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v1.17.0: Widening registers

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This commit is contained in:
Jeff Parsons 2015-01-19 22:32:15 -08:00 • committed by jeffpar
commit 1ede9acf15
133 changed files with 20419 additions and 19923 deletions
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36
modules/pcjs/lib/x86help.js
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@ -353,28 +353,28 @@ var X86Help = {
//
switch (this.bModRM & 0x7) {
case 0x0: // AL
this.regAX = (this.regAX & ~0xff) | dst;
this.regEAX = (this.regEAX & ~0xff) | dst;
break;
case 0x1: // CL
this.regCX = (this.regCX & ~0xff) | dst;
this.regECX = (this.regECX & ~0xff) | dst;
break;
case 0x2: // DL
this.regDX = (this.regDX & ~0xff) | dst;
this.regEDX = (this.regEDX & ~0xff) | dst;
break;
case 0x3: // BL
this.regBX = (this.regBX & ~0xff) | dst;
this.regEBX = (this.regEBX & ~0xff) | dst;
break;
case 0x4: // AH
this.regAX = (this.regAX & 0xff) | (dst << 8);
this.regEAX = (this.regEAX & 0xff) | (dst << 8);
break;
case 0x5: // CH
this.regCX = (this.regCX & 0xff) | (dst << 8);
this.regECX = (this.regECX & 0xff) | (dst << 8);
break;
case 0x6: // DH
this.regDX = (this.regDX & 0xff) | (dst << 8);
this.regEDX = (this.regEDX & 0xff) | (dst << 8);
break;
case 0x7: // BH
this.regBX = (this.regBX & 0xff) | (dst << 8);
this.regEBX = (this.regEBX & 0xff) | (dst << 8);
break;
default:
break; // there IS no other case, but JavaScript inspections don't know that
@ -415,28 +415,28 @@ var X86Help = {
//
switch (this.bModRM & 0x7) {
case 0x0: // AX
this.regAX = dst;
this.regEAX = dst;
break;
case 0x1: // CX
this.regCX = dst;
this.regECX = dst;
break;
case 0x2: // DX
this.regDX = dst;
this.regEDX = dst;
break;
case 0x3: // BX
this.regBX = dst;
this.regEBX = dst;
break;
case 0x4: // SP
this.regSP = dst;
this.regESP = dst;
break;
case 0x5: // BP
this.regBP = dst;
this.regEBP = dst;
break;
case 0x6: // SI
this.regSI = dst;
this.regESI = dst;
break;
case 0x7: // DI
this.regDI = dst;
this.regEDI = dst;
break;
default:
break; // there IS no other case, but JavaScript inspections don't know that
@ -508,9 +508,9 @@ var X86Help = {
opHelpRETF: function(n) {
var regIP = this.popWord();
var regCS = this.popWord();
if (n) this.regSP = (this.regSP + n) & 0xffff;
if (n) this.regESP = (this.regESP + n) & 0xffff;
if (this.setCSIP(regIP, regCS, false)) {
if (n) this.regSP = (this.regSP + n) & 0xffff;
if (n) this.regESP = (this.regESP + n) & 0xffff;
/*
* As per Intel documentation: "If any of [the DS or ES] registers refer to segments whose DPL is
* less than the new CPL (excluding conforming code segments), the segment register is loaded with