benchtests: Switch string benchmarks to use bench-timing.h.

Switch the string benchmarks to using bench-timing.h instead
of hp-timing.h directly. This allows the string benchmarks to
be run usefully on architectures such as ARM that do not have
support for hp-timing.h.

In order to do this the tests have been changed from timing each
individual call and picking the lowest execution time recorded to
timing a number of calls and taking the mean execution time.

ChangeLog:

2013-09-04   Will Newton  <will.newton@linaro.org>

	* benchtests/bench-timing.h (TIMING_PRINT_MEAN): New macro.
	* benchtests/bench-string.h: Include bench-timing.h instead
	of including hp-timing.h directly. (INNER_LOOP_ITERS): New
	define. (HP_TIMING_BEST): Delete macro. (test_init): Remove
	call to HP_TIMING_DIFF_INIT.
	* benchtests/bench-memccpy.c: Use bench-timing.h macros
	instead of hp-timing.h macros.
	* benchtests/bench-memchr.c: Likewise.
	* benchtests/bench-memcmp.c: Likewise.
	* benchtests/bench-memcpy.c: Likewise.
	* benchtests/bench-memmem.c: Likewise.
	* benchtests/bench-memmove.c: Likewise.
	* benchtests/bench-memset.c: Likewise.
	* benchtests/bench-rawmemchr.c: Likewise.
	* benchtests/bench-strcasecmp.c: Likewise.
	* benchtests/bench-strcasestr.c: Likewise.
	* benchtests/bench-strcat.c: Likewise.
	* benchtests/bench-strchr.c: Likewise.
	* benchtests/bench-strcmp.c: Likewise.
	* benchtests/bench-strcpy.c: Likewise.
	* benchtests/bench-strcpy_chk.c: Likewise.
	* benchtests/bench-strlen.c: Likewise.
	* benchtests/bench-strncasecmp.c: Likewise.
	* benchtests/bench-strncat.c: Likewise.
	* benchtests/bench-strncmp.c: Likewise.
	* benchtests/bench-strncpy.c: Likewise.
	* benchtests/bench-strnlen.c: Likewise.
	* benchtests/bench-strpbrk.c: Likewise.
	* benchtests/bench-strrchr.c: Likewise.
	* benchtests/bench-strspn.c: Likewise.
	* benchtests/bench-strstr.c: Likewise.

1 files changed, 12 insertions, 20 deletions

diff --git a/benchtests/bench-memset.c b/benchtests/bench-memset.c
index ea29cf37fc..e45807c0ee 100644
--- a/benchtests/bench-memset.c
+++ b/benchtests/bench-memset.c
@@ -75,6 +75,8 @@ simple_memset (char *s, int c, size_t n)
 static void
 do_one_test (impl_t *impl, char *s, int c __attribute ((unused)), size_t n)
 {
+  size_t i, iters = INNER_LOOP_ITERS;
+  timing_t start, stop, cur;
   char tstbuf[n];
 #ifdef TEST_BZERO
   simple_bzero (tstbuf, n);
@@ -92,28 +94,20 @@ do_one_test (impl_t *impl, char *s, int c __attribute ((unused)), size_t n)
       return;
     }
 
-  if (HP_TIMING_AVAIL)
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
     {
-      hp_timing_t start __attribute ((unused));
-      hp_timing_t stop __attribute ((unused));
-      hp_timing_t best_time = ~ (hp_timing_t) 0;
-      size_t i;
-
-      for (i = 0; i < 32; ++i)
-	{
-	  HP_TIMING_NOW (start);
 #ifdef TEST_BZERO
-	  CALL (impl, s, n);
+      CALL (impl, s, n);
 #else
-	  CALL (impl, s, c, n);
+      CALL (impl, s, c, n);
 #endif
+    }
+  TIMING_NOW (stop);
 
-	  HP_TIMING_NOW (stop);
-	  HP_TIMING_BEST (best_time, start, stop);
-	}
+  TIMING_DIFF (cur, start, stop);
 
-      printf ("\t%zd", (size_t) best_time);
-    }
+  TIMING_PRINT_MEAN ((double) cur, (double) iters);
 }
 
 static void
@@ -123,14 +117,12 @@ do_test (size_t align, int c, size_t len)
   if (align + len > page_size)
     return;
 
-  if (HP_TIMING_AVAIL)
-    printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
+  printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
 
   FOR_EACH_IMPL (impl, 0)
     do_one_test (impl, (char *) buf1 + align, c, len);
 
-  if (HP_TIMING_AVAIL)
-    putchar ('\n');
+  putchar ('\n');
 }
 
 int