libgo/go/runtime/alg.go - rust-lang/gcc - Git at Google

 // Copyright 2014 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.

 package runtime

 import (
 	"internal/cpu"
 	"runtime/internal/sys"
 	"unsafe"
 )

 // For gccgo, use go:linkname to rename compiler-called functions to
 // themselves, so that the compiler will export them.
 //
 //go:linkname memhash0 runtime.memhash0
 //go:linkname memhash8 runtime.memhash8
 //go:linkname memhash16 runtime.memhash16
 //go:linkname memhash32 runtime.memhash32
 //go:linkname memhash64 runtime.memhash64
 //go:linkname memhash128 runtime.memhash128
 //go:linkname strhash runtime.strhash
 //go:linkname f32hash runtime.f32hash
 //go:linkname f64hash runtime.f64hash
 //go:linkname c64hash runtime.c64hash
 //go:linkname c128hash runtime.c128hash
 //go:linkname interhash runtime.interhash
 //go:linkname nilinterhash runtime.nilinterhash
 //go:linkname memequal0 runtime.memequal0
 //go:linkname memequal8 runtime.memequal8
 //go:linkname memequal16 runtime.memequal16
 //go:linkname memequal32 runtime.memequal32
 //go:linkname memequal64 runtime.memequal64
 //go:linkname memequal128 runtime.memequal128
 //go:linkname strequal runtime.strequal
 //go:linkname f32equal runtime.f32equal
 //go:linkname f64equal runtime.f64equal
 //go:linkname c64equal runtime.c64equal
 //go:linkname c128equal runtime.c128equal
 //go:linkname interequal runtime.interequal
 //go:linkname nilinterequal runtime.nilinterequal
 //go:linkname efaceeq runtime.efaceeq
 //go:linkname ifaceeq runtime.ifaceeq
 //go:linkname ifacevaleq runtime.ifacevaleq
 //go:linkname ifaceefaceeq runtime.ifaceefaceeq
 //go:linkname efacevaleq runtime.efacevaleq
 //go:linkname eqstring runtime.eqstring
 //go:linkname cmpstring runtime.cmpstring
 //
 // Temporary to be called from C code.
 //go:linkname alginit runtime.alginit

 const (
 	c0 = uintptr((8-sys.PtrSize)/4*2860486313 + (sys.PtrSize-4)/4*33054211828000289)
 	c1 = uintptr((8-sys.PtrSize)/4*3267000013 + (sys.PtrSize-4)/4*23344194077549503)
 )

 func memhash0(p unsafe.Pointer, h uintptr) uintptr {
 	return h
 }

 func memhash8(p unsafe.Pointer, h uintptr) uintptr {
 	return memhash(p, h, 1)
 }

 func memhash16(p unsafe.Pointer, h uintptr) uintptr {
 	return memhash(p, h, 2)
 }

 func memhash128(p unsafe.Pointer, h uintptr) uintptr {
 	return memhash(p, h, 16)
 }

 var useAeshash bool

 // in C code
 func aeshashbody(p unsafe.Pointer, h, s uintptr, sched []byte) uintptr

 func aeshash(p unsafe.Pointer, h, s uintptr) uintptr {
 	return aeshashbody(p, h, s, aeskeysched[:])
 }

 func aeshashstr(p unsafe.Pointer, h uintptr) uintptr {
 	ps := (*stringStruct)(p)
 	return aeshashbody(unsafe.Pointer(ps.str), h, uintptr(ps.len), aeskeysched[:])
 }

 func strhash(a unsafe.Pointer, h uintptr) uintptr {
 	x := (*stringStruct)(a)
 	return memhash(x.str, h, uintptr(x.len))
 }

 // NOTE: Because NaN != NaN, a map can contain any
 // number of (mostly useless) entries keyed with NaNs.
 // To avoid long hash chains, we assign a random number
 // as the hash value for a NaN.

