glibc/sysdeps/ia64/strcmp.S
Ulrich Drepper 8ee3551551 Update.
2001-04-11  David Mosberger  <davidm@hpl.hp.com>

	* sysdeps/ia64/htonl.S: Drop superfluous "alloc".
	* sysdeps/ia64/htons.S: Likewise.

	* sysdeps/ia64/memset.S: Add unwind directives.
	* sysdeps/ia64/strncpy.S: Likewise.
	* sysdeps/ia64/strcat.S: Likewise.

	* sysdeps/ia64/memccpy.S: Add unwind directives.  Drop superfluous
	restore of ar.pfs.
	* sysdeps/ia64/strchr.S: Likewise.
	* sysdeps/ia64/memmove.S: Likewise.
	* sysdeps/ia64/memcpy.S: Likewise.
	* sysdeps/ia64/memcmp.S: Likewise.
	* sysdeps/ia64/memchr.S: Likewise.
	* sysdeps/ia64/strcmp.S: Likewise.
	* sysdeps/ia64/strlen.S: Likewise.
	* sysdeps/ia64/strcpy.S: Likewise.
	* sysdeps/ia64/strncmp.S: Likewise.
2001-04-11 19:57:49 +00:00

54 lines
1.6 KiB
ArmAsm

/* Optimized version of the standard strcmp() function.
This file is part of the GNU C Library.
Copyright (C) 2000, 2001 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 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. */
/* 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)