aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/s390/s390-32/memchr.S
blob: 81cefefd558d532166577e27120ed312acf2c143 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
/* Search a character in a block of memory.  For IBM S390
   Copyright (C) 2000, 2001 Free Software Foundation, Inc.
   Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com).

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

/*
 * R2 = address to memory area
 * R3 = character to find
 * R4 = number of bytes to search
 */

#include "sysdep.h"
#include "asm-syntax.h"

	.text
ENTRY(memchr)
	lhi   %r0,0xff
	nr    %r0,%r3
	lr    %r1,%r2
	la    %r2,0(%r4,%r1)
0:      srst  %r2,%r1
	jo    0b
	brc   13,1f
	slr   %r2,%r2
1:      br    %r14
END(memchr)