github.com/fisco-bcos/crypto@v0.0.0-20200202032121-bd8ab0b5d4f1/internal/bytealg/bytealg.go (about)

     1  // Copyright 2018 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  package bytealg
     6  
     7  import (
     8  	"internal/cpu"
     9  	"unsafe"
    10  )
    11  
    12  // Offsets into internal/cpu records for use in assembly.
    13  const (
    14  	offsetX86HasSSE2   = unsafe.Offsetof(cpu.X86.HasSSE2)
    15  	offsetX86HasSSE42  = unsafe.Offsetof(cpu.X86.HasSSE42)
    16  	offsetX86HasAVX2   = unsafe.Offsetof(cpu.X86.HasAVX2)
    17  	offsetX86HasPOPCNT = unsafe.Offsetof(cpu.X86.HasPOPCNT)
    18  
    19  	offsetS390xHasVX = unsafe.Offsetof(cpu.S390X.HasVX)
    20  )
    21  
    22  // MaxLen is the maximum length of the string to be searched for (argument b) in Index.
    23  var MaxLen int