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/* Test file for mpfr_copysign, mpfr_setsign and mpfr_signbit.
Copyright 2004, 2006-2021 Free Software Foundation, Inc.
Contributed by the AriC and Caramba 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 3 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.LESSER. If not, see
https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. */
#include "mpfr-test.h"
static void
copysign_variant (mpfr_ptr z, mpfr_srcptr x, mpfr_srcptr y,
mpfr_rnd_t rnd_mode, int k)
{
mpfr_srcptr p;
int a = 0, b = 0, c = 0;
/* invalid sign, to test that the sign is always correctly set */
MPFR_SIGN (z) = 0;
if (k >= 8)
{
MPFR_ASSERTN (MPFR_PREC (z) >= MPFR_PREC (x));
mpfr_set (z, x, MPFR_RNDN);
p = z;
k -= 8;
}
else
p = x;
mpfr_clear_flags ();
switch (k)
{
case 0:
mpfr_copysign (z, p, y, rnd_mode);
return;
case 1:
(mpfr_copysign) (z, p, y, rnd_mode);
return;
case 2:
#ifdef IGNORE_CPP_COMPAT
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wc++-compat"
#endif
mpfr_copysign ((a++, VOIDP_CAST(z)),
(b++, VOIDP_CAST(p)),
(c++, VOIDP_CAST(y)), rnd_mode);
#ifdef IGNORE_CPP_COMPAT
#pragma GCC diagnostic pop
#endif
MPFR_ASSERTN (a == 1);
MPFR_ASSERTN (b == 1);
MPFR_ASSERTN (c == 1);
return;
case 3:
mpfr_setsign (z, p, mpfr_signbit (y), rnd_mode);
return;
case 4:
mpfr_setsign (z, p, (mpfr_signbit) (y), rnd_mode);
return;
case 5:
(mpfr_setsign) (z, p, mpfr_signbit (y), rnd_mode);
return;
case 6:
(mpfr_setsign) (z, p, (mpfr_signbit) (y), rnd_mode);
return;
case 7:
#ifdef IGNORE_CPP_COMPAT
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wc++-compat"
#endif
mpfr_setsign ((a++, VOIDP_CAST(z)),
(b++, VOIDP_CAST(p)),
mpfr_signbit ((c++, VOIDP_CAST(y))), rnd_mode);
#ifdef IGNORE_CPP_COMPAT
#pragma GCC diagnostic pop
#endif
MPFR_ASSERTN (a == 1);
MPFR_ASSERTN (b == 1);
MPFR_ASSERTN (c == 1);
return;
}
}
int
main (void)
{
mpfr_t x, y, z;
int i, j, k;
tests_start_mpfr ();
mpfr_init (x);
mpfr_init (y);
mpfr_init (z);
for (i = 0; i <= 1; i++)
for (j = 0; j <= 1; j++)
for (k = 0; k < 16; k++)
{
mpfr_set_nan (x);
i ? MPFR_SET_NEG (x) : MPFR_SET_POS (x);
mpfr_set_nan (y);
j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y);
copysign_variant (z, x, y, MPFR_RNDN, k);
if (MPFR_SIGN (z) != MPFR_SIGN (y) || !mpfr_nanflag_p ())
{
printf ("Error in mpfr_copysign (%cNaN, %cNaN)\n",
i ? '-' : '+', j ? '-' : '+');
exit (1);
}
mpfr_set_si (x, i ? -1250 : 1250, MPFR_RNDN);
mpfr_set_nan (y);
j ? MPFR_SET_NEG (y) : MPFR_SET_POS (y);
copysign_variant (z, x, y, MPFR_RNDN, k);
if (i != j)
mpfr_neg (x, x, MPFR_RNDN);
if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ())
{
printf ("Error in mpfr_copysign (%c1250, %cNaN)\n",
i ? '-' : '+', j ? '-' : '+');
exit (1);
}
mpfr_set_si (x, i ? -1250 : 1250, MPFR_RNDN);
mpfr_set_si (y, j ? -1717 : 1717, MPFR_RNDN);
copysign_variant (z, x, y, MPFR_RNDN, k);
if (i != j)
mpfr_neg (x, x, MPFR_RNDN);
if (! mpfr_equal_p (z, x) || mpfr_nanflag_p ())
{
printf ("Error in mpfr_copysign (%c1250, %c1717)\n",
i ? '-' : '+', j ? '-' : '+');
exit (1);
}
}
mpfr_clear (x);
mpfr_clear (y);
mpfr_clear (z);
tests_end_mpfr ();
return 0;
}
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