 func f32hash(p unsafe.Pointer, h uintptr) uintptr {
 	f := *(*float32)(p)
 	switch {
 	case f == 0:
 		return c1 * (c0 ^ h) // +0, -0
 	case f != f:
 		return c1 * (c0 ^ h ^ uintptr(fastrand())) // any kind of NaN
 	default:
 		return memhash(p, h, 4)
 	}
 }

 func f64hash(p unsafe.Pointer, h uintptr) uintptr {
 	f := *(*float64)(p)
 	switch {
 	case f == 0:
 		return c1 * (c0 ^ h) // +0, -0
 	case f != f:
 		return c1 * (c0 ^ h ^ uintptr(fastrand())) // any kind of NaN
 	default:
 		return memhash(p, h, 8)
 	}
 }

 func c64hash(p unsafe.Pointer, h uintptr) uintptr {
 	x := (*[2]float32)(p)
 	return f32hash(unsafe.Pointer(&x[1]), f32hash(unsafe.Pointer(&x[0]), h))
 }

 func c128hash(p unsafe.Pointer, h uintptr) uintptr {
 	x := (*[2]float64)(p)
 	return f64hash(unsafe.Pointer(&x[1]), f64hash(unsafe.Pointer(&x[0]), h))
 }

 func interhash(p unsafe.Pointer, h uintptr) uintptr {
 	a := (*iface)(p)
 	tab := a.tab
 	if tab == nil {
 		return h
 	}
 	t := *(**_type)(tab)
 	fn := t.hashfn
 	if fn == nil {
 		panic(errorString("hash of unhashable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return c1 * fn(unsafe.Pointer(&a.data), h^c0)
 	} else {
 		return c1 * fn(a.data, h^c0)
 	}
 }

 func nilinterhash(p unsafe.Pointer, h uintptr) uintptr {
 	a := (*eface)(p)
 	t := a._type
 	if t == nil {
 		return h
 	}
 	fn := t.hashfn
 	if fn == nil {
 		panic(errorString("hash of unhashable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return c1 * fn(unsafe.Pointer(&a.data), h^c0)
 	} else {
 		return c1 * fn(a.data, h^c0)
 	}
 }

 func memequal0(p, q unsafe.Pointer) bool {
 	return true
 }
 func memequal8(p, q unsafe.Pointer) bool {
 	return *(*int8)(p) == *(*int8)(q)
 }
 func memequal16(p, q unsafe.Pointer) bool {
 	return *(*int16)(p) == *(*int16)(q)
 }
 func memequal32(p, q unsafe.Pointer) bool {
 	return *(*int32)(p) == *(*int32)(q)
 }
 func memequal64(p, q unsafe.Pointer) bool {
 	return *(*int64)(p) == *(*int64)(q)
 }
 func memequal128(p, q unsafe.Pointer) bool {
 	return *(*[2]int64)(p) == *(*[2]int64)(q)
 }
 func f32equal(p, q unsafe.Pointer) bool {
 	return *(*float32)(p) == *(*float32)(q)
 }
 func f64equal(p, q unsafe.Pointer) bool {
 	return *(*float64)(p) == *(*float64)(q)
 }
 func c64equal(p, q unsafe.Pointer) bool {
 	return *(*complex64)(p) == *(*complex64)(q)
 }
 func c128equal(p, q unsafe.Pointer) bool {
 	return *(*complex128)(p) == *(*complex128)(q)
 }
 func strequal(p, q unsafe.Pointer) bool {
 	return *(*string)(p) == *(*string)(q)
 }
 func interequal(p, q unsafe.Pointer) bool {
 	return ifaceeq(*(*iface)(p), *(*iface)(q))
 }
 func nilinterequal(p, q unsafe.Pointer) bool {
 	return efaceeq(*(*eface)(p), *(*eface)(q))
 }
 func efaceeq(x, y eface) bool {
 	t := x._type
 	if !eqtype(t, y._type) {
 		return false
 	}
 	if t == nil {
 		return true
 	}
 	eq := t.equalfn
 	if eq == nil {
 		panic(errorString("comparing uncomparable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return x.data == y.data
 	}
 	return eq(x.data, y.data)
 }
 func ifaceeq(x, y iface) bool {
 	xtab := x.tab
 	if xtab == nil && y.tab == nil {
 		return true
 	}
 	if xtab == nil || y.tab == nil {
 		return false
 	}
 	t := *(**_type)(xtab)
 	if !eqtype(t, *(**_type)(y.tab)) {
 		return false
 	}
 	eq := t.equalfn
 	if eq == nil {
 		panic(errorString("comparing uncomparable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return x.data == y.data
 	}
 	return eq(x.data, y.data)
 }

