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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-03-12 10:05:49 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2019-04-04 16:01:14 +0700
commit662c2cc4e9f00ffc789b636db18617538b4d9051 (patch)
tree5874484f3480801c376bfdc2c1a1bf8e13cfe77e /wcsmbs
parentpowerpc: Use generic wcschr optimization (diff)
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wcsmbs: Use loop_unroll on wcsrchr
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.
Diffstat (limited to 'wcsmbs')
-rw-r--r--wcsmbs/wcsrchr.c22
1 files changed, 16 insertions, 6 deletions
diff --git a/wcsmbs/wcsrchr.c b/wcsmbs/wcsrchr.c
index 0d4bad0704..7679534180 100644
--- a/wcsmbs/wcsrchr.c
+++ b/wcsmbs/wcsrchr.c
@@ -17,6 +17,7 @@
<http://www.gnu.org/licenses/>. */
#include <wchar.h>
+#include <loop_unroll.h>
#ifndef WCSRCHR
# define WCSRCHR wcsrchr
@@ -26,12 +27,21 @@
wchar_t *
WCSRCHR (const wchar_t *wcs, const wchar_t wc)
{
- const wchar_t *retval = NULL;
+ wchar_t *retval = NULL;
- do
- if (*wcs == wc)
- retval = wcs;
- while (*wcs++ != L'\0');
+#define ITERATION(index) \
+ ({ \
+ if (*wcs == wc) \
+ 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;
}