pqc/external/flint-2.4.3/test/t-smul_ppmm.c
2014-05-24 23:16:06 +02:00

102 lines
2.5 KiB
C

/*=============================================================================
This file is part of FLINT.
FLINT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
FLINT 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with FLINT; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
=============================================================================*/
/******************************************************************************
Copyright (C) 2009 William Hart
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "flint.h"
#include "ulong_extras.h"
int main(void)
{
int i, result;
FLINT_TEST_INIT(state);
flint_printf("smul_ppmm....");
fflush(stdout);
for (i = 0; i < 1000000; i++)
{
mp_limb_t ph1, pl1, ph2, pl2, pl2old, n1, n2, m1, m2, bit;
int j, sign;
n1 = n_randtest(state);
n2 = n_randtest(state);
smul_ppmm(ph1, pl1, n1, n2);
m1 = n1;
m2 = n2;
sign = 1;
if ((mp_limb_signed_t) m1 < WORD(0))
{
sign = -1;
m1 = -m1;
}
if ((mp_limb_signed_t) m2 < WORD(0))
{
sign = -sign;
m2 = -m2;
}
pl2old = UWORD(0);
pl2 = UWORD(0);
ph2 = UWORD(0);
bit = UWORD(1);
for (j = 0; j < FLINT_BITS; j++)
{
if (m2 & bit)
{
pl2 += (m1 << j);
ph2 += (pl2 < pl2old);
ph2 += r_shift(m1, FLINT_BITS - j);
pl2old = pl2;
}
bit <<= 1;
}
if (sign == -1)
sub_ddmmss(ph2, pl2, 0, 0, ph2, pl2);
result = ((ph2 == ph1) && (pl2 == pl1));
if (!result)
{
flint_printf("FAIL:\n");
flint_printf("m1 = %wu, m2 = %wu\n", n1, n2);
flint_printf("ph2 = %wu, ph1 = %wu, pl2 = %wu, pl1 = %wu\n", ph2, ph1, pl2, pl1);
abort();
}
}
FLINT_TEST_CLEANUP(state);
flint_printf("PASS\n");
return 0;
}