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Added placeholders for IBTS and XBTS (80386 opcodes on A0-B0 steppings only)

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This commit is contained in:
Jeff Parsons 2015-10-29 22:44:33 -07:00
commit 8bd1794928
7 changed files with 139 additions and 75 deletions
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5
modules/pcjs/lib/x86ops.js
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@ -2952,9 +2952,10 @@ X86.opSTOSb = function STOSb()
* only EDI in the case of STOS. The other instructions mentioned below monkey with different
* registers, so read the errata carefully.
*
* TODO: Extend this errata to STOSW, as well as MOVSB, MOVSW, INSB, and INSW.
* TODO: Extend this errata to STOSW, as well as MOVSB, MOVSW, INSB, and INSW. Also, scope out the
* extent to which this errara also existed on earlier steppings.
*/
if (this.model == X86.MODEL_80386 && this.stepping == X86.STEPPING_B1) {
if (this.stepping == X86.STEPPING_80386_B1) {
if (!(this.opPrefixes & X86.OPFLAG.ADDRSIZE) != (this.getByte(this.regLIP) != X86.OPCODE.AS)) {
maskAddr ^= (0xffff0000|0);
}