Function MCOperandInfo_getOperandConstraint

MCInstrDesc.c:30–41

Returns the value of the specified operand constraint if it is present. Returns -1 if it is not present.

/// Returns the value of the specified operand constraint if
/// it is present. Returns -1 if it is not present.
int MCOperandInfo_getOperandConstraint(const MCInstrDesc *InstrDesc,
				       unsigned OpNum,
				       MCOI_OperandConstraint Constraint)
{
	const MCOperandInfo OpInfo = InstrDesc->OpInfo[OpNum];
	if (OpNum < InstrDesc->NumOperands &&
	    (OpInfo.Constraints & (1 << Constraint))) {
		unsigned ValuePos = 4 + Constraint * 4;
		return (OpInfo.Constraints >> ValuePos) & 0xf;
	}
	return -1;
}