mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-09 23:00:07 +00:00
662c2cc4e9
This allows an architecture to set explicit loop unrolling. Checked on aarch64-linux-gnu. * wcsmbs/wcsrchr.c (WCSRCHR): Use loop_unroll.h to parametrize the loop unroll.
48 lines
1.3 KiB
C
48 lines
1.3 KiB
C
/* Copyright (C) 1995-2019 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>
|
|
|
|
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 <wchar.h>
|
|
#include <loop_unroll.h>
|
|
|
|
#ifndef WCSRCHR
|
|
# define WCSRCHR wcsrchr
|
|
#endif
|
|
|
|
/* Find the last occurrence of WC in WCS. */
|
|
wchar_t *
|
|
WCSRCHR (const wchar_t *wcs, const wchar_t wc)
|
|
{
|
|
wchar_t *retval = NULL;
|
|
|
|
#define ITERATION(index) \
|
|
({ \
|
|
if (*wcs == wc) \
|
|
retval = (wchar_t*) wcs; \
|
|
*wcs++ != L'\0'; \
|
|
})
|
|
|
|
#ifndef UNROLL_NTIMES
|
|
# define UNROLL_NTIMES 1
|
|
#endif
|
|
|
|
while (1)
|
|
UNROLL_REPEAT (UNROLL_NTIMES, ITERATION);
|
|
|
|
return retval;
|
|
}
|