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847b055c | 1 | /* Search a character in a block of memory. For IBM S390 |
85dd1003 | 2 | Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc. |
41bdb6e2 | 3 | This file is part of the GNU C Library. |
847b055c AJ |
4 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
5 | ||
6 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
7 | modify it under the terms of the GNU Lesser General Public |
8 | License as published by the Free Software Foundation; either | |
9 | version 2.1 of the License, or (at your option) any later version. | |
847b055c AJ |
10 | |
11 | The GNU C Library is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
847b055c | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
847b055c AJ |
19 | |
20 | /* | |
21 | * R2 = address to memory area | |
22 | * R3 = character to find | |
23 | * R4 = number of bytes to search | |
24 | */ | |
25 | ||
26 | #include "sysdep.h" | |
27 | #include "asm-syntax.h" | |
28 | ||
29 | .text | |
30 | ENTRY(memchr) | |
31 | lhi %r0,0xff | |
32 | nr %r0,%r3 | |
33 | lr %r1,%r2 | |
34 | la %r2,0(%r4,%r1) | |
35 | 0: srst %r2,%r1 | |
36 | jo 0b | |
37 | brc 13,1f | |
38 | slr %r2,%r2 | |
39 | 1: br %r14 | |
40 | END(memchr) | |
85dd1003 | 41 | libc_hidden_builtin_def (memchr) |