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authorAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-03-20 11:24:52 -0500
committerAdhemerval Zanella <azanella@linux.vnet.ibm.com>2014-03-20 11:24:52 -0500
commit6eaf95cbfa0031ea267682dc2c9c17ed3e3dc167 (patch)
tree93cf4f0efb9ce1654e9f298b6342953a7935965a /string
parentae3a5dff0f4135cc57ddddf3c19ed5be80285b54 (diff)
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PowerPC: optimized strcspn for PPC64/POWER7
This patch add a optimized strcspn for POWER7 by using a different algorithm than default implementation: it constructs a table based on the 'accept' argument and use this table to check for any occurance on the input string. The idea is similar as x86_64 uses. For PowerPC some tunings were added, such as unroll loops and align stack memory to table to 16 bytes (so VSX clean can ran without alignment issues).
Diffstat (limited to 'string')
-rw-r--r--string/strcspn.c21
1 files changed, 6 insertions, 15 deletions
diff --git a/string/strcspn.c b/string/strcspn.c
index 7c39f79..4316205 100644
--- a/string/strcspn.c
+++ b/string/strcspn.c
@@ -15,27 +15,18 @@
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
-#if HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#if defined _LIBC || HAVE_STRING_H
-# include <string.h>
-#else
-# include <strings.h>
-# ifndef strchr
-# define strchr index
-# endif
-#endif
+#include <string.h>
#undef strcspn
+#ifndef STRCSPN
+# define STRCSPN strcspn
+#endif
+
/* Return the length of the maximum initial segment of S
which contains no characters from REJECT. */
size_t
-strcspn (s, reject)
- const char *s;
- const char *reject;
+STRCSPN (const char *s, const char *reject)
{
size_t count = 0;