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wcsmbs: Use loop_unroll on wcsrchr

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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.
This commit is contained in:
Adhemerval Zanella 2019-03-12 10:05:49 -03:00
parent 421e3005ca
commit 662c2cc4e9
2 changed files with 19 additions and 6 deletions
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3
ChangeLog
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@ -1,5 +1,8 @@
2019-04-04 Adhemerval Zanella <adhemerval.zanella@linaro.org> 2019-04-04 Adhemerval Zanella <adhemerval.zanella@linaro.org>
* wcsmbs/wcsrchr.c (WCSRCHR): Use loop_unroll.h to parametrize
the loop unroll.
* sysdeps/powerpc/Makefile [$(subdir) == wcsmbs] (CFLAGS-wcschr.c): * sysdeps/powerpc/Makefile [$(subdir) == wcsmbs] (CFLAGS-wcschr.c):
New rule. New rule.
* sysdeps/powerpc/power6/wcschr.c: Remove file. * sysdeps/powerpc/power6/wcschr.c: Remove file.

22
wcsmbs/wcsrchr.c
View File

@ -17,6 +17,7 @@
<http://www.gnu.org/licenses/>. */ <http://www.gnu.org/licenses/>. */
#include <wchar.h> #include <wchar.h>
#include <loop_unroll.h>
#ifndef WCSRCHR #ifndef WCSRCHR
# define WCSRCHR wcsrchr # define WCSRCHR wcsrchr
@ -26,12 +27,21 @@
wchar_t * wchar_t *
WCSRCHR (const wchar_t *wcs, const wchar_t wc) WCSRCHR (const wchar_t *wcs, const wchar_t wc)
{ {
const wchar_t *retval = NULL; wchar_t *retval = NULL;
do #define ITERATION(index) \
if (*wcs == wc) ({ \
retval = wcs; if (*wcs == wc) \
while (*wcs++ != L'\0'); retval = (wchar_t*) wcs; \
*wcs++ != L'\0'; \
})
return (wchar_t *) retval; #ifndef UNROLL_NTIMES
# define UNROLL_NTIMES 1
#endif
while (1)
UNROLL_REPEAT (UNROLL_NTIMES, ITERATION);
return retval;
} }