divmod_1.c
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上传日期:2022-08-06
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文件大小:5k
- /*
- Copyright 1996, 1998, 2000, 2001, 2007 Free Software Foundation, Inc.
- This file is part of the GNU MP Library.
- The GNU MP Library is free software; you can redistribute it and/or modify
- it under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 3 of the License, or (at your
- option) any later version.
- The GNU MP Library is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
- License for more details.
- You should have received a copy of the GNU Lesser General Public License
- along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
- #include <stdio.h>
- #include <stdlib.h>
- #include "gmp.h"
- #include "gmp-impl.h"
- #include "tests.h"
- #if defined (USG) || defined (__SVR4) || defined (_UNICOS) || defined (__hpux)
- #include <time.h>
- int
- cputime ()
- {
- if (CLOCKS_PER_SEC < 100000)
- return clock () * 1000 / CLOCKS_PER_SEC;
- return clock () / (CLOCKS_PER_SEC / 1000);
- }
- #else
- #include <sys/types.h>
- #include <sys/time.h>
- #include <sys/resource.h>
- int
- cputime ()
- {
- struct rusage rus;
- getrusage (0, &rus);
- return rus.ru_utime.tv_sec * 1000 + rus.ru_utime.tv_usec / 1000;
- }
- #endif
- static void mpn_print (mp_ptr, mp_size_t);
- #define M * 1000000
- #ifndef CLOCK
- #error "Don't know CLOCK of your machine"
- #endif
- #ifndef OPS
- #define OPS 20000000
- #endif
- #ifndef SIZE
- #define SIZE 1000
- #endif
- #ifndef TIMES
- #define TIMES OPS/SIZE
- #endif
- #ifndef FSIZE
- #define FSIZE SIZE
- #endif
- int
- main ()
- {
- mp_limb_t np[SIZE];
- mp_limb_t dx[SIZE + FSIZE + 2];
- mp_limb_t dy[SIZE + FSIZE + 2];
- mp_limb_t dlimb;
- mp_size_t nn, fn;
- mp_limb_t retx, rety;
- int test;
- #if TIMES != 1
- int i;
- long t0, t;
- double cyc;
- #endif
- for (test = 0; ; test++)
- {
- #if TIMES == 1 && ! defined (PRINT)
- if (test % (SIZE > 100000 ? 1 : 100000 / SIZE) == 0)
- {
- printf ("r%u", test);
- fflush (stdout);
- }
- #endif
- #ifdef RANDOM
- nn = random () % (SIZE + 1);
- fn = random () % (FSIZE + 1);
- #else
- nn = SIZE;
- fn = FSIZE;
- #endif
- dx[0] = 0x87654321;
- dx[nn + fn + 1] = 0x12345678;
- dy[0] = 0x87654321;
- dy[nn + fn + 1] = 0x12345678;
- mpn_random2 (np, nn);
- #ifdef FIXED_DLIMB
- dlimb = FIXED_DLIMB;
- #else
- do
- {
- mpn_random2 (&dlimb, 1);
- #ifdef FORCE_NORM
- dlimb |= GMP_NUMB_HIGHBIT;
- #endif
- #ifdef FORCE_UNNORM
- dlimb &= GMP_NUMB_MAX >> 1;
- #endif
- }
- while (dlimb == 0);
- #endif
- #if defined (PRINT) || defined (XPRINT)
- printf ("N=");
- mpn_print (np, nn);
- printf ("D=");
- mpn_print (&dlimb, 1);
- printf ("nn=%ldn", (long) nn);
- #endif
- #if TIMES != 1
- t0 = cputime();
- for (i = 0; i < TIMES; i++)
- mpn_divrem_1 (dx + 1, 0L, np, nn, dlimb);
- t = cputime() - t0;
- cyc = ((double) t * CLOCK) / (TIMES * nn * 1000.0);
- printf ("mpn_divrem_1 int: %5ldms (%.3f cycles/limb) [%.2f Gb/s]n",
- t, cyc,
- CLOCK/cyc*GMP_LIMB_BITS*GMP_LIMB_BITS/1e9);
- t0 = cputime();
- for (i = 0; i < TIMES; i++)
- mpn_divrem_1 (dx + 1, fn, np, 0, dlimb);
- t = cputime() - t0;
- cyc = ((double) t * CLOCK) / (TIMES * fn * 1000.0);
- printf ("mpn_divrem_1 frac: %5ldms (%.3f cycles/limb) [%.2f Gb/s]n",
- t, cyc,
- CLOCK/cyc*GMP_LIMB_BITS*GMP_LIMB_BITS/1e9);
- #endif
- retx = refmpn_divrem_1 (dx + 1, fn, np, nn, dlimb);
- rety = mpn_divrem_1 (dy + 1, fn, np, nn, dlimb);
- #ifndef NOCHECK
- if (retx != rety || mpn_cmp (dx, dy, fn + nn + 2) != 0)
- {
- printf ("ERROR in test %d, nn=%ld, fn=%ldn", test, nn, fn);
- mpn_print (np, nn);
- mpn_print (&dlimb, 1);
- printf ("rq: ");
- mpn_print (dx + 1, nn + fn);
- printf ("rr: %*lXn", (int) (2 * sizeof(mp_limb_t)), retx);
- printf (" q: ");
- mpn_print (dy + 1, nn + fn);
- printf (" r: %*lXn", (int) (2 * sizeof(mp_limb_t)), rety);
- if (dy[0] != 0x87654321)
- printf ("clobbered at low end %*lXn", (int) (2 * sizeof(mp_limb_t)), dy[0]);
- if (dy[nn + fn + 1] != 0x12345678)
- printf ("clobbered at high endn");
- abort ();
- }
- #endif
- }
- }
- static void
- mpn_print (mp_ptr p, mp_size_t size)
- {
- mp_size_t i;
- for (i = size - 1; i >= 0; i--)
- {
- #ifdef _LONG_LONG_LIMB
- printf ("%0*lX%0*lX", (int) (sizeof(mp_limb_t)),
- (unsigned long) (p[i] >> (GMP_LIMB_BITS/2)),
- (int) (sizeof(mp_limb_t)), (unsigned long) (p[i]));
- #else
- printf ("%0*lX", (int) (2 * sizeof(mp_limb_t)), p[i]);
- #endif
- #ifdef SPACE
- if (i != 0)
- printf (" ");
- #endif
- }
- puts ("");
- }