Source file src/golang.org/x/crypto/argon2/blamka_amd64.go

Documentation: golang.org/x/crypto/argon2

     1  // Copyright 2017 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 amd64 && gc && !purego
     6  
     7  package argon2
     8  
     9  import "golang.org/x/sys/cpu"
    10  
    11  func init() {
    12  	useSSE4 = cpu.X86.HasSSE41
    13  }
    14  
    15  //go:noescape
    16  func mixBlocksSSE2(out, a, b, c *block)
    17  
    18  //go:noescape
    19  func xorBlocksSSE2(out, a, b, c *block)
    20  
    21  //go:noescape
    22  func blamkaSSE4(b *block)
    23  
    24  func processBlockSSE(out, in1, in2 *block, xor bool) {
    25  	var t block
    26  	mixBlocksSSE2(&t, in1, in2, &t)
    27  	if useSSE4 {
    28  		blamkaSSE4(&t)
    29  	} else {
    30  		for i := 0; i < blockLength; i += 16 {
    31  			blamkaGeneric(
    32  				&t[i+0], &t[i+1], &t[i+2], &t[i+3],
    33  				&t[i+4], &t[i+5], &t[i+6], &t[i+7],
    34  				&t[i+8], &t[i+9], &t[i+10], &t[i+11],
    35  				&t[i+12], &t[i+13], &t[i+14], &t[i+15],
    36  			)
    37  		}
    38  		for i := 0; i < blockLength/8; i += 2 {
    39  			blamkaGeneric(
    40  				&t[i], &t[i+1], &t[16+i], &t[16+i+1],
    41  				&t[32+i], &t[32+i+1], &t[48+i], &t[48+i+1],
    42  				&t[64+i], &t[64+i+1], &t[80+i], &t[80+i+1],
    43  				&t[96+i], &t[96+i+1], &t[112+i], &t[112+i+1],
    44  			)
    45  		}
    46  	}
    47  	if xor {
    48  		xorBlocksSSE2(out, in1, in2, &t)
    49  	} else {
    50  		mixBlocksSSE2(out, in1, in2, &t)
    51  	}
    52  }
    53  
    54  func processBlock(out, in1, in2 *block) {
    55  	processBlockSSE(out, in1, in2, false)
    56  }
    57  
    58  func processBlockXOR(out, in1, in2 *block) {
    59  	processBlockSSE(out, in1, in2, true)
    60  }
    61  

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