Source file src/crypto/internal/fips140/sha512/sha512block_s390x.go

     1  // Copyright 2016 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  //go:build !purego
     6  
     7  package sha512
     8  
     9  import (
    10  	"crypto/internal/fips140deps/cpu"
    11  	"crypto/internal/impl"
    12  )
    13  
    14  var useSHA512 = cpu.S390XHasSHA512
    15  
    16  func init() {
    17  	// CP Assist for Cryptographic Functions (CPACF)
    18  	// https://www.ibm.com/docs/en/zos/3.1.0?topic=icsf-cp-assist-cryptographic-functions-cpacf
    19  	impl.Register("sha512", "CPACF", &useSHA512)
    20  }
    21  
    22  //go:noescape
    23  func blockS390X(dig *Digest, p []byte)
    24  
    25  func block(dig *Digest, p []byte) {
    26  	if useSHA512 {
    27  		blockS390X(dig, p)
    28  	} else {
    29  		blockGeneric(dig, p)
    30  	}
    31  }
    32  

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