constexpr Operand()
: reg_(PhysReg{128}), isTemp_(false), isFixed_(true), isConstant_(false),
isKill_(false), isUndef_(true), isFirstKill_(false), constSize(0),
- isLateKill_(false), is16bit_(false), is24bit_(false) {}
+ isLateKill_(false), is16bit_(false), is24bit_(false), signext(false) {}
explicit Operand(Temp r) noexcept
{
data_.i = 0xc0800000;
setFixed(PhysReg{247});
} else { /* Literal Constant: we don't know if it is a long or double.*/
- isConstant_ = 0;
- assert(false && "attempt to create a 64-bit literal constant");
+ signext = v >> 63;
+ data_.i = v & 0xffffffffu;
+ setFixed(PhysReg{255});
+ assert(constantValue64() == v && "attempt to create a unrepresentable 64-bit literal constant");
}
};
explicit Operand(RegClass type) noexcept
return 0x4010000000000000;
case 247:
return 0xC010000000000000;
+ case 255:
+ return (signext && (data_.i & 0x80000000u) ? 0xffffffff00000000ull : 0ull) | data_.i;
}
unreachable("invalid register for 64-bit constant");
} else {
uint8_t isLateKill_:1;
uint8_t is16bit_:1;
uint8_t is24bit_:1;
+ uint8_t signext:1;
};
/* can't initialize bit-fields in c++11, so work around using a union */
uint16_t control_ = 0;