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Annotation of OpenXM_contrib/gmp/mpfr/tests/tpow.c, Revision 1.1

1.1     ! ohara       1: /* Test file for mpfr_pow and mpfr_pow_ui.
        !             2:
        !             3: Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Lesser General Public License as published by
        !             9: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The MPFR Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Lesser General Public License
        !            18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include <stdio.h>
        !            23: #include <stdlib.h>
        !            24: #include "gmp.h"
        !            25: #include "mpfr.h"
        !            26: #include "mpfr-impl.h"
        !            27: #include "mpfr-test.h"
        !            28:
        !            29: void check_pow_ui _PROTO ((void));
        !            30: void check_inexact _PROTO ((mp_prec_t));
        !            31:
        !            32: void
        !            33: check_pow_ui (void)
        !            34: {
        !            35:   mpfr_t a, b;
        !            36:
        !            37:   mpfr_init2 (a, 53);
        !            38:   mpfr_init2 (b, 53);
        !            39:
        !            40:   /* check in-place operations */
        !            41:   mpfr_set_d (b, 0.6926773, GMP_RNDN);
        !            42:   mpfr_pow_ui (a, b, 10, GMP_RNDN);
        !            43:   mpfr_pow_ui (b, b, 10, GMP_RNDN);
        !            44:   if (mpfr_cmp (a, b)) {
        !            45:     fprintf (stderr, "Error for mpfr_pow_ui (b, b, ...)\n"); exit (1);
        !            46:   }
        !            47:
        !            48:   /* check large exponents */
        !            49:   mpfr_set_d (b, 1, GMP_RNDN);
        !            50:   mpfr_pow_ui (a, b, 4294967295UL, GMP_RNDN);
        !            51:
        !            52:   mpfr_set_inf (a, -1);
        !            53:   mpfr_pow_ui (a, a, 4049053855UL, GMP_RNDN);
        !            54:   if (!mpfr_inf_p (a) || (mpfr_sgn (a) >= 0))
        !            55:     {
        !            56:       fprintf (stderr, "Error for (-Inf)^4049053855\n");
        !            57:       exit (1);
        !            58:     }
        !            59:
        !            60:   mpfr_set_inf (a, -1);
        !            61:   mpfr_pow_ui (a, a, (unsigned long) 30002752, GMP_RNDN);
        !            62:   if (!mpfr_inf_p (a) || (mpfr_sgn (a) <= 0))
        !            63:     {
        !            64:       fprintf (stderr, "Error for (-Inf)^30002752\n");
        !            65:       exit (1);
        !            66:     }
        !            67:
        !            68:   mpfr_clear (a);
        !            69:   mpfr_clear (b);
        !            70: }
        !            71:
        !            72: void
        !            73: check_inexact (mp_prec_t p)
        !            74: {
        !            75:   mpfr_t x, y, z, t;
        !            76:   unsigned long u;
        !            77:   mp_prec_t q;
        !            78:   int inexact, cmp;
        !            79:   mp_rnd_t rnd;
        !            80:
        !            81:   mpfr_init2 (x, p);
        !            82:   mpfr_init (y);
        !            83:   mpfr_init (z);
        !            84:   mpfr_init (t);
        !            85:   mpfr_random (x);
        !            86:   u = LONG_RAND() % 2;
        !            87:   for (q=2; q<=p; q++)
        !            88:     for (rnd=0; rnd<4; rnd++)
        !            89:       {
        !            90:        mpfr_set_prec (y, q);
        !            91:        mpfr_set_prec (z, q + 10);
        !            92:        mpfr_set_prec (t, q);
        !            93:        inexact = mpfr_pow_ui (y, x, u, rnd);
        !            94:        cmp = mpfr_pow_ui (z, x, u, rnd);
        !            95:        if (mpfr_can_round (z, q + 10, rnd, rnd, q))
        !            96:          {
        !            97:            cmp = mpfr_set (t, z, rnd) || cmp;
        !            98:            if (mpfr_cmp (y, t))
        !            99:              {
        !           100:                fprintf (stderr, "results differ for u=%lu rnd=%s\n", u,
        !           101:                         mpfr_print_rnd_mode(rnd));
        !           102:                printf ("x="); mpfr_print_binary (x); putchar ('\n');
        !           103:                printf ("y="); mpfr_print_binary (y); putchar ('\n');
        !           104:                printf ("t="); mpfr_print_binary (t); putchar ('\n');
        !           105:                printf ("z="); mpfr_print_binary (z); putchar ('\n');
        !           106:                exit (1);
        !           107:              }
        !           108:            if (((inexact == 0) && (cmp != 0)) ||
        !           109:                ((inexact != 0) && (cmp == 0)))
        !           110:              {
        !           111:                fprintf (stderr, "Wrong inexact flag for p=%u, q=%u, rnd=%s\n",
        !           112:                         (unsigned) p, (unsigned) q, mpfr_print_rnd_mode (rnd));
        !           113:                printf ("expected %d, got %d\n", cmp, inexact);
        !           114:                printf ("u=%lu x=", u); mpfr_print_binary (x); putchar ('\n');
        !           115:                 printf ("y="); mpfr_print_binary (y); putchar ('\n');
        !           116:                exit (1);
        !           117:              }
        !           118:          }
        !           119:       }
        !           120:
        !           121:   mpfr_clear (x);
        !           122:   mpfr_clear (y);
        !           123:   mpfr_clear (z);
        !           124:   mpfr_clear (t);
        !           125: }
        !           126:
        !           127: int
        !           128: main (void)
        !           129: {
        !           130:   mp_prec_t p;
        !           131:
        !           132:   check_pow_ui ();
        !           133:
        !           134:   for (p=2; p<100; p++)
        !           135:     check_inexact (p);
        !           136:
        !           137:   return 0;
        !           138: }