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/* Test file for mpfr_add_ui
Copyright 2000, 2001, 2002 Free Software Foundation.
This file is part of the MPFR Library.
The 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 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 MPFR Library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA. */
/* #define DEBUG */
/* #define VERBOSE */
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <float.h>
#include <time.h>
#include "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
#include "mpfr-test.h"
void check3 _PROTO((double, unsigned long, unsigned int, double));
void special _PROTO((void));
#define check(x,y,r) check3(x,y,r,0.0)
/* checks that x+y gives the same results in double
and with mpfr with 53 bits of precision */
void
check3 (double x, unsigned long y, unsigned int rnd_mode, double z1)
{
double z2; mpfr_t xx,zz;
mpfr_init2(xx, 53);
mpfr_init2(zz, 53);
mpfr_set_d(xx, x, rnd_mode);
mpfr_add_ui(zz, xx, y, rnd_mode);
#ifdef MPFR_HAVE_FESETROUND
mpfr_set_machine_rnd_mode(rnd_mode);
#endif
if (z1==0.0) z1 = x+y;
z2 = mpfr_get_d1 (zz);
if (z1!=z2 && !(isnan(z1) && isnan(z2))) {
printf("expected sum is %1.20e, got %1.20e\n",z1,z2);
printf("mpfr_add_ui failed for x=%1.20e y=%lu with rnd_mode=%s\n",
x, y, mpfr_print_rnd_mode(rnd_mode));
exit(1);
}
mpfr_clear(xx); mpfr_clear(zz);
}
void
special (void)
{
mpfr_t x, y;
mpfr_init2 (x, 63);
mpfr_init2 (y, 63);
mpfr_set_str_raw (x, "0.110100000000000001110001110010111111000000000101100011100100011");
mpfr_add_ui (y, x, 1, GMP_RNDD);
mpfr_clear (x);
mpfr_clear (y);
}
int
main (int argc, char *argv[])
{
#ifdef MPFR_HAVE_FESETROUND
double x; unsigned long y, N; int i,rnd_mode,rnd;
mpfr_test_init ();
SEED_RAND (time(NULL));
N = (argc<2) ? 1000000 : atoi(argv[1]);
rnd_mode = (argc<3) ? -1 : atoi(argv[2]);
for (i=0;i<1000000;i++) {
x = drand();
y = LONG_RAND();
if (ABS(x)>=DBL_MIN && x+y<DBL_MAX && x+y>-DBL_MAX) {
/* avoid denormalized numbers and overflows */
rnd = (rnd_mode==-1) ? LONG_RAND()%4 : rnd_mode;
check(x, y, rnd);
}
}
#endif
special ();
check3 (-1.716113812768534e-140, 1271212614, GMP_RNDZ,
1.27121261399999976e9);
check3 (1.22191250737771397120e+20, 948002822, GMP_RNDN,
122191250738719408128.0);
check3 (-6.72658901114033715233e-165, 2000878121, GMP_RNDZ,
2.0008781209999997615e9);
check3 (-2.0769715792901673e-5, 880524, GMP_RNDN, 8.8052399997923023e5);
#ifdef HAVE_INFS
check3 (DBL_POS_INF, 2394875, GMP_RNDN, DBL_POS_INF);
check3 (DBL_NEG_INF, 2394875, GMP_RNDN, DBL_NEG_INF);
check3 (DBL_NAN, 2394875, GMP_RNDN, DBL_NAN);
#endif
return 0;
}
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