pqc/external/flint-2.4.3/profile/p-udiv_qrnnd_preinv.c
2014-05-24 23:16:06 +02:00

85 lines
2.3 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 2009 William Hart
******************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>
#include "profiler.h"
#include "flint.h"
#include "ulong_extras.h"
void sample(void * arg, ulong count)
{
mp_limb_t d, q, r, dinv, norm;
mp_ptr array = (mp_ptr) flint_malloc(200 * sizeof(mp_limb_t));
FLINT_TEST_INIT(state);
ulong i;
int j;
d = n_randtest_not_zero(state);
count_leading_zeros(norm, d);
d <<= norm;
for (i = 0; i < count; i++)
{
for (j = 0; j < 200; j+=2)
{
do
{
array[j] = n_randtest(state);
} while (array[j] >= d);
array[j + 1] = n_randtest(state);
}
invert_limb(dinv, d);
prof_start();
for (j = 0; j < 200; j+=2)
{
udiv_qrnnd_preinv(q, r, array[j], array[j+1], d, dinv);
}
prof_stop();
if (q + r == 0) flint_printf("\r");
}
flint_randclear(state);
flint_free(array);
}
int main(void)
{
double min, max;
prof_repeat(&min, &max, sample, NULL);
flint_printf("udiv_qrnnd_preinv min time is %.3f cycles, max time is %.3f cycles\n",
(min/(double)FLINT_CLOCK_SCALE_FACTOR)/100, (max/(double)FLINT_CLOCK_SCALE_FACTOR)/100);
return 0;
}