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wcsmbs: Use loop_unroll on wcschr

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This allows an architecture to set explicit loop unrolling.

Checked on aarch64-linux-gnu.

	* wcsmbs/wcschr.c (WCSCHR): Use loop_unroll.h to parametrize
	the loop unroll.
This commit is contained in:
Adhemerval Zanella 2019-03-12 09:33:03 -03:00
parent 447a1306c3
commit 7ba0100c6a
2 changed files with 20 additions and 5 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2019-04-04 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* wcsmbs/wcschr.c (WCSCHR): Use loop_unroll.h to parametrize
the loop unroll.
* sysdeps/powerpc/Makefile [$(subdir) == wcsmbs] (CFLAGS-wcscpy.c):
New rule.
* sysdeps/powerpc/power6/wcscpy.c: Remove file.

22
wcsmbs/wcschr.c
View File

@ -16,6 +16,7 @@
<http://www.gnu.org/licenses/>. */
#include <wchar.h>
#include <loop_unroll.h>
#ifndef WCSCHR
# define WCSCHR __wcschr
@ -25,12 +26,23 @@
wchar_t *
WCSCHR (const wchar_t *wcs, const wchar_t wc)
{
do
if (*wcs == wc)
return (wchar_t *) wcs;
while (*wcs++ != L'\0');
wchar_t *dest = NULL;
return NULL;
#define ITERATION(index) \
({ \
if (*wcs == wc) \
dest = (wchar_t*) wcs; \
dest == NULL && *wcs++ != L'\0'; \
})
#ifndef UNROLL_NTIMES
# define UNROLL_NTIMES 1
#endif
while (1)
UNROLL_REPEAT (UNROLL_NTIMES, ITERATION);
return dest;
}
libc_hidden_def (__wcschr)
weak_alias (__wcschr, wcschr)