1 /* Optimized version of the standard strncmp() function.
2 This file is part of the GNU C Library.
3 Copyright (C) 2000-2022 Free Software Foundation, Inc.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
19 /* Return: the result of the comparison
26 Unlike memcmp(), this function is optimized for mismatches within the
27 first few characters. */
41 alloc r2 = ar.pfs, 3, 0, 0, 0
43 cmp.eq p6, p0 = r0, r0 // set p6
44 cmp.eq p7, p0 = n, r0 // return immediately if n == 0
45 (p7) br.cond.spnt .restore_and_exit ;;
51 cmp.ne.and p6, p0 = val1, r0
52 cmp.ne.and p6, p0 = val2, r0
53 cmp.ne.and p6, p0 = n, r0
54 cmp.eq.and p6, p0 = val1, val2
55 (p6) br.cond.sptk .loop
60 libc_hidden_builtin_def (strncmp)