 func ifacevaleq(x iface, t *_type, p unsafe.Pointer) bool {
 	if x.tab == nil {
 		return false
 	}
 	xt := *(**_type)(x.tab)
 	if !eqtype(xt, t) {
 		return false
 	}
 	eq := t.equalfn
 	if eq == nil {
 		panic(errorString("comparing uncomparable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return x.data == p
 	}
 	return eq(x.data, p)
 }

 func ifaceefaceeq(x iface, y eface) bool {
 	if x.tab == nil && y._type == nil {
 		return true
 	}
 	if x.tab == nil || y._type == nil {
 		return false
 	}
 	xt := *(**_type)(x.tab)
 	if !eqtype(xt, y._type) {
 		return false
 	}
 	eq := xt.equalfn
 	if eq == nil {
 		panic(errorString("comparing uncomparable type " + xt.string()))
 	}
 	if isDirectIface(xt) {
 		return x.data == y.data
 	}
 	return eq(x.data, y.data)
 }

 func efacevaleq(x eface, t *_type, p unsafe.Pointer) bool {
 	if x._type == nil {
 		return false
 	}
 	if !eqtype(x._type, t) {
 		return false
 	}
 	eq := t.equalfn
 	if eq == nil {
 		panic(errorString("comparing uncomparable type " + t.string()))
 	}
 	if isDirectIface(t) {
 		return x.data == p
 	}
 	return eq(x.data, p)
 }

 func cmpstring(x, y string) int {
 	a := stringStructOf(&x)
 	b := stringStructOf(&y)
 	l := a.len
 	if l > b.len {
 		l = b.len
 	}
 	i := memcmp(unsafe.Pointer(a.str), unsafe.Pointer(b.str), uintptr(l))
 	if i != 0 {
 		return int(i)
 	}
 	if a.len < b.len {
 		return -1
 	} else if a.len > b.len {
 		return 1
 	}
 	return 0
 }

 // For the unsafe.Pointer type descriptor in libgo/runtime/go-unsafe-pointer.c.

 func pointerhash(p unsafe.Pointer, h uintptr) uintptr {
 	return memhash(p, h, unsafe.Sizeof(unsafe.Pointer))
 }

 func pointerequal(p, q unsafe.Pointer) bool {
 	return *(*unsafe.Pointer)(p) == *(*unsafe.Pointer)(q)
 }

 // Force the creation of function descriptors for equality and hash
 // functions.  These will be referenced directly by the compiler.
 var _ = memhash
 var _ = memhash0
 var _ = memhash8
 var _ = memhash16
 var _ = memhash32
 var _ = memhash64
 var _ = memhash128
 var _ = strhash
 var _ = f32hash
 var _ = f64hash
 var _ = c64hash
 var _ = c128hash
 var _ = interhash
 var _ = nilinterhash
 var _ = memequal0
 var _ = memequal8
 var _ = memequal16
 var _ = memequal32
 var _ = memequal64
 var _ = memequal128
 var _ = f32equal
 var _ = f64equal
 var _ = c64equal
 var _ = c128equal
 var _ = strequal
 var _ = interequal
 var _ = nilinterequal
 var _ = pointerhash
 var _ = pointerequal

