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ffeac417 | 1 | /* Search a character in a block of memory. 64 bit S/390 version. |
85dd1003 | 2 | Copyright (C) 2001, 2003 Free Software Foundation, Inc. |
847b055c | 3 | Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). |
ffeac417 | 4 | This file is part of the GNU C Library. |
847b055c AJ |
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 AJ |
16 | You should have received a copy of the GNU Lesser General Public |
17 | License along with the GNU C Library; if not, write to the Free | |
18 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
19 | 02111-1307 USA. */ | |
847b055c | 20 | |
ffeac417 UD |
21 | /* INPUT PARAMETERS |
22 | %r2 = address to memory area | |
23 | %r3 = character to find | |
24 | %r4 = number of bytes to search. */ | |
847b055c AJ |
25 | |
26 | #include "sysdep.h" | |
27 | #include "asm-syntax.h" | |
28 | ||
29 | .text | |
30 | ENTRY(memchr) | |
ffeac417 UD |
31 | lghi %r0,0xff |
32 | ngr %r0,%r3 | |
33 | lgr %r1,%r2 | |
847b055c | 34 | la %r2,0(%r4,%r1) |
ffeac417 | 35 | 0: srst %r2,%r1 |
847b055c AJ |
36 | jo 0b |
37 | brc 13,1f | |
ffeac417 UD |
38 | slgr %r2,%r2 |
39 | 1: br %r14 | |
847b055c | 40 | END(memchr) |
85dd1003 | 41 | libc_hidden_builtin_def (memchr) |