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b58ddff026
* merged mpfr 3.0.0 and gmp 5.0.1 in buildtools trunk git-svn-id: file:///srv/svn/repos/haiku/buildtools/trunk@37378 a95241bf-73f2-0310-859d-f6bbb57e9c96
128 lines
3.9 KiB
C
128 lines
3.9 KiB
C
/* Test file for mpfr_can_round.
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Copyright 1999, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
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Contributed by the Arenaire and Cacao projects, INRIA.
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This file is part of the GNU MPFR Library.
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The GNU MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at your
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option) any later version.
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The GNU MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MPFR Library; see the file COPYING.LESSER. If not, see
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http://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
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51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
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#include <stdio.h>
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#include <stdlib.h>
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#include "mpfr-test.h"
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#define MAX_LIMB_SIZE 100
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static void
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check_round_p (void)
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{
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mp_limb_t buf[MAX_LIMB_SIZE];
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mp_size_t n, i;
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mpfr_prec_t p;
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mpfr_exp_t err;
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int r1, r2;
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for (n = 2 ; n <= MAX_LIMB_SIZE ; n++)
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{
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/* avoid mpn_random which leaks memory */
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for (i = 0; i < n; i++)
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buf[i] = randlimb ();
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p = (mpfr_prec_t) randlimb() % ((n-1) * GMP_NUMB_BITS) + MPFR_PREC_MIN;
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err = p + randlimb () % GMP_NUMB_BITS;
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r1 = mpfr_round_p (buf, n, err, p);
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r2 = mpfr_can_round_raw (buf, n, MPFR_SIGN_POS, err,
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MPFR_RNDN, MPFR_RNDZ, p);
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if (r1 != r2)
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{
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printf ("mpfr_round_p(%d) != mpfr_can_round(%d)!\n"
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"bn = %ld, err0 = %ld, prec = %lu\nbp = ",
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r1, r2, n, err, (unsigned long) p);
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gmp_printf ("%NX\n", buf, n);
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exit (1);
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}
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}
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}
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int
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main (void)
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{
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mpfr_t x;
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mpfr_prec_t i, j;
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tests_start_mpfr ();
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/* checks that rounds to nearest sets the last
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bit to zero in case of equal distance */
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mpfr_init2 (x, 59);
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mpfr_set_str_binary (x, "-0.10010001010111000011110010111010111110000000111101100111111E663");
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if (mpfr_can_round (x, 54, MPFR_RNDZ, MPFR_RNDZ, 53) != 0)
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{
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printf ("Error (1) in mpfr_can_round\n");
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exit (1);
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}
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mpfr_set_str_binary (x, "-Inf");
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if (mpfr_can_round (x, 2000, MPFR_RNDZ, MPFR_RNDZ, 2000) != 0)
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{
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printf ("Error (2) in mpfr_can_round\n");
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exit (1);
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}
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mpfr_set_prec (x, 64);
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mpfr_set_str_binary (x, "0.1011001000011110000110000110001111101011000010001110011000000000");
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if (mpfr_can_round (x, 65, MPFR_RNDN, MPFR_RNDN, 54))
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{
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printf ("Error (3) in mpfr_can_round\n");
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exit (1);
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}
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mpfr_set_prec (x, 137);
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mpfr_set_str_binary (x, "-0.10111001101001010110011000110100111010011101101010010100101100001110000100111111011101010110001010111100100101110111100001000010000000000E-97");
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if (mpfr_can_round (x, 132, MPFR_RNDU, MPFR_RNDZ, 128) == 0)
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{
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printf ("Error (4) in mpfr_can_round\n");
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exit (1);
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}
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/* in the following, we can round but cannot determine the inexact flag */
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mpfr_set_prec (x, 86);
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mpfr_set_str_binary (x, "-0.11100100010011001111011010100111101010011000000000000000000000000000000000000000000000E-80");
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if (mpfr_can_round (x, 81, MPFR_RNDU, MPFR_RNDZ, 44) == 0)
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{
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printf ("Error (5) in mpfr_can_round\n");
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exit (1);
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}
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mpfr_set_prec (x, 62);
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mpfr_set_str (x, "0.ff4ca619c76ba69", 16, MPFR_RNDZ);
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for (i = 30; i < 99; i++)
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for (j = 30; j < 99; j++)
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{
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int r1, r2;
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for (r1 = 0; r1 < MPFR_RND_MAX ; r1++)
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for (r2 = 0; r2 < MPFR_RND_MAX ; r2++)
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mpfr_can_round (x, i, (mpfr_rnd_t) r1, (mpfr_rnd_t) r2, j); /* test for assertions */
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}
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mpfr_clear (x);
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check_round_p ();
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tests_end_mpfr ();
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return 0;
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}
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