corysanin/tubestation
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[JAEGER] Fast paths for integer addition, subtraction; (572081, r=dvander).

Browse Source
This commit is contained in:
Sean Stangl
2010-06-15 03:16:30 -07:00
parent dad3ec6f8d
commit 18c82d28b9
2 changed files with 170 additions and 70 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
js/src/methodjit/Compiler.cpp
View File

@@ -41,7 +41,6 @@
#include "jsnum.h"
#include "jsbool.h"
#include "jsiter.h"
#include "jslibmath.h"
#include "Compiler.h"
#include "StubCalls.h"
#include "MonoIC.h"
@@ -1569,75 +1568,6 @@ mjit::Compiler::jsop_this()
frame.pushSynced();
}
void
mjit::Compiler::jsop_binary(JSOp op, VoidStub stub)
{
FrameEntry *rhs = frame.peek(-1);
FrameEntry *lhs = frame.peek(-2);
if (lhs->isConstant() && rhs->isConstant()) {
const Value &L = lhs->getValue();
const Value &R = rhs->getValue();
if ((L.isPrimitive() && R.isPrimitive()) &&
(op != JSOP_ADD || (!L.isString() && !R.isString())))
{
/* Constant fold. */
double dL, dR;
ValueToNumber(cx, L, &dL);
ValueToNumber(cx, R, &dR);
switch (op) {
case JSOP_ADD:
dL += dR;
break;
case JSOP_SUB:
dL -= dR;
break;
case JSOP_MUL:
dL *= dR;
break;
case JSOP_DIV:
if (dR == 0) {
#ifdef XP_WIN
if (JSDOUBLE_IS_NaN(dR))
dL = js_NaN;
else
#endif
if (dL == 0 || JSDOUBLE_IS_NaN(dL))
dL = js_NaN;
else if (JSDOUBLE_IS_NEG(dL) != JSDOUBLE_IS_NEG(dR))
dL = cx->runtime->negativeInfinityValue.asDouble();
else
dL = cx->runtime->positiveInfinityValue.asDouble();
} else {
dL /= dR;
}
break;
case JSOP_MOD:
if (dL == 0)
dL = js_NaN;
else
dL = js_fmod(dR, dL);
break;
default:
JS_NOT_REACHED("NYI");
break;
}
frame.popn(2);
Value v;
v.setNumber(dL);
frame.push(v);
return;
}
}
/* Can't constant fold, slow paths. */
prepareStubCall();
stubCall(stub, Uses(2), Defs(1));
frame.popn(2);
frame.pushSynced();
}
void
mjit::Compiler::jsop_nameinc(JSOp op, VoidStubAtom stub, uint32 index)
{