hi, lo := math.Mul64(uint64(a), uint64(b))
	return uintptr(hi ^ lo)
}

func r4(p unsafe.Pointer) uintptr {
	return uintptr(readUnaligned32(p))
}

func r8(p unsafe.Pointer) uintptr {
	return uintptr(readUnaligned64(p))

			"float64bits",
			"funcspdelta",
			"getm",
			"getMCache",
			"isDirectIface",
			"itabHashFunc",
			"nextslicecap",
			"noescape",
			"pcvalueCacheKey",
			"rand32",
			"readUnaligned32",
			"readUnaligned64",
			"releasem",
			"roundupsize",
			"stackmapdata",
			"stringStructOf",
			"subtract1",
			"subtractb",
			"tophash",
			"(*bmap).keys",
			"(*bmap).overflow",
			"(*waitq).enqueue",

	var buf [16]byte
	p := unsafe.Pointer(&buf[0])
	var s uint64
	for i := 0; i < b.N; i++ {
		s += ReadUnaligned64(p)
	}
	sink = s
}

func BenchmarkUnalignedLoad(b *testing.B) {
	var buf [16]byte
	p := unsafe.Pointer(&buf[1])
	var s uint64
	for i := 0; i < b.N; i++ {
		s += ReadUnaligned64(p)
	}
	sink = s
}

func TestCollisions(t *testing.T) {
	if testing.Short() {

	if goarch.BigEndian {
		return uint32(q[3]) | uint32(q[2])<<8 | uint32(q[1])<<16 | uint32(q[0])<<24
	}
	return uint32(q[0]) | uint32(q[1])<<8 | uint32(q[2])<<16 | uint32(q[3])<<24
}

func readUnaligned64(p unsafe.Pointer) uint64 {
	q := (*[8]byte)(p)
	if goarch.BigEndian {
		return uint64(q[7]) | uint64(q[6])<<8 | uint64(q[5])<<16 | uint64(q[4])<<24 |

func SetTracebackEnv(level string) {
	setTraceback(level)
	traceback_env = traceback_cache
}

var ReadUnaligned32 = readUnaligned32
var ReadUnaligned64 = readUnaligned64

func CountPagesInUse() (pagesInUse, counted uintptr) {
	stw := stopTheWorld(stwForTestCountPagesInUse)

	pagesInUse = mheap_.pagesInUse.Load()

	for _, s := range mheap_.allspans {

			return true
		}
		bits := *(*uint8)(add(liveInfo, uintptr(liveIdx)+uintptr(slotIdx/8)))
		return bits&(1<<(slotIdx%8)) != 0
	}

	print1 := func(off, sz, slotIdx uint8) {
		x := readUnaligned64(add(argp, uintptr(off)))
		// mask out irrelevant bits
		if sz < 8 {
			shift := 64 - sz*8
			if goarch.BigEndian {
				x = x >> shift
			} else {
				x = x << shift >> shift
			}
		}