155 lines
4.1 KiB
C
155 lines
4.1 KiB
C
/*=============================================================================
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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 "flint.h"
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#include "fmpz.h"
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#include "fmpq.h"
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#include "ulong_extras.h"
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int
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main(void)
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{
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int i;
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FLINT_TEST_INIT(state);
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flint_printf("div_2exp....");
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fflush(stdout);
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/* x = y * 2^exp */
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for (i = 0; i < 10000; i++)
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{
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fmpq_t x, y;
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mpq_t X, Y;
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mp_bitcnt_t c;
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fmpq_init(x);
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fmpq_init(y);
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mpq_init(X);
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mpq_init(Y);
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fmpq_randtest(x, state, 200);
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fmpq_randtest(y, state, 200);
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if (n_randint(state, 5) == 0)
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fmpz_mul_2exp(fmpq_numref(y), fmpq_numref(y), n_randint(state, 200));
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else if (n_randint(state, 5) == 0)
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fmpz_mul_2exp(fmpq_denref(y), fmpq_denref(y), n_randint(state, 200));
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fmpq_canonicalise(y);
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c = n_randint(state, 200);
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fmpq_div_2exp(x, y, c);
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if (!fmpq_is_canonical(x))
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{
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flint_printf("FAIL: result not canonical!\n");
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flint_printf("x = ");
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fmpq_print(x);
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flint_printf("\ny = ");
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fmpq_print(y);
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flint_printf("\nc = %wu\n", c);
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abort();
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}
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fmpq_get_mpq(X, x);
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fmpq_get_mpq(Y, y);
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mpq_div_2exp(X, Y, c);
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fmpq_get_mpq(Y, x);
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if (!mpq_equal(X, Y))
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{
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flint_printf("FAIL: fmpq_div_2exp(x,y,c) != mpq_div_2exp(X,Y,c)\n");
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flint_printf("x = ");
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fmpq_print(x);
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flint_printf("\ny = ");
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fmpq_print(y);
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flint_printf("\n");
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abort();
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}
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fmpq_clear(x);
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fmpq_clear(y);
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mpq_clear(X);
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mpq_clear(Y);
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}
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/* y = y * 2^exp */
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for (i = 0; i < 10000; i++)
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{
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fmpq_t x, y;
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mp_bitcnt_t c;
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fmpq_init(x);
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fmpq_init(y);
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fmpq_randtest(x, state, 200);
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fmpq_randtest(y, state, 200);
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if (n_randint(state, 5) == 0)
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fmpz_mul_2exp(fmpq_numref(y), fmpq_numref(y), n_randint(state, 200));
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else if (n_randint(state, 5) == 0)
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fmpz_mul_2exp(fmpq_denref(y), fmpq_denref(y), n_randint(state, 200));
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fmpq_canonicalise(y);
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c = n_randint(state, 200);
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fmpq_div_2exp(x, y, c);
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fmpq_div_2exp(y, y, c);
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if (!fmpq_is_canonical(y))
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{
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flint_printf("FAIL: result not canonical!\n");
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flint_printf("x = ");
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fmpq_print(x);
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flint_printf("\ny = ");
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fmpq_print(y);
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flint_printf("\nc = %wu\n", c);
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abort();
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}
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if (!fmpq_equal(x, y))
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{
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flint_printf("FAIL: fmpq_div_2exp(x,y,c) != fmpq_div_2exp(y,y,c)\n");
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flint_printf("x = ");
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fmpq_print(x);
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flint_printf("\ny = ");
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fmpq_print(y);
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flint_printf("\nc = %wu\n", c);
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abort();
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}
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fmpq_clear(x);
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fmpq_clear(y);
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}
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FLINT_TEST_CLEANUP(state);
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flint_printf("PASS\n");
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return 0;
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}
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