projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| ae6b8730 RH |
1 | /* Determine the length of a string. |
| 2 | For SPARC v7. | |
| d4697bc9 | 3 | Copyright (C) 1996-2014 Free Software Foundation, Inc. |
| 41bdb6e2 | 4 | This file is part of the GNU C Library. |
| 462a5227 DM |
5 | Contributed by Jakub Jelinek <jj@ultra.linux.cz> and |
| 6 | David S. Miller <davem@davemloft.net>. | |
| ae6b8730 RH |
7 | |
| 8 | The GNU C Library is free software; you can redistribute it and/or | |
| 41bdb6e2 AJ |
9 | modify it under the terms of the GNU Lesser General Public |
| 10 | License as published by the Free Software Foundation; either | |
| 11 | version 2.1 of the License, or (at your option) any later version. | |
| ae6b8730 RH |
12 | |
| 13 | The GNU C Library is distributed in the hope that it will be useful, | |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 41bdb6e2 | 16 | Lesser General Public License for more details. |
| ae6b8730 | 17 | |
| 41bdb6e2 | 18 | You should have received a copy of the GNU Lesser General Public |
| 59ba27a6 PE |
19 | License along with the GNU C Library; if not, see |
| 20 | <http://www.gnu.org/licenses/>. */ | |
| ae6b8730 RH |
21 | |
| 22 | #include <sysdep.h> | |
| 23 | ||
| ae6b8730 RH |
24 | .text |
| 25 | .align 4 | |
| 043cee37 RM |
26 | |
| 27 | ENTRY(strlen) | |
| 462a5227 DM |
28 | mov %o0, %o1 |
| 29 | andn %o0, 0x3, %o0 | |
| 30 | ||
| 31 | ld [%o0], %o5 | |
| 32 | and %o1, 0x3, %g1 | |
| 33 | mov -1, %g5 | |
| 34 | ||
| 35 | sethi %hi(0x01010101), %o2 | |
| 36 | sll %g1, 3, %g1 | |
| 37 | ||
| 38 | or %o2, %lo(0x01010101), %o2 | |
| 39 | srl %g5, %g1, %g2 | |
| 40 | ||
| 41 | orn %o5, %g2, %o5 | |
| 42 | sll %o2, 7, %o3 | |
| 43 | 10: add %o0, 4, %o0 | |
| 44 | ||
| 45 | andn %o3, %o5, %g1 | |
| 46 | sub %o5, %o2, %g2 | |
| 47 | ||
| 48 | andcc %g1, %g2, %g0 | |
| 49 | be,a 10b | |
| 50 | ld [%o0], %o5 | |
| 51 | ||
| 52 | srl %o5, 24, %g1 | |
| 53 | ||
| 54 | andcc %g1, 0xff, %g0 | |
| 55 | be 90f | |
| 56 | sub %o0, 4, %o0 | |
| 57 | ||
| 58 | srl %o5, 16, %g2 | |
| 59 | ||
| 60 | andcc %g2, 0xff, %g0 | |
| 61 | be 90f | |
| 62 | add %o0, 1, %o0 | |
| 63 | ||
| 64 | srl %o5, 8, %g1 | |
| 65 | ||
| 66 | andcc %g1, 0xff, %g0 | |
| 67 | be 90f | |
| 68 | add %o0, 1, %o0 | |
| 69 | ||
| 70 | add %o0, 1, %o0 | |
| 71 | ||
| 72 | 90: retl | |
| 73 | sub %o0, %o1, %o0 | |
| ae6b8730 | 74 | END(strlen) |
| 85dd1003 | 75 | libc_hidden_builtin_def (strlen) |