a, b := mix32(uint32(seed), uint32(8^hashkey[0]))
	a ^= readUnaligned32(p)
	b ^= readUnaligned32(add(p, 4))
	a, b = mix32(a, b)
	a, b = mix32(a, b)
	return uintptr(a ^ b)
}

func memhashFallback(p unsafe.Pointer, seed, s uintptr) uintptr {

	a, b := mix32(uint32(seed), uint32(s^hashkey[0]))
	if s == 0 {
		return uintptr(a ^ b)
	}
	for ; s > 8; s -= 8 {
		a ^= readUnaligned32(p)

package runtime

import (
	"runtime/internal/math"
	"unsafe"
)

const (
	m5 = 0x1d8e4e27c47d124f
)

func memhashFallback(p unsafe.Pointer, seed, s uintptr) uintptr {
	var a, b uintptr
	seed ^= hashkey[0]
	switch {
	case s == 0:
		return seed
	case s < 4:
		a = uintptr(*(*byte)(p))
		a |= uintptr(*(*byte)(add(p, s>>1))) << 8