 // Testing adapters for hash quality tests (see hash_test.go)
 func stringHash(s string, seed uintptr) uintptr {
 	return strhash(noescape(unsafe.Pointer(&s)), seed)
 }

 func bytesHash(b []byte, seed uintptr) uintptr {
 	s := (*slice)(unsafe.Pointer(&b))
 	return memhash(s.array, seed, uintptr(s.len))
 }

 func int32Hash(i uint32, seed uintptr) uintptr {
 	return memhash32(noescape(unsafe.Pointer(&i)), seed)
 }

 func int64Hash(i uint64, seed uintptr) uintptr {
 	return memhash64(noescape(unsafe.Pointer(&i)), seed)
 }

 func efaceHash(i interface{}, seed uintptr) uintptr {
 	return nilinterhash(noescape(unsafe.Pointer(&i)), seed)
 }

 func ifaceHash(i interface {
 	F()
 }, seed uintptr) uintptr {
 	return interhash(noescape(unsafe.Pointer(&i)), seed)
 }

 const hashRandomBytes = sys.PtrSize / 4 * 64

 // used in asm_{386,amd64,arm64}.s to seed the hash function
 var aeskeysched [hashRandomBytes]byte

 // used in hash{32,64}.go to seed the hash function
 var hashkey [4]uintptr

 func alginit() {
 	// Install AES hash algorithms if the instructions needed are present.
 	if (GOARCH == "386" || GOARCH == "amd64") &&
 		GOOS != "nacl" &&
 		support_aes &&
 		cpu.X86.HasAES && // AESENC
 		cpu.X86.HasSSSE3 && // PSHUFB
 		cpu.X86.HasSSE41 { // PINSR{D,Q}
 		initAlgAES()
 		return
 	}
 	if GOARCH == "arm64" && cpu.ARM64.HasAES {
 		initAlgAES()
 		return
 	}
 	getRandomData((*[len(hashkey) * sys.PtrSize]byte)(unsafe.Pointer(&hashkey))[:])
 	hashkey[0] |= 1 // make sure these numbers are odd
 	hashkey[1] |= 1
 	hashkey[2] |= 1
 	hashkey[3] |= 1
 }

 func initAlgAES() {
 	useAeshash = true
 	// Initialize with random data so hash collisions will be hard to engineer.
 	getRandomData(aeskeysched[:])
 }
	// Copyright 2014 The Go Authors. All rights reserved.
	// Use of this source code is governed by a BSD-style
	// license that can be found in the LICENSE file.

	package runtime

	import (
	"internal/cpu"
	"runtime/internal/sys"
	"unsafe"
	)

	// For gccgo, use go:linkname to rename compiler-called functions to
	// themselves, so that the compiler will export them.
	//
	//go:linkname memhash0 runtime.memhash0
	//go:linkname memhash8 runtime.memhash8
	//go:linkname memhash16 runtime.memhash16
	//go:linkname memhash32 runtime.memhash32
	//go:linkname memhash64 runtime.memhash64
	//go:linkname memhash128 runtime.memhash128
	//go:linkname strhash runtime.strhash
	//go:linkname f32hash runtime.f32hash
	//go:linkname f64hash runtime.f64hash
	//go:linkname c64hash runtime.c64hash
	//go:linkname c128hash runtime.c128hash
	//go:linkname interhash runtime.interhash
	//go:linkname nilinterhash runtime.nilinterhash
	//go:linkname memequal0 runtime.memequal0
	//go:linkname memequal8 runtime.memequal8
	//go:linkname memequal16 runtime.memequal16
	//go:linkname memequal32 runtime.memequal32
	//go:linkname memequal64 runtime.memequal64
	//go:linkname memequal128 runtime.memequal128
	//go:linkname strequal runtime.strequal
	//go:linkname f32equal runtime.f32equal
	//go:linkname f64equal runtime.f64equal
	//go:linkname c64equal runtime.c64equal
	//go:linkname c128equal runtime.c128equal
	//go:linkname interequal runtime.interequal
	//go:linkname nilinterequal runtime.nilinterequal
	//go:linkname efaceeq runtime.efaceeq
	//go:linkname ifaceeq runtime.ifaceeq
	//go:linkname ifacevaleq runtime.ifacevaleq
	//go:linkname ifaceefaceeq runtime.ifaceefaceeq
	//go:linkname efacevaleq runtime.efacevaleq
	//go:linkname eqstring runtime.eqstring
	//go:linkname cmpstring runtime.cmpstring
	//
	// Temporary to be called from C code.
	//go:linkname alginit runtime.alginit

