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More FPU ops (Happy Thanksgiving!)

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This commit is contained in:
Jeff Parsons 2015-11-26 12:18:50 -08:00
commit 92ca57a3a8
1 changed files with 61 additions and 21 deletions
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82
modules/pcjs/lib/x86fpu.js
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@ -186,11 +186,15 @@ X86FPU.MAX_INT64 = Math.pow(2, 63);
/**
* F2XM1()
*
* NOTE: On the 8087 and 80287, the value in ST(0) must satisfy the inequality 0 <= ST(0) <= 0.5. On the 80287XL and
* later coprocessors, the permissible range is greater, and ST(0) must satisfy the inequality -1 < ST(0) < 1. If ST(0)
* is out of range, the result is undefined, even though no exception is raised.
*
* @this {X86FPU}
*/
X86FPU.F2XM1 = function()
{
this.opUnimplemented();
this.setST(0, Math.pow(2, this.getST(0)) - 1);
};
/**
@ -200,7 +204,10 @@ X86FPU.F2XM1 = function()
*/
X86FPU.FABS = function()
{
this.opUnimplemented();
/*
* NOTE: This could be implemented more efficiently by simply clearing the sign bit of ST(0).
*/
this.setST(0, Math.abs(this.getST(0)));
};
/**
@ -282,7 +289,10 @@ X86FPU.FBSTPpd = function()
*/
X86FPU.FCHS = function()
{
this.opUnimplemented();
/*
* NOTE: This could be implemented more efficiently by simply inverting the sign bit of ST(0).
*/
this.setST(0, -this.getST(0));
};
/**
@ -423,7 +433,8 @@ X86FPU.FCOMPP = function()
*/
X86FPU.FDECSTP = function()
{
this.opUnimplemented();
this.iST = (this.iST - 1) & 0x7;
this.regStatus &= ~X86.FPU.STATUS.C1;
};
/**
@ -595,7 +606,7 @@ X86FPU.FFREEP8087 = function()
*/
X86FPU.FIADD16 = function()
{
this.opUnimplemented();
this.setST(0, this.getST(0) + this.getWIFromEA());
};
/**
@ -605,7 +616,7 @@ X86FPU.FIADD16 = function()
*/
X86FPU.FIADD32 = function()
{
this.opUnimplemented();
this.setST(0, this.getST(0) + this.getSIFromEA());
};
/**
@ -615,7 +626,7 @@ X86FPU.FIADD32 = function()
*/
X86FPU.FICOM16 = function()
{
this.opUnimplemented();
this.doCompare(this.getST(0), this.getWIFromEA());
};
/**
@ -625,7 +636,7 @@ X86FPU.FICOM16 = function()
*/
X86FPU.FICOM32 = function()
{
this.opUnimplemented();
this.doCompare(this.getST(0), this.getSIFromEA());
};
/**
@ -635,7 +646,7 @@ X86FPU.FICOM32 = function()
*/
X86FPU.FICOMP16 = function()
{
this.opUnimplemented();
if (this.doCompare(this.getST(0), this.getWIFromEA())) this.popValue();
};
/**
@ -645,7 +656,7 @@ X86FPU.FICOMP16 = function()
*/
X86FPU.FICOMP32 = function()
{
this.opUnimplemented();
if (this.doCompare(this.getST(0), this.getSIFromEA())) this.popValue();
};
/**
@ -655,7 +666,7 @@ X86FPU.FICOMP32 = function()
*/
X86FPU.FIDIV16 = function()
{
this.opUnimplemented();
this.setST(0, this.doDivide(this.getST(0), this.getWIFromEA()));
};
/**
@ -675,7 +686,7 @@ X86FPU.FIDIV32 = function()
*/
X86FPU.FIDIVR16 = function()
{
this.opUnimplemented();
this.setST(0, this.doDivide(this.getWIFromEA(), this.getST(0)));
};
/**
@ -685,7 +696,7 @@ X86FPU.FIDIVR16 = function()
*/
X86FPU.FIDIVR32 = function()
{
this.opUnimplemented();
this.setST(0, this.doDivide(this.getSIFromEA(), this.getST(0)));
};
/**
@ -695,7 +706,7 @@ X86FPU.FIDIVR32 = function()
*/
X86FPU.FILD16 = function()
{
this.opUnimplemented();
this.pushValue(this.getWIFromEA());
};
/**
@ -705,8 +716,7 @@ X86FPU.FILD16 = function()
*/
X86FPU.FILD32 = function()
{
this.assert(this.cpu.regEA !== X86.ADDR_INVALID);
this.pushValue(this.cpu.getLong(this.cpu.regEA));
this.pushValue(this.getSIFromEA());
};
/**
@ -716,7 +726,7 @@ X86FPU.FILD32 = function()
*/
X86FPU.FILD64 = function()
{
this.opUnimplemented();
this.pushValue(this.getLIFromEA());
};
/**
@ -746,7 +756,8 @@ X86FPU.FIMUL32 = function()
*/
X86FPU.FINCSTP = function()
{
this.opUnimplemented();
this.iST = (this.iST + 1) & 0x7;
this.regStatus &= ~X86.FPU.STATUS.C1;
};
/**
@ -2337,10 +2348,24 @@ X86FPU.prototype.setTR = function(i, a)
}
};
/**
* getWIFromEA()
*
* Returns the (16-bit) "word-integer" value located at regEA.
*
* @this {X86FPU}
* @return {number} v
*/
X86FPU.prototype.getWIFromEA = function()
{
this.assert(this.cpu.regEA !== X86.ADDR_INVALID);
return (this.cpu.getShort(this.cpu.regEA) << 16) >> 16;
};
/**
* getSIFromEA()
*
* Sets the internal intTmpLR register to the (32-bit) "short-integer" value located at regEA.
* Returns the (32-bit) "short-integer" value located at regEA.
*
* @this {X86FPU}
* @return {number} v
@ -2348,8 +2373,23 @@ X86FPU.prototype.setTR = function(i, a)
X86FPU.prototype.getSIFromEA = function()
{
this.assert(this.cpu.regEA !== X86.ADDR_INVALID);
this.intTmpLR[0] = this.cpu.getLong(this.cpu.regEA);
return this.intTmpLR[0];
return this.cpu.getLong(this.cpu.regEA);
};
/**
* getLIFromEA()
*
* Returns the (64-bit) "long-integer" value located at regEA.
*
* @this {X86FPU}
* @return {number} v
*/
X86FPU.prototype.getLIFromEA = function()
{
this.assert(this.cpu.regEA !== X86.ADDR_INVALID);
var lo = this.cpu.getLong(this.cpu.regEA);
var hi = this.cpu.getLong(this.cpu.regEA + 4);
return (hi * 0x100000000) + (lo >>> 0);
};
/**