mpfr-2.4.1/tests/tremquo.c - native_client/nacl-gcc - Git at Google

 /* tremquo -- test file for mpfr_remquo and mpfr_remainder

 Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
 Contributed by the Arenaire and Cacao projects, INRIA.

 This file is part of the GNU MPFR Library.

 The GNU MPFR 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 2.1 of the License, or (at your
 option) any later version.

 The GNU MPFR 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 MPFR Library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
 MA 02110-1301, USA. */

 #include <stdio.h>
 #include <stdlib.h>

 #include "mpfr-test.h"

 int
 main (int argc, char *argv[])
 {
   mpfr_t x, y, r;
   long q[1];

   if (argc == 3) /* usage: tremquo x y (rnd=GMP_RNDN implicit) */
     {
       mpfr_init2 (x, BITS_PER_MP_LIMB);
       mpfr_init2 (y, BITS_PER_MP_LIMB);
       mpfr_init2 (r, BITS_PER_MP_LIMB);
       mpfr_set_str (x, argv[1], 10, GMP_RNDN);
       mpfr_set_str (y, argv[2], 10, GMP_RNDN);
       mpfr_remquo (r, q, x, y, GMP_RNDN);
       printf ("r=");
       mpfr_out_str (stdout, 10, 0, r, GMP_RNDN);
       printf (" q=%ld\n", q[0]);
       mpfr_clear (x);
       mpfr_clear (y);
       mpfr_clear (r);
       return 0;
     }

   tests_start_mpfr ();

   mpfr_init (x);
   mpfr_init (y);
   mpfr_init (r);

   /* special values */
   mpfr_set_nan (x);
   mpfr_set_ui (y, 1, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN(mpfr_nan_p (r));

   mpfr_set_ui (x, 1, GMP_RNDN);
   mpfr_set_nan (y);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN(mpfr_nan_p (r));

   mpfr_set_inf (x, 1); /* +Inf */
   mpfr_set_ui (y, 1, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_nan_p (r));

   mpfr_set_inf (x, 1); /* +Inf */
   mpfr_set_ui (y, 0, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_nan_p (r));

   mpfr_set_inf (x, 1); /* +Inf */
   mpfr_set_inf (y, 1);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_nan_p (r));

   mpfr_set_ui (x, 0, GMP_RNDN);
   mpfr_set_inf (y, 1);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_POS (r));
   MPFR_ASSERTN (q[0] == (long) 0);

   mpfr_set_ui (x, 0, GMP_RNDN);
   mpfr_neg (x, x, GMP_RNDN); /* -0 */
   mpfr_set_inf (y, 1);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_NEG (r));
   MPFR_ASSERTN (q[0] == (long) 0);

   mpfr_set_ui (x, 17, GMP_RNDN);
   mpfr_set_inf (y, 1);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp (r, x) == 0);
   MPFR_ASSERTN (q[0] == (long) 0);

   mpfr_set_ui (x, 17, GMP_RNDN);
   mpfr_set_ui (y, 0, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_nan_p (r));

   mpfr_set_ui (x, 0, GMP_RNDN);
   mpfr_set_ui (y, 17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_POS (r));
   MPFR_ASSERTN (q[0] == (long) 0);

   mpfr_set_ui (x, 0, GMP_RNDN);
   mpfr_neg (x, x, GMP_RNDN);
   mpfr_set_ui (y, 17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_NEG (r));
   MPFR_ASSERTN (q[0] == (long) 0);

   mpfr_set_prec (x, 53);
   mpfr_set_prec (y, 53);

   /* check four possible sign combinations */
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_set_ui (y, 17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 8) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);
   mpfr_set_si (x, -42, GMP_RNDN);
   mpfr_set_ui (y, 17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (r, -8) == 0);
   MPFR_ASSERTN (q[0] == (long) -2);
   mpfr_set_si (x, -42, GMP_RNDN);
   mpfr_set_si (y, -17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (r, -8) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_set_si (y, -17, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui (r, 8) == 0);
   MPFR_ASSERTN (q[0] == (long) -2);

   mpfr_set_prec (x, 100);
   mpfr_set_prec (y, 50);
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_nextabove (x); /* 42 + 2^(-94) */
   mpfr_set_ui (y, 21, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -94) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);

   mpfr_set_prec (x, 50);
   mpfr_set_prec (y, 100);
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_nextabove (x); /* 42 + 2^(-44) */
   mpfr_set_ui (y, 21, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -44) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);

