Rather than using a C implementation of memset, directly call memset, which

typically has a much faster optimized implementation.

diff --git a/ChangeLog b/ChangeLog
index 3b5caa5..6eb5290 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2015-02-27  Wilco Dijkstra  wdijkstr@arm.com
+
+       * string/bzero.c (__bzero): Call memset for performance.
+
 2015-02-27  John David Anglin  <dave.anglin@bell.net>
 
        * sysdeps/unix/sysv/linux/hppa/bits/fcntl.h (__O_SYNC): Change

diff --git a/string/bzero.c b/string/bzero.c
index a0e738e..43e2b38 100644 (file)
--- a/string/bzero.c
+++ b/string/bzero.c
@@ -17,66 +17,13 @@
    <http://www.gnu.org/licenses/>.  */
 
 #include <string.h>
-#include <memcopy.h>
 
 #undef __bzero
 
 /* Set N bytes of S to 0.  */
 void
-__bzero (s, len)
-     void *s;
-     size_t len;
+__bzero (void *s, size_t len)
 {
-  long int dstp = (long int) s;
-  const op_t zero = 0;
-
-  if (len >= 8)
-    {
-      size_t xlen;
-
-      /* There are at least some bytes to zero.  No need to test
-        for LEN == 0 in this alignment loop.  */
-      while (dstp % OPSIZ != 0)
-       {
-         ((byte *) dstp)[0] = 0;
-         dstp += 1;
-         len -= 1;
-       }
-
-      /* Write 8 op_t per iteration until less than 8 op_t remain.  */
-      xlen = len / (OPSIZ * 8);
-      while (xlen != 0)
-       {
-         ((op_t *) dstp)[0] = zero;
-         ((op_t *) dstp)[1] = zero;
-         ((op_t *) dstp)[2] = zero;
-         ((op_t *) dstp)[3] = zero;
-         ((op_t *) dstp)[4] = zero;
-         ((op_t *) dstp)[5] = zero;
-         ((op_t *) dstp)[6] = zero;
-         ((op_t *) dstp)[7] = zero;
-         dstp += 8 * OPSIZ;
-         xlen -= 1;
-       }
-      len %= OPSIZ * 8;
-
-      /* Write 1 op_t per iteration until less than op_t remain.  */
-      xlen = len / OPSIZ;
-      while (xlen != 0)
-       {
-         ((op_t *) dstp)[0] = zero;
-         dstp += OPSIZ;
-         xlen -= 1;
-       }
-      len %= OPSIZ;
-    }
-
-  /* Write the last few bytes.  */
-  while (len != 0)
-    {
-      ((byte *) dstp)[0] = 0;
-      dstp += 1;
-      len -= 1;
-    }
+  memset (s, '\0', len);
 }
 weak_alias (__bzero, bzero)