diff options
Diffstat (limited to 'sysdeps/s390/memchr.S')
| -rw-r--r-- | sysdeps/s390/memchr.S | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/sysdeps/s390/memchr.S b/sysdeps/s390/memchr.S new file mode 100644 index 0000000000..72b4682745 --- /dev/null +++ b/sysdeps/s390/memchr.S @@ -0,0 +1,40 @@ +/* Search a character in a block of memory. For IBM S390 + Copyright (C) 2000 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) |