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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
263 lines
7.0 KiB
C
263 lines
7.0 KiB
C
/* Test file for mpfr_ui_pow and mpfr_ui_pow_ui.
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Copyright 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 <limits.h>
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#include "mpfr-test.h"
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static void
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test1 (void)
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{
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mpfr_t x, y, z, a;
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int res1, res2;
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mpfr_init2 (x, 32);
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mpfr_init2 (y, 65);
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mpfr_init2 (z, 17);
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mpfr_init2 (a, 17);
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mpfr_set_str_binary (x, "-0.101110001001011011011e-9");
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mpfr_ui_pow (y, 7, x, MPFR_RNDN);
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mpfr_set_prec (x, 40);
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mpfr_set_str_binary (x, "-0.1100101100101111011001010010110011110110E-1");
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mpfr_set_prec (y, 74);
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mpfr_ui_pow (y, 8, x, MPFR_RNDN);
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mpfr_set_prec (x, 74);
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mpfr_set_str_binary (x, "0.11100000010100111101000011111011011010011000011000101011010011010101000011E-1");
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if (mpfr_cmp (x, y))
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{
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printf ("Error for input of 40 bits, output of 74 bits\n");
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exit (1);
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}
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/* Check for ui_pow_ui */
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mpfr_ui_pow_ui (x, 0, 1, MPFR_RNDN);
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MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x));
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mpfr_ui_pow_ui (x, 0, 4, MPFR_RNDN);
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MPFR_ASSERTN(mpfr_cmp_ui (x, 0) == 0 && MPFR_IS_POS (x));
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res1 = mpfr_ui_pow_ui (z, 17, 42, MPFR_RNDD);
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mpfr_set_ui (x, 17, MPFR_RNDN);
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mpfr_set_ui (y, 42, MPFR_RNDN);
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res2 = mpfr_pow (a, x, y, MPFR_RNDD);
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if (mpfr_cmp (z, a) || res1 != res2)
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{
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printf ("Error for ui_pow_ui for 17^42\n"
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"Inexact1 = %d Inexact2 = %d\n", res1, res2);
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mpfr_dump (z);
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mpfr_dump (a);
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exit (1);
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}
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mpfr_set_prec (x, 2);
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mpfr_ui_pow_ui (x, 65537, 65535, MPFR_RNDN);
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if (mpfr_cmp_str (x, "0.11E1048562", 2, MPFR_RNDN) != 0)
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{
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printf ("Error for ui_pow_ui for 65537 ^65535 with 2 bits of precision\n");
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mpfr_dump (x);
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exit (1);
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}
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mpfr_clear (x);
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mpfr_clear (y);
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mpfr_clear (z);
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mpfr_clear (a);
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}
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static void
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check1 (mpfr_ptr x, mpfr_prec_t prec, unsigned long nt, mpfr_rnd_t rnd)
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{
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mpfr_t y, z, t;
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int inexact, compare, compare2;
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mpfr_prec_t yprec;
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mpfr_exp_t err;
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yprec = prec + 10;
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mpfr_init (y);
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mpfr_init (z);
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mpfr_init (t);
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mpfr_set_prec (y, yprec);
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mpfr_set_prec (z, prec);
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mpfr_set_prec (t, prec);
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compare = mpfr_ui_pow (y, nt, x, rnd);
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err = (rnd == MPFR_RNDN) ? yprec + 1 : yprec;
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if (mpfr_can_round (y, err, rnd, rnd, prec))
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{
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mpfr_set (t, y, rnd);
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inexact = mpfr_ui_pow (z, nt, x, rnd);
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if (mpfr_cmp (t, z))
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{
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printf ("results differ for x=");
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mpfr_out_str (stdout, 2, prec, x, MPFR_RNDN);
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printf (" n=%lu", nt);
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printf (" prec=%u rnd_mode=%s\n", (unsigned) prec,
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mpfr_print_rnd_mode (rnd));
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printf ("got ");
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mpfr_out_str (stdout, 2, prec, z, MPFR_RNDN);
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puts ("");
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printf ("expected ");
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mpfr_out_str (stdout, 2, prec, t, MPFR_RNDN);
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puts ("");
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printf ("approx ");
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mpfr_print_binary (y);
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puts ("");
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exit (1);
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}
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compare2 = mpfr_cmp (t, y);
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/* if rounding to nearest, cannot know the sign of t - f(x)
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because of composed rounding: y = o(f(x)) and t = o(y) */
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if ((rnd != MPFR_RNDN) && (compare * compare2 >= 0))
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compare = compare + compare2;
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else
