1 /* Optimized version of the standard strncmp() function.
2 This file is part of the GNU C Library.
3 Copyright (C) 2000-2014 Free Software Foundation, Inc.
4 Contributed by Dan Pop <Dan.Pop@cern.ch>.
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.
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.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
20 /* Return: the result of the comparison
27 Unlike memcmp(), this function is optimized for mismatches within the
28 first few characters. */
42 alloc r2 = ar.pfs, 3, 0, 0, 0
44 cmp.eq p6, p0 = r0, r0 // set p6
45 cmp.eq p7, p0 = n, r0 // return immediately if n == 0
46 (p7) br.cond.spnt .restore_and_exit ;;
52 cmp.ne.and p6, p0 = val1, r0
53 cmp.ne.and p6, p0 = val2, r0
54 cmp.ne.and p6, p0 = n, r0
55 cmp.eq.and p6, p0 = val1, val2
56 (p6) br.cond.sptk .loop
61 libc_hidden_builtin_def (strncmp)