v.Fatalf("SumBytes generated %s", v.LongString())
	case ssa.OpS390XLOCGR:
		p := s.Prog(v.Op.Asm())
		p.From.Type = obj.TYPE_CONST
		p.From.Offset = int64(v.Aux.(s390x.CCMask))
		p.Reg = v.Args[1].Reg()
		p.To.Type = obj.TYPE_REG
		p.To.Reg = v.Reg()
	case ssa.OpS390XFSQRTS, ssa.OpS390XFSQRT:
		p := s.Prog(v.Op.Asm())
		p.From.Type = obj.TYPE_REG
		p.From.Reg = v.Args[0].Reg()

				if opcodeTable[Op(v.AuxInt)].name == "OpInvalid" {
					f.Fatalf("value %v has an AuxInt value that is a valid opcode", v)
				}
				canHaveAuxInt = true
			case auxS390XCCMask:
				if _, ok := v.Aux.(s390x.CCMask); !ok {
					f.Fatalf("bad type %T for S390XCCMask in %v", v.Aux, v)
				}
				canHaveAux = true
			case auxS390XRotateParams:
				if _, ok := v.Aux.(s390x.RotateParams); !ok {

	case "CallOff":
		return "Call"
	case "SymValAndOff":
		return "Sym"
	case "Typ":
		return "*types.Type"
	case "TypSize":
		return "*types.Type"
	case "S390XCCMask":
		return "s390x.CCMask"
	case "S390XRotateParams":
		return "s390x.RotateParams"
	default:
		return "invalid"
	}
}

// auxIntType returns the Go type that this operation should store in its auxInt field.