// Copyright 2017 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.//+build gccgo appengine !s390xpackagesha3// newShake128Asm returns an assembly implementation of SHAKE-128 if available,// otherwise it returns nil.funcnewShake128Asm()ShakeHash{returnnil}// newShake256Asm returns an assembly implementation of SHAKE-256 if available,// otherwise it returns nil.funcnewShake256Asm()ShakeHash{returnnil}