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https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
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147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
/*
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Copyright 2012, 2013 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 http://www.gnu.org/licenses/. */
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#include <limits.h>
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#include <math.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "testutils.h"
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#define GMP_LIMB_BITS (sizeof(mp_limb_t) * CHAR_BIT)
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#define COUNT 10000
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static void
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dump (const char *label, const mpz_t x)
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{
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char *buf = mpz_get_str (NULL, 16, x);
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fprintf (stderr, "%s: %s\n", label, buf);
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testfree (buf);
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}
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static const struct
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{
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double d;
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const char *s;
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} values[] = {
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{ 0.0, "0" },
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{ 0.3, "0" },
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{ -0.3, "0" },
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{ M_PI, "3" },
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{ M_PI*1e15, "b29430a256d21" },
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{ -M_PI*1e15, "-b29430a256d21" },
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/* 17 * 2^{200} =
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27317946752402834684213355569799764242877450894307478200123392 */
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{0.2731794675240283468421335556979976424288e62,
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"1100000000000000000000000000000000000000000000000000" },
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{ 0.0, NULL }
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};
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void
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testmain (int argc, char **argv)
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{
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unsigned i;
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mpz_t x;
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for (i = 0; values[i].s; i++)
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{
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char *s;
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mpz_init_set_d (x, values[i].d);
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s = mpz_get_str (NULL, 16, x);
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if (strcmp (s, values[i].s) != 0)
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{
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fprintf (stderr, "mpz_set_d failed:\n"
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"d = %.20g\n"
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"s = %s\n"
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"r = %s\n",
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values[i].d, s, values[i].s);
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abort ();
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}
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testfree (s);
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mpz_clear (x);
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}
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mpz_init (x);
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for (i = 0; i < COUNT; i++)
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{
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/* Use volatile, to avoid extended precision in floating point
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registers, e.g., on m68k and 80387. */
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volatile double d, f;
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unsigned long m;
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int e;
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mini_rrandomb (x, GMP_LIMB_BITS);
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m = mpz_get_ui (x);
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mini_urandomb (x, 8);
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e = mpz_get_ui (x) - 100;
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d = ldexp ((double) m, e);
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mpz_set_d (x, d);
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f = mpz_get_d (x);
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if (f != floor (d))
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{
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fprintf (stderr, "mpz_set_d/mpz_get_d failed:\n");
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goto dumperror;
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}
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if ((f == d) ? (mpz_cmp_d (x, d) != 0) : (mpz_cmp_d (x, d) >= 0))
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{
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fprintf (stderr, "mpz_cmp_d (x, d) failed:\n");
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goto dumperror;
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}
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f = d + 1.0;
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if (f > d && ! (mpz_cmp_d (x, f) < 0))
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{
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fprintf (stderr, "mpz_cmp_d (x, f) failed:\n");
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goto dumperror;
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}
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d = - d;
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mpz_set_d (x, d);
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f = mpz_get_d (x);
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if (f != ceil (d))
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{
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fprintf (stderr, "mpz_set_d/mpz_get_d failed:\n");
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dumperror:
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dump ("x", x);
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fprintf (stderr, "m = %lx, e = %i\n", m, e);
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fprintf (stderr, "d = %.15g\n", d);
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fprintf (stderr, "f = %.15g\n", f);
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fprintf (stderr, "f - d = %.5g\n", f - d);
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abort ();
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}
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if ((f == d) ? (mpz_cmp_d (x, d) != 0) : (mpz_cmp_d (x, d) <= 0))
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{
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fprintf (stderr, "mpz_cmp_d (x, d) failed:\n");
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goto dumperror;
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}
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f = d - 1.0;
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if (f < d && ! (mpz_cmp_d (x, f) > 0))
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{
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fprintf (stderr, "mpz_cmp_d (x, f) failed:\n");
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goto dumperror;
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}
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}
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mpz_clear (x);
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}
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