S390: Optimize strncat wcsncat.

This patch provides optimized versions of strncat and wcsncat with the z13
vector instructions.

ChangeLog:

	* sysdeps/s390/multiarch/strncat-c.c: New File.
	* sysdeps/s390/multiarch/strncat-vx.S: Likewise.
	* sysdeps/s390/multiarch/strncat.c: Likewise.
	* sysdeps/s390/multiarch/wcsncat-c.c: Likewise.
	* sysdeps/s390/multiarch/wcsncat-vx.S: Likewise.
	* sysdeps/s390/multiarch/wcsncat.c: Likewise.
	* sysdeps/s390/multiarch/Makefile (sysdep_routines): Add strncat and
	wcsncat functions.
	* sysdeps/s390/multiarch/ifunc-impl-list.c
	(__libc_ifunc_impl_list): Add ifunc test for strncat, wcsncat.
	* wcsmbs/wcsncat.c (WCSNCAT): Define and use macro.
	* string/test-strncat.c: Add wcsncat support.
	* wcsmbs/test-wcsncat.c: New File.
	* wcsmbs/Makefile (strop-tests): Add wcsncat.
	* benchtests/bench-strncat.c: Add wcsncat support.
	* benchtests/bench-wcsncat.c: New File.
	* benchtests/Makefile (wcsmbs-bench): Add wcsncat.

1 files changed, 86 insertions, 52 deletions

diff --git a/string/test-strncat.c b/string/test-strncat.c
index 366e6fc..3571568 100644
--- a/string/test-strncat.c
+++ b/string/test-strncat.c
@@ -1,4 +1,4 @@
-/* Test and measure strncat functions.
+/* Test strncat functions.
    Copyright (C) 2011-2015 Free Software Foundation, Inc.
    Contributed by Intel Corporation.
 
@@ -17,33 +17,64 @@
    <http://www.gnu.org/licenses/>.  */
 
 #define TEST_MAIN
-#define TEST_NAME "strncat"
+#ifndef WIDE
+# define TEST_NAME "strncat"
+#else
+# define TEST_NAME "wcsncat"
+#endif /* WIDE */
 #include "test-string.h"
 
-typedef char *(*proto_t) (char *, const char *, size_t);
-char *stupid_strncat (char *, const char *, size_t);
-char *simple_strncat (char *, const char *, size_t);
+#ifndef WIDE
+# define STRNCAT strncat
+# define CHAR char
+# define UCHAR unsigned char
+# define SIMPLE_STRNCAT simple_strncat
+# define STUPID_STRNCAT stupid_strncat
+# define STRLEN strlen
+# define MEMSET memset
+# define MEMCPY memcpy
+# define MEMCMP memcmp
+# define BIG_CHAR CHAR_MAX
+# define SMALL_CHAR 127
+#else
+# include <wchar.h>
+# define STRNCAT wcsncat
+# define CHAR wchar_t
+# define UCHAR wchar_t
+# define SIMPLE_STRNCAT simple_wcsncat
+# define STUPID_STRNCAT stupid_wcsncat
+# define STRLEN wcslen
+# define MEMSET wmemset
+# define MEMCPY wmemcpy
+# define MEMCMP wmemcmp
+# define BIG_CHAR WCHAR_MAX
+# define SMALL_CHAR 1273
+#endif /* WIDE */
 
-IMPL (stupid_strncat, 0)
-IMPL (strncat, 2)
+typedef CHAR *(*proto_t) (CHAR *, const CHAR *, size_t);
+CHAR *STUPID_STRNCAT (CHAR *, const CHAR *, size_t);
+CHAR *SIMPLE_STRNCAT (CHAR *, const CHAR *, size_t);
 
