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55 lines
1.8 KiB
C
55 lines
1.8 KiB
C
/* Test of rounding towards zero.
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Copyright (C) 2010-2026 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <math.h>
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#include "isnanf-nolibm.h"
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#include "minus-zero.h"
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#include "infinity.h"
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#include "nan.h"
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#include "macros.h"
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int
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main ()
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{
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/* See IEEE 754, section 6.3:
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"the sign of the result of the round floating-point number to
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integral value operation is the sign of the operand. These rules
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shall apply even when operands or results are zero or infinite." */
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/* Zero. */
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ASSERT (!signbit (truncf (0.0f)));
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ASSERT (!!signbit (truncf (minus_zerof)) == !!signbit (minus_zerof));
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/* Positive numbers. */
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ASSERT (!signbit (truncf (0.3f)));
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ASSERT (!signbit (truncf (0.7f)));
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/* Negative numbers. */
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ASSERT (!!signbit (truncf (-0.3f)) == !!signbit (minus_zerof));
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ASSERT (!!signbit (truncf (-0.7f)) == !!signbit (minus_zerof));
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/* [MX] shaded specification in POSIX. */
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/* NaN. */
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ASSERT (isnanf (truncf (NaNf ())));
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/* Infinity. */
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ASSERT (truncf (Infinityf ()) == Infinityf ());
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ASSERT (truncf (- Infinityf ()) == - Infinityf ());
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return test_exit_status;
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}
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