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glibc/string/test-strcasecmp.c
Siddhesh Poyarekar 67e3b0c63c tests/string: Drop simple/stupid/builtin tests 
In most cases the simple/stupid/builtin functions were in there to
benchmark optimized implementations against.  Only in some cases the
functions are used to check expected results.

Remove these tests from IMPL() and only keep them in wherever they're
used for a specific purpose, e.g. to generate expected results.

This improves timing of `make subdirs=string` by over a minute and a
half (over 15%) on a Whiskey Lake laptop.

Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
Reviewed-by: Noah Goldstein <libc-alpha@sourceware.org>
2022-04-06 20:53:24 +05:30

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/* Test and measure strcasecmp functions.
Copyright (C) 1999-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <locale.h>
#include <ctype.h>
#include <assert.h>
#define TEST_LEN (getpagesize () * 3)
#define MIN_PAGE_SIZE (TEST_LEN + 2 * getpagesize ())
#define TEST_MAIN
#define TEST_NAME "strcasecmp"
#include "test-string.h"
typedef int (*proto_t) (const char *, const char *);
IMPL (strcasecmp, 1)
/* Naive implementation to verify results. */
int
simple_strcasecmp (const char *s1, const char *s2)
{
int ret;
while ((ret = ((unsigned char) tolower (*s1)
- (unsigned char) tolower (*s2))) == 0
&& *s1++)
++s2;
return ret;
}
static void
do_one_test (impl_t *impl, const char *s1, const char *s2, int exp_result)
{
int result = CALL (impl, s1, s2);
if ((exp_result == 0 && result != 0)
|| (exp_result < 0 && result >= 0)
|| (exp_result > 0 && result <= 0))
{
error (0, 0, "Wrong result in function %s %d %d", impl->name,
result, exp_result);
ret = 1;
return;
}
}
static void
do_test (size_t align1, size_t align2, size_t len, int max_char,
int exp_result)
{
size_t i;
char *s1, *s2;
if (len == 0)
return;
align1 &= getpagesize () - 1;
if (align1 + (len + 1) >= page_size)
return;
align2 &= getpagesize () - 1;
if (align2 + (len + 1) >= page_size)
return;
s1 = (char *) (buf1 + align1);
s2 = (char *) (buf2 + align2);
for (i = 0; i < len; i++)
{
s1[i] = toupper (1 + 23 * i % max_char);
s2[i] = tolower (s1[i]);
}
s1[len] = s2[len] = 0;
s1[len + 1] = 23;
s2[len + 1] = 24 + exp_result;
if ((s2[len - 1] == 'z' && exp_result == -1)
|| (s2[len - 1] == 'a' && exp_result == 1))
s1[len - 1] += exp_result;
else if ((s1[len - 1] == 'Z' + 1 && exp_result == 1)
|| (s1[len - 1] == 'A' - 1 && exp_result == -1))
s1[len - 1] = tolower (s2[len - 1]) + exp_result;
else
s2[len - 1] -= exp_result;
/* For some locals this is not guranteed yet. */
if (tolower (s1[len - 1]) - tolower (s2[len - 1]) != exp_result)
{
if (exp_result == -1)
{
s1[len - 1] = tolower ('a');
s2[len - 1] = toupper (tolower ('a') - 1);
}
else if (exp_result == 0)
s1[len - 1] = toupper (s2[len - 1]);
else
{
s1[len - 1] = tolower ('a');
s2[len - 1] = toupper (tolower ('a') + 1);
}
}
FOR_EACH_IMPL (impl, 0)
do_one_test (impl, s1, s2, exp_result);
}
static void
do_random_tests (void)
{
size_t i, j, n, align1, align2, pos, len1, len2;
int result;
long r;
unsigned char *p1 = buf1 + page_size - 512;
unsigned char *p2 = buf2 + page_size - 512;
for (n = 0; n < ITERATIONS; n++)
{
align1 = random () & 31;
if (random () & 1)
align2 = random () & 31;
else
align2 = align1 + (random () & 24);
pos = random () & 511;
j = align1 > align2 ? align1 : align2;
if (pos + j >= 511)
pos = 510 - j - (random () & 7);
len1 = random () & 511;
if (pos >= len1 && (random () & 1))
len1 = pos + (random () & 7);
if (len1 + j >= 512)
len1 = 511 - j - (random () & 7);
if (pos >= len1)
len2 = len1;
else
len2 = len1 + (len1 != 511 - j ? random () % (511 - j - len1) : 0);
j = (pos > len2 ? pos : len2) + align1 + 64;
if (j > 512)
j = 512;
for (i = 0; i < j; ++i)
