mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 08:40:07 +00:00
4372980f58
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 c6bfe5c4d7 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.
46 lines
1.6 KiB
C
46 lines
1.6 KiB
C
/* 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 *
|
|
__rawmemchr (const void *s, int c)
|
|
{
|
|
/* Get an aligned pointer. */
|
|
const uintptr_t s_int = (uintptr_t) s;
|
|
const uint32_t *p = (const uint32_t *) (s_int & -4);
|
|
|
|
/* Create four copies of the byte for which we are looking. */
|
|
const uint32_t 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. */
|
|
const uint32_t before_mask = (1 << (s_int << 3)) - 1;
|
|
uint32_t v = (*p | before_mask) ^ (goal & before_mask);
|
|
|
|
uint32_t bits;
|
|
while ((bits = __insn_seqb (v, goal)) == 0)
|
|
v = *++p;
|
|
|
|
return ((char *) p) + (__insn_ctz (bits) >> 3);
|
|
}
|
|
libc_hidden_def (__rawmemchr)
|
|
weak_alias (__rawmemchr, rawmemchr)
|