| /* rawmemchr - find a character in a memory zone |
| |
| Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <sysdep.h> |
| |
| /* Special case rawmemchr (s, 0) as strlen, otherwise tailcall memchr. |
| Call strlen without setting up a full frame - it preserves x14/x15. |
| */ |
| |
| ENTRY (__rawmemchr) |
| cbz w1, L(do_strlen) |
| mov x2, -1 |
| b __memchr |
| |
| L(do_strlen): |
| mov x15, x30 |
| cfi_return_column (x15) |
| mov x14, x0 |
| bl __strlen |
| add x0, x14, x0 |
| ret x15 |
| |
| END (__rawmemchr) |
| weak_alias (__rawmemchr, rawmemchr) |
| libc_hidden_builtin_def (__rawmemchr) |
