|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = b;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setArithResult(dst, src, b, X86.RESULT.BYTE | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b & 0xff;
};
@ -1834,14 +1694,7 @@ X86.fnSBBb = function SBBb(dst, src)
X86.fnSBBw = function SBBw(dst, src)
{
var w = (dst - src - this.getCarry())|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = w;
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(dst, src, w, X86.RESULT.WORD | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w & 0xffff;
};
@ -2107,14 +1960,7 @@ X86.fnSTR = function STR(dst, src)
X86.fnSUBb = function SUBb(dst, src)
{
var b = (dst - src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = b;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setArithResult(dst, src, b, X86.RESULT.BYTE | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b & 0xff;
};
@ -2130,14 +1976,7 @@ X86.fnSUBb = function SUBb(dst, src)
X86.fnSUBw = function SUBw(dst, src)
{
var w = (dst - src)|0;
if (OLDFLAGS) {
this.resultAuxOverflow = dst ^ src;
this.resultZeroCarry = this.resultParitySign = w;
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setArithResult(dst, src, w, X86.RESULT.WORD | X86.RESULT.ALL, true);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w & 0xffff;
};
@ -2153,13 +1992,7 @@ X86.fnSUBw = function SUBw(dst, src)
X86.fnTEST8 = function TEST8(dst, src)
{
src = this.getIPByte();
if (OLDFLAGS) {
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = dst & src;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setLogicResult(dst & src, X86.RESULT.BYTE);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesTestRI : this.CYCLES.nOpCyclesTestMI);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -2176,13 +2009,7 @@ X86.fnTEST8 = function TEST8(dst, src)
X86.fnTEST16 = function TEST16(dst, src)
{
src = this.getIPWord();
if (OLDFLAGS) {
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = dst & src;
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setLogicResult(dst & src, X86.RESULT.WORD);
}
this.nStepCycles -= (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesTestRI : this.CYCLES.nOpCyclesTestMI);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -2198,13 +2025,7 @@ X86.fnTEST16 = function TEST16(dst, src)
*/
X86.fnTESTb = function TESTb(dst, src)
{
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = dst & src;
}
if (I386) {
this.setLogicResult(dst & src, X86.RESULT.BYTE);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesTestRR : this.CYCLES.nOpCyclesTestRM) : this.CYCLES.nOpCyclesTestRM);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -2220,13 +2041,7 @@ X86.fnTESTb = function TESTb(dst, src)
*/
X86.fnTESTw = function TESTw(dst, src)
{
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = dst & src;
}
if (I386) {
this.setLogicResult(dst & src, X86.RESULT.WORD);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesTestRR : this.CYCLES.nOpCyclesTestRM) : this.CYCLES.nOpCyclesTestRM);
this.opFlags |= X86.OPFLAG.NOWRITE;
return dst;
@ -2458,13 +2273,7 @@ X86.fnXCHGrw = function XCHGRw(dst, src)
X86.fnXORb = function XORb(dst, src)
{
var b = dst ^ src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = b;
}
if (I386) {
this.setLogicResult(b, X86.RESULT.BYTE);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return b;
};
@ -2480,13 +2289,7 @@ X86.fnXORb = function XORb(dst, src)
X86.fnXORw = function XORw(dst, src)
{
var w = dst ^ src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = w;
}
if (I386) {
this.setLogicResult(w, X86.RESULT.WORD);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return w;
};
@ -2499,43 +2302,8 @@ X86.fnXORw = function XORw(dst, src)
*/
X86.fnXORd = function XORd(dst, src)
{
var d = dst ^ src;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_WORD;
this.resultParitySign = this.resultAuxOverflow = d;
this.resultZeroCarry = ((d >>> 16) | (d & 0xffff));
}
if (I386) {
this.setLogicResult(d, X86.RESULT.DWORD);
}
this.nStepCycles -= (this.regEAWrite === X86.ADDR_INVALID? (this.regEA === X86.ADDR_INVALID? this.CYCLES.nOpCyclesArithRR : this.CYCLES.nOpCyclesArithRM) : this.CYCLES.nOpCyclesArithMR);
return d;
};
/**
* All the rotate instructions (RCL, RCR, ROL, ROR) affect only CARRY and OVERFLOW. This means that in the process
* of updating CARRY and OVERFLOW (and possibly changing resultSize from SIZE_BYTE to SIZE_WORD, or vice versa),
* we must take care to preserve SIGN, ZERO, and the other arithmetic flags.
*
* However, in the interest of efficiency, rather than changing resultSize to match the operand size, it's easier
* to leave resultSize as-is and simply set CARRY and OVERFLOW based on the previous resultSize, since there isn't
* actually any requirement or dependency (that I can think of) that resultSize always reflect the operand size of
* the last operation. Since only 2 of the 6 arithmetic flags need to change, that tips the scales in favor of leaving
* resultSize alone.
