if want, got = a-c64s, sub64s(a); got != want {
		panic(fmt.Sprintf("sub64s(%x) = %x, want %x", a, got, want))
	}
	if want, got = a|c64a, or64(a); got != want {
		panic(fmt.Sprintf("or64(%x) = %x, want %x", a, got, want))
	}
	if want, got = a^c64a, xor64(a); got != want {
		panic(fmt.Sprintf("xor64(%x) = %x, want %x", a, got, want))
	}
	if want, got = c64a-a, subr64a(a); got != want {

((Add64|Or64|Xor64) left:(Lsh64x64 x y) right:(Rsh64Ux64 x (Sub64 (Const64 [64]) y))) && (shiftIsBounded(left) || shiftIsBounded(right)) && canRotate(config, 64) => (RotateLeft64 x y)
((Add64|Or64|Xor64) left:(Lsh64x32 x y) right:(Rsh64Ux32 x (Sub32 (Const32 [64]) y))) && (shiftIsBounded(left) || shiftIsBounded(right)) && canRotate(config, 64) => (RotateLeft64 x y)

(And64 x y) =>
	(Int64Make
		(And32 <typ.UInt32> (Int64Hi x) (Int64Hi y))
		(And32 <typ.UInt32> (Int64Lo x) (Int64Lo y)))

(Or64 x y) =>
	(Int64Make
		(Or32 <typ.UInt32> (Int64Hi x) (Int64Hi y))
		(Or32 <typ.UInt32> (Int64Lo x) (Int64Lo y)))

(Xor64 x y) =>
	(Int64Make
		(Xor32 <typ.UInt32> (Int64Hi x) (Int64Hi y))
		(Xor32 <typ.UInt32> (Int64Lo x) (Int64Lo y)))

					continue
				}
				y := v_1_1
				v.copyOf(y)
				return true
			}
		}
		break
	}
	// match: (Xor64 (Xor64 i:(Const64 <t>) z) x)
	// cond: (z.Op != OpConst64 && x.Op != OpConst64)
	// result: (Xor64 i (Xor64 <t> z x))
	for {
		for _i0 := 0; _i0 <= 1; _i0, v_0, v_1 = _i0+1, v_1, v_0 {
			if v_0.Op != OpXor64 {
				continue
			}
			_ = v_0.Args[1]

	{name: "Or16", argLength: 2, commutative: true},
	{name: "Or32", argLength: 2, commutative: true},
	{name: "Or64", argLength: 2, commutative: true},

	{name: "Xor8", argLength: 2, commutative: true}, // arg0 ^ arg1
	{name: "Xor16", argLength: 2, commutative: true},
	{name: "Xor32", argLength: 2, commutative: true},
	{name: "Xor64", argLength: 2, commutative: true},

		v.AddArg(v0)
		return true
	}
}
func rewriteValuedec64_OpXor64(v *Value) bool {
	v_1 := v.Args[1]
	v_0 := v.Args[0]
	b := v.Block
	typ := &b.Func.Config.Types
	// match: (Xor64 x y)
	// result: (Int64Make (Xor32 <typ.UInt32> (Int64Hi x) (Int64Hi y)) (Xor32 <typ.UInt32> (Int64Lo x) (Int64Lo y)))
	for {
		x := v_0
		y := v_1
		v.reset(OpInt64Make)

// (x + y) / 2 with x>=y -> (x - y) / 2 + y
(Avg64u <t> x y) => (ADD (SRDconst <t> (SUB <t> x y) [1]) y)

(And64 ...) => (AND ...)
(And(32|16|8) ...) => (ANDW ...)

(Or64 ...) => (OR ...)
(Or(32|16|8) ...) => (ORW ...)

(Xor64 ...) => (XOR ...)
(Xor(32|16|8) ...) => (XORW ...)

(Neg64 ...) => (NEG ...)
(Neg(32|16|8) ...) => (NEGW ...)
(Neg32F ...) => (FNEGS ...)
(Neg64F ...) => (FNEG ...)

// license that can be found in the LICENSE file.

//go:build arm || wasm

// Export some functions via linkname to assembly in sync/atomic.
//
//go:linkname And32
//go:linkname Or32
//go:linkname And64
//go:linkname Or64
//go:linkname Anduintptr
//go:linkname Oruintptr

package atomic

import _ "unsafe" // For linkname

//go:nosplit
func And32(ptr *uint32, val uint32) uint32 {
	for {
		old := *ptr

	var x [128]uint64 // give x its own cache line
	sink = &x
	for i := 0; i < b.N; i++ {
		atomic.Or64(&x[63], uint64(i))
	}
}

func BenchmarkOr64Parallel(b *testing.B) {
	var x [128]uint64 // give x its own cache line
	sink = &x
	b.RunParallel(func(pb *testing.PB) {
		i := uint64(0)
		for pb.Next() {
			atomic.Or64(&x[63], i)
			i++
		}
	})

	MOVL	val+8(FP), CX
casloop:
	MOVL 	CX, DX
	MOVL	(BX), AX
	ANDL	AX, DX
	LOCK
	CMPXCHGL	DX, (BX)
	JNZ casloop
	MOVL 	AX, ret+16(FP)
	RET

// func Or64(addr *uint64, v uint64) old uint64
TEXT ·Or64(SB), NOSPLIT, $0-24
	MOVQ	ptr+0(FP), BX
	MOVQ	val+8(FP), CX
casloop:
	MOVQ 	CX, DX
	MOVQ	(BX), AX
	ORQ	AX, DX
	LOCK
	CMPXCHGQ	DX, (BX)
	JNZ casloop
	MOVQ 	AX, ret+16(FP)