Use generic memset/memcpy/memmove in benchtests

Use the generic C memset/memcpy/memmove in benchtests since comparing
against a slow byte-oriented implementation makes no sense.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

2019-08-29  Wilco Dijkstra  <wdijkstr@arm.com>

	* benchtests/bench-memcpy.c (simple_memcpy): Remove.
	(generic_memcpy): Include generic C memcpy.
	* benchtests/bench-memmove.c (simple_memmove): Remove.
	(generic_memmove): Include generic C memmove.
	* benchtests/bench-memset.c (simple_memset): Remove.
	(generic_memset): Include generic C memset.
	* benchtests/bench-memset-large.c (simple_memset): Remove.
	(generic_memset): Include generic C memset.
	* benchtests/bench-memset-walk.c (simple_memset): Remove.
	(generic_memset): Include generic C memset.
	* string/memcpy.c (MEMCPY): Add defines to enable redirection.
	* string/memset.c (MEMSET): Likewise.
	* sysdeps/x86_64/memcopy.h: Remove empty file.

ChangeLog

@@ -1,3 +1,19 @@
+2019-08-30  Wilco Dijkstra  <wdijkstr@arm.com>
+
+	* benchtests/bench-memcpy.c (simple_memcpy): Remove.
+	(generic_memcpy): Include generic C memcpy.
+	* benchtests/bench-memmove.c (simple_memmove): Remove.
+	(generic_memmove): Include generic C memmove.
+	* benchtests/bench-memset.c (simple_memset): Remove.
+	(generic_memset): Include generic C memset.
+	* benchtests/bench-memset-large.c (simple_memset): Remove.
+	(generic_memset): Include generic C memset.
+	* benchtests/bench-memset-walk.c (simple_memset): Remove.
+	(generic_memset): Include generic C memset.
+	* string/memcpy.c (MEMCPY): Add defines to enable redirection.
+	* string/memset.c (MEMSET): Likewise.
+	* sysdeps/x86_64/memcopy.h: Remove empty file.
+
 2019-08-30  Florian Weimer  <fweimer@redhat.com>
 
 	nptl: Move pthread_attr_getinheritsched implementation into libc.

benchtests/bench-memcpy.c

@@ -23,23 +23,16 @@
 # define TEST_NAME "memcpy"
 # include "bench-string.h"
 
-char *
+void *generic_memcpy (void *, const void *, size_t);
-simple_memcpy (char *dst, const char *src, size_t n)
-{
-  char *ret = dst;
-  while (n--)
-    *dst++ = *src++;
-  return ret;
-}
 
 IMPL (memcpy, 1)
-IMPL (simple_memcpy, 0)
+IMPL (generic_memcpy, 0)
 
 #endif
 
 # include "json-lib.h"
 
-typedef char *(*proto_t) (char *, const char *, size_t);
+typedef void *(*proto_t) (void *, const void *, size_t);
 
 static void
 do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,
@@ -161,3 +154,9 @@ test_main (void)
 }
 
 #include <support/test-driver.c>
+
+#define libc_hidden_builtin_def(X)
+#undef MEMCPY
+#define MEMCPY generic_memcpy
+#include <string/memcpy.c>
+#include <string/wordcopy.c>

benchtests/bench-memmove.c

@@ -21,30 +21,12 @@
 #include "bench-string.h"
 #include "json-lib.h"
 
-char *simple_memmove (char *, const char *, size_t);
+void *generic_memmove (void *, const void *, size_t);
 
-typedef char *(*proto_t) (char *, const char *, size_t);
+typedef void *(*proto_t) (void *, const void *, size_t);
 
 IMPL (memmove, 1)
-IMPL (simple_memmove, 0)
+IMPL (generic_memmove, 0)
-
-char *
-inhibit_loop_to_libcall
-simple_memmove (char *dst, const char *src, size_t n)
-{
-  char *ret = dst;
-  if (src < dst)
-    {
-      dst += n;
-      src += n;
-      while (n--)
-	*--dst = *--src;
-    }
-  else
-    while (n--)
-      *dst++ = *src++;
-  return ret;
-}
 
 static void
 do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src,
@@ -165,3 +147,9 @@ test_main (void)
 }
 
 #include <support/test-driver.c>
+
+#define libc_hidden_builtin_def(X)
+#undef MEMMOVE
+#define MEMMOVE generic_memmove
+#include <string/memmove.c>
+#include <string/wordcopy.c>

benchtests/bench-memset-large.c

@@ -17,38 +17,20 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#ifndef WIDE
 #define TEST_NAME "memset"
-#else
-# define TEST_NAME "wmemset"
-#endif /* WIDE */
 #define START_SIZE (128 * 1024)
 #define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024)
 #define TIMEOUT (20 * 60)
 #include "bench-string.h"
 
-#ifndef WIDE
-# define SIMPLE_MEMSET simple_memset
-#else
-# define SIMPLE_MEMSET simple_wmemset
-#endif /* WIDE */
-
 #include <assert.h>
 #include "json-lib.h"
 
+void *generic_memset (void *, int, size_t);
+typedef void *(*proto_t) (void *, int, size_t);
+
 IMPL (MEMSET, 1)
-
+IMPL (generic_memset, 0)
-typedef CHAR *(*proto_t) (CHAR *, int, size_t);
-
-CHAR *
-inhibit_loop_to_libcall
-SIMPLE_MEMSET (CHAR *s, int c, size_t n)
-{
-  CHAR *r = s, *end = s + n;
-  while (r < end)
-    *r++ = c;
-  return s;
-}
 
 static void
 do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,
@@ -133,3 +115,11 @@ test_main (void)
 }
 
