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/*
Copyright (C) 2009, 2015 William Hart
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"
TEST_FUNCTION_START(n_divrem2_preinv, state)
{
int i, result;
for (i = 0; i < 100000 * flint_test_multiplier(); i++)
{
ulong d, dinv, n, q1, q2, r1, r2, norm;
d = n_randtest_not_zero(state);
n = n_randtest(state);
norm = flint_clz(d);
dinv = n_preinvert_limb_prenorm(d << norm);
switch (i % 3)
{
case 0:
r1 = n_divrem2_preinv(&q1, n, d, dinv);
break;
case 1:
if (norm == 0)
r1 = n_divrem_norm(&q1, n, d);
else
r1 = n_divrem_preinv_unnorm(&q1, n, d, dinv, norm);
break;
default:
r1 = n_divrem_preinv(&q1, n, d, dinv, norm);
break;
}
q2 = n / d;
r2 = n % d;
result = (q1 == q2 && r1 == r2);
if (!result)
TEST_FUNCTION_FAIL(
"i = %d, n = %wu, d = %wu, dinv = %wu\n"
"q1 = %wu, q2 = %wu\n"
"r1 = %wu, r2 = %wu\n",
i, n, d, dinv, q1, q2, r1, r2);
}
TEST_FUNCTION_END(state);
}