void
FrameInfo::popValue(ValueOperand dest)
{
StackValue *val = peek(-1);
switch (val->kind()) {
case StackValue::Constant:
masm.moveValue(val->constant(), dest);
break;
case StackValue::LocalSlot:
masm.loadValue(addressOfLocal(val->localSlot()), dest);
break;
case StackValue::ArgSlot:
masm.loadValue(addressOfArg(val->argSlot()), dest);
break;
case StackValue::ThisSlot:
masm.loadValue(addressOfThis(), dest);
break;
case StackValue::Stack:
masm.popValue(dest);
break;
case StackValue::Register:
masm.moveValue(val->reg(), dest);
break;
default:
MOZ_ASSUME_UNREACHABLE("Invalid kind");
}
// masm.popValue already adjusted the stack pointer, don't do it twice.
pop(DontAdjustStack);
}
void
FrameInfo::popRegsAndSync(uint32_t uses)
{
// x86 has only 3 Value registers. Only support 2 regs here for now,
// so that there's always a scratch Value register for reg -> reg
// moves.
JS_ASSERT(uses > 0);
JS_ASSERT(uses <= 2);
JS_ASSERT(uses <= stackDepth());
syncStack(uses);
switch (uses) {
case 1:
popValue(R0);
break;
case 2: {
// If the second value is in R1, move it to R2 so that it's not
// clobbered by the first popValue.
StackValue *val = peek(-2);
if (val->kind() == StackValue::Register && val->reg() == R1) {
masm.moveValue(R1, R2);
val->setRegister(R2);
}
popValue(R1);
popValue(R0);
break;
}
default:
MOZ_ASSUME_UNREACHABLE("Invalid uses");
}
}
