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Bug 1028573 - Implement RInstruction for MathFunction::round. r=nbp

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This commit is contained in:
David Moreira 2014-06-22 11:14:00 -07:00
parent 12e818afee
commit 494e623000
3 changed files with 29 additions and 2 deletions
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13
js/src/jit-test/tests/ion/dce-with-rinstructions.js
View File

@ -163,14 +163,22 @@ function radd_float(i) {
return i;
}
var uceFault_round = eval(uneval(uceFault).replace('uceFault', 'uceFault_round'));
var uceFault_round_number = eval(uneval(uceFault).replace('uceFault', 'uceFault_round'));
function rround_number(i) {
var x = Math.round(i + 1.4);
if (uceFault_round(i) || uceFault_round(i))
if (uceFault_round_number(i) || uceFault_round_number(i))
assertEq(x, 100); /* = i + 1*/
return i;
}
var uceFault_round_double = eval(uneval(uceFault).replace('uceFault', 'uceFault_round_double'));
function rround_double(i) {
var x = Math.round(i + (-1 >>> 0));
if (uceFault_round_double(i) || uceFault_round_double(i))
assertEq(x, 99 + (-1 >>> 0)); /* = i + 2 ^ 32 - 1 */
return i;
}
var uceFault_add_object = eval(uneval(uceFault).replace('uceFault', 'uceFault_add_object'));
function radd_object(i) {
var t = i;
@ -355,6 +363,7 @@ for (i = 0; i < 100; i++) {
rconcat_string(i);
rconcat_number(i);
rround_number(i);
rround_double(i);
rpow_number(i);
rpow_object(i);
}

4
js/src/jit/MIR.h
View File

@ -4321,6 +4321,10 @@ class MMathFunction
}
void trySpecializeFloat32(TempAllocator &alloc);
void computeRange(TempAllocator &alloc);
bool writeRecoverData(CompactBufferWriter &writer) const;
bool canRecoverOnBailout() const {
return function_ == Round;
}
};
class MAdd : public MBinaryArithInstruction

14
js/src/jit/Recover.cpp
View File

@ -560,6 +560,20 @@ RPow::recover(JSContext *cx, SnapshotIterator &iter) const
return true;
}
bool
MMathFunction::writeRecoverData(CompactBufferWriter &writer) const
{
MOZ_ASSERT(canRecoverOnBailout());
switch (function_) {
case Round:
writer.writeUnsigned(uint32_t(RInstruction::Recover_Round));
return true;
default:
MOZ_ASSUME_UNREACHABLE("Unknown math function.");
return false;
}
}
bool
MNewObject::writeRecoverData(CompactBufferWriter &writer) const
{