	const (
	c0 = uintptr((8-sys.PtrSize)/42860486313 + (sys.PtrSize-4)/433054211828000289)
	c1 = uintptr((8-sys.PtrSize)/43267000013 + (sys.PtrSize-4)/423344194077549503)
	)

	func memhash0(p unsafe.Pointer, h uintptr) uintptr {
	return h
	}

	func memhash8(p unsafe.Pointer, h uintptr) uintptr {
	return memhash(p, h, 1)
	}

	func memhash16(p unsafe.Pointer, h uintptr) uintptr {
	return memhash(p, h, 2)
	}

	func memhash128(p unsafe.Pointer, h uintptr) uintptr {
	return memhash(p, h, 16)
	}

	var useAeshash bool

	// in C code
	func aeshashbody(p unsafe.Pointer, h, s uintptr, sched []byte) uintptr

	func aeshash(p unsafe.Pointer, h, s uintptr) uintptr {
	return aeshashbody(p, h, s, aeskeysched[:])
	}

	func aeshashstr(p unsafe.Pointer, h uintptr) uintptr {
	ps := (*stringStruct)(p)
	return aeshashbody(unsafe.Pointer(ps.str), h, uintptr(ps.len), aeskeysched[:])
	}

	func strhash(a unsafe.Pointer, h uintptr) uintptr {
	x := (*stringStruct)(a)
	return memhash(x.str, h, uintptr(x.len))
	}

	// NOTE: Because NaN != NaN, a map can contain any
	// number of (mostly useless) entries keyed with NaNs.
	// To avoid long hash chains, we assign a random number
	// as the hash value for a NaN.

	func f32hash(p unsafe.Pointer, h uintptr) uintptr {
	f := (float32)(p)
	switch {
	case f == 0:
	return c1 * (c0 ^ h) // +0, -0
	case f != f:
	return c1 * (c0 ^ h ^ uintptr(fastrand())) // any kind of NaN
	default:
	return memhash(p, h, 4)
	}
	}

	func f64hash(p unsafe.Pointer, h uintptr) uintptr {
	f := (float64)(p)
	switch {
	case f == 0:
	return c1 * (c0 ^ h) // +0, -0
	case f != f:
	return c1 * (c0 ^ h ^ uintptr(fastrand())) // any kind of NaN
	default:
	return memhash(p, h, 8)
	}
	}

	func c64hash(p unsafe.Pointer, h uintptr) uintptr {
	x := (*[2]float32)(p)
	return f32hash(unsafe.Pointer(&x[1]), f32hash(unsafe.Pointer(&x[0]), h))
	}

	func c128hash(p unsafe.Pointer, h uintptr) uintptr {
	x := (*[2]float64)(p)
	return f64hash(unsafe.Pointer(&x[1]), f64hash(unsafe.Pointer(&x[0]), h))
	}

	func interhash(p unsafe.Pointer, h uintptr) uintptr {
	a := (*iface)(p)
	tab := a.tab
	if tab == nil {
	return h
	}
	t := (*_type)(tab)
	fn := t.hashfn
	if fn == nil {
	panic(errorString("hash of unhashable type " + t.string()))
	}
	if isDirectIface(t) {
	return c1 * fn(unsafe.Pointer(&a.data), h^c0)
	} else {
	return c1 * fn(a.data, h^c0)
	}
	}

	func nilinterhash(p unsafe.Pointer, h uintptr) uintptr {
	a := (*eface)(p)
	t := a._type
	if t == nil {
	return h
	}
	fn := t.hashfn
	if fn == nil {
	panic(errorString("hash of unhashable type " + t.string()))
	}
	if isDirectIface(t) {
	return c1 * fn(unsafe.Pointer(&a.data), h^c0)
	} else {
	return c1 * fn(a.data, h^c0)
	}
	}

