golang md5block_decl 代码
文件路径：/src/crypto/md5/md5block_decl.go
/ Copyright 2013 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.
/go:build amd64 || 386 || arm || ppc64le || ppc64 || s390x || arm64
package md5
const haveAsm = true
/go:noescape
func block(dig *digest, p []byte)