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Source file src/runtime/noasm.go

Documentation: runtime

     1  // Copyright 2013 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  // Routines that are implemented in assembly in asm_{amd64,386,arm,arm64,ppc64x,s390x}.s
     6  // These routines have corresponding stubs in stubs_asm.go.
     7  
     8  // +build mips64 mips64le
     9  
    10  package runtime
    11  
    12  import _ "unsafe" // for go:linkname
    13  
    14  func cmpstring(s1, s2 string) int {
    15  	l := len(s1)
    16  	if len(s2) < l {
    17  		l = len(s2)
    18  	}
    19  	for i := 0; i < l; i++ {
    20  		c1, c2 := s1[i], s2[i]
    21  		if c1 < c2 {
    22  			return -1
    23  		}
    24  		if c1 > c2 {
    25  			return +1
    26  		}
    27  	}
    28  	if len(s1) < len(s2) {
    29  		return -1
    30  	}
    31  	if len(s1) > len(s2) {
    32  		return +1
    33  	}
    34  	return 0
    35  }
    36  
    37  //go:linkname bytes_Compare bytes.Compare
    38  func bytes_Compare(s1, s2 []byte) int {
    39  	l := len(s1)
    40  	if len(s2) < l {
    41  		l = len(s2)
    42  	}
    43  	if l == 0 || &s1[0] == &s2[0] {
    44  		goto samebytes
    45  	}
    46  	for i := 0; i < l; i++ {
    47  		c1, c2 := s1[i], s2[i]
    48  		if c1 < c2 {
    49  			return -1
    50  		}
    51  		if c1 > c2 {
    52  			return +1
    53  		}
    54  	}
    55  samebytes:
    56  	if len(s1) < len(s2) {
    57  		return -1
    58  	}
    59  	if len(s1) > len(s2) {
    60  		return +1
    61  	}
    62  	return 0
    63  }
    64  

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