 #include <support/test-driver.c>
+
+#define libc_hidden_builtin_def(X)
+#define libc_hidden_def(X)
+#define libc_hidden_weak(X)
+#define weak_alias(X,Y)
+#undef MEMSET
+#define MEMSET generic_memset
+#include <string/memset.c>

benchtests/bench-memset-walk.c

@@ -17,39 +17,20 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#ifndef WIDE
 #define TEST_NAME "memset"
-#else
-# define TEST_NAME "wmemset"
-#endif /* WIDE */
 #define START_SIZE 128
 #define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
 #define TIMEOUT (20 * 60)
 #include "bench-string.h"
 
-#ifndef WIDE
-# define SIMPLE_MEMSET simple_memset
-#else
-# define SIMPLE_MEMSET simple_wmemset
-#endif /* WIDE */
-
 #include <assert.h>
 #include "json-lib.h"
 
+void *generic_memset (void *, int, size_t);
+typedef void *(*proto_t) (void *, int, size_t);
 
-typedef CHAR *(*proto_t) (CHAR *, int, size_t);
+IMPL (MEMSET, 1)
-
+IMPL (generic_memset, 0)
-CHAR *
-inhibit_loop_to_libcall
-SIMPLE_MEMSET (CHAR *s, int c, size_t n)
-{
-  CHAR *r = s, *end = s + n;
-  while (r < end)
-    *r++ = c;
-  return s;
-}
-
-IMPL (SIMPLE_MEMSET, 1)
 
 static void
 do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s, CHAR *s_end,
@@ -132,3 +113,11 @@ test_main (void)
 }
 
 #include <support/test-driver.c>
+
+#define libc_hidden_builtin_def(X)
+#define libc_hidden_def(X)
+#define libc_hidden_weak(X)
+#define weak_alias(X,Y)
+#undef MEMSET
+#define MEMSET generic_memset
+#include <string/memset.c>

benchtests/bench-memset.c

@@ -21,28 +21,23 @@
 # define TEST_NAME "memset"
 #else
 # define TEST_NAME "wmemset"
+# define generic_memset generic_wmemset
 #endif /* WIDE */
 #define MIN_PAGE_SIZE 131072
 #include "bench-string.h"
 
 #include "json-lib.h"
 
-CHAR *SIMPLE_MEMSET (CHAR *, int, size_t);
+#ifdef WIDE
+CHAR *generic_wmemset (CHAR *, CHAR, size_t);
+#else
+void *generic_memset (void *, int, size_t);
+#endif
 
-typedef CHAR *(*proto_t) (CHAR *, int, size_t);
+typedef void *(*proto_t) (void *, int, size_t);
 
 IMPL (MEMSET, 1)
-IMPL (SIMPLE_MEMSET, 0)
+IMPL (generic_memset, 0)
-
-CHAR *
-inhibit_loop_to_libcall
-SIMPLE_MEMSET (CHAR *s, int c, size_t n)
-{
-  CHAR *r = s, *end = s + n;
-  while (r < end)
-    *r++ = c;
-  return s;
-}
 
 static void
 do_one_test (json_ctx_t *json_ctx, impl_t *impl, CHAR *s,
@@ -146,3 +141,16 @@ test_main (void)
 }
 
 #include <support/test-driver.c>
+
+#define libc_hidden_builtin_def(X)
+#define libc_hidden_def(X)
+#define libc_hidden_weak(X)
+#define weak_alias(X,Y)
+#ifndef WIDE
+# undef MEMSET
+# define MEMSET generic_memset
+# include <string/memset.c>
+#else
+# define WMEMSET generic_wmemset
+# include <wcsmbs/wmemset.c>
+#endif

string/memcpy.c

@@ -21,10 +21,12 @@
 #include <string.h>
 #include <memcopy.h>
 
-#undef memcpy
+#ifndef MEMCPY
+# define MEMCPY memcpy
+#endif
 
 void *
-memcpy (void *dstpp, const void *srcpp, size_t len)
+MEMCPY (void *dstpp, const void *srcpp, size_t len)
 {
   unsigned long int dstp = (long int) dstpp;
   unsigned long int srcp = (long int) srcpp;
@@ -57,4 +59,4 @@ memcpy (void *dstpp, const void *srcpp, size_t len)
 
   return dstpp;
 }
-libc_hidden_builtin_def (memcpy)
+libc_hidden_builtin_def (MEMCPY)

string/memset.c

@@ -18,11 +18,13 @@
 #include <string.h>
 #include <memcopy.h>
 
-#undef memset
+#ifndef MEMSET
+# define MEMSET memset
+#endif
 
 void *
 inhibit_loop_to_libcall
-memset (void *dstpp, int c, size_t len)
+MEMSET (void *dstpp, int c, size_t len)
 {
   long int dstp = (long int) dstpp;
 
@@ -85,4 +87,4 @@ memset (void *dstpp, int c, size_t len)
 
   return dstpp;
 }
-libc_hidden_builtin_def (memset)
+libc_hidden_builtin_def (MEMSET)

sysdeps/x86_64/memcopy.h

@@ -1 +0,0 @@
-/* X86-64 doesn't use memory copy functions.  */