| 1 | /* memchr (str, ch, n) -- Return pointer to first occurrence of CH in STR less |
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| 2 | than N. |
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| 3 | For SPARC v7. |
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| 4 | Copyright (C) 1996-2024 Free Software Foundation, Inc. |
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| 5 | This file is part of the GNU C Library. |
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| 6 | |
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| 7 | The GNU C Library is free software; you can redistribute it and/or |
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| 8 | modify it under the terms of the GNU Lesser General Public |
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| 9 | License as published by the Free Software Foundation; either |
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| 10 | version 2.1 of the License, or (at your option) any later version. |
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| 11 | |
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| 12 | The GNU C Library is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 15 | Lesser General Public License for more details. |
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| 16 | |
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| 17 | You should have received a copy of the GNU Lesser General Public |
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| 18 | License along with the GNU C Library; if not, see |
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| 19 | <https://www.gnu.org/licenses/>. */ |
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| 20 | |
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| 21 | #include <sysdep.h> |
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| 22 | |
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| 23 | .text |
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| 24 | .align 4 |
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| 25 | ENTRY(__memchr) |
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| 26 | andcc %o1, 0xff, %o1 |
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| 27 | sll %o1, 8, %g6 |
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| 28 | andcc %o0, 3, %g0 |
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| 29 | or %o1, %g6, %g6 |
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| 30 | sll %g6, 16, %o3 |
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| 31 | be 10f |
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| 32 | or %o3, %g6, %g2 |
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| 33 | cmp %o2, 0 |
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| 34 | be 9f |
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| 35 | sethi %hi(0x80808080), %o4 |
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| 36 | ldub [%o0], %g4 |
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| 37 | cmp %g4, %o1 |
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| 38 | be 1f |
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| 39 | add %o0, 1, %o0 |
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| 40 | subcc %o2, 1, %o2 |
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| 41 | be 9f |
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| 42 | andcc %o0, 3, %g0 |
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| 43 | be 4f |
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| 44 | or %o4, %lo(0x80808080), %o3 |
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| 45 | ldub [%o0], %g4 |
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| 46 | cmp %g4, %o1 |
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| 47 | be 1f |
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| 48 | add %o0, 1, %o0 |
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| 49 | subcc %o2, 1, %o2 |
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| 50 | be 9f |
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| 51 | andcc %o0, 3, %g0 |
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| 52 | be 5f |
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| 53 | sethi %hi(0x01010101), %o5 |
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| 54 | ldub [%o0], %g4 |
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| 55 | cmp %g4, %o1 |
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| 56 | be 1f |
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| 57 | add %o0, 1, %o0 |
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| 58 | subcc %o2, 1, %o2 |
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| 59 | bne,a 7f |
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| 60 | and %o2, 3, %g1 |
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| 61 | retl |
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| 62 | clr %o0 |
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| 63 | 1: retl |
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| 64 | sub %o0, 1, %o0 |
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| 65 | 10: sethi %hi(0x80808080), %o4 |
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| 66 | or %o4, %lo(0x80808080), %o3 |
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| 67 | 4: sethi %hi(0x01010101), %o5 |
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| 68 | 5: and %o2, 3, %g1 |
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| 69 | 7: andcc %o2, 0xfffffffc, %o2 |
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| 70 | be 0f |
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| 71 | or %o5, %lo(0x01010101), %g6 |
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| 72 | ld [%o0], %g4 |
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| 73 | 6: xor %g4, %g2, %g5 |
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| 74 | add %o0, 4, %o0 |
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| 75 | sub %g5, %g6, %g5 |
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| 76 | andcc %g5, %o3, %g0 |
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| 77 | bne 8f |
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| 78 | subcc %o2, 4, %o2 |
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| 79 | bne,a 6b |
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| 80 | ld [%o0], %g4 |
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| 81 | 0: cmp %g1, 0 |
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| 82 | 1: be 9f |
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| 83 | add %o0, 4, %o0 |
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| 84 | ldub [%o0 - 4], %g4 |
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| 85 | cmp %g4, %o1 |
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| 86 | be 4f |
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| 87 | cmp %g1, 1 |
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| 88 | be 9f |
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| 89 | ldub [%o0 - 3], %g4 |
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| 90 | cmp %g4, %o1 |
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| 91 | be 3f |
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| 92 | cmp %g1, 2 |
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| 93 | be 9f |
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| 94 | ldub [%o0 - 2], %g4 |
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| 95 | cmp %g4, %o1 |
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| 96 | be 2f |
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| 97 | nop |
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| 98 | 9: retl |
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| 99 | clr %o0 |
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| 100 | |
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| 101 | /* Check every byte. */ |
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| 102 | 8: srl %g4, 24, %g5 |
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| 103 | and %g5, 0xff, %g5 |
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| 104 | cmp %g5, %o1 |
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| 105 | be 4f |
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| 106 | srl %g4, 16, %g5 |
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| 107 | and %g5, 0xff, %g5 |
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| 108 | cmp %g5, %o1 |
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| 109 | be 3f |
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| 110 | srl %g4, 8, %g5 |
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| 111 | and %g5, 0xff, %g5 |
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| 112 | cmp %g5, %o1 |
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| 113 | be 2f |
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| 114 | and %g4, 0xff, %g5 |
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| 115 | cmp %g5, %o1 |
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| 116 | be 1f |
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| 117 | cmp %o2, 0 |
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| 118 | bne,a 6b |
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| 119 | ld [%o0], %g4 |
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| 120 | b 1b |
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| 121 | cmp %g1, 0 |
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| 122 | 1: retl |
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| 123 | sub %o0, 1, %o0 |
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| 124 | 2: retl |
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| 125 | sub %o0, 2, %o0 |
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| 126 | 3: retl |
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| 127 | sub %o0, 3, %o0 |
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| 128 | 4: retl |
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| 129 | sub %o0, 4, %o0 |
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| 130 | END(__memchr) |
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| 131 | |
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| 132 | weak_alias (__memchr, memchr) |
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| 133 | libc_hidden_builtin_def (memchr) |
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| 134 | |
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