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/* Test of rounding towards negative infinity.
Copyright (C) 2010-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <math.h>
#include "isnanf-nolibm.h"
#include "minus-zero.h"
#include "infinity.h"
#include "nan.h"
#include "macros.h"
/* If IEEE compliance was not requested, the ICC compiler inlines its
own floorf assembly that turns -0.0f to 0.0f; but that is a correct
result when IEEE is not enforced. To avoid spurious failure, we
have to provide this dummy function in order to outsmart ICC's
inlining, and call our floorf through a function pointer. */
static float
dummy (float f)
{
return 0;
}
int
main (int argc, _GL_UNUSED char **argv)
{
float (*my_floorf) (float) = argc ? floorf : dummy;
/* See IEEE 754, section 6.3:
"the sign of the result of the round floating-point number to
integral value operation is the sign of the operand. These rules
shall apply even when operands or results are zero or infinite." */
/* Zero. */
ASSERT (!signbit (my_floorf (0.0f)));
ASSERT (!!signbit (my_floorf (minus_zerof)) == !!signbit (minus_zerof));
/* Positive numbers. */
ASSERT (!signbit (my_floorf (0.3f)));
ASSERT (!signbit (my_floorf (0.7f)));
/* Negative numbers. */
ASSERT (!!signbit (my_floorf (-0.3f)) == !!signbit (minus_zerof));
ASSERT (!!signbit (my_floorf (-0.7f)) == !!signbit (minus_zerof));
/* [MX] shaded specification in POSIX. */
/* NaN. */
ASSERT (isnanf (floorf (NaNf ())));
/* Infinity. */
ASSERT (floorf (Infinityf ()) == Infinityf ());
ASSERT (floorf (- Infinityf ()) == - Infinityf ());
return 0;
}
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