// CHECK-DAG: %[[PROX:.*]] = "tf.Sub"(%[[VAR]], %[[DELTA]]) : (tensor<4xf32>, tensor<4xf32>) -> tensor<4xf32>
    // CHECK-DAG: %[[SIGN:.*]] = "tf.Sign"(%[[PROX]]) : (tensor<4xf32>) -> tensor<4xf32>
    // CHECK-DAG: %[[ABS:.*]] = "tf.Abs"(%[[PROX]]) : (tensor<4xf32>) -> tensor<4xf32>

type target struct {
	sig  *Signature
	desc string
}

// newTarget creates a new target for the given type and description.
// The result is nil if typ is not a signature.
func newTarget(typ Type, desc string) *target {
	if typ != nil {
		if sig, _ := under(typ).(*Signature); sig != nil {
			return &target{sig, desc}
		}
	}
	return nil
}

	return fcb.encode()
}

// logicFlags64 returns flags set to the sign/zeroness of x.
// C and V are set to false.
func logicFlags64(x int64) flagConstant {
	var fcb flagConstantBuilder
	fcb.Z = x == 0
	fcb.N = x < 0
	return fcb.encode()
}

// logicFlags32 returns flags set to the sign/zeroness of x.
// C and V are set to false.
func logicFlags32(x int32) flagConstant {

type target struct {
	sig  *Signature
	desc string
}

// newTarget creates a new target for the given type and description.
// The result is nil if typ is not a signature.
func newTarget(typ Type, desc string) *target {
	if typ != nil {
		if sig, _ := under(typ).(*Signature); sig != nil {
			return &target{sig, desc}
		}
	}
	return nil
}

		// in Identical() or String().
		sig, _ := sel.Type().(*Signature)
		if sel.Kind() == MethodVal {
			got := sig.Recv().Type()
			want := sel.Recv()
			if !Identical(got, want) {
				t.Errorf("%s: Recv() = %s, want %s", segment, got, want)
			}
		} else if sig != nil && sig.Recv() != nil {
			t.Errorf("%s: signature has receiver %s", sig, sig.Recv().Type())
		}
	}

		// in Identical() or String().
		sig, _ := sel.Type().(*Signature)
		if sel.Kind() == MethodVal {
			got := sig.Recv().Type()
			want := sel.Recv()
			if !Identical(got, want) {
				t.Errorf("%s: Recv() = %s, want %s", syntax, got, want)
			}
		} else if sig != nil && sig.Recv() != nil {
			t.Errorf("%s: signature has receiver %s", sig, sig.Recv().Type())
		}
	}

// certificate signing key.
type ConstraintViolationError struct{}

func (ConstraintViolationError) Error() string {
	return "x509: invalid signature: parent certificate cannot sign this kind of certificate"
}

func (c *Certificate) Equal(other *Certificate) bool {
	if c == nil || other == nil {
		return c == other
	}
	return bytes.Equal(c.Raw, other.Raw)
}

	return nil, 0
}

// isCleanExt reports whether v is the result of a value-preserving
// sign or zero extension.
func isCleanExt(v *Value) bool {
	switch v.Op {
	case OpSignExt8to16, OpSignExt8to32, OpSignExt8to64,
		OpSignExt16to32, OpSignExt16to64, OpSignExt32to64:
		// signed -> signed is the only value-preserving sign extension
		return v.Args[0].Type.IsSigned() && v.Type.IsSigned()

	MOVD $112, R22
	MOVD $128, R23
	MOVD $144, R24
	MOVD $160, R25
	MOVD $104, R26 // offset of sign+24(FP)

	LXVD2X (R16)(CPOOL), PH
	LXVD2X (R0)(CPOOL), PL

	LXVD2X (R17)(P2ptr), Y2L
	LXVD2X (R18)(P2ptr), Y2H
	XXPERMDI Y2H, Y2H, $2, Y2H
	XXPERMDI Y2L, Y2L, $2, Y2L

	// Equivalent of VLREPG sign+24(FP), SEL1
	LXVDSX   (R1)(R26), SEL1
	VSPLTISB $0, ZER
	VCMPEQUD SEL1, ZER, SEL1

	}
	return *getSidSubAuthority(sid, idx)
}

// IsValid returns whether the SID has a valid revision and length.
func (sid *SID) IsValid() bool {
	return isValidSid(sid)
}

// Equals compares two SIDs for equality.
func (sid *SID) Equals(sid2 *SID) bool {
	return EqualSid(sid, sid2)
}

// IsWellKnown determines whether the SID matches the well-known sidType.