diff options
Diffstat (limited to 'ports/sysdeps/tile/tilegx/memchr.c')
-rw-r--r-- | ports/sysdeps/tile/tilegx/memchr.c | 73 |
1 files changed, 0 insertions, 73 deletions
diff --git a/ports/sysdeps/tile/tilegx/memchr.c b/ports/sysdeps/tile/tilegx/memchr.c deleted file mode 100644 index ee17d9a..0000000 --- a/ports/sysdeps/tile/tilegx/memchr.c +++ /dev/null @@ -1,73 +0,0 @@ -/* Copyright (C) 2011-2014 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. - - 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 <string.h> -#include <stdint.h> -#include "string-endian.h" - -void * -__memchr (const void *s, int c, size_t n) -{ - const uint64_t *last_word_ptr; - const uint64_t *p; - const char *last_byte_ptr; - uintptr_t s_int; - uint64_t goal, before_mask, v, bits; - char *ret; - - if (__builtin_expect (n == 0, 0)) - { - /* Don't dereference any memory if the array is empty. */ - return NULL; - } - - /* Get an aligned pointer. */ - s_int = (uintptr_t) s; - p = (const uint64_t *) (s_int & -8); - - /* Create eight copies of the byte for which we are looking. */ - goal = copy_byte(c); - - /* Read the first word, but munge it so that bytes before the array - will not match goal. */ - before_mask = MASK (s_int); - v = (*p | before_mask) ^ (goal & before_mask); - - /* Compute the address of the last byte. */ - last_byte_ptr = (const char *) s + n - 1; - - /* Compute the address of the word containing the last byte. */ - last_word_ptr = (const uint64_t *) ((uintptr_t) last_byte_ptr & -8); - - while ((bits = __insn_v1cmpeq (v, goal)) == 0) - { - if (__builtin_expect (p == last_word_ptr, 0)) - { - /* We already read the last word in the array, so give up. */ - return NULL; - } - v = *++p; - } - - /* We found a match, but it might be in a byte past the end - of the array. */ - ret = ((char *) p) + (CFZ (bits) >> 3); - return (ret <= last_byte_ptr) ? ret : NULL; -} -weak_alias (__memchr, memchr) -libc_hidden_builtin_def (memchr) |