90 lines
2.3 KiB
C
90 lines
2.3 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) 2011 Fredrik Johansson
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******************************************************************************/
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmp.h>
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#include <mpfr.h>
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#include "flint.h"
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#include "ulong_extras.h"
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#include "fmpz.h"
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int
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main(void)
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{
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int i, result;
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FLINT_TEST_INIT(state);
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flint_printf("dlog....");
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fflush(stdout);
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for (i = 0; i < 1000 * flint_test_multiplier(); i++)
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{
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fmpz_t x;
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mpz_t z;
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mpfr_t r;
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double y, w;
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fmpz_init(x);
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mpz_init(z);
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mpfr_init2(r, 53);
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fmpz_randtest_not_zero(x, state, 10000);
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fmpz_abs(x, x);
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y = fmpz_dlog(x);
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fmpz_get_mpz(z, x);
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mpfr_set_z(r, z, MPFR_RNDN);
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mpfr_log(r, r, MPFR_RNDN);
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w = mpfr_get_d(r, MPFR_RNDN);
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result = (FLINT_ABS(y - w) <= w * 1e-13);
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if (!result)
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{
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flint_printf("FAIL:\n");
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flint_printf("x = "), fmpz_print(x), flint_printf("\n");
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flint_printf("y = %.20g\n", y);
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flint_printf("w = %.20g\n", w);
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abort();
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}
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fmpz_clear(x);
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mpz_clear(z);
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mpfr_clear(r);
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}
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mpfr_free_cache();
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return EXIT_SUCCESS;
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}
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