	func memequal0(p, q unsafe.Pointer) bool {
	return true
	}
	func memequal8(p, q unsafe.Pointer) bool {
	return (int8)(p) == (int8)(q)
	}
	func memequal16(p, q unsafe.Pointer) bool {
	return (int16)(p) == (int16)(q)
	}
	func memequal32(p, q unsafe.Pointer) bool {
	return (int32)(p) == (int32)(q)
	}
	func memequal64(p, q unsafe.Pointer) bool {
	return (int64)(p) == (int64)(q)
	}
	func memequal128(p, q unsafe.Pointer) bool {
	return ([2]int64)(p) == ([2]int64)(q)
	}
	func f32equal(p, q unsafe.Pointer) bool {
	return (float32)(p) == (float32)(q)
	}
	func f64equal(p, q unsafe.Pointer) bool {
	return (float64)(p) == (float64)(q)
	}
	func c64equal(p, q unsafe.Pointer) bool {
	return (complex64)(p) == (complex64)(q)
	}
	func c128equal(p, q unsafe.Pointer) bool {
	return (complex128)(p) == (complex128)(q)
	}
	func strequal(p, q unsafe.Pointer) bool {
	return (string)(p) == (string)(q)
	}
	func interequal(p, q unsafe.Pointer) bool {
	return ifaceeq((iface)(p), (iface)(q))
	}
	func nilinterequal(p, q unsafe.Pointer) bool {
	return efaceeq((eface)(p), (eface)(q))
	}
	func efaceeq(x, y eface) bool {
	t := x._type
	if !eqtype(t, y._type) {
	return false
	}
	if t == nil {
	return true
	}
	eq := t.equalfn
	if eq == nil {
	panic(errorString("comparing uncomparable type " + t.string()))
	}
	if isDirectIface(t) {
	return x.data == y.data
	}
	return eq(x.data, y.data)
	}
	func ifaceeq(x, y iface) bool {
	xtab := x.tab
	if xtab == nil && y.tab == nil {
	return true
	}
	if xtab == nil \|\| y.tab == nil {
	return false
	}
	t := (*_type)(xtab)
	if !eqtype(t, (*_type)(y.tab)) {
	return false
	}
	eq := t.equalfn
	if eq == nil {
	panic(errorString("comparing uncomparable type " + t.string()))
	}
	if isDirectIface(t) {
	return x.data == y.data
	}
	return eq(x.data, y.data)
	}

	func ifacevaleq(x iface, t *_type, p unsafe.Pointer) bool {
	if x.tab == nil {
	return false
	}
	xt := (*_type)(x.tab)
	if !eqtype(xt, t) {
	return false
	}
	eq := t.equalfn
	if eq == nil {
	panic(errorString("comparing uncomparable type " + t.string()))
	}
	if isDirectIface(t) {
	return x.data == p
	}
	return eq(x.data, p)
	}

	func ifaceefaceeq(x iface, y eface) bool {
	if x.tab == nil && y._type == nil {
	return true
	}
	if x.tab == nil \|\| y._type == nil {
	return false
	}
	xt := (*_type)(x.tab)
	if !eqtype(xt, y._type) {
	return false
	}
	eq := xt.equalfn
	if eq == nil {
	panic(errorString("comparing uncomparable type " + xt.string()))
	}
	if isDirectIface(xt) {
	return x.data == y.data
	}
	return eq(x.data, y.data)
	}

	func efacevaleq(x eface, t *_type, p unsafe.Pointer) bool {
	if x._type == nil {
	return false
	}
	if !eqtype(x._type, t) {
	return false
	}
	eq := t.equalfn
	if eq == nil {
	panic(errorString("comparing uncomparable type " + t.string()))
	}
	if isDirectIface(t) {
	return x.data == p
	}
	return eq(x.data, p)
	}

	func cmpstring(x, y string) int {
	a := stringStructOf(&x)
	b := stringStructOf(&y)
	l := a.len
	if l > b.len {
	l = b.len
	}
	i := memcmp(unsafe.Pointer(a.str), unsafe.Pointer(b.str), uintptr(l))
	if i != 0 {
	return int(i)
	}
	if a.len < b.len {
	return -1
	} else if a.len > b.len {
	return 1
	}
	return 0
	}

