Source file src/github.com/bits-and-blooms/bitset/popcnt_amd64.go

Documentation: github.com/bits-and-blooms/bitset

     1  // +build !go1.9
     2  // +build amd64,!appengine
     3  
     4  package bitset
     5  
     6  // *** the following functions are defined in popcnt_amd64.s
     7  
     8  //go:noescape
     9  
    10  func hasAsm() bool
    11  
    12  // useAsm is a flag used to select the GO or ASM implementation of the popcnt function
    13  var useAsm = hasAsm()
    14  
    15  //go:noescape
    16  
    17  func popcntSliceAsm(s []uint64) uint64
    18  
    19  //go:noescape
    20  
    21  func popcntMaskSliceAsm(s, m []uint64) uint64
    22  
    23  //go:noescape
    24  
    25  func popcntAndSliceAsm(s, m []uint64) uint64
    26  
    27  //go:noescape
    28  
    29  func popcntOrSliceAsm(s, m []uint64) uint64
    30  
    31  //go:noescape
    32  
    33  func popcntXorSliceAsm(s, m []uint64) uint64
    34  
    35  func popcntSlice(s []uint64) uint64 {
    36  	if useAsm {
    37  		return popcntSliceAsm(s)
    38  	}
    39  	return popcntSliceGo(s)
    40  }
    41  
    42  func popcntMaskSlice(s, m []uint64) uint64 {
    43  	if useAsm {
    44  		return popcntMaskSliceAsm(s, m)
    45  	}
    46  	return popcntMaskSliceGo(s, m)
    47  }
    48  
    49  func popcntAndSlice(s, m []uint64) uint64 {
    50  	if useAsm {
    51  		return popcntAndSliceAsm(s, m)
    52  	}
    53  	return popcntAndSliceGo(s, m)
    54  }
    55  
    56  func popcntOrSlice(s, m []uint64) uint64 {
    57  	if useAsm {
    58  		return popcntOrSliceAsm(s, m)
    59  	}
    60  	return popcntOrSliceGo(s, m)
    61  }
    62  
    63  func popcntXorSlice(s, m []uint64) uint64 {
    64  	if useAsm {
    65  		return popcntXorSliceAsm(s, m)
    66  	}
    67  	return popcntXorSliceGo(s, m)
    68  }
    69  

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