   mpfr_set_prec (x, 100);
   mpfr_set_prec (y, 50);
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_set_ui (y, 21, GMP_RNDN);
   mpfr_nextabove (y); /* 21 + 2^(-45) */
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* r should be 42 - 2*(21 + 2^(-45)) = -2^(-44) */
   MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -44) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);

   mpfr_set_prec (x, 50);
   mpfr_set_prec (y, 100);
   mpfr_set_ui (x, 42, GMP_RNDN);
   mpfr_set_ui (y, 21, GMP_RNDN);
   mpfr_nextabove (y); /* 21 + 2^(-95) */
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* r should be 42 - 2*(21 + 2^(-95)) = -2^(-94) */
   MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -94) == 0);
   MPFR_ASSERTN (q[0] == (long) 2);

   /* exercise large quotient */
   mpfr_set_ui_2exp (x, 1, 65, GMP_RNDN);
   mpfr_set_ui (y, 1, GMP_RNDN);
   /* quotient is 2^65 */
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (r, 0) == 0);
   MPFR_ASSERTN (q[0] % 1073741824L == 0L);

   /* another large quotient */
   mpfr_set_prec (x, 65);
   mpfr_set_prec (y, 65);
   mpfr_const_pi (x, GMP_RNDN);
   mpfr_mul_2exp (x, x, 63, GMP_RNDN);
   mpfr_const_log2 (y, GMP_RNDN);
   mpfr_set_prec (r, 10);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* q should be 41803643793084085130, r should be 605/2048 */
   MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 605, -11) == 0);
   MPFR_ASSERTN ((q[0] > 0) && ((q[0] % 1073741824L) == 733836170L));

   /* check cases where quotient is 1.5 +/- eps */
   mpfr_set_prec (x, 65);
   mpfr_set_prec (y, 65);
   mpfr_set_prec (r, 63);
   mpfr_set_ui (x, 3, GMP_RNDN);
   mpfr_set_ui (y, 2, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* x/y = 1.5, quotient should be 2 (even rule), remainder should be -1 */
   MPFR_ASSERTN (mpfr_cmp_si (r, -1) == 0);
   MPFR_ASSERTN (q[0] == 2L);
   mpfr_set_ui (x, 3, GMP_RNDN);
   mpfr_nextabove (x); /* 3 + 2^(-63) */
   mpfr_set_ui (y, 2, GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* x/y = 1.5 + 2^(-64), quo should be 2, r should be -1 + 2^(-63) */
   MPFR_ASSERTN (mpfr_add_ui (r, r, 1, GMP_RNDN) == 0);
   MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -63) == 0);
   MPFR_ASSERTN (q[0] == 2L);
   mpfr_set_ui (x, 3, GMP_RNDN);
   mpfr_set_ui (y, 2, GMP_RNDN);
   mpfr_nextabove (y); /* 2 + 2^(-63) */
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   /* x/y = 1.5 - eps, quo should be 1, r should be 1 - 2^(-63) */
   MPFR_ASSERTN (mpfr_sub_ui (r, r, 1, GMP_RNDN) == 0);
   MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -63) == 0);
   MPFR_ASSERTN (q[0] == 1L);

   /* bug founds by Kaveh Ghazi, 3 May 2007 */
   mpfr_set_ui (x, 2, GMP_RNDN);
   mpfr_set_ui (y, 3, GMP_RNDN);
   mpfr_remainder (r, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (r, -1) == 0);

   mpfr_set_si (x, -1, GMP_RNDN);
   mpfr_set_ui (y, 1, GMP_RNDN);
   mpfr_remainder (r, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (r, 0) == 0 && MPFR_SIGN (r) < 0);

   /* check argument reuse */
   mpfr_set_si (x, -1, GMP_RNDN);
   mpfr_set_ui (y, 1, GMP_RNDN);
   mpfr_remainder (x, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_cmp_si (x, 0) == 0 && MPFR_SIGN (x) < 0);

   mpfr_set_ui_2exp (x, 1, mpfr_get_emax () - 1, GMP_RNDN);
   mpfr_set_ui_2exp (y, 1, mpfr_get_emin (), GMP_RNDN);
   mpfr_remquo (r, q, x, y, GMP_RNDN);
   MPFR_ASSERTN (mpfr_zero_p (r) && MPFR_SIGN (r) > 0);
   MPFR_ASSERTN (q[0] == 0);

   mpfr_clear (x);
   mpfr_clear (y);
   mpfr_clear (r);

   tests_end_mpfr ();

   return 0;
 }
	/* tremquo -- test file for mpfr_remquo and mpfr_remainder

	Copyright 2007, 2008, 2009 Free Software Foundation, Inc.
	Contributed by the Arenaire and Cacao projects, INRIA.

