GNU C Library master sources branch hjl/memcmp/avx2 updated. glibc-2.25-537-g3f422f5

[hjl at sourceware dot org]

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       via  3f422f51cbcae44360f99b386661ab974a8246cf (commit)
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- Log -----------------------------------------------------------------
http://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=3f422f51cbcae44360f99b386661ab974a8246cf

commit 3f422f51cbcae44360f99b386661ab974a8246cf
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Wed Jun 21 10:16:07 2017 -0700

    Add do_test2

diff --git a/benchtests/bench-memcmp.c b/benchtests/bench-memcmp.c
index 84cba9a..a159cf4 100644
--- a/benchtests/bench-memcmp.c
+++ b/benchtests/bench-memcmp.c
@@ -120,7 +120,48 @@ do_test (size_t align1, size_t align2, size_t len, int exp_result)
   s2[len] = align2;
   s2[len - 1] -= exp_result;
 
-  printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+  printf ("Length %4zd, Diff %4zd, alignment %2zd/%2zd:",
+	  len, len, align1, align2);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s1, s2, len, exp_result);
+
+  putchar ('\n');
+}
+
+static void
+do_test2 (size_t align1, size_t align2, size_t len, size_t diff,
+	  int exp_result)
+{
+  size_t i;
+  CHAR *s1, *s2;
+
+  if (len == 0)
+    return;
+
+  if (diff > len)
+    return;
+
+  align1 &= 63;
+  if (align1 + (len + 1) * CHARBYTES >= page_size)
+    return;
+
+  align2 &= 63;
+  if (align2 + (len + 1) * CHARBYTES >= page_size)
+    return;
+
+  s1 = (CHAR *) (buf1 + align1);
+  s2 = (CHAR *) (buf2 + align2);
+
+  for (i = 0; i < len; i++)
+    s1[i] = s2[i] = 1 + (23 << ((CHARBYTES - 1) * 8)) * i % CHAR__MAX;
+
+  s1[len] = align1;
+  s2[len] = align2;
+  s2[diff - 1] -= exp_result;
+
+  printf ("Length %4zd, Diff %4zd, alignment %2zd/%2zd:",
+	  len, diff, align1, align2);
 
   FOR_EACH_IMPL (impl, 0)
     do_one_test (impl, s1, s2, len, exp_result);
@@ -140,6 +181,13 @@ test_main (void)
     printf ("\t%s", impl->name);
   putchar ('\n');
 
+  for (i = 32; i < 64; ++i)
+    {
+      do_test2 (0, 0, i, 31, 1);
+      do_test2 (0, 0, i, 31, -1);
+      do_test2 (0, 0, i, 31, 0);
+    }
+
   for (i = 1; i < 16; ++i)
     {
       do_test (i * CHARBYTES, i * CHARBYTES, i, 0);

-----------------------------------------------------------------------

Summary of changes:
 benchtests/bench-memcmp.c |   50 ++++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 49 insertions(+), 1 deletions(-)


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