You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: farmhashxo.go
    path of file: ./repos/goreportcard/vendor/github.com/dgryski/go-farm
    
    the code of the file until where you have to start completion: package farm

import (
	"encoding/binary"
	"math/bits"
)

func h32(s []byte, mul uint64) uint64 {
	slen := len(s)
	a := binary.LittleEndian.Uint64(s[0:0+8]) * k1
	b := binary.LittleEndian.Uint64(s[8 : 8+
    
func Hash64(s []byte) uint64 {
	slen := len(s)

	if slen <= 32 {
		if slen <= 16 {
			return hashLen0to16(s)
		} else {
			return hashLen17to32(s)
		}
	} else if slen <= 64 {
		return xohashLen33to64(s)
	} else if slen <= 96 {
		return xohashLen65to96(s)
	} else if slen <= 256 {
		return naHash64(s)
	} else {
		return uoHash64(s)
	}
}