func NewS64(seed uint64) (xx *XXHash64) {
	xx = &XXHash64{
		seed: seed,
	}
	xx.Reset()
	return
}
func NewS64(seed uint64) (xx *XXHash64) {
	xx = &XXHash64{
		seed: seed,
	}
	xx.Reset()
	return
}
func NewS64 ( seed uint64 ) ( xx * XXHash64 ) { xx = & XXHash64 { seed : seed , } xx . Reset ( ) return }
// NewS64 creates a new hash.Hash64 computing the 64bit xxHash checksum starting with the specific seed.
NewS64 creates a new hash . Hash64 computing the 64bit xxHash checksum starting with the specific seed .