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Cleaned up conditional jump handling

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Jeff Parsons 2015-05-04 19:26:06 -07:00 • committed by jeffpar
commit 2784934491
10 changed files with 135 additions and 50 deletions
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18
modules/pcjs/lib/x86ops.js
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@ -3497,6 +3497,10 @@ X86.opESC = function ESC()
/**
* op=0xE0 (LOOPNZ disp)
*
* NOTE: All the instructions in this group (LOOPNZ, LOOPZ, LOOP, and JCXZ) actually
* rely on the ADDRESS override setting for determining whether CX or ECX will be used,
* even though it seems counter-intuitive; ditto for the REP prefix.
*
* @this {X86CPU}
*/
X86.opLOOPNZ = function LOOPNZ()
@ -3513,6 +3517,10 @@ X86.opLOOPNZ = function LOOPNZ()
/**
* op=0xE1 (LOOPZ disp)
*
* NOTE: All the instructions in this group (LOOPNZ, LOOPZ, LOOP, and JCXZ) actually
* rely on the ADDRESS override setting for determining whether CX or ECX will be used,
* even though it seems counter-intuitive; ditto for the REP prefix.
*
* @this {X86CPU}
*/
X86.opLOOPZ = function LOOPZ()
@ -3529,6 +3537,10 @@ X86.opLOOPZ = function LOOPZ()
/**
* op=0xE2 (LOOP disp)
*
* NOTE: All the instructions in this group (LOOPNZ, LOOPZ, LOOP, and JCXZ) actually
* rely on the ADDRESS override setting for determining whether CX or ECX will be used,
* even though it seems counter-intuitive; ditto for the REP prefix.
*
* @this {X86CPU}
*/
X86.opLOOP = function LOOP()
@ -3543,7 +3555,11 @@ X86.opLOOP = function LOOP()
};
/**
* op=0xE3 (JCXZ disp)
* op=0xE3 (JCXZ/JECXZ disp)
*
* NOTE: All the instructions in this group (LOOPNZ, LOOPZ, LOOP, and JCXZ) actually
* rely on the ADDRESS override setting for determining whether CX or ECX will be used,
* even though it seems counter-intuitive; ditto for the REP prefix.
*
* @this {X86CPU}
*/