github.com/c12o16h1/go/src@v0.0.0-20200114212001-5a151c0f00ed/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  import "github.com/c12o16h1/go/src/internal/cpu"
    10  
    11  //go:noescape
    12  func blockAVX2(dig *digest, p []byte)
    13  
    14  //go:noescape
    15  func blockAMD64(dig *digest, p []byte)
    16  
    17  var useAVX2 = cpu.X86.HasAVX2 && cpu.X86.HasBMI1 && cpu.X86.HasBMI2
    18  
    19  func block(dig *digest, p []byte) {
    20  	if useAVX2 {
    21  		blockAVX2(dig, p)
    22  	} else {
    23  		blockAMD64(dig, p)
    24  	}
    25  }