1 /* Optimized strlen implementation for PowerPC476.
2 Copyright (C) 2010-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
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/>. */
24 r3:source address and return length of string
27 Implementation description
28 Load 2 words at a time and count bytes, if we find null we subtract one from
29 the count and return the count value. We need to subtract one because
30 we don't count the null character as a byte. */
36 beq L(byte_count_loop)
75 libc_hidden_builtin_def (strlen)