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Linux/arch/sparc/lib/strncmp_32.S

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  1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*
  3  * strncmp.S: Hand optimized Sparc assembly of GCC output from GNU libc
  4  *            generic strncmp routine.
  5  */
  6 
  7 #include <linux/export.h>
  8 #include <linux/linkage.h>
  9 
 10         .text
 11 ENTRY(strncmp)
 12         mov     %o0, %g3
 13         mov     0, %o3
 14 
 15         cmp     %o2, 3
 16         ble     7f
 17          mov    0, %g2
 18 
 19         sra     %o2, 2, %o4
 20         ldub    [%g3], %o3
 21 
 22 0:
 23         ldub    [%o1], %g2
 24         add     %g3, 1, %g3
 25         and     %o3, 0xff, %o0
 26 
 27         cmp     %o0, 0
 28         be      8f
 29          add    %o1, 1, %o1
 30 
 31         cmp     %o0, %g2
 32         be,a    1f
 33          ldub   [%g3], %o3
 34 
 35         retl
 36          sub    %o0, %g2, %o0
 37 
 38 1:
 39         ldub    [%o1], %g2
 40         add     %g3,1, %g3
 41         and     %o3, 0xff, %o0
 42 
 43         cmp     %o0, 0
 44         be      8f
 45          add    %o1, 1, %o1
 46 
 47         cmp     %o0, %g2
 48         be,a    1f
 49          ldub   [%g3], %o3
 50 
 51         retl
 52          sub    %o0, %g2, %o0
 53 
 54 1:
 55         ldub    [%o1], %g2
 56         add     %g3, 1, %g3
 57         and     %o3, 0xff, %o0
 58 
 59         cmp     %o0, 0
 60         be      8f
 61          add    %o1, 1, %o1
 62 
 63         cmp     %o0, %g2
 64         be,a    1f
 65          ldub   [%g3], %o3
 66 
 67         retl
 68          sub    %o0, %g2, %o0
 69 
 70 1:
 71         ldub    [%o1], %g2
 72         add     %g3, 1, %g3
 73         and     %o3, 0xff, %o0
 74 
 75         cmp     %o0, 0
 76         be      8f
 77          add    %o1, 1, %o1
 78 
 79         cmp     %o0, %g2
 80         be      1f
 81          add    %o4, -1, %o4
 82 
 83         retl
 84          sub    %o0, %g2, %o0
 85 
 86 1:
 87 
 88         cmp     %o4, 0
 89         bg,a    0b
 90          ldub   [%g3], %o3
 91 
 92         b       7f
 93          and    %o2, 3, %o2
 94 
 95 9:
 96         ldub    [%o1], %g2
 97         add     %g3, 1, %g3
 98         and     %o3, 0xff, %o0
 99 
100         cmp     %o0, 0
101         be      8f
102          add    %o1, 1, %o1
103 
104         cmp     %o0, %g2
105         be      7f
106          add    %o2, -1, %o2
107 
108 8:
109         retl
110          sub    %o0, %g2, %o0
111 
112 7:
113         cmp     %o2, 0
114         bg,a    9b
115          ldub   [%g3], %o3
116 
117         and     %g2, 0xff, %o0
118         retl
119          sub    %o3, %o0, %o0
120 ENDPROC(strncmp)
121 EXPORT_SYMBOL(strncmp)

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