mirror of
https://github.com/vale981/arb
synced 2025-03-06 01:41:39 -05:00
123 lines
3.6 KiB
C
123 lines
3.6 KiB
C
/*=============================================================================
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This file is part of ARB.
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ARB 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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ARB 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 ARB; 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) 2013 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 "elefun.h"
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int main()
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{
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long iter;
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flint_rand_t state;
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printf("exp_fixed_precomp....");
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fflush(stdout);
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flint_randinit(state);
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for (iter = 0; iter < 100000; iter++)
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{
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long prec, prec2;
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fmpz_t y, yerr, exponent, x, xerr;
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fmpr_t ya, yb, xa, xb, t, u;
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prec = 2 + n_randint(state, 1000);
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prec2 = prec + 30;
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fmpz_init(x);
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fmpz_init(xerr);
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fmpz_init(y);
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fmpz_init(yerr);
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fmpz_init(exponent);
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fmpr_init(ya);
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fmpr_init(yb);
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fmpr_init(xa);
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fmpr_init(xb);
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fmpr_init(t);
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fmpr_init(u);
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fmpz_randtest(x, state, prec + 20);
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fmpz_randtest_unsigned(xerr, state, prec + 10);
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fmpz_randtest(y, state, 1500);
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fmpz_randtest(yerr, state, 1500);
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fmpz_randtest(exponent, state, 1500);
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elefun_exp_fixed_precomp(y, yerr, exponent, x, xerr, prec);
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fmpr_set_fmpz(t, x);
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fmpr_mul_2exp_si(t, t, -prec);
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fmpr_set_fmpz(u, xerr);
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fmpr_mul_2exp_si(u, u, -prec);
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fmpr_sub(xa, t, u, FMPR_PREC_EXACT, FMPR_RND_FLOOR);
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fmpr_add(xb, t, u, FMPR_PREC_EXACT, FMPR_RND_CEIL);
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fmpr_set_fmpz(t, y);
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fmpr_mul_2exp_si(t, t, -prec);
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fmpr_mul_2exp_fmpz(t, t, exponent);
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fmpr_set_fmpz(u, yerr);
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fmpr_mul_2exp_si(u, u, -prec);
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fmpr_mul_2exp_fmpz(u, u, exponent);
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fmpr_sub(ya, t, u, FMPR_PREC_EXACT, FMPR_RND_FLOOR);
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fmpr_add(yb, t, u, FMPR_PREC_EXACT, FMPR_RND_CEIL);
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fmpr_exp(t, xa, prec2, FMPR_RND_FLOOR);
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fmpr_exp(u, xb, prec2, FMPR_RND_CEIL);
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if (!(fmpr_cmp(ya, t) < 0 && fmpr_cmp(t, yb) < 0))
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{
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printf("FAIL (bounds)\n");
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printf("prec = %ld\n", prec);
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printf("xa = "); fmpr_printd(xa, 50); printf("\n");
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printf("xb = "); fmpr_printd(xb, 50); printf("\n");
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printf("ya = "); fmpr_printd(ya, 50); printf("\n");
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printf("yb = "); fmpr_printd(yb, 50); printf("\n");
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printf("exp(xa) = "); fmpr_printd(t, 50); printf("\n");
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printf("exp(xb) = "); fmpr_printd(u, 50); printf("\n");
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abort();
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}
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fmpz_clear(x);
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fmpz_clear(xerr);
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fmpz_clear(y);
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fmpz_clear(yerr);
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fmpz_clear(exponent);
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fmpr_clear(ya);
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fmpr_clear(yb);
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fmpr_clear(xa);
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fmpr_clear(xb);
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fmpr_clear(t);
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fmpr_clear(u);
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}
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flint_randclear(state);
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flint_cleanup();
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printf("PASS\n");
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return EXIT_SUCCESS;
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}
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