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Scaffolding for 32-bit ModRM decoding

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Jeff Parsons 2015-01-20 22:13:40 -08:00 • committed by jeffpar
commit 7cdf097c8d
9 changed files with 22819 additions and 2522 deletions
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23
modules/pcjs/lib/x86cpu.js
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@ -46,6 +46,9 @@ if (typeof module !== 'undefined') {
var X86Help = require("./x86help");
var X86ModB = require("./x86modb");
var X86ModW = require("./x86modw");
var X86ModB32 = require("./x86modb32");
var X86ModW32 = require("./x86modw32");
var X86ModSIB = require("./x86modsib");
var X86OpXX = require("./x86opxx");
var X86Op0F = require("./x86op0f");
}
@ -2318,7 +2321,7 @@ X86CPU.prototype.getIPByte = function()
{
var b = (PREFETCH? this.getBytePrefetch(this.regLIP) : this.getByte(this.regLIP));
if (BACKTRACK) this.bus.updateBackTrackCode(this.regLIP, this.backTrack.btiMemLo);
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 1) & 0xffff); // this.advanceIP(1)
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 1) & 0xffff); // this.advanceIP(1)
return b;
};
@ -2332,7 +2335,7 @@ X86CPU.prototype.getIPDisp = function()
{
var b = ((PREFETCH? this.getBytePrefetch(this.regLIP) : this.getByte(this.regLIP)) << 24) >> 24;
if (BACKTRACK) this.bus.updateBackTrackCode(this.regLIP, this.backTrack.btiMemLo);
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 1) & 0xffff); // this.advanceIP(1)
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 1) & 0xffff); // this.advanceIP(1)
return b & 0xffff;
};
@ -2349,10 +2352,24 @@ X86CPU.prototype.getIPWord = function()
this.bus.updateBackTrackCode(this.regLIP, this.backTrack.btiMemLo);
this.bus.updateBackTrackCode(this.regLIP + 1, this.backTrack.btiMemHi);
}
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 2) & 0xffff); // this.advanceIP(2)
this.regLIP = this.segCS.base + (this.regEIP = (this.regEIP + 2) & 0xffff); // this.advanceIP(2)
return w;
};
/**
* getSIB(mod)
*
* @this {X86CPU}
* @param {number} mod
* @return {number}
*/
X86CPU.prototype.getSIB = function(mod)
{
var b = PREFETCH? this.getBytePrefetch(this.regLIP) : this.getByte(this.regLIP);
if (BACKTRACK) this.bus.updateBackTrackCode(this.regLIP, this.backTrack.btiMemLo);
return X86ModSIB.aOpModSIB[b].call(this, mod);
};
/**
* popWord()
*