113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/* Test mpf_set, mpf_init_set.
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Copyright 2004, 2012 Free Software Foundation, Inc.
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This file is part of the GNU MP Library test suite.
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The GNU MP Library test suite is free software; you can redistribute it
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and/or modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 3 of the License,
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or (at your option) any later version.
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The GNU MP Library test suite is distributed in the hope that it will be
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useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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Public License for more details.
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You should have received a copy of the GNU General Public License along with
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the GNU MP Library test suite. If not, see https://www.gnu.org/licenses/. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "gmp-impl.h"
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#include "tests.h"
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void
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check_reuse (void)
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{
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/* Try mpf_set(f,f) when f is bigger than prec. In the past this had
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resulted in an MPN_COPY with invalid operand overlap. */
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mpf_t f;
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mp_size_t limbs = 20;
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unsigned long bits = limbs * GMP_NUMB_BITS;
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mpf_init2 (f, bits);
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refmpf_fill (f, limbs, GMP_NUMB_MAX);
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mpf_set_prec_raw (f, bits / 2);
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mpf_set (f, f);
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MPF_CHECK_FORMAT (f);
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mpf_set_prec_raw (f, bits);
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mpf_clear (f);
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}
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void
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check_random (long reps)
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{
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unsigned long test;
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gmp_randstate_ptr rands;
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mpf_t a, b;
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mpz_t z;
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int precbits;
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#define PRECBITS 10
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rands = RANDS;
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mpz_init (z);
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mpf_init2 (a, 1 << PRECBITS);
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for (test = 0; test < reps; test++)
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{
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mpz_urandomb (z, rands, PRECBITS + 1);
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precbits = mpz_get_ui (z) + 1;
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mpz_urandomb (z, rands, precbits);
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mpz_setbit (z, precbits - 1); /* make sure msb is set */
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mpf_set_z (a, z);
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if (precbits & 1)
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mpf_neg (a, a);
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mpz_urandomb (z, rands, PRECBITS);
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mpf_div_2exp (a, a, mpz_get_ui (z) + 1);
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mpz_urandomb (z, rands, PRECBITS);
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precbits -= mpz_get_ui (z);
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if (precbits <= 0)
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precbits = 1 - precbits;
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mpf_set_default_prec (precbits);
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mpf_init_set (b, a);
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MPF_CHECK_FORMAT (b);
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if (!mpf_eq (a, b, precbits))
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{
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printf ("mpf_init_set wrong.\n");
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abort();
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}
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mpf_set_ui (b, 0);
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mpf_set (b, a);
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MPF_CHECK_FORMAT (b);
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if (!mpf_eq (a, b, precbits))
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{
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printf ("mpf_set wrong.\n");
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abort();
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}
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mpf_clear (b);
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}
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mpf_clear (a);
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mpz_clear (z);
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}
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int
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main (int argc, char *argv[])
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{
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long reps = 10000;
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tests_start ();
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TESTS_REPS (reps, argv, argc);
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check_reuse ();
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check_random (reps);
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tests_end ();
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exit (0);
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}
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