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mirror of git://sourceware.org/git/glibc.git synced 2024-12-15 04:20:28 +08:00
glibc/sysdeps/ia64/strcmp.S
Mike Frysinger 75efb01851 ia64: update FSF license address to URL
Processed with a simple sed script:

find `find sysdeps/ -name ia64` -type f -exec sed -i \
	-e '/Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA/d' \
	-e 's:License along with the GNU C Library; if not, write to the Free:License along with the GNU C Library; if not, see:' \
	-e 's|02111-1307 USA.|<http://www.gnu.org/licenses/>.|' {} +

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-04-22 23:26:51 -04:00

54 lines
1.5 KiB
ArmAsm

/* Optimized version of the standard strcmp() function.
This file is part of the GNU C Library.
Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
Contributed by Dan Pop <Dan.Pop@cern.ch>.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
/* Return: the result of the comparison
Inputs:
in0: s1
in1: s2
Unlike memcmp(), this function is optimized for mismatches within the
first few characters. */
#include <sysdep.h>
#undef ret
#define s1 in0
#define s2 in1
#define val1 r15
#define val2 r16
ENTRY(strcmp)
alloc r2 = ar.pfs, 2, 0, 0, 0
.loop:
ld1 val1 = [s1], 1
ld1 val2 = [s2], 1
cmp.eq p6, p0 = r0, r0 // set p6
;;
cmp.ne.and p6, p0 = val1, r0
cmp.ne.and p6, p0 = val2, r0
cmp.eq.and p6, p0 = val1, val2
(p6) br.cond.sptk .loop
sub ret0 = val1, val2
br.ret.sptk.many b0
END(strcmp)
libc_hidden_builtin_def (strcmp)