	// For the unsafe.Pointer type descriptor in libgo/runtime/go-unsafe-pointer.c.

	func pointerhash(p unsafe.Pointer, h uintptr) uintptr {
	return memhash(p, h, unsafe.Sizeof(unsafe.Pointer))
	}

	func pointerequal(p, q unsafe.Pointer) bool {
	return (unsafe.Pointer)(p) == (unsafe.Pointer)(q)
	}

	// Force the creation of function descriptors for equality and hash
	// functions. These will be referenced directly by the compiler.
	var _ = memhash
	var _ = memhash0
	var _ = memhash8
	var _ = memhash16
	var _ = memhash32
	var _ = memhash64
	var _ = memhash128
	var _ = strhash
	var _ = f32hash
	var _ = f64hash
	var _ = c64hash
	var _ = c128hash
	var _ = interhash
	var _ = nilinterhash
	var _ = memequal0
	var _ = memequal8
	var _ = memequal16
	var _ = memequal32
	var _ = memequal64
	var _ = memequal128
	var _ = f32equal
	var _ = f64equal
	var _ = c64equal
	var _ = c128equal
	var _ = strequal
	var _ = interequal
	var _ = nilinterequal
	var _ = pointerhash
	var _ = pointerequal

	// Testing adapters for hash quality tests (see hash_test.go)
	func stringHash(s string, seed uintptr) uintptr {
	return strhash(noescape(unsafe.Pointer(&s)), seed)
	}

	func bytesHash(b []byte, seed uintptr) uintptr {
	s := (*slice)(unsafe.Pointer(&b))
	return memhash(s.array, seed, uintptr(s.len))
	}

	func int32Hash(i uint32, seed uintptr) uintptr {
	return memhash32(noescape(unsafe.Pointer(&i)), seed)
	}

	func int64Hash(i uint64, seed uintptr) uintptr {
	return memhash64(noescape(unsafe.Pointer(&i)), seed)
	}

	func efaceHash(i interface{}, seed uintptr) uintptr {
	return nilinterhash(noescape(unsafe.Pointer(&i)), seed)
	}

	func ifaceHash(i interface {
	F()
	}, seed uintptr) uintptr {
	return interhash(noescape(unsafe.Pointer(&i)), seed)
	}

	const hashRandomBytes = sys.PtrSize / 4 * 64

	// used in asm_{386,amd64,arm64}.s to seed the hash function
	var aeskeysched [hashRandomBytes]byte

	// used in hash{32,64}.go to seed the hash function
	var hashkey [4]uintptr

	func alginit() {
	// Install AES hash algorithms if the instructions needed are present.
	if (GOARCH == "386" \|\| GOARCH == "amd64") &&
	GOOS != "nacl" &&
	support_aes &&
	cpu.X86.HasAES && // AESENC
	cpu.X86.HasSSSE3 && // PSHUFB
	cpu.X86.HasSSE41 { // PINSR{D,Q}
	initAlgAES()
	return
	}
	if GOARCH == "arm64" && cpu.ARM64.HasAES {
	initAlgAES()
	return
	}
	getRandomData(([len(hashkey) sys.PtrSize]byte)(unsafe.Pointer(&hashkey))[:])
	hashkey[0] \|= 1 // make sure these numbers are odd
	hashkey[1] \|= 1
	hashkey[2] \|= 1
	hashkey[3] \|= 1
	}

	func initAlgAES() {
	useAeshash = true
	// Initialize with random data so hash collisions will be hard to engineer.
	getRandomData(aeskeysched[:])
	}