	This file is part of the GNU MPFR Library.

	The GNU MPFR 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 2.1 of the License, or (at your
	option) any later version.

	The GNU MPFR 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 MPFR Library; see the file COPYING.LIB. If not, write to
	the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
	MA 02110-1301, USA. */

	#include <stdio.h>
	#include <stdlib.h>

	#include "mpfr-test.h"

	int
	main (int argc, char *argv[])
	{
	mpfr_t x, y, r;
	long q[1];

	if (argc == 3) /* usage: tremquo x y (rnd=GMP_RNDN implicit) */
	{
	mpfr_init2 (x, BITS_PER_MP_LIMB);
	mpfr_init2 (y, BITS_PER_MP_LIMB);
	mpfr_init2 (r, BITS_PER_MP_LIMB);
	mpfr_set_str (x, argv[1], 10, GMP_RNDN);
	mpfr_set_str (y, argv[2], 10, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	printf ("r=");
	mpfr_out_str (stdout, 10, 0, r, GMP_RNDN);
	printf (" q=%ld\n", q[0]);
	mpfr_clear (x);
	mpfr_clear (y);
	mpfr_clear (r);
	return 0;
	}

	tests_start_mpfr ();

	mpfr_init (x);
	mpfr_init (y);
	mpfr_init (r);

	/* special values */
	mpfr_set_nan (x);
	mpfr_set_ui (y, 1, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN(mpfr_nan_p (r));

	mpfr_set_ui (x, 1, GMP_RNDN);
	mpfr_set_nan (y);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN(mpfr_nan_p (r));

	mpfr_set_inf (x, 1); /* +Inf */
	mpfr_set_ui (y, 1, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_nan_p (r));

	mpfr_set_inf (x, 1); /* +Inf */
	mpfr_set_ui (y, 0, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_nan_p (r));

	mpfr_set_inf (x, 1); /* +Inf */
	mpfr_set_inf (y, 1);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_nan_p (r));

	mpfr_set_ui (x, 0, GMP_RNDN);
	mpfr_set_inf (y, 1);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_POS (r));
	MPFR_ASSERTN (q[0] == (long) 0);

	mpfr_set_ui (x, 0, GMP_RNDN);
	mpfr_neg (x, x, GMP_RNDN); /* -0 */
	mpfr_set_inf (y, 1);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_NEG (r));
	MPFR_ASSERTN (q[0] == (long) 0);

	mpfr_set_ui (x, 17, GMP_RNDN);
	mpfr_set_inf (y, 1);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp (r, x) == 0);
	MPFR_ASSERTN (q[0] == (long) 0);

	mpfr_set_ui (x, 17, GMP_RNDN);
	mpfr_set_ui (y, 0, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_nan_p (r));

	mpfr_set_ui (x, 0, GMP_RNDN);
	mpfr_set_ui (y, 17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_POS (r));
	MPFR_ASSERTN (q[0] == (long) 0);

	mpfr_set_ui (x, 0, GMP_RNDN);
	mpfr_neg (x, x, GMP_RNDN);
	mpfr_set_ui (y, 17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 0) == 0 && MPFR_IS_NEG (r));
	MPFR_ASSERTN (q[0] == (long) 0);

	mpfr_set_prec (x, 53);
	mpfr_set_prec (y, 53);

	/* check four possible sign combinations */
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_set_ui (y, 17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 8) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);
	mpfr_set_si (x, -42, GMP_RNDN);
	mpfr_set_ui (y, 17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (r, -8) == 0);
	MPFR_ASSERTN (q[0] == (long) -2);
	mpfr_set_si (x, -42, GMP_RNDN);
	mpfr_set_si (y, -17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (r, -8) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_set_si (y, -17, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui (r, 8) == 0);
	MPFR_ASSERTN (q[0] == (long) -2);

	mpfr_set_prec (x, 100);
	mpfr_set_prec (y, 50);
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_nextabove (x); /* 42 + 2^(-94) */
	mpfr_set_ui (y, 21, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -94) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);

	mpfr_set_prec (x, 50);
	mpfr_set_prec (y, 100);
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_nextabove (x); /* 42 + 2^(-44) */
	mpfr_set_ui (y, 21, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -44) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);

	mpfr_set_prec (x, 100);
	mpfr_set_prec (y, 50);
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_set_ui (y, 21, GMP_RNDN);
	mpfr_nextabove (y); /* 21 + 2^(-45) */
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* r should be 42 - 2(21 + 2^(-45)) = -2^(-44) /
	MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -44) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);

	mpfr_set_prec (x, 50);
	mpfr_set_prec (y, 100);
	mpfr_set_ui (x, 42, GMP_RNDN);
	mpfr_set_ui (y, 21, GMP_RNDN);
	mpfr_nextabove (y); /* 21 + 2^(-95) */
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* r should be 42 - 2(21 + 2^(-95)) = -2^(-94) /
	MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -94) == 0);
	MPFR_ASSERTN (q[0] == (long) 2);