-char *
-stupid_strncat (char *dst, const char *src, size_t n)
+IMPL (STUPID_STRNCAT, 0)
+IMPL (STRNCAT, 2)
+
+CHAR *
+STUPID_STRNCAT (CHAR *dst, const CHAR *src, size_t n)
 {
-  char *ret = dst;
+  CHAR *ret = dst;
   while (*dst++ != '\0');
   --dst;
   while (n--)
-    if ( (*dst++ = *src++) == '\0')
+    if ((*dst++ = *src++) == '\0')
       return ret;
   *dst = '\0';
   return ret;
 }
 
 static void
-do_one_test (impl_t *impl, char *dst, const char *src, size_t n)
+do_one_test (impl_t *impl, CHAR *dst, const CHAR *src, size_t n)
 {
-  size_t k = strlen (dst);
+  size_t k = STRLEN (dst);
   if (CALL (impl, dst, src, n) != dst)
     {
       error (0, 0, "Wrong result in function %s %p != %p", impl->name,
@@ -52,10 +83,10 @@ do_one_test (impl_t *impl, char *dst, const char *src, size_t n)
       return;
     }
 
-  size_t len = strlen (src);
-  if (memcmp (dst + k, src, len + 1 > n ? n : len + 1) != 0)
+  size_t len = STRLEN (src);
+  if (MEMCMP (dst + k, src, len + 1 > n ? n : len + 1) != 0)
     {
-      error (0, 0, "Incorrect cancatination in function %s",
+      error (0, 0, "Incorrect concatenation in function %s",
 	     impl->name);
       ret = 1;
       return;
@@ -74,20 +105,20 @@ do_test (size_t align1, size_t align2, size_t len1, size_t len2,
 	 size_t n, int max_char)
 {
   size_t i;
-  char *s1, *s2;
+  CHAR *s1, *s2;
 
   align1 &= 7;
-  if (align1 + len1 >= page_size)
+  if ((align1 + len1) * sizeof (CHAR) >= page_size)
     return;
-  if (align1 + n > page_size)
+  if ((align1 + n) * sizeof (CHAR) > page_size)
     return;
   align2 &= 7;
-  if (align2 + len1 + len2 >= page_size)
+  if ((align2 + len1 + len2) * sizeof (CHAR) >= page_size)
     return;
-  if (align2 + len1 + n > page_size)
+  if ((align2 + len1 + n) * sizeof (CHAR) > page_size)
     return;
-  s1 = (char *) (buf1 + align1);
-  s2 = (char *) (buf2 + align2);
+  s1 = (CHAR *) (buf1) + align1;
+  s2 = (CHAR *) (buf2) + align2;
 
   for (i = 0; i < len1; ++i)
     s1[i] = 32 + 23 * i % (max_char - 32);
@@ -107,9 +138,10 @@ static void
 do_random_tests (void)
 {
   size_t i, j, n, align1, align2, len1, len2, N;
-  unsigned char *p1 = buf1 + page_size - 512;
-  unsigned char *p2 = buf2 + page_size - 512;
-  unsigned char *res;
+  UCHAR *p1 = (UCHAR *) (buf1 + page_size) - 512;
+  UCHAR *p2 = (UCHAR *) (buf2 + page_size) - 512;
+  UCHAR *p3 = (UCHAR *) buf1;
+  UCHAR *res;
   fprintf (stdout, "Number of iterations in random test = %zd\n",
 	   ITERATIONS);
   for (n = 0; n < ITERATIONS; n++)
@@ -148,26 +180,26 @@ do_random_tests (void)
 	    p1[i] = 0;
 	  else
 	    {
-	      p1[i] = random () & 255;
+	      p1[i] = random () & BIG_CHAR;
 	      if (i >= align1 && i < len1 + align1 && !p1[i])
-		p1[i] = (random () & 127) + 3;
+		p1[i] = (random () & SMALL_CHAR) + 3;
 	    }
 	}
       for (i = 0; i < len2; i++)
 	{
-	  buf1[i] = random () & 255;
-	  if (!buf1[i])
-	    buf1[i] = (random () & 127) + 3;
+	  p3[i] = random () & BIG_CHAR;
+	  if (!p3[i])
+	    p3[i] = (random () & SMALL_CHAR) + 3;
 	}
-      buf1[len2] = 0;
+      p3[len2] = 0;
 
