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author | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 10:54:47 -0500 |
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committer | Chris Metcalf <cmetcalf@tilera.com> | 2014-02-10 11:04:39 -0500 |
commit | 4372980f5881e7d537a52e3c49588ce116088061 (patch) | |
tree | 138fbc88313c8cb0cabee393e0c08afd67dac6f1 /ports/sysdeps/tile/tilepro/memchr.c | |
parent | a1ffb40e32741f992c743e7b16c061fefa3747ac (diff) | |
download | glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.gz glibc-4372980f5881e7d537a52e3c49588ce116088061.tar.xz glibc-4372980f5881e7d537a52e3c49588ce116088061.zip |
Move tilegx, tilepro, and linux-generic from ports to libc.
I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy, along with the linux-generic ports infrastructure. Beyond the README update, the move was just git mv ports/sysdeps/tile sysdeps/tile git mv ports/sysdeps/unix/sysv/linux/tile \ sysdeps/unix/sysv/linux/tile git mv ports/sysdeps/unix/sysv/linux/generic \ sysdeps/unix/sysv/linux/generic I updated the relevant ChangeLogs along the lines of the ARM move in commit c6bfe5c4d75 and tested the 64-bit tilegx build to confirm that there were no changes in "objdump -dr" output in the shared objects.
Diffstat (limited to 'ports/sysdeps/tile/tilepro/memchr.c')
-rw-r--r-- | ports/sysdeps/tile/tilepro/memchr.c | 72 |
1 files changed, 0 insertions, 72 deletions
diff --git a/ports/sysdeps/tile/tilepro/memchr.c b/ports/sysdeps/tile/tilepro/memchr.c deleted file mode 100644 index 87e64d2216..0000000000 --- a/ports/sysdeps/tile/tilepro/memchr.c +++ /dev/null @@ -1,72 +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> - -void * -__memchr (const void *s, int c, size_t n) -{ - const uint32_t *last_word_ptr; - const uint32_t *p; - const char *last_byte_ptr; - uintptr_t s_int; - uint32_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 uint32_t *) (s_int & -4); - - /* Create four copies of the byte for which we are looking. */ - goal = 0x01010101 * (uint8_t) c; - - /* Read the first word, but munge it so that bytes before the array - will not match goal. Note that this shift count expression works - because we know shift counts are taken mod 32. */ - before_mask = (1 << (s_int << 3)) - 1; - 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 uint32_t *) ((uintptr_t) last_byte_ptr & -4); - - while ((bits = __insn_seqb (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) + (__insn_ctz (bits) >> 3); - return (ret <= last_byte_ptr) ? ret : NULL; -} -weak_alias (__memchr, memchr) -libc_hidden_builtin_def (memchr) |