mirror of
https://sourceware.org/git/glibc.git
synced 2025-11-03 20:53:13 +03:00
15d0da8cb3
Initially based on the versions found in wcsmbs/* ; these files have been changed by hand unrolling, and adding some additional variables to allow some read-ahead to occur, which then relieves some of the wait-for-increment/wait-for-load/wait-for-compare-results pressure that was slowing down every iteration through the while-loop. For 64-bit Power7, These changes give an approx 20% throughput boost for the wcschr and wcsrchr functions; and approx 40% boost for the wcscpy function. 32-bit improvements appear to be slightly better with ~ %30 and ~ %45 respectively. Results for Power6 closely match those for power7.
89 lines
2.1 KiB
C
89 lines
2.1 KiB
C
/* wcschr.c - Wide Character Search for powerpc32/power6.
|
|
Copyright (C) 2012 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; see the file COPYING.LIB. If
|
|
not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include <wchar.h>
|
|
|
|
|
|
/* Find the first occurrence of WC in WCS. */
|
|
wchar_t *
|
|
wcschr (wcs, wc)
|
|
register const wchar_t *wcs;
|
|
register const wchar_t wc;
|
|
{
|
|
register const wchar_t *wcs2 = wcs + 1;
|
|
|
|
if (*wcs == wc)
|
|
return (wchar_t *) wcs;
|
|
if (*wcs == L'\0')
|
|
return NULL;
|
|
|
|
do
|
|
{
|
|
wcs += 2;
|
|
|
|
if (*wcs2 == wc)
|
|
return (wchar_t *) wcs2;
|
|
if (*wcs2 == L'\0')
|
|
return NULL;
|
|
wcs2 += 2;
|
|
|
|
if (*wcs == wc)
|
|
return (wchar_t *) wcs;
|
|
if (*wcs == L'\0')
|
|
return NULL;
|
|
wcs += 2;
|
|
|
|
if (*wcs2 == wc)
|
|
return (wchar_t *) wcs2;
|
|
if (*wcs2 == L'\0')
|
|
return NULL;
|
|
wcs2 += 2;
|
|
|
|
if (*wcs == wc)
|
|
return (wchar_t *) wcs;
|
|
if (*wcs == L'\0')
|
|
return NULL;
|
|
wcs += 2;
|
|
|
|
if (*wcs2 == wc)
|
|
return (wchar_t *) wcs2;
|
|
if (*wcs2 == L'\0')
|
|
return NULL;
|
|
wcs2 += 2;
|
|
|
|
if (*wcs == wc)
|
|
return (wchar_t *) wcs;
|
|
if (*wcs == L'\0')
|
|
return NULL;
|
|
wcs += 2;
|
|
|
|
if (*wcs2 == wc)
|
|
return (wchar_t *) wcs2;
|
|
if (*wcs2 == L'\0')
|
|
return NULL;
|
|
wcs2 += 2;
|
|
|
|
if (*wcs == wc)
|
|
return (wchar_t *) wcs;
|
|
}
|
|
while (*wcs != L'\0');
|
|
|
|
return NULL;
|
|
}
|
|
libc_hidden_def (wcschr)
|