{
p1[i] = tolower (random () & 255);
if (i < len1 + align1 && !p1[i])
{
p1[i] = tolower (random () & 255);
if (!p1[i])
p1[i] = tolower (1 + (random () & 127));
}
}
for (i = 0; i < j; ++i)
{
p2[i] = toupper (random () & 255);
if (i < len2 + align2 && !p2[i])
{
p2[i] = toupper (random () & 255);
if (!p2[i])
toupper (p2[i] = 1 + (random () & 127));
}
}
result = 0;
memcpy (p2 + align2, p1 + align1, pos);
if (pos < len1)
{
if (tolower (p2[align2 + pos]) == p1[align1 + pos])
{
p2[align2 + pos] = toupper (random () & 255);
if (tolower (p2[align2 + pos]) == p1[align1 + pos])
p2[align2 + pos] = toupper (p1[align1 + pos]
+ 3 + (random () & 127));
}
if (p1[align1 + pos] < tolower (p2[align2 + pos]))
result = -1;
else
result = 1;
}
p1[len1 + align1] = 0;
p2[len2 + align2] = 0;
FOR_EACH_IMPL (impl, 1)
{
r = CALL (impl, (char *) (p1 + align1), (char *) (p2 + align2));
/* Test whether on 64-bit architectures where ABI requires
callee to promote has the promotion been done. */
asm ("" : "=g" (r) : "0" (r));
if ((r == 0 && result)
|| (r < 0 && result >= 0)
|| (r > 0 && result <= 0))
{
error (0, 0, "Iteration %zd - wrong result in function %s (%zd, %zd, %zd, %zd, %zd) %ld != %d, p1 %p p2 %p",
n, impl->name, align1, align2, len1, len2, pos, r, result, p1, p2);
ret = 1;
}
}
}
}
static void
test_locale (const char *locale, int extra_tests)
{
size_t i, j, k;
const size_t test_len = MIN(TEST_LEN, 3 * 4096);
if (setlocale (LC_CTYPE, locale) == NULL)
{
error (0, 0, "cannot set locale \"%s\"", locale);
ret = 1;
}
printf ("%-23s", locale);
FOR_EACH_IMPL (impl, 0)
printf ("\t%s", impl->name);
putchar ('\n');
for (i = 1; i < 16; ++i)
{
do_test (i, i, i, 127, 0);
do_test (i, i, i, 127, 1);
do_test (i, i, i, 127, -1);
}
for (i = 1; i < 10; ++i)
{
do_test (0, 0, 2 << i, 127, 0);
do_test (0, 0, 2 << i, 254, 0);
do_test (0, 0, 2 << i, 127, 1);
do_test (0, 0, 2 << i, 254, 1);
do_test (0, 0, 2 << i, 127, -1);
do_test (0, 0, 2 << i, 254, -1);
}
for (i = 1; i < 8; ++i)
{
do_test (i, 2 * i, 8 << i, 127, 0);
do_test (2 * i, i, 8 << i, 254, 0);
do_test (i, 2 * i, 8 << i, 127, 1);
do_test (2 * i, i, 8 << i, 254, 1);
do_test (i, 2 * i, 8 << i, 127, -1);
do_test (2 * i, i, 8 << i, 254, -1);
}
for (j = 0; extra_tests && j < 160; ++j)
{
for (i = 0; i < test_len;)
{
do_test (getpagesize () - j - 1, 0, i, 127, 0);
do_test (getpagesize () - j - 1, 0, i, 127, 1);
do_test (getpagesize () - j - 1, 0, i, 127, -1);
do_test (getpagesize () - j - 1, j, i, 127, 0);
do_test (getpagesize () - j - 1, j, i, 127, 1);
do_test (getpagesize () - j - 1, j, i, 127, -1);
do_test (0, getpagesize () - j - 1, i, 127, 0);
do_test (0, getpagesize () - j - 1, i, 127, 1);
do_test (0, getpagesize () - j - 1, i, 127, -1);
do_test (j, getpagesize () - j - 1, i, 127, 0);
do_test (j, getpagesize () - j - 1, i, 127, 1);
do_test (j, getpagesize () - j - 1, i, 127, -1);
for (k = 2; k <= 128; k += k)
{
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 0);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
0);
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, 1);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
1);
do_test (getpagesize () - k, getpagesize () - j - 1, i, 127, -1);
do_test (getpagesize () - k - 1, getpagesize () - j - 1, i, 127,
-1);
}
if (i < 32)
{
i += 1;
}
else if (i < 161)
{
i += 7;
}
else if (i + 161 < test_len)
{
i += 31;
i *= 17;
i /= 16;
if (i + 161 > test_len)
{
i = test_len - 160;
}
}
else if (i + 32 < test_len)
{
i += 7;
}
else
{
i += 1;
}
}
}
do_random_tests ();
}
int
test_main (void)
{
test_init ();
test_locale ("C", 1);
test_locale ("en_US.ISO-8859-1", 0);
test_locale ("en_US.UTF-8", 0);
test_locale ("tr_TR.ISO-8859-9", 0);
test_locale ("tr_TR.UTF-8", 0);
return ret;
}
#include <support/test-driver.c>
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