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/*
Copyright (C) 2015 Kushagra Singh
This file is part of FLINT.
FLINT is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License (LGPL) as published
by the Free Software Foundation; either version 3 of the License, or
(at your option) any later version. See <https://www.gnu.org/licenses/>.
*/
#include "test_helpers.h"
#include "ulong_extras.h"
#include "mpn_extras.h"
#include "fmpz.h"
TEST_FUNCTION_START(fmpz_get_mpn, state)
{
fmpz_t a, b, mmin;
int i, j, k;
nn_ptr mpna;
fmpz_init(a);
fmpz_init(b);
fmpz_init(mmin);
for (i = 0; i < 100; i++)
{
fmpz_set_ui(mmin, 1);
fmpz_mul_2exp(mmin, mmin, i * FLINT_BITS);
for (j = 0; j < 100; j++)
{
fmpz_set_ui(b, 0);
k = n_randint(state, FLINT_BITS);
k += 1; /* 1 <= k <= FLINT_BITS */
k += (i * FLINT_BITS); /* 2^(i*FLINT_BITS) + 1 <= k <= 2^((i + 1)*FLINT_BITS) */
fmpz_randtest_unsigned(a, state, k);
fmpz_add(a, a, mmin);
k = fmpz_get_mpn(&mpna, a);
while (k != 0)
{
fmpz_add_ui(b, b, mpna[k - 1]);
if (k > 1)
fmpz_mul_2exp(b, b, FLINT_BITS);
k--;
}
if (fmpz_cmp(a, b))
{
printf("conversion failed.\nn : ");
fmpz_print(a);
printf("\nconverted value : ");
fmpz_print(b);
printf("\n");
fflush(stdout);
flint_abort();
}
flint_free(mpna);
}
}
/* regression test */
{
#if FLINT_BITS == 32
slong ksave;
ulong limb0, limb1;
fmpz_set_ui(a, 524287);
fmpz_mul_2exp(a, a, FLINT_BITS);
fmpz_add_ui(a, a, 4294443520);
fmpz_zero(b);
k = fmpz_get_mpn(&mpna, a);
ksave = k;
limb0 = mpna[0];
limb1 = mpna[1];
while (k != 0)
{
fmpz_add_ui(b, b, mpna[k - 1]);
if (k > 1)
fmpz_mul_2exp(b, b, FLINT_BITS);
k--;
}
if (fmpz_cmp(a, b))
{
flint_printf("limb0 = %wu, limb1 = %wu, k = %wd\n", limb0, limb1, k);
printf("conversion failed.\nn : ");
fmpz_print(a);
printf("\nconverted value : ");
fmpz_print(b);
printf("\n");
fflush(stdout);
flint_abort();
}
flint_free(mpna);
#endif
}
fmpz_clear(a);
fmpz_clear(b);
fmpz_clear(mmin);
TEST_FUNCTION_END(state);
}