// It is encoded as an MRC with a bit inside the instruction word,
// passed to arch.ARMMRCOffset.
const aMCR = arm.ALAST + 1

// IsARMMRC reports whether the op (as defined by an arm.A* constant) is
// MRC or MCR.
func IsARMMRC(op obj.As) bool {
	switch op {
	case arm.AMRC, aMCR: // Note: aMCR is defined in this package.
		return true
	}
	return false
}

			prog.AddRestSourceArgs([]obj.Addr{a[1], a[2], a[3]})
			prog.To = a[4]
			break
		}
		p.errorf("can't handle %s instruction with 5 operands", op)
		return
	case 6:
		if p.arch.Family == sys.ARM && arch.IsARMMRC(op) {
			// Strange special case: MCR, MRC.
			prog.To.Type = obj.TYPE_CONST
			x0 := p.getConstant(prog, op, &a[0])
			x1 := p.getConstant(prog, op, &a[1])
			x2 := int64(p.getRegister(prog, op, &a[2]))