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compare = inexact; /* cannot determine sign(t-f(x)) */
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if (((inexact == 0) && (compare != 0)) ||
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((inexact > 0) && (compare <= 0)) ||
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((inexact < 0) && (compare >= 0)))
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{
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printf ("Wrong inexact flag for rnd=%s: expected %d, got %d\n",
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mpfr_print_rnd_mode (rnd), compare, inexact);
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printf ("x="); mpfr_print_binary (x); puts ("");
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printf ("y="); mpfr_print_binary (y); puts ("");
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printf ("t="); mpfr_print_binary (t); puts ("");
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exit (1);
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}
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}
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mpfr_clear (y);
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mpfr_clear (z);
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mpfr_clear (t);
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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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mpfr_t x, y;
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unsigned long int n;
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tests_start_mpfr ();
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mpfr_init (x);
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mpfr_init (y);
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n = randlimb ();
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MPFR_SET_INF(x);
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mpfr_ui_pow (y, n, x, MPFR_RNDN);
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if(!MPFR_IS_INF(y))
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{
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printf ("evaluation of function in INF does not return INF\n");
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exit (1);
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}
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MPFR_CHANGE_SIGN(x);
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mpfr_ui_pow (y, n, x, MPFR_RNDN);
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if(!MPFR_IS_ZERO(y))
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{
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printf ("evaluation of function in -INF does not return 0");
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exit (1);
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}
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MPFR_SET_NAN(x);
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mpfr_ui_pow (y, n, x, MPFR_RNDN);
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if(!MPFR_IS_NAN(y))
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{
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printf ("evaluation of function in NAN does not return NAN");
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exit (1);
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}
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test1 ();
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{
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mpfr_t z, t;
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mpfr_prec_t prec;
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mpfr_rnd_t rnd;
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unsigned int n;
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mpfr_prec_t p0=2, p1=100;
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unsigned int N=20;
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mpfr_init2 (z, 38);
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mpfr_init2 (t, 6);
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/* check exact power */
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mpfr_set_str_binary (t, "0.110000E5");
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mpfr_ui_pow (z, 3, t, MPFR_RNDN);
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mpfr_set_prec (x, 2);
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mpfr_set_prec (y, 2);
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mpfr_set_str (x, "-0.5", 10, MPFR_RNDZ);
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mpfr_ui_pow (y, 4, x, MPFR_RNDD);
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if (mpfr_cmp_ui_2exp(y, 1, -1))
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{
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fprintf (stderr, "Error for 4^(-0.5), prec=2, MPFR_RNDD\n");
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fprintf (stderr, "expected 0.5, got ");
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mpfr_out_str (stderr, 2, 0, y, MPFR_RNDN);
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fprintf (stderr, "\n");
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exit (1);
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}
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/* problem found by Kevin on spe175.testdrive.compaq.com
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(03 Sep 2003) */
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mpfr_set_prec (x, 2);
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mpfr_set_prec (y, 2);
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mpfr_set_str (x, "0.5", 10, MPFR_RNDN);
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mpfr_ui_pow (y, 398441521, x, MPFR_RNDN);
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if (mpfr_cmp_ui_2exp(y, 1, 14))
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{
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fprintf (stderr, "Error for 398441521^(0.5), prec=2, MPFR_RNDN\n");
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fprintf (stderr, "expected 1.0e14, got ");
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mpfr_out_str (stderr, 2, 0, y, MPFR_RNDN);
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fprintf (stderr, "\n");
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exit (1);
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}
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mpfr_clear (z);
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mpfr_clear (t);
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mpfr_set_prec (x, 2);
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mpfr_set_str (x, "0.5", 10, MPFR_RNDN);
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check1 (x, 2, 398441521, MPFR_RNDN); /* 398441521 = 19961^2 */
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/* generic test */
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for (prec = p0; prec <= p1; prec++)
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{
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mpfr_set_prec (x, prec);
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for (n=0; n<N; n++)
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{
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int nt;
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nt = randlimb () & INT_MAX;
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mpfr_urandomb (x, RANDS);
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rnd = RND_RAND ();
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check1 (x, prec, nt, rnd);
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}
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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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tests_end_mpfr ();
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return 0;
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}
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