       FOR_EACH_IMPL (impl, 1)
 	{
-	  memset (p2 - 64, '\1', align2 + 64);
-	  memset (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
-	  memcpy (p2 + align2, buf1, len2 + 1);
-	  res = (unsigned char *) CALL (impl, (char *) (p2 + align2),
-					(char *) (p1 + align1), N);
+	  MEMSET (p2 - 64, '\1', align2 + 64);
+	  MEMSET (p2 + align2 + len2 + 1, '\1', 512 - align2 - len2 - 1);
+	  MEMCPY (p2 + align2, p3, len2 + 1);
+	  res = (UCHAR *) CALL (impl, (CHAR *) (p2 + align2),
+				(CHAR *) (p1 + align1), N);
 	  if (res != p2 + align2)
 	    {
 	      error (0, 0, "Iteration %zd - wrong result in function %s "
@@ -187,7 +219,7 @@ do_random_tests (void)
 		  break;
 		}
 	    }
-	  if (memcmp (p2 + align2, buf1, len2))
+	  if (MEMCMP (p2 + align2, p3, len2))
 	    {
 	      error (0, 0, "Iteration %zd - garbage in string before, %s "
 		     "(%zd, %zd, %zd, %zd, %zd)",
@@ -220,7 +252,7 @@ do_random_tests (void)
 		  ret = 1;
 		}
 	    }
-	  if (memcmp (p1 + align1, p2 + align2 + len2,
+	  if (MEMCMP (p1 + align1, p2 + align2 + len2,
 		      (len1 + 1) > N ? N : len1 + 1))
 	    {
 	      error (0, 0, "Iteration %zd - different strings, %s "
@@ -233,7 +265,7 @@ do_random_tests (void)
 }
 
 int
-main (void)
+test_main (void)
 {
   size_t i, n;
 
@@ -246,28 +278,30 @@ main (void)
 
   for (n = 2; n <= 2048; n*=4)
     {
-      do_test (0, 2, 2, 2, n, 127);
-      do_test (0, 0, 4, 4, n, 127);
-      do_test (4, 0, 4, 4, n, 255);
-      do_test (0, 0, 8, 8, n, 127);
-      do_test (0, 8, 8, 8, n, 127);
+      do_test (0, 2, 2, 2, n, SMALL_CHAR);
+      do_test (0, 0, 4, 4, n, SMALL_CHAR);
+      do_test (4, 0, 4, 4, n, BIG_CHAR);
+      do_test (0, 0, 8, 8, n, SMALL_CHAR);
+      do_test (0, 8, 8, 8, n, SMALL_CHAR);
 
       for (i = 1; i < 8; ++i)
 	{
-	  do_test (0, 0, 8 << i, 8 << i, n, 127);
-	  do_test (8 - i, 2 * i, 8 << i, 8 << i, n, 127);
-	  do_test (0, 0, 8 << i, 2 << i, n, 127);
-	  do_test (8 - i, 2 * i, 8 << i, 2 << i, n, 127);
+	  do_test (0, 0, 8 << i, 8 << i, n, SMALL_CHAR);
+	  do_test (8 - i, 2 * i, 8 << i, 8 << i, n, SMALL_CHAR);
+	  do_test (0, 0, 8 << i, 2 << i, n, SMALL_CHAR);
+	  do_test (8 - i, 2 * i, 8 << i, 2 << i, n, SMALL_CHAR);
 	}
 
       for (i = 1; i < 8; ++i)
 	{
-	  do_test (i, 2 * i, 8 << i, 1, n, 127);
-	  do_test (2 * i, i, 8 << i, 1, n, 255);
-	  do_test (i, i, 8 << i, 10, n, 127);
+	  do_test (i, 2 * i, 8 << i, 1, n, SMALL_CHAR);
+	  do_test (2 * i, i, 8 << i, 1, n, BIG_CHAR);
+	  do_test (i, i, 8 << i, 10, n, SMALL_CHAR);
 	}
     }
 
   do_random_tests ();
   return ret;
 }
+
+#include "../test-skeleton.c"