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Clean up CF handling (no more direct manipulation of result variables)

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This commit is contained in:
Jeff Parsons 2016-05-12 11:11:19 -07:00
commit 9a0e5cddc6
4 changed files with 25 additions and 44 deletions
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29
modules/pc8080/lib/cpusim.js
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@ -434,7 +434,7 @@ CPUSim.prototype.clearCF = function()
* getCF()
*
* @this {CPUSim}
* @return {number} 0 or CPUDef.PS.CF
* @return {number} 0 or 1 (CPUDef.PS.CF)
*/
CPUSim.prototype.getCF = function()
{
@ -452,18 +452,14 @@ CPUSim.prototype.setCF = function()
};
/**
* updateCF(fCarry)
* updateCF(CF)
*
* @this {CPUSim}
* @param {boolean} fCarry
* @param {number} CF (0x000 or 0x100)
*/
CPUSim.prototype.updateCF = function(fCarry)
CPUSim.prototype.updateCF = function(CF)
{
if (fCarry) {
this.resultZeroCarry |= 0x100;
} else {
this.resultZeroCarry &= ~0x100;
}
this.resultZeroCarry = (this.resultZeroCarry & 0xff) | CF;
};
/**
@ -528,21 +524,6 @@ CPUSim.prototype.setAF = function()
this.resultAuxOverflow = (~this.resultParitySign & 0x10) | (this.resultAuxOverflow & ~0x10);
};
/**
* updateAF(fAuxCarry)
*
* @this {CPUSim}
* @param {boolean} fAuxCarry
*/
CPUSim.prototype.updateAF = function(fAuxCarry)
{
if (fAuxCarry) {
this.setAF();
} else {
this.clearAF();
}
};
/**
* clearZF()
*