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Issue #2313 - Implement WebAssembly sign extension opcodes. https://bugzilla.mozilla.org/show_bug.cgi?id=1389461

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Brian Smith 2023-09-22 13:23:36 -05:00 • committed by roytam1
commit 61b73a894a
37 changed files with 444 additions and 33 deletions
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39
js/src/jit/MIR.cpp
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@ -2618,9 +2618,9 @@ MRsh::foldsTo(TempAllocator& alloc)
switch (shift) {
case 16:
return MSignExtend::New(alloc, lhs->getOperand(0), MSignExtend::Half);
return MSignExtendInt32::New(alloc, lhs->getOperand(0), MSignExtendInt32::Half);
case 24:
return MSignExtend::New(alloc, lhs->getOperand(0), MSignExtend::Byte);
return MSignExtendInt32::New(alloc, lhs->getOperand(0), MSignExtendInt32::Byte);
}
return this;
@ -3802,6 +3802,41 @@ MExtendInt32ToInt64::foldsTo(TempAllocator& alloc)
return this;
}
MDefinition*
MSignExtendInt32::foldsTo(TempAllocator& alloc)
{
MDefinition* input = this->input();
if (input->isConstant()) {
int32_t c = input->toConstant()->toInt32();
int32_t res;
switch (mode_) {
case Byte: res = int32_t(int8_t(c & 0xFF)); break;
case Half: res = int32_t(int16_t(c & 0xFFFF)); break;
}
return MConstant::New(alloc, Int32Value(res));
}
return this;
}
MDefinition*
MSignExtendInt64::foldsTo(TempAllocator& alloc)
{
MDefinition* input = this->input();
if (input->isConstant()) {
int64_t c = input->toConstant()->toInt64();
int64_t res;
switch (mode_) {
case Byte: res = int64_t(int8_t(c & 0xFF)); break;
case Half: res = int64_t(int16_t(c & 0xFFFF)); break;
case Word: res = int64_t(int32_t(c & 0xFFFFFFFFU)); break;
}
return MConstant::NewInt64(alloc, res);
}
return this;
}
MDefinition*
MToDouble::foldsTo(TempAllocator& alloc)
{