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/* Test file for mpfr_add_ui
Copyright (C) 2000 PolKA project, Inria Lorraine and Loria
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 Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.
You should have received a copy of the GNU Library 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 "gmp.h"
#include "mpfr.h"
#include "mpfr-impl.h"
#ifdef IRIX64
#include <sys/fpu.h>
#endif
extern int isnan();
extern int getpid();
#define ABS(x) (((x)>0) ? (x) : (-x))
#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);
mpfr_set_machine_rnd_mode(rnd_mode);
if (z1==0.0) z1 = x+y;
z2 = mpfr_get_d(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);
}
int main(argc,argv) int argc; char *argv[];
{
double x; unsigned long y, N; int i,rnd_mode,rnd;
#ifdef IRIX64
/* to get denormalized numbers on IRIX64 */
union fpc_csr exp;
exp.fc_word = get_fpc_csr();
exp.fc_struct.flush = 0;
set_fpc_csr(exp.fc_word);
#endif
check3(-1.716113812768534e-140, 1271212614, GMP_RNDZ, 1.27121261399999976e9);
check(1.22191250737771397120e+20, 948002822, GMP_RNDN);
srand(getpid());
N = (argc<2) ? 1000000 : atoi(argv[1]);
rnd_mode = (argc<3) ? -1 : atoi(argv[2]);
for (i=0;i<1000000;i++) {
x = drand();
y = lrand48();
if (ABS(x)>2.2e-307 && x+y<1.7e+308 && x+y>-1.7e308) {
/* avoid denormalized numbers and overflows */
rnd = (rnd_mode==-1) ? lrand48()%4 : rnd_mode;
check(x, y, rnd);
}
}
return 0;
}
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