func (x *Bool) Swap(new bool) (old bool) { return SwapUint32(&x.v, b32(new)) != 0 }

// CompareAndSwap executes the compare-and-swap operation for the boolean value x.
func (x *Bool) CompareAndSwap(old, new bool) (swapped bool) {
	return CompareAndSwapUint32(&x.v, b32(old), b32(new))
}

// b32 returns a uint32 0 or 1 representing b.
func b32(b bool) uint32 {
	if b {
		return 1
	}
	return 0
}

// this struct corresponds to one used when Signo is SIGCHLD.
//
// NOTE fields are exported to be used by TestSiginfoChildLayout.
type SiginfoChild struct {
	Signo       int32
	siErrnoCode                // Two int32 fields, swapped on MIPS.
	_           [is64bit]int32 // Extra padding for 64-bit hosts only.

	// End of common part. Beginning of signal-specific part.

	Pid    int32
	Uid    uint32
	Status int32

	// Pad to 128 bytes.

	Store(key, value any)
	LoadOrStore(key, value any) (actual any, loaded bool)
	LoadAndDelete(key any) (value any, loaded bool)
	Delete(any)
	Swap(key, value any) (previous any, loaded bool)
	CompareAndSwap(key, old, new any) (swapped bool)
	CompareAndDelete(key, old any) (deleted bool)
	Range(func(key, value any) (shouldContinue bool))
	Clear()
}

var (
	_ mapInterface = &RWMutexMap{}
	_ mapInterface = &DeepCopyMap{}
)

	CMP	R3, R7
	BNE	cas64fail

	DMB	MB_ISHST

	STREXD	R4, (R1), R0	// stores R4 and R5
	CMP	$0, R0
	BNE	cas64loop
	MOVW	$1, R0

	DMB	MB_ISH

	MOVBU	R0, swapped+20(FP)
	RET
cas64fail:
	MOVW	$0, R0
	MOVBU	R0, swapped+20(FP)
	RET

TEXT armXadd64<>(SB),NOSPLIT,$0-20
	// addr is already in R1
	MOVW	delta_lo+4(FP), R2
	MOVW	delta_hi+8(FP), R3

add64loop:

	if v := unsafe.Sizeof(si); v != 128 {
		t.Fatalf("sizeof: got %d, want 128", v)
	}

	ofSigno := 0
	ofErrno := 4
	ofCode := 8
	if strings.HasPrefix(runtime.GOARCH, "mips") {
		// These two fields are swapped on MIPS platforms.
		ofErrno, ofCode = ofCode, ofErrno
	}
	ofPid := 12
	if host64bit {
		ofPid = 16
	}
	ofUid := ofPid + 4
	ofStatus := ofPid + 8

	offsets := []struct {
		name string

//go:nosplit
func Xchg64(addr *uint64, new uint64) (old uint64) {
	lockAndCheck(addr)

	old = *addr
	*addr = new

	unlock()
	return
}

//go:nosplit
func Cas64(addr *uint64, old, new uint64) (swapped bool) {
	lockAndCheck(addr)

	if (*addr) == old {
		*addr = new
		unlock()
		return true
	}

	unlock()
	return false
}

//go:nosplit
func Load64(addr *uint64) (val uint64) {

	return s.Min.X <= r.Min.X && r.Max.X <= s.Max.X &&
		s.Min.Y <= r.Min.Y && r.Max.Y <= s.Max.Y
}

// Canon returns the canonical version of r. The returned rectangle has minimum
// and maximum coordinates swapped if necessary so that it is well-formed.
func (r Rectangle) Canon() Rectangle {
	if r.Max.X < r.Min.X {
		r.Min.X, r.Max.X = r.Max.X, r.Min.X
	}
	if r.Max.Y < r.Min.Y {
		r.Min.Y, r.Max.Y = r.Max.Y, r.Min.Y
	}

//
// All calls to CompareAndSwap for a given Value must use values of the same
// concrete type. CompareAndSwap of an inconsistent type panics, as does
// CompareAndSwap(old, nil).
func (v *Value) CompareAndSwap(old, new any) (swapped bool) {
	if new == nil {
		panic("sync/atomic: compare and swap of nil value into Value")
	}
	vp := (*efaceWords)(unsafe.Pointer(v))
	np := (*efaceWords)(unsafe.Pointer(&new))

	// dynamicTransformers updates the transformers when encryption config file changes.
	dynamicTransformers *encryptionconfig.DynamicTransformers

	// identity of the api server
	apiServerID string

	// can be swapped during testing
	getEncryptionConfigHash func(ctx context.Context, filepath string) (string, error)

	}

	x.before = _magic
	x.after = _magic
	for j := 0; j < 32; j += 1 {
		x.i = (1 << j) + 0
		x.o = (1 << j) + 0
		x.n = (1 << j) + 1
		if !atomic.CasRel(&x.i, x.o, x.n) {
			t.Fatalf("should have swapped %#x %#x", x.o, x.n)
		}

		if x.i != x.n {
			t.Fatalf("wrong x.i after swap: x.i=%#x x.n=%#x", x.i, x.n)
		}

		if x.before != _magic || x.after != _magic {