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Implemented INC/DEC opcodes

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This commit is contained in:
Jeff 2016-09-27 09:28:52 -07:00 • committed by Jeff Parsons
commit e322c5f912
3 changed files with 133 additions and 50 deletions
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68
modules/pdp11/lib/cpuops.js
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@ -38,22 +38,22 @@ if (NODE) {
}
/**
* fnADD(dst, src)
* fnADD(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
* @param {number} dst
* @return {number} (src + dst)
* @return {number} (dst + src)
*/
PDP11.fnADD = function(src, dst)
{
var result = src + dst;
var result = dst + src;
this.updateAddFlags(result, src, dst);
return result & 0xffff;
};
/**
* fnBIC(dst, src)
* fnBIC(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
@ -62,13 +62,13 @@ PDP11.fnADD = function(src, dst)
*/
PDP11.fnBIC = function(src, dst)
{
var result = ~src & dst;
var result = dst & ~src;
this.updateNZFlags(result);
return result;
};
/**
* fnBICB(dst, src)
* fnBICB(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
@ -77,43 +77,73 @@ PDP11.fnBIC = function(src, dst)
*/
PDP11.fnBICB = function(src, dst)
{
var result = ~src & dst;
var result = dst & ~src;
this.updateNZFlags(result << 8);
return result;
};
/**
* fnBIS(dst, src)
* fnBIS(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
* @param {number} dst
* @return {number} (src | dst)
* @return {number} (dst | src)
*/
PDP11.fnBIS = function(src, dst)
{
var result = src | dst;
var result = dst | src;
this.updateNZFlags(result);
return result;
};
/**
* fnBISB(dst, src)
* fnBISB(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
* @param {number} dst
* @return {number} (src | dst)
* @return {number} (dst | src)
*/
PDP11.fnBISB = function(src, dst)
{
var result = src | dst;
var result = dst | src;
this.updateNZFlags(result << 8);
return result;
};
/**
* fnSUB(dst, src)
* fnDEC(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src (ie, 1)
* @param {number} dst
* @return {number} (dst - src)
*/
PDP11.fnDEC = function(src, dst)
{
var result = dst - src;
this.updateDecFlags(result, src, dst);
return result & 0xffff;
};
/**
* fnINC(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src (ie, 1)
* @param {number} dst
* @return {number} (dst + src)
*/
PDP11.fnINC = function(src, dst)
{
var result = dst + src;
this.updateIncFlags(result, src, dst);
return result & 0xffff;
};
/**
* fnSUB(src, dst)
*
* @this {CPUStatePDP11}
* @param {number} src
@ -689,10 +719,7 @@ PDP11.opCOMB = function(opCode)
*/
PDP11.opDEC = function(opCode)
{
/*
* TODO: Implement
*/
this.regOp = -1;
this.updateWordByMode(opCode, 1, PDP11.fnDEC);
this.nStepCycles -= 1;
};
@ -764,10 +791,7 @@ PDP11.opHALT = function(opCode)
*/
PDP11.opINC = function(opCode)
{
/*
* TODO: Implement
*/
this.regOp = -1;
this.updateWordByMode(opCode, 1, PDP11.fnINC);
this.nStepCycles -= 1;
};