x86: Expand bench-memcmp.c and test-memcmp.c

No bug. This commit adds some additional performance test cases to
bench-memcmp.c and test-memcmp.c. The new benchtests include some
medium range sizes, as well as small sizes near page cross. The new
correctness tests correspond with the new benchtests though add some
additional cases for checking the page cross logic.

Signed-off-by: Noah Goldstein <goldstein.w.n@gmail.com>
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>

1 files changed, 26 insertions, 6 deletions

diff --git a/benchtests/bench-memcmp.c b/benchtests/bench-memcmp.c
index eb0f94a..744c7ec 100644
--- a/benchtests/bench-memcmp.c
+++ b/benchtests/bench-memcmp.c
@@ -88,11 +88,11 @@ do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
   if (len == 0)
     return;
 
-  align1 &= 63;
+  align1 &= (4096 - CHARBYTES);
   if (align1 + (len + 1) * CHARBYTES >= page_size)
     return;
 
-  align2 &= 63;
+  align2 &= (4096 - CHARBYTES);
   if (align2 + (len + 1) * CHARBYTES >= page_size)
     return;
 
@@ -100,6 +100,7 @@ do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len,
   json_attr_uint (json_ctx, "length", (double) len);
   json_attr_uint (json_ctx, "align1", (double) align1);
   json_attr_uint (json_ctx, "align2", (double) align2);
+  json_attr_uint (json_ctx, "result", (double) exp_result);
   json_array_begin (json_ctx, "timings");
 
   FOR_EACH_IMPL (impl, 0)
@@ -145,18 +146,31 @@ test_main (void)
   json_array_end (&json_ctx);
 
   json_array_begin (&json_ctx, "results");
-  for (i = 1; i < 16; ++i)
+  for (i = 1; i < 32; ++i)
     {
       do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 0);
       do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, 1);
       do_test (&json_ctx, i * CHARBYTES, i * CHARBYTES, i, -1);
     }
 
-  for (i = 0; i < 16; ++i)
+  for (i = 0; i < 32; ++i)
     {
       do_test (&json_ctx, 0, 0, i, 0);
       do_test (&json_ctx, 0, 0, i, 1);
       do_test (&json_ctx, 0, 0, i, -1);
+      do_test (&json_ctx, 4096 - i, 0, i, 0);
+      do_test (&json_ctx, 4096 - i, 0, i, 1);
+      do_test (&json_ctx, 4096 - i, 0, i, -1);
+    }
+
+  for (i = 33; i < 385; i += 32)
+    {
+      do_test (&json_ctx, 0, 0, i, 0);
+      do_test (&json_ctx, 0, 0, i, 1);
+      do_test (&json_ctx, 0, 0, i, -1);
+      do_test (&json_ctx, i, 0, i, 0);
+      do_test (&json_ctx, 0, i, i, 1);
+      do_test (&json_ctx, i, i, i, -1);
     }
 
   for (i = 1; i < 10; ++i)
@@ -164,13 +178,19 @@ test_main (void)
       do_test (&json_ctx, 0, 0, 2 << i, 0);
       do_test (&json_ctx, 0, 0, 2 << i, 1);
       do_test (&json_ctx, 0, 0, 2 << i, -1);
-      do_test (&json_ctx, 0, 0, 16 << i, 0);
       do_test (&json_ctx, (8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
+      do_test (&json_ctx, 0, 0, 16 << i, 0);
       do_test (&json_ctx, 0, 0, 16 << i, 1);
       do_test (&json_ctx, 0, 0, 16 << i, -1);
+      do_test (&json_ctx, i, 0, 2 << i, 0);
+      do_test (&json_ctx, 0, i, 2 << i, 1);
+      do_test (&json_ctx, i, i, 2 << i, -1);
+      do_test (&json_ctx, i, 0, 16 << i, 0);
+      do_test (&json_ctx, 0, i, 16 << i, 1);
+      do_test (&json_ctx, i, i, 16 << i, -1);
     }
 
-  for (i = 1; i < 8; ++i)
+  for (i = 1; i < 10; ++i)
     {
       do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
       do_test (&json_ctx, i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);