blob: 4da72fa10517c23038dfdd53a74ff85cf1f88921 [file] [log] [blame]
lh9ed821d2023-04-07 01:36:19 -07001/* Optimized version of the standard strcmp() function.
2 This file is part of the GNU C Library.
3 Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
4 Contributed by Dan Pop <Dan.Pop@cern.ch>.
5
6 The GNU C Library is free software; you can redistribute it and/or
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.
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
14 Lesser General Public License for more details.
15
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. */
20
21/* Return: the result of the comparison
22
23 Inputs:
24 in0: s1
25 in1: s2
26
27 Unlike memcmp(), this function is optimized for mismatches within the
28 first few characters. */
29
30#include "sysdep.h"
31#undef ret
32
33#define s1 in0
34#define s2 in1
35
36#define val1 r15
37#define val2 r16
38
39
40ENTRY(strcmp)
41 alloc r2 = ar.pfs, 2, 0, 0, 0
42.loop:
43 ld1 val1 = [s1], 1
44 ld1 val2 = [s2], 1
45 cmp.eq p6, p0 = r0, r0 /* set p6 */
46 ;;
47 cmp.ne.and p6, p0 = val1, r0
48 cmp.ne.and p6, p0 = val2, r0
49 cmp.eq.and p6, p0 = val1, val2
50(p6) br.cond.sptk .loop
51 sub ret0 = val1, val2
52 br.ret.sptk.many b0
53END(strcmp)
54libc_hidden_def (strcmp)
55
56#ifndef __UCLIBC_HAS_LOCALE__
57strong_alias(strcmp,strcoll)
58libc_hidden_def(strcoll)
59#endif