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

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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>
This commit is contained in:
Noah Goldstein
2021-05-17 13:56:17 -04:00
parent 3f500e7202
commit e68d6fccca
2 changed files with 60 additions and 12 deletions
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40
string/test-memcmp.c
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@@ -111,11 +111,11 @@ do_test (size_t align1, size_t align2, size_t len, int exp_result)
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;
@@ -487,18 +487,40 @@ test_main (void)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 16; ++i)
for (i = 1; i < 32; ++i)
{
do_test (i * CHARBYTES, i * CHARBYTES, i, 0);
do_test (i * CHARBYTES, i * CHARBYTES, i, 1);
do_test (i * CHARBYTES, i * CHARBYTES, i, -1);
}
for (i = 0; i < 16; ++i)
for (i = 0; i < 32; ++i)
{
do_test (0, 0, i, 0);
do_test (0, 0, i, 1);
do_test (0, 0, i, -1);
do_test (4096 - i, 0, i, 0);
do_test (4096 - i, 0, i, 1);
do_test (4096 - i, 0, i, -1);
do_test (4095, 0, i, 0);
do_test (4095, 0, i, 1);
do_test (4095, 0, i, -1);
do_test (4095, 4095, i, 0);
do_test (4095, 4095, i, 1);
do_test (4095, 4095, i, -1);
do_test (4000, 95, i, 0);
do_test (4000, 95, i, 1);
do_test (4000, 95, i, -1);
}
for (i = 33; i < 385; i += 32)
{
do_test (0, 0, i, 0);
do_test (0, 0, i, 1);
do_test (0, 0, i, -1);
do_test (i, 0, i, 0);
do_test (0, i, i, 1);
do_test (i, i, i, -1);
}
for (i = 1; i < 10; ++i)
@@ -506,13 +528,19 @@ test_main (void)
do_test (0, 0, 2 << i, 0);
do_test (0, 0, 2 << i, 1);
do_test (0, 0, 2 << i, -1);
do_test (0, 0, 16 << i, 0);
do_test ((8 - i) * CHARBYTES, (2 * i) * CHARBYTES, 16 << i, 0);
do_test (0, 0, 16 << i, 0);
do_test (0, 0, 16 << i, 1);
do_test (0, 0, 16 << i, -1);
do_test (i, 0, 2 << i, 0);
do_test (0, i, 2 << i, 1);
do_test (i, i, 2 << i, -1);
do_test (i, 0, 16 << i, 0);
do_test (0, i, 16 << i, 1);
do_test (i, i, 16 << i, -1);
}
for (i = 1; i < 8; ++i)
for (i = 1; i < 10; ++i)
{
do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 0);
do_test (i * CHARBYTES, 2 * (i * CHARBYTES), 8 << i, 1);