third_party/gmp/tests/devel/shift.c

/*
Copyright 1996, 1998-2001, 2004, 2007, 2009, 2011 Free Software Foundation,
Inc.

This file is part of the GNU MP Library test suite.

The GNU MP Library test suite is free software; you can redistribute it
and/or modify it under the terms of the GNU 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 test suite 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 General
Public License for more details.

You should have received a copy of the GNU General Public License along with
the GNU MP Library test suite.  If not, see https://www.gnu.org/licenses/.  */

#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include "gmp-impl.h"
#include "tests.h"

#ifdef OPERATION_lshift
#define func __gmpn_lshift
#define reffunc refmpn_lshift
#define funcname "mpn_lshift"
#endif

#ifdef OPERATION_rshift
#define func __gmpn_rshift
#define reffunc refmpn_rshift
#define funcname "mpn_rshift"
#endif

#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 print_posneg (mp_limb_t);
static void mpn_print (mp_ptr, mp_size_t);

#define LXW ((int) (2 * sizeof (mp_limb_t)))
#define M * 1000000

#ifndef CLOCK
#error "Don't know CLOCK of your machine"
#endif

#ifndef OPS
#define OPS (CLOCK/5)
#endif
#ifndef SIZE
#define SIZE 496
#endif
#ifndef TIMES
#define TIMES OPS/(SIZE+1)
#endif

#ifndef CNT
int CNT = 4;
#endif

int
main (int argc, char **argv)
{
  mp_ptr s1, dx, dy;
  mp_limb_t cyx, cyy;
  int i;
  long t0, t;
  unsigned int test;
  int cnt = CNT;
  mp_size_t size;
  unsigned int ntests;

  s1 = malloc (SIZE * sizeof (mp_limb_t));
  dx = malloc ((SIZE + 2) * sizeof (mp_limb_t));
  dy = malloc ((SIZE + 2) * sizeof (mp_limb_t));

  ntests = ~(unsigned) 0;
  if (argc == 2)
    ntests = strtol (argv[1], 0, 0);

  for (test = 1; test <= ntests; test++)
    {
#if TIMES == 1 && ! defined (PRINT)
      if (test % (SIZE > 100000 ? 1 : 100000 / SIZE) == 0)
	{
	  printf ("\r%u", test);
	  fflush (stdout);
	}
#endif

#if TIMES == 1
      cnt = random () % (GMP_NUMB_BITS - 1) + 1;
#endif

#ifdef RANDOM
      size = random () % SIZE + 1;
#else
      size = SIZE;
#endif

      dx[0] = 0x87654321;
      dy[0] = 0x87654321;
      dx[size+1] = 0x12345678;
      dy[size+1] = 0x12345678;

#if TIMES != 1
      mpn_random (s1, size);

      t0 = cputime();
      for (i = 0; i < TIMES; i++)
	func (dx+1, s1, size, cnt);
      t = cputime() - t0;
      printf (funcname ":    %5ldms (%.3f cycles/limb)\n",
	      t, ((double) t * CLOCK) / (TIMES * size * 1000.0));
#endif

#ifndef NOCHECK
      mpn_random (s1, size);

#ifdef PRINT
      printf ("cnt=%-*d ", (int) (2 * sizeof(mp_limb_t)) - 4, cnt);
      mpn_print (s1, size);
#endif

      /* Put garbage in the destination.  */
      for (i = 0; i < size; i++)
	{
	  dx[i+1] = 0xdead;
	  dy[i+1] = 0xbeef;
	}

      cyx = reffunc (dx+1, s1, size, cnt);
      cyy = func (dy+1, s1, size, cnt);

#ifdef PRINT
      mpn_print (&cyx, 1);
      mpn_print (dx+1, size);
      mpn_print (&cyy, 1);
      mpn_print (dy+1, size);
#endif

      if (cyx != cyy || mpn_cmp (dx, dy, size+2) != 0
	  || dx[0] != 0x87654321 || dx[size+1] != 0x12345678)
	{
	  mp_size_t s, e;
	  for (s = 0;; s++)
	    if ((unsigned long long) (dx+1)[s] != (unsigned long long) (dy+1)[s])
	      break;
	  for (e = size - 1;; e--)
	    if ((unsigned long long) (dx+1)[e] != (unsigned long long) (dy+1)[e])
	      break;
#ifndef PRINT
	  printf ("cnt=%-*d\n", (int) (2 * sizeof(mp_limb_t)) - 4, cnt);
	  for (i = s; i <= e; i++)
	    {
	      printf ("%6d: ", i);
	      printf ("%0*llX ", LXW, (unsigned long long) (dx+1)[i]);
	      printf ("%0*llX ", LXW, (unsigned long long) (dy+1)[i]);
	      print_posneg ((dy+1)[i] - (dx+1)[i]);
	      printf ("\n");
	    }
	  printf ("%6s: ", "retval");
	  printf ("%0*llX ", LXW, (unsigned long long) cyx);
	  printf ("%0*llX ", LXW, (unsigned long long) cyy);
	  print_posneg (cyx - cyy);
#endif
	  printf ("\n");
	  if (dy[0] != 0x87654321)
	    printf ("clobbered at low end\n");
	  if (dy[size+1] != 0x12345678)
	    printf ("clobbered at high end\n");
	  printf ("TEST NUMBER %u\n", test);
	  abort();
	}
#endif
    }
  exit (0);
}

static void
print_posneg (mp_limb_t d)
{
  char buf[LXW + 2];
  if (d == 0)
    printf (" %*X", LXW, 0);
  else if (-d < d)
    {
      sprintf (buf, "%llX", (unsigned long long) -d);
      printf ("%*s-%s", LXW - (int) strlen (buf), "", buf);
    }
  else
    {
      sprintf (buf, "%llX", (unsigned long long) d);
      printf ("%*s+%s", LXW - (int) strlen (buf), "", buf);
    }
}

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 ("");
}