	/* exercise large quotient */
	mpfr_set_ui_2exp (x, 1, 65, GMP_RNDN);
	mpfr_set_ui (y, 1, GMP_RNDN);
	/* quotient is 2^65 */
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (r, 0) == 0);
	MPFR_ASSERTN (q[0] % 1073741824L == 0L);

	/* another large quotient */
	mpfr_set_prec (x, 65);
	mpfr_set_prec (y, 65);
	mpfr_const_pi (x, GMP_RNDN);
	mpfr_mul_2exp (x, x, 63, GMP_RNDN);
	mpfr_const_log2 (y, GMP_RNDN);
	mpfr_set_prec (r, 10);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* q should be 41803643793084085130, r should be 605/2048 */
	MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 605, -11) == 0);
	MPFR_ASSERTN ((q[0] > 0) && ((q[0] % 1073741824L) == 733836170L));

	/* check cases where quotient is 1.5 +/- eps */
	mpfr_set_prec (x, 65);
	mpfr_set_prec (y, 65);
	mpfr_set_prec (r, 63);
	mpfr_set_ui (x, 3, GMP_RNDN);
	mpfr_set_ui (y, 2, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* x/y = 1.5, quotient should be 2 (even rule), remainder should be -1 */
	MPFR_ASSERTN (mpfr_cmp_si (r, -1) == 0);
	MPFR_ASSERTN (q[0] == 2L);
	mpfr_set_ui (x, 3, GMP_RNDN);
	mpfr_nextabove (x); /* 3 + 2^(-63) */
	mpfr_set_ui (y, 2, GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* x/y = 1.5 + 2^(-64), quo should be 2, r should be -1 + 2^(-63) */
	MPFR_ASSERTN (mpfr_add_ui (r, r, 1, GMP_RNDN) == 0);
	MPFR_ASSERTN (mpfr_cmp_ui_2exp (r, 1, -63) == 0);
	MPFR_ASSERTN (q[0] == 2L);
	mpfr_set_ui (x, 3, GMP_RNDN);
	mpfr_set_ui (y, 2, GMP_RNDN);
	mpfr_nextabove (y); /* 2 + 2^(-63) */
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	/* x/y = 1.5 - eps, quo should be 1, r should be 1 - 2^(-63) */
	MPFR_ASSERTN (mpfr_sub_ui (r, r, 1, GMP_RNDN) == 0);
	MPFR_ASSERTN (mpfr_cmp_si_2exp (r, -1, -63) == 0);
	MPFR_ASSERTN (q[0] == 1L);

	/* bug founds by Kaveh Ghazi, 3 May 2007 */
	mpfr_set_ui (x, 2, GMP_RNDN);
	mpfr_set_ui (y, 3, GMP_RNDN);
	mpfr_remainder (r, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (r, -1) == 0);

	mpfr_set_si (x, -1, GMP_RNDN);
	mpfr_set_ui (y, 1, GMP_RNDN);
	mpfr_remainder (r, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (r, 0) == 0 && MPFR_SIGN (r) < 0);

	/* check argument reuse */
	mpfr_set_si (x, -1, GMP_RNDN);
	mpfr_set_ui (y, 1, GMP_RNDN);
	mpfr_remainder (x, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_cmp_si (x, 0) == 0 && MPFR_SIGN (x) < 0);

	mpfr_set_ui_2exp (x, 1, mpfr_get_emax () - 1, GMP_RNDN);
	mpfr_set_ui_2exp (y, 1, mpfr_get_emin (), GMP_RNDN);
	mpfr_remquo (r, q, x, y, GMP_RNDN);
	MPFR_ASSERTN (mpfr_zero_p (r) && MPFR_SIGN (r) > 0);
	MPFR_ASSERTN (q[0] == 0);

	mpfr_clear (x);
	mpfr_clear (y);
	mpfr_clear (r);

	tests_end_mpfr ();

	return 0;
	}