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Change how optional opcode tables are built

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This commit is contained in:
Jeff Parsons 2015-03-26 16:56:37 -07:00 • committed by jeffpar
commit e3a5408031
10 changed files with 145 additions and 104 deletions
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10
modules/pcjs/lib/x86cpu.js
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@ -761,13 +761,15 @@ X86CPU.prototype.initProcessor = function()
this.aOps[X86.OPCODE.PUSHSP] = X86.opPUSHSP;
if (I386 && this.model >= X86.MODEL_80386) {
var bOpcode;
this.aOps[X86.OPCODE.FS] = X86.opFS;
this.aOps[X86.OPCODE.GS] = X86.opGS;
this.aOps[X86.OPCODE.OS] = X86.opOS;
this.aOps[X86.OPCODE.AS] = X86.opAS;
this.aOps0F = X86.aOps0F.slice();
this.aOps0F[0x20] = X86.opMOVrcr;
this.aOps0F[0x22] = X86.opMOVcrr;
for (bOpcode in X86.aOps0F386) {
this.aOps0F[+bOpcode] = X86.aOps0F386[bOpcode];
}
/*
* Extend the opcode table by creating a mirror of the first 256 opcodes, but with dword-based
* opcode handlers (as defined in aOpsD) instead word-based opcode handlers. Whenever dataSize
@ -775,8 +777,8 @@ X86CPU.prototype.initProcessor = function()
* bOpcodeBias from 0 to 256.
*/
this.aOps = this.aOps.concat(this.aOps);
for (var bOpcode in X86.aOpsD) {
this.aOps[parseInt(bOpcode, 10) + 256] = X86.aOpsD[bOpcode];
for (bOpcode in X86.aOpsD) {
this.aOps[+bOpcode + 256] = X86.aOpsD[bOpcode];
}
}
}