void reboxAccordingToFormat(
ValueFormat format, AssemblyHelpers& jit, GPRReg value, GPRReg scratch1, GPRReg scratch2)
{
switch (format) {
case ValueFormatInt32: {
jit.zeroExtend32ToPtr(value, value);
jit.or64(GPRInfo::tagTypeNumberRegister, value);
break;
}
case ValueFormatUInt32: {
jit.zeroExtend32ToPtr(value, value);
jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
break;
}
case ValueFormatInt52: {
jit.rshift64(AssemblyHelpers::TrustedImm32(JSValue::int52ShiftAmount), value);
jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
break;
}
case ValueFormatStrictInt52: {
jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch2);
jit.boxInt52(value, value, scratch1, FPRInfo::fpRegT0);
jit.move64ToDouble(scratch2, FPRInfo::fpRegT0);
break;
}
case ValueFormatBoolean: {
jit.zeroExtend32ToPtr(value, value);
jit.or32(MacroAssembler::TrustedImm32(ValueFalse), value);
break;
}
case ValueFormatJSValue: {
// Done already!
break;
}
case ValueFormatDouble: {
jit.moveDoubleTo64(FPRInfo::fpRegT0, scratch1);
jit.move64ToDouble(value, FPRInfo::fpRegT0);
jit.boxDouble(FPRInfo::fpRegT0, value);
jit.move64ToDouble(scratch1, FPRInfo::fpRegT0);
break;
}
default:
RELEASE_ASSERT_NOT_REACHED();
break;
}
}
static void registerClobberCheck(AssemblyHelpers& jit, RegisterSet dontClobber)
{
if (!Options::clobberAllRegsInFTLICSlowPath())
return;
RegisterSet clobber = RegisterSet::allRegisters();
clobber.exclude(RegisterSet::reservedHardwareRegisters());
clobber.exclude(RegisterSet::stackRegisters());
clobber.exclude(RegisterSet::calleeSaveRegisters());
clobber.exclude(dontClobber);
GPRReg someGPR;
for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
if (!clobber.get(reg) || !reg.isGPR())
continue;
jit.move(AssemblyHelpers::TrustedImm32(0x1337beef), reg.gpr());
someGPR = reg.gpr();
}
for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) {
if (!clobber.get(reg) || !reg.isFPR())
continue;
jit.move64ToDouble(someGPR, reg.fpr());
}
}
void ValueRep::emitRestore(AssemblyHelpers& jit, Reg reg) const
{
if (reg.isGPR()) {
switch (kind()) {
case LateRegister:
case Register:
if (isGPR())
jit.move(gpr(), reg.gpr());
else
jit.moveDoubleTo64(fpr(), reg.gpr());
break;
case Stack:
jit.load64(AssemblyHelpers::Address(GPRInfo::callFrameRegister, offsetFromFP()), reg.gpr());
break;
case Constant:
jit.move(AssemblyHelpers::TrustedImm64(value()), reg.gpr());
break;
default:
RELEASE_ASSERT_NOT_REACHED();
break;
}
return;
}
switch (kind()) {
case LateRegister:
case Register:
if (isGPR())
jit.move64ToDouble(gpr(), reg.fpr());
else
jit.moveDouble(fpr(), reg.fpr());
break;
case Stack:
jit.loadDouble(AssemblyHelpers::Address(GPRInfo::callFrameRegister, offsetFromFP()), reg.fpr());
break;
case Constant:
jit.move(AssemblyHelpers::TrustedImm64(value()), jit.scratchRegister());
jit.move64ToDouble(jit.scratchRegister(), reg.fpr());
break;
default:
RELEASE_ASSERT_NOT_REACHED();
break;
}
}