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Annotation of OpenXM_contrib/gmp/mpf/tests/t-muldiv.c, Revision 1.1

1.1     ! maekawa     1: /* Test mpf_mul, mpf_div, mpf_ui_div, and mpf_div_ui.
        !             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: main (argc, argv)
        !            32:      int argc;
        !            33:      char **argv;
        !            34: {
        !            35:   mp_size_t size;
        !            36:   mp_exp_t exp;
        !            37:   int reps = 100000;
        !            38:   int i;
        !            39:   mpf_t u, v, w, x;
        !            40:   mp_size_t bprec = 100;
        !            41:   mpf_t rerr, limit_rerr;
        !            42:   mp_limb_t ulimb, vlimb;
        !            43:   int single_flag;
        !            44:
        !            45:   if (argc > 1)
        !            46:     {
        !            47:       reps = strtol (argv[1], 0, 0);
        !            48:       if (argc > 2)
        !            49:        bprec = strtol (argv[2], 0, 0);
        !            50:     }
        !            51:
        !            52:   mpf_set_default_prec (bprec);
        !            53:
        !            54:   mpf_init (rerr);
        !            55:   mpf_init (limit_rerr);
        !            56:
        !            57:   mpf_init (u);
        !            58:   mpf_init (v);
        !            59:   mpf_init (w);
        !            60:   mpf_init (x);
        !            61:
        !            62:   for (i = 0; i < reps; i++)
        !            63:     {
        !            64:       mp_size_t res_prec;
        !            65:
        !            66:       res_prec = urandom () % (bprec + 100);
        !            67:       mpf_set_prec (w, res_prec);
        !            68:       mpf_set_prec (x, res_prec);
        !            69:
        !            70:       mpf_set_ui (limit_rerr, 1);
        !            71:       mpf_div_2exp (limit_rerr, limit_rerr, res_prec);
        !            72:
        !            73:       single_flag = 0;
        !            74:
        !            75:       if ((urandom () & 1) != 0)
        !            76:        {
        !            77:          size = urandom () % (2 * SIZE) - SIZE;
        !            78:          exp = urandom () % SIZE;
        !            79:          mpf_random2 (u, size, exp);
        !            80:        }
        !            81:       else
        !            82:        {
        !            83:          ulimb = urandom ();
        !            84:          mpf_set_ui (u, ulimb);
        !            85:          single_flag = 1;
        !            86:        }
        !            87:
        !            88:       if ((urandom () & 1) != 0)
        !            89:        {
        !            90:          size = urandom () % (2 * SIZE) - SIZE;
        !            91:          exp = urandom () % SIZE;
        !            92:          mpf_random2 (v, size, exp);
        !            93:        }
        !            94:       else
        !            95:        {
        !            96:          vlimb = urandom ();
        !            97:          mpf_set_ui (v, vlimb);
        !            98:          single_flag = 2;
        !            99:        }
        !           100:
        !           101:       if (mpf_sgn (v) == 0)
        !           102:        continue;
        !           103:
        !           104:       mpf_div (w, u, v);
        !           105:       mpf_mul (x, w, v);
        !           106:       mpf_reldiff (rerr, u, x);
        !           107:       if (mpf_cmp (rerr, limit_rerr) > 0)
        !           108:        {
        !           109:          printf ("ERROR in mpf_mul or mpf_div after %d tests\n", i);
        !           110:          printf ("   u = "); mpf_dump (u);
        !           111:          printf ("   v = "); mpf_dump (v);
        !           112:          printf ("   x = "); mpf_dump (x);
        !           113:          printf ("   w = "); mpf_dump (w);
        !           114:          abort ();
        !           115:        }
        !           116:
        !           117:       if (single_flag == 2)
        !           118:        {
        !           119:          mpf_div_ui (x, u, vlimb);
        !           120:          mpf_reldiff (rerr, w, x);
        !           121:          if (mpf_cmp (rerr, limit_rerr) > 0)
        !           122:            {
        !           123:              printf ("ERROR in mpf_div or mpf_div_ui after %d tests\n", i);
        !           124:              printf ("   u = "); mpf_dump (u);
        !           125:              printf ("   v = "); mpf_dump (v);
        !           126:              printf ("   x = "); mpf_dump (x);
        !           127:              printf ("   w = "); mpf_dump (w);
        !           128:              abort ();
        !           129:            }
        !           130:        }
        !           131:
        !           132:       if (single_flag == 1)
        !           133:        {
        !           134:          mpf_ui_div (x, ulimb, v);
        !           135:          mpf_reldiff (rerr, w, x);
        !           136:          if (mpf_cmp (rerr, limit_rerr) > 0)
        !           137:            {
        !           138:              printf ("ERROR in mpf_div or mpf_ui_div after %d tests\n", i);
        !           139:              printf ("   u = "); mpf_dump (u);
        !           140:              printf ("   v = "); mpf_dump (v);
        !           141:              printf ("   x = "); mpf_dump (x);
        !           142:              printf ("   w = "); mpf_dump (w);
        !           143:              abort ();
        !           144:            }
        !           145:        }
        !           146:     }
        !           147:
        !           148:   exit (0);
        !           149: }
        !           150:
        !           151: oo (x)
        !           152:      mpf_t x;
        !           153: {
        !           154:   mp_size_t i;
        !           155:   printf (" exp = %ld\n", x->_mp_exp);
        !           156:   printf ("size = %d\n", x->_mp_size);
        !           157:   for (i = ABS (x->_mp_size) - 1; i >= 0; i--)
        !           158:     printf ("%08lX ", x->_mp_d[i]);
        !           159:   printf ("\n");
        !           160:   mpf_dump (x);
        !           161: }