127 lines
3.2 KiB
C
127 lines
3.2 KiB
C
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/*=============================================================================
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This file is part of FLINT.
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FLINT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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FLINT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with FLINT; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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=============================================================================*/
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/******************************************************************************
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Copyright (C) 2012 Sebastian Pancratz
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******************************************************************************/
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/*
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Benchmarks for the p-adic exponential method, rectangular.
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We consider the set-up with p = 17, N = 2^i, i = 0, ..., 19,
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and compute the exponential of d = 17 a, a = 3^{3 N} mod p^N.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/types.h>
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#include <time.h>
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#include <unistd.h>
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#include <gmp.h>
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#include "flint.h"
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#include "fmpz.h"
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#include "padic.h"
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int
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main(void)
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{
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long l, len = 20;
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long runs[] = {
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100000000, 1000000, 1000000, 1000000, 100000,
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100000, 10000, 10000, 10000, 1000,
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100, 100, 10, 1, 1,
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1, 1, 1, 1, 1
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};
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long N[] = {
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1, 2, 4, 8, 16,
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32, 64, 128, 256, 512,
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1024, WORD(1) << 11, WORD(1) << 12, WORD(1) << 13, WORD(1) << 14,
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WORD(1) << 15, WORD(1) << 16, WORD(1) << 17, WORD(1) << 18, WORD(1) << 19
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};
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long T[20] = {0};
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flint_printf("Benchmark for p-adic exponential (rectangular).\n");
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fflush(stdout);
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for (l = 0; l < FLINT_MIN(17, len); l++)
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{
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FLINT_TEST_INIT(state);
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long n = N[l], r;
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clock_t c0, c1;
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long double cputime;
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fmpz_t p;
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padic_ctx_t ctx;
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padic_t d, z;
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fmpz_init_set_ui(p, 17);
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padic_ctx_init(ctx, p, n, n, PADIC_VAL_UNIT);
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padic_init(d);
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padic_init(z);
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if (n > 1)
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{
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fmpz_t f = {WORD(3)}, pow;
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fmpz_init(pow);
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fmpz_pow_ui(pow, p, n - 1);
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fmpz_pow_ui(padic_unit(d), f, 3 * n);
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fmpz_mod(padic_unit(d), padic_unit(d), pow);
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padic_val(d) = 1;
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fmpz_clear(pow);
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}
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c0 = clock();
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for (r = runs[l]; (r); r--)
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{
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padic_exp_rectangular(z, d, ctx);
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padic_zero(z);
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}
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c1 = clock();
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cputime = (long double) (c1 - c0) / (long double) CLOCKS_PER_SEC;
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T[l] = (slong) (cputime * (1000000000 / runs[l]));
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flint_printf("%2ld, %4XYXYXYXY, %9ld, %wd\n",
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l, cputime, runs[l], T[l]);
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padic_clear(d);
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padic_clear(z);
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fmpz_clear(p);
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padic_ctx_clear(ctx);
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flint_randclear(state);
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}
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flint_printf("Output as a list:\n");
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for (l = 0; l < len; l++)
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flint_printf("%wd, ", T[l]);
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flint_printf("\n");
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}
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