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Annotation of OpenXM_contrib/gmp/mpf/tests/t-sub.c, Revision 1.1.1.1

1.1       maekawa     1: /* Test mpf_sub.
                      2:
                      3: Copyright (C) 1996 Free Software Foundation, Inc.
                      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
                      8: it under the terms of the GNU Library General Public License as published by
                      9: the Free Software Foundation; either version 2 of the License, or (at your
                     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
                     14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     15: License for more details.
                     16:
                     17: You should have received a copy of the GNU Library General Public License
                     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: #if __STDC__
                     32: void ref_mpf_add (mpf_t, const mpf_t, const mpf_t);
                     33: void ref_mpf_sub (mpf_t, const mpf_t, const mpf_t);
                     34: #else
                     35: void ref_mpf_add ();
                     36: void ref_mpf_sub ();
                     37: #endif
                     38:
                     39: main (argc, argv)
                     40:      int argc;
                     41:      char **argv;
                     42: {
                     43:   mp_size_t size;
                     44:   mp_exp_t exp;
                     45:   int reps = 500000;
                     46:   int i;
                     47:   mpf_t u, v, w, wref;
                     48:   mp_size_t bprec = 100;
                     49:   mpf_t rerr, max_rerr, limit_rerr;
                     50:
                     51:   if (argc > 1)
                     52:     {
                     53:       reps = strtol (argv[1], 0, 0);
                     54:       if (argc > 2)
                     55:        bprec = strtol (argv[2], 0, 0);
                     56:     }
                     57:
                     58:   mpf_set_default_prec (bprec);
                     59:
                     60:   mpf_init_set_ui (limit_rerr, 1);
                     61:   mpf_div_2exp (limit_rerr, limit_rerr, bprec);
                     62: #if VERBOSE
                     63:   mpf_dump (limit_rerr);
                     64: #endif
                     65:   mpf_init (rerr);
                     66:   mpf_init_set_ui (max_rerr, 0);
                     67:
                     68:   mpf_init (u);
                     69:   mpf_init (v);
                     70:   mpf_init (w);
                     71:   mpf_init (wref);
                     72:   for (i = 0; i < reps; i++)
                     73:     {
                     74:       size = urandom () % (2 * SIZE) - SIZE;
                     75:       exp = urandom () % SIZE;
                     76:       mpf_random2 (u, size, exp);
                     77:
                     78:       size = urandom () % (2 * SIZE) - SIZE;
                     79:       exp = urandom () % SIZE;
                     80:       mpf_random2 (v, size, exp);
                     81:
                     82:       if ((urandom () & 1) != 0)
                     83:        mpf_add_ui (u, v, 1);
                     84:       else if ((urandom () & 1) != 0)
                     85:        mpf_sub_ui (u, v, 1);
                     86:
                     87:       mpf_sub (w, u, v);
                     88:       ref_mpf_sub (wref, u, v);
                     89:
                     90:       mpf_reldiff (rerr, w, wref);
                     91:       if (mpf_cmp (rerr, max_rerr) > 0)
                     92:        {
                     93:          mpf_set (max_rerr, rerr);
                     94: #if VERBOSE
                     95:          mpf_dump (max_rerr);
                     96: #endif
                     97:          if (mpf_cmp (rerr, limit_rerr) > 0)
                     98:            {
                     99:              printf ("ERROR after %d tests\n", i);
                    100:              printf ("   u = "); mpf_dump (u);
                    101:              printf ("   v = "); mpf_dump (v);
                    102:              printf ("wref = "); mpf_dump (wref);
                    103:              printf ("   w = "); mpf_dump (w);
                    104:              abort ();
                    105:            }
                    106:        }
                    107:     }
                    108:
                    109:   exit (0);
                    110: }
                    111:
                    112: oo (x)
                    113:      mpf_t x;
                    114: {
                    115:   mp_size_t i;
                    116:   printf (" exp = %ld\n", x->_mp_exp);
                    117:   printf ("size = %d\n", x->_mp_size);
                    118:   for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
                    119:     printf ("%08lX ", x->_mp_d[i]);
                    120:   printf ("\n");
                    121:   mpf_dump (x);
                    122: }