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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
250 lines
6.9 KiB
C
250 lines
6.9 KiB
C
/* Test file for mpfr_get_decimal64 and mpfr_set_decimal64.
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Copyright 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 <stdlib.h> /* for exit */
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#include "mpfr-test.h"
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/* #define DEBUG */
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#ifdef MPFR_WANT_DECIMAL_FLOATS
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static void
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print_decimal64 (_Decimal64 d)
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{
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union ieee_double_extract x;
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union ieee_double_decimal64 y;
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unsigned int Gh, i;
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y.d64 = d;
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x.d = y.d;
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Gh = x.s.exp >> 6;
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printf ("|%d%d%d%d%d%d", x.s.sig, Gh >> 4, (Gh >> 3) & 1,
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(Gh >> 2) & 1, (Gh >> 1) & 1, Gh & 1);
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printf ("%d%d%d%d%d%d", (x.s.exp >> 5) & 1, (x.s.exp >> 4) & 1,
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(x.s.exp >> 3) & 1, (x.s.exp >> 2) & 1, (x.s.exp >> 1) & 1,
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x.s.exp & 1);
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for (i = 20; i > 0; i--)
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printf ("%d", (x.s.manh >> (i - 1)) & 1);
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for (i = 32; i > 0; i--)
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printf ("%d", (x.s.manl >> (i - 1)) & 1);
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printf ("|\n");
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}
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static void
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check_inf_nan (void)
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{
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mpfr_t x, y;
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_Decimal64 d;
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mpfr_init2 (x, 123);
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mpfr_init2 (y, 123);
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mpfr_set_nan (x);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_nan_p (x));
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mpfr_set_inf (x, 1);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_inf_p (x) && mpfr_sgn (x) > 0);
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mpfr_set_inf (x, -1);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_inf_p (x) && mpfr_sgn (x) < 0);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_ui (x, 0) == 0 && MPFR_SIGN (x) > 0);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_neg (x, x, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_ui (x, 0) == 0 && MPFR_SIGN (x) < 0);
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mpfr_set_ui (x, 1, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_ui (x, 1) == 0);
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mpfr_set_si (x, -1, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_si (x, -1) == 0);
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mpfr_set_ui (x, 2, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_ui (x, 2) == 0);
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mpfr_set_ui (x, 99, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp_ui (x, 99) == 0);
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mpfr_set_str (x, "9999999999999999", 10, MPFR_RNDZ);
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mpfr_set (y, x, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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/* smallest normal number */
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mpfr_set_str (x, "1E-383", 10, MPFR_RNDU);
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mpfr_set (y, x, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDU);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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/* smallest subnormal number */
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mpfr_set_str (x, "1E-398", 10, MPFR_RNDU);
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mpfr_set (y, x, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDU);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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/* subnormal number with exponent change when we round back
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from 16 digits to 1 digit */
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mpfr_set_str (x, "9.9E-398", 10, MPFR_RNDN);
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d = mpfr_get_decimal64 (x, MPFR_RNDU); /* should be 1E-397 */
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDD);
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mpfr_set_str (y, "1E-397", 10, MPFR_RNDN);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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/* largest number */
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mpfr_set_str (x, "9.999999999999999E384", 10, MPFR_RNDZ);
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mpfr_set (y, x, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDU);
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mpfr_set_ui (x, 0, MPFR_RNDZ);
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mpfr_set_decimal64 (x, d, MPFR_RNDZ);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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mpfr_set_prec (x, 53);
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mpfr_set_prec (y, 53);
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/* largest number */
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mpfr_set_str (x, "9.999999999999999E384", 10, MPFR_RNDZ);
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d = mpfr_get_decimal64 (x, MPFR_RNDZ);
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mpfr_set_decimal64 (y, d, MPFR_RNDU);
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ASSERT_ALWAYS (mpfr_cmp (x, y) == 0);
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mpfr_clear (x);
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mpfr_clear (y);
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}
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static void
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check_random (void)
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{
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mpfr_t x, y;
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_Decimal64 d;
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int i;
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mpfr_init2 (x, 49);
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mpfr_init2 (y, 49);
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for (i = 0; i < 100000; i++)
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{
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mpfr_urandomb (x, RANDS); /* 0 <= x < 1 */
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/* the normal decimal64 range contains [2^(-1272), 2^1278] */
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mpfr_mul_2si (x, x, (i % 2550) - 1272, MPFR_RNDN);
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if (mpfr_get_exp (x) <= -1272)
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mpfr_mul_2exp (x, x, -1271 - mpfr_get_exp (x), MPFR_RNDN);
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d = mpfr_get_decimal64 (x, MPFR_RNDN);
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mpfr_set_decimal64 (y, d, MPFR_RNDN);
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if (mpfr_cmp (x, y) != 0)
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{
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printf ("x="); mpfr_dump (x);
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printf ("d="); print_decimal64 (d);
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printf ("y="); mpfr_dump (y);
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exit (1);
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}
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}
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mpfr_clear (x);
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mpfr_clear (y);
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}
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/* check with native decimal formats */
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static void
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check_native (void)
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{
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mpfr_t x;
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_Decimal64 d;
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mpfr_init2 (x, 53);
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/* check important constants are correctly converted */
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mpfr_set_ui (x, 17, MPFR_RNDN);
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d = mpfr_get_decimal64 (x, MPFR_RNDN);
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MPFR_ASSERTN(d == 17.0dd);
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mpfr_set_ui (x, 42, MPFR_RNDN);
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d = mpfr_get_decimal64 (x, MPFR_RNDN);
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MPFR_ASSERTN(d == 42.0dd);
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mpfr_set_decimal64 (x, 17.0dd, MPFR_RNDN);
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MPFR_ASSERTN(mpfr_cmp_ui (x, 17) == 0);
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mpfr_set_decimal64 (x, 42.0dd, MPFR_RNDN);
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MPFR_ASSERTN(mpfr_cmp_ui (x, 42) == 0);
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mpfr_clear (x);
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}
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#endif /* MPFR_WANT_DECIMAL_FLOATS */
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int
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main (void)
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{
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tests_start_mpfr ();
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mpfr_test_init ();
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#ifdef MPFR_WANT_DECIMAL_FLOATS
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#ifdef DEBUG
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#ifdef DPD_FORMAT
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printf ("Using DPD format\n");
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#else
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printf ("Using BID format\n");
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#endif
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#endif
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check_inf_nan ();
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check_random ();
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check_native ();
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#endif
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tests_end_mpfr ();
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return 0;
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}
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