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/* Test mpn_mod_1 variants.
Copyright 2010 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP 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 3 of the License, or (at your
option) any later version.
The GNU MP 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 MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <stdlib.h>
#include "gmp.h"
#include "gmp-impl.h"
#include "tests.h"
static void
check_one (mp_srcptr ap, mp_size_t n, mp_limb_t b)
{
mp_limb_t r_ref = refmpn_mod_1 (ap, n, b);
mp_limb_t r;
if (n >= 2)
{
mp_limb_t pre[4];
mpn_mod_1_1p_cps (pre, b);
r = mpn_mod_1_1p (ap, n, b << pre[1], pre);
if (r != r_ref)
{
printf ("mpn_mod_1_1p failed\n");
goto fail;
}
}
if ((b & GMP_NUMB_HIGHBIT) == 0)
{
mp_limb_t pre[5];
mpn_mod_1s_2p_cps (pre, b);
r = mpn_mod_1s_2p (ap, n, b << pre[1], pre);
if (r != r_ref)
{
printf ("mpn_mod_1s_2p failed\n");
goto fail;
}
}
if (b <= GMP_NUMB_MASK / 4)
{
mp_limb_t pre[7];
mpn_mod_1s_4p_cps (pre, b);
r = mpn_mod_1s_4p (ap, n, b << pre[1], pre);
if (r != r_ref)
{
printf ("mpn_mod_1s_4p failed\n");
goto fail;
}
}
r = mpn_mod_1 (ap, n, b);
if (r != r_ref)
{
printf ("mpn_mod_1 failed\n");
fail:
printf ("an = %d, a: ", (int) n); mpn_dump (ap, n);
printf ("b : "); mpn_dump (&b, 1);
printf ("r (expected): "); mpn_dump (&r_ref, 1);
printf ("r (bad) : "); mpn_dump (&r, 1);
abort();
}
}
int
main (int argc, char **argv)
{
gmp_randstate_ptr rands;
int i;
unsigned a_bits;
unsigned b_bits;
mpz_t a;
mpz_t b;
tests_start ();
rands = RANDS;
mpz_init (a);
mpz_init (b);
for (i = 0; i < 300; i++)
{
mp_size_t asize;
a_bits = 1 + gmp_urandomm_ui (rands, 1000);
b_bits = 1 + gmp_urandomm_ui (rands, GMP_NUMB_BITS);
mpz_rrandomb (a, rands, a_bits);
mpz_rrandomb (b, rands, b_bits);
asize = SIZ(a);
if (!asize)
asize = 1;
if (mpz_sgn (b) == 0)
mpz_set_ui (b, 1);
check_one (PTR(a), asize, PTR(b)[0]);
}
mpz_clear (a);
mpz_clear (b);
tests_end ();
return 0;
}
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