xor_loong64.go

     1  // Copyright 2025 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 subtle
     8  
     9  import (
    10  	"crypto/internal/fips140deps/cpu"
    11  	"crypto/internal/impl"
    12  )
    13  
    14  var useLSX = cpu.LOONG64HasLSX
    15  var useLASX = cpu.LOONG64HasLASX
    16  
    17  func init() {
    18  	impl.Register("subtle", "LSX", &useLSX)
    19  	impl.Register("subtle", "LASX", &useLASX)
    20  }
    21  
    22  //go:noescape
    23  func xorBytesBasic(dst, a, b *byte, n int)
    24  
    25  //go:noescape
    26  func xorBytesLSX(dst, a, b *byte, n int)
    27  
    28  //go:noescape
    29  func xorBytesLASX(dst, a, b *byte, n int)
    30  
    31  func xorBytes(dst, a, b *byte, n int) {
    32  	if useLASX {
    33  		xorBytesLASX(dst, a, b, n)
    34  	} else if useLSX {
    35  		xorBytesLSX(dst, a, b, n)
    36  	} else {
    37  		xorBytesBasic(dst, a, b, n)
    38  	}
    39  }
    40
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