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Annotation of OpenXM_contrib/gmp/mpf/tests/t-dm2exp.c, Revision 1.1.1.2

1.1       maekawa     1: /* Test mpf_div, mpf_div_2exp, mpf_mul_2exp.
                      2:
1.1.1.2 ! maekawa     3: Copyright (C) 1996, 2000 Free Software Foundation, Inc.
1.1       maekawa     4:
                      5: This file is part of the GNU MP Library.
                      6:
                      7: The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2 ! maekawa     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
1.1       maekawa    10: option) any later version.
                     11:
                     12: The GNU MP Library is distributed in the hope that it will be useful, but
                     13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2 ! maekawa    14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    15: License for more details.
                     16:
1.1.1.2 ! maekawa    17: You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    18: along with the GNU MP 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 "gmp.h"
                     24: #include "gmp-impl.h"
                     25: #include "urandom.h"
                     26:
                     27: #ifndef SIZE
                     28: #define SIZE 16
                     29: #endif
                     30:
                     31: main (argc, argv)
                     32:      int argc;
                     33:      char **argv;
                     34: {
                     35:   int reps = 500000;
                     36:   int i;
1.1.1.2 ! maekawa    37:   mpf_t u, v, w1, w2, w3;
1.1       maekawa    38:   mp_size_t bprec = 100;
                     39:   mpf_t rerr, limit_rerr;
1.1.1.2 ! maekawa    40:   mp_size_t un;
        !            41:   mp_exp_t ue;
1.1       maekawa    42:
                     43:   if (argc > 1)
                     44:     {
                     45:       reps = strtol (argv[1], 0, 0);
                     46:       if (argc > 2)
                     47:        bprec = strtol (argv[2], 0, 0);
                     48:     }
                     49:
                     50:   mpf_set_default_prec (bprec);
                     51:
                     52:   mpf_init (rerr);
                     53:   mpf_init (limit_rerr);
                     54:
                     55:   mpf_init (u);
                     56:   mpf_init (v);
                     57:   mpf_init (w1);
                     58:   mpf_init (w2);
1.1.1.2 ! maekawa    59:   mpf_init (w3);
1.1       maekawa    60:
                     61:   for (i = 0; i < reps; i++)
                     62:     {
1.1.1.2 ! maekawa    63:       unsigned long int res_prec;
1.1       maekawa    64:       unsigned long int pow2;
                     65:
                     66:       res_prec = urandom () % (bprec + 100);
                     67:       mpf_set_prec (w1, res_prec);
                     68:       mpf_set_prec (w2, res_prec);
1.1.1.2 ! maekawa    69:       mpf_set_prec (w3, res_prec);
1.1       maekawa    70:
                     71:       mpf_set_ui (limit_rerr, 1);
                     72:       mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
                     73:
                     74:       pow2 = urandom () % 0x10000;
                     75:       mpf_set_ui (v, 1);
                     76:       mpf_mul_2exp (v, v, pow2);
                     77:
1.1.1.2 ! maekawa    78:       un = urandom () % (2 * SIZE) - SIZE;
        !            79:       ue = urandom () % SIZE;
        !            80:       mpf_random2 (u, un, ue);
        !            81:
1.1       maekawa    82:       mpf_div_2exp (w1, u, pow2);
                     83:       mpf_div (w2, u, v);
                     84:       mpf_reldiff (rerr, w1, w2);
                     85:       if (mpf_cmp (rerr, limit_rerr) > 0)
                     86:        {
                     87:          printf ("ERROR in mpf_div or mpf_div_2exp after %d tests\n", i);
                     88:          printf ("   u = "); mpf_dump (u);
                     89:          printf ("   v = "); mpf_dump (v);
                     90:          printf ("  w1 = "); mpf_dump (w1);
                     91:          printf ("  w2 = "); mpf_dump (w2);
1.1.1.2 ! maekawa    92:          abort ();
        !            93:        }
        !            94:       mpf_mul_2exp (w3, w1, pow2);
        !            95:       mpf_reldiff (rerr, u, w3);
        !            96:       if (mpf_cmp (rerr, limit_rerr) > 0)
        !            97:        {
        !            98:          printf ("ERROR in mpf_mul_2exp after %d tests\n", i);
        !            99:          printf ("   u = "); mpf_dump (u);
        !           100:          printf ("   v = "); mpf_dump (v);
        !           101:          printf ("  w1 = "); mpf_dump (w1);
        !           102:          printf ("  w3 = "); mpf_dump (w3);
1.1       maekawa   103:          abort ();
                    104:        }
                    105:     }
                    106:
                    107:   exit (0);
                    108: }
                    109:
                    110: oo (x)
                    111:      mpf_t x;
                    112: {
                    113:   mp_size_t i;
                    114:   printf (" exp = %ld\n", x->_mp_exp);
                    115:   printf ("size = %d\n", x->_mp_size);
                    116:   for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
                    117:     printf ("%08lX ", x->_mp_d[i]);
                    118:   printf ("\n");
                    119:   mpf_dump (x);
                    120: }