*
* NOTE: Although I've yet to find confirmation of this for the 8086/8088, OVERFLOW is "undefined" on modern x86
* CPUs for shift counts > 1 (in fact, on modern CPUs, OVERFLOW tends to be clear in those situations). Since I set
* OVERFLOW the same way for all shift counts, my "well-defined" behavior may or may not match the 8086/8088, but
* until I see a defined behavior (or more importantly, some dependency on a different behavior), this seems good enough.
*
* @this {X86CPU}
* @param {number} result (untruncated, so that we can inspect it for CARRY and OVERFLOW)
* @param {number} size
*/
X86.fnRotateFlags = function(result, size)
{
this.resultZeroCarry = (this.resultZeroCarry & (this.resultSize - 1)) | ((result & size)? this.resultSize : 0);
if ((result ^ (result >> 1)) & (size >> 1)) this.setOF(); else this.clearOF();
return this.setLogicResult(dst ^ src, X86.RESULT.DWORD);
};
/**

42
modules/pcjs/lib/x86opxx.js
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@ -593,13 +593,7 @@ X86.opDAA = function DAA()
}
var b = (AL & 0xff);
this.regEAX = (this.regEAX & ~0xff) | b;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = b;
}
if (I386) {
this.setLogicResult(b, X86.RESULT.BYTE);
}
if (CF) this.setCF(); else this.clearCF();
if (AF) this.setAF(); else this.clearAF();
this.nStepCycles -= this.CYCLES.nOpCyclesAAA; // AAA and DAA have the same cycle times
@ -715,13 +709,7 @@ X86.opDAS = function DAS()
}
var b = (AL & 0xff);
this.regEAX = (this.regEAX & ~0xff) | b;
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = b;
}
if (I386) {
this.setLogicResult(b, X86.RESULT.BYTE);
}
if (CF) this.setCF(); else this.clearCF();
if (AF) this.setAF(); else this.clearAF();
this.nStepCycles -= this.CYCLES.nOpCyclesAAA; // AAA and DAS have the same cycle times
@ -2808,14 +2796,7 @@ X86.opCMPSw = function CMPSw()
*/
X86.opTESTALb = function TESTALb()
{
var src = this.getIPByte();
if (OLDFLAGS) {
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = this.regEAX & src;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
this.setLogicResult(this.regEAX & src, X86.RESULT.BYTE);
}
this.setLogicResult(this.regEAX & this.getIPByte(), X86.RESULT.BYTE);
this.nStepCycles -= this.CYCLES.nOpCyclesAAA;
};
@ -2826,14 +2807,7 @@ X86.opTESTALb = function TESTALb()
*/
X86.opTESTAXw = function TESTAXw()
{
var src = this.getIPWord();
if (OLDFLAGS) {
this.resultZeroCarry = this.resultParitySign = this.resultAuxOverflow = this.regEAX & src;
this.resultSize = X86.RESULT.SIZE_WORD;
}
if (I386) {
this.setLogicResult(this.regEAX & src, X86.RESULT.WORD);
}
this.setLogicResult(this.regEAX & this.getIPWord(), X86.RESULT.WORD);
this.nStepCycles -= this.CYCLES.nOpCyclesAAA;
};
@ -3569,16 +3543,10 @@ X86.opAAM = function AAM()
}
var AL = this.regEAX & 0xff;
this.regEAX = (this.regEAX & ~0xffff) | ((AL / bDivisor) << 8) | (AL % bDivisor);
if (OLDFLAGS) {
this.resultSize = X86.RESULT.SIZE_BYTE;
this.resultZeroCarry = this.resultParitySign = this.regEAX;
}
if (I386) {
/*
* setLogicResult() is slightly overkill, because technically, we don't need to clear CF and OF....
*/
this.setLogicResult(this.regEAX, X86.RESULT.BYTE);
}
this.nStepCycles -= this.CYCLES.nOpCyclesAAM;
};
@ -3596,16 +3564,10 @@ X86.opAAD = function AAD()
{
var bMultiplier = this.getIPByte();
this.regEAX = (this.regEAX & ~0xffff) | (((((this.regEAX >> 8) & 0xff) * bMultiplier) + this.regEAX) & 0xff);
if (OLDFLAGS) {
this.resultZeroCarry = this.resultParitySign = this.regEAX;
this.resultSize = X86.RESULT.SIZE_BYTE;
}
if (I386) {
/*
* setLogicResult() is slightly overkill, because technically, we don't need to clear CF and OF....
*/
this.setLogicResult(this.regEAX, X86.RESULT.BYTE);
}
this.nStepCycles -= this.CYCLES.nOpCyclesAAD;
};

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1309
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