github.com/slayercat/go@v0.0.0-20170428012452-c51559813f61/src/crypto/sha512/sha512block_amd64.go (about)

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  // +build amd64
     6  
     7  package sha512
     8  
     9  //go:noescape
    10  func blockAVX2(dig *digest, p []byte)
    11  
    12  //go:noescape
    13  func blockAMD64(dig *digest, p []byte)
    14  
    15  //go:noescape
    16  func checkAVX2() bool
    17  
    18  var hasAVX2 = checkAVX2()
    19  
    20  func block(dig *digest, p []byte) {
    21  	if hasAVX2 {
    22  		blockAVX2(dig, p)
    23  	} else {
    24  		blockAMD64(dig, p)
    25  	}
    26  }