cryb-to/t/t_ffs_fls.c
2022-09-16 11:09:55 +02:00

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/*-
* Copyright (c) 2014-2018 Dag-Erling Smørgrav
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include "cryb/impl.h"
#include <stddef.h>
#include <stdint.h>
#include <unistd.h>
/* test our own code, not the compiler's */
#undef HAVE___BUILTIN_CLZ
#undef HAVE___BUILTIN_CTZ
#undef HAVE___BUILTIN_FFS
#undef HAVE___BUILTIN_FFSL
#undef HAVE___BUILTIN_FFSLL
#undef HAVE___BUILTIN_FLS
#undef HAVE___BUILTIN_FLSL
#undef HAVE___BUILTIN_FLSLL
#include <cryb/bitwise.h>
#include <cryb/test.h>
static int
t_ffs(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
int u;
int n, ret;
ret = t_is_zero_i(cryb_ffs(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++) {
t_printv("ffs(0x%08x) == %d\n", u, cryb_ffs(u));
ret &= t_compare_i(n, cryb_ffs(u));
}
return (ret);
}
static int
t_ffsl(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
long int u;
int n, ret;
ret = t_is_zero_i(cryb_ffs(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++)
ret &= t_compare_i(n, cryb_ffsl(u));
return (ret);
}
static int
t_ffsll(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
long long int u;
int n, ret;
ret = t_is_zero_i(cryb_ffs(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++)
ret &= t_compare_i(n, cryb_ffsll(u));
return (ret);
}
static int
t_fls(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
unsigned int u;
int n, ret;
ret = t_is_zero_i(cryb_fls(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++) {
t_printv("fls(0x%08x) == %d\n", u, cryb_fls(u));
ret &= t_compare_i(n, cryb_fls(u));
}
return (ret);
}
static int
t_flsl(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
unsigned long int u;
int n, ret;
ret = t_is_zero_i(cryb_flsl(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++) {
t_printv("flsl(0x%08lx) == %d\n", u, cryb_flsl(u));
ret &= t_compare_i(n, cryb_flsl(u));
}
return (ret);
}
static int
t_flsll(char **desc CRYB_UNUSED, void *arg CRYB_UNUSED)
{
unsigned long long int u;
int n, ret;
ret = t_is_zero_i(cryb_flsll(0));
for (u = 1, n = 1; u != 0; u <<= 1, n++) {
t_printv("flsll(0x%016llx) == %d\n", u, cryb_flsll(u));
ret &= t_compare_i(n, cryb_flsll(u));
}
return (ret);
}
/***************************************************************************
* Boilerplate
*/
static int
t_prepare(int argc CRYB_UNUSED, char *argv[] CRYB_UNUSED)
{
t_add_test(t_ffs, 0, "ffs");
t_add_test(t_ffsl, 0, "ffsl");
t_add_test(t_ffsll, 0, "ffsll");
t_add_test(t_fls, 0, "fls");
t_add_test(t_flsl, 0, "flsl");
t_add_test(t_flsll, 0, "flsll");
return (0);
}
int
main(int argc, char *argv[])
{
t_main(t_prepare, NULL, argc, argv);
}