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Annotation of OpenXM_contrib/gmp/tests/devel/divrem.c, Revision 1.1.1.1

1.1       ohara       1: /*
                      2: Copyright 1996, 1997, 1998, 2000, 2001 Free Software Foundation, Inc.
                      3:
                      4: This file is part of the GNU MP Library.
                      5:
                      6: The GNU MP Library is free software; you can redistribute it and/or modify
                      7: it under the terms of the GNU Lesser General Public License as published by
                      8: the Free Software Foundation; either version 2.1 of the License, or (at your
                      9: option) any later version.
                     10:
                     11: The GNU MP Library is distributed in the hope that it will be useful, but
                     12: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     13: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
                     14: License for more details.
                     15:
                     16: You should have received a copy of the GNU Lesser General Public License
                     17: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     18: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     19: MA 02111-1307, USA.
                     20: */
                     21:
                     22: #include <stdio.h>
                     23: #include "gmp.h"
                     24: #include "gmp-impl.h"
                     25:
                     26: #if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
                     27: #include <time.h>
                     28:
                     29: int
                     30: cputime ()
                     31: {
                     32:   if (CLOCKS_PER_SEC < 100000)
                     33:     return clock () * 1000 / CLOCKS_PER_SEC;
                     34:   return clock () / (CLOCKS_PER_SEC / 1000);
                     35: }
                     36: #else
                     37: #include <sys/types.h>
                     38: #include <sys/time.h>
                     39: #include <sys/resource.h>
                     40:
                     41: int
                     42: cputime ()
                     43: {
                     44:   struct rusage rus;
                     45:
                     46:   getrusage (0, &rus);
                     47:   return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
                     48: }
                     49: #endif
                     50:
                     51: #define M * 1000000
                     52:
                     53: #ifndef CLOCK
                     54: #if defined (__m88k__)
                     55: #define CLOCK 20 M
                     56: #elif defined (__i386__)
                     57: #define CLOCK (16666667)
                     58: #elif defined (__m68k__)
                     59: #define CLOCK (20 M)
                     60: #elif defined (_IBMR2)
                     61: #define CLOCK (25 M)
                     62: #elif defined (__sparc__)
                     63: #define CLOCK (20 M)
                     64: #elif defined (__sun__)
                     65: #define CLOCK (20 M)
                     66: #elif defined (__mips)
                     67: #define CLOCK (40 M)
                     68: #elif defined (__hppa__)
                     69: #define CLOCK (50 M)
                     70: #elif defined (__alpha)
                     71: #define CLOCK (133 M)
                     72: #else
                     73: #error "Don't know CLOCK of your machine"
                     74: #endif
                     75: #endif
                     76:
                     77: #ifndef OPS
                     78: #define OPS 20000000
                     79: #endif
                     80: #ifndef SIZE
                     81: #define SIZE 100
                     82: #endif
                     83: #ifndef TIMES
                     84: #define TIMES OPS/SIZE
                     85: #else
                     86: #undef OPS
                     87: #define OPS (SIZE*TIMES)
                     88: #endif
                     89:
                     90: main ()
                     91: {
                     92:   mp_limb_t nptr[2 * SIZE];
                     93:   mp_limb_t dptr[2 * SIZE];
                     94:   mp_limb_t qptr[2 * SIZE];
                     95:   mp_limb_t pptr[2 * SIZE + 1];
                     96:   mp_limb_t rptr[2 * SIZE];
                     97:   mp_size_t nsize, dsize, qsize, rsize, psize;
                     98:   int test;
                     99:   mp_limb_t qlimb;
                    100:
                    101:   for (test = 0; ; test++)
                    102:     {
                    103:       printf ("%d\n", test);
                    104: #ifdef RANDOM
                    105:       nsize = random () % (2 * SIZE) + 1;
                    106:       dsize = random () % nsize + 1;
                    107: #else
                    108:       nsize = 2 * SIZE;
                    109:       dsize = SIZE;
                    110: #endif
                    111:
                    112:       mpn_random2 (nptr, nsize);
                    113:       mpn_random2 (dptr, dsize);
                    114:       dptr[dsize - 1] |= (mp_limb_t) 1 << (BITS_PER_MP_LIMB - 1);
                    115:
                    116:       MPN_COPY (rptr, nptr, nsize);
                    117:       qlimb = mpn_divrem (qptr, (mp_size_t) 0, rptr, nsize, dptr, dsize);
                    118:       rsize = dsize;
                    119:       qsize = nsize - dsize;
                    120:       qptr[qsize] = qlimb;
                    121:       qsize += qlimb;
                    122:       if (qsize == 0 || qsize > 2 * SIZE)
                    123:        {
                    124:          continue;             /* bogus */
                    125:        }
                    126:       else
                    127:        {
                    128:          mp_limb_t cy;
                    129:          if (qsize > dsize)
                    130:            mpn_mul (pptr, qptr, qsize, dptr, dsize);
                    131:          else
                    132:            mpn_mul (pptr, dptr, dsize, qptr, qsize);
                    133:          psize = qsize + dsize;
                    134:          psize -= pptr[psize - 1] == 0;
                    135:          cy = mpn_add (pptr, pptr, psize, rptr, rsize);
                    136:          pptr[psize] = cy;
                    137:          psize += cy;
                    138:        }
                    139:
                    140:       if (nsize != psize || mpn_cmp (nptr, pptr, nsize) != 0)
                    141:        abort ();
                    142:     }
                    143: }