// require special handling.
func IsLoong64RDTIME(op obj.As) bool {
	switch op {
	case loong64.ARDTIMELW, loong64.ARDTIMEHW, loong64.ARDTIMED:
		return true
	}
	return false
}

func IsLoong64PRELD(op obj.As) bool {
	switch op {
	case loong64.APRELD, loong64.APRELDX:
		return true
	}
	return false
}

func IsLoong64AMO(op obj.As) bool {
	return loong64.IsAtomicInst(op)
}

					p.errorf("invalid addressing modes for 2nd operand to %s instruction, must be register", op)
					return
				}
				prog.RegTo2 = a[1].Reg
				break
			}

			if arch.IsLoong64PRELD(op) {
				prog.From = a[0]
				prog.AddRestSource(a[1])
				break
			}
		}
		prog.From = a[0]
		prog.To = a[1]
	case 3:
		switch p.arch.Family {
		case sys.MIPS, sys.MIPS64: