#include <stdio.h>
#include <gmp.h>
#if 0
# include "gmp-impl.h" /* needs config.h */
#else
# define BITS_PER_MP_LIMB (sizeof(long) * 8)
#endif

#define SIZE 16

int main(void)
{
  mpf_t x, x1;
  int r;

  mpf_init2( x, SIZE * BITS_PER_MP_LIMB);
  mpf_set_si( x, -1);
  mpf_div_2exp( x, x, (SIZE + 1) * BITS_PER_MP_LIMB);
  /* x == -0x0.000...001. */
  mpf_add_ui( x, x, 2);
  /* x == 0x1.fff...fff. */

  mpf_init2( x1, SIZE * BITS_PER_MP_LIMB);
#if 0
  mpf_set_ui( x1, 1);
  mpf_mul( x1, x, x1);
#else
  mpf_mul_ui( x1, x, 1);
#endif
  r = mpf_cmp( x, x1);
  printf("cmp (x, 1*x) == %d\n", r);
  return 0;
}