135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/* Test of signbit() substitute.
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Copyright (C) 2007-2025 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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/* Written by Bruno Haible <bruno@clisp.org>, 2007. */
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#include <config.h>
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#include <math.h>
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/* signbit must be a macro. */
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#ifndef signbit
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# error missing declaration
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#endif
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#include <float.h>
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#include <limits.h>
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#include "minus-zero.h"
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#include "infinity.h"
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#include "signed-nan.h"
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#include "signed-snan.h"
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#include "macros.h"
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float zerof = 0.0f;
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double zerod = 0.0;
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long double zerol = 0.0L;
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static void
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test_signbitf ()
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{
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/* Finite values. */
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ASSERT (!signbit (3.141f));
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ASSERT (!signbit (3.141e30f));
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ASSERT (!signbit (3.141e-30f));
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ASSERT (signbit (-2.718f));
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ASSERT (signbit (-2.718e30f));
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ASSERT (signbit (-2.718e-30f));
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/* Zeros. */
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ASSERT (!signbit (0.0f));
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if (1.0f / minus_zerof < 0)
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ASSERT (signbit (minus_zerof));
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else
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ASSERT (!signbit (minus_zerof));
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/* Infinite values. */
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ASSERT (!signbit (Infinityf ()));
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ASSERT (signbit (- Infinityf ()));
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/* Quiet NaN. */
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ASSERT (!signbit (positive_NaNf ()));
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ASSERT (signbit (negative_NaNf ()));
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#if HAVE_SNANF
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/* Signalling NaN. */
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ASSERT (!signbit (positive_SNaNf ()));
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ASSERT (signbit (negative_SNaNf ()));
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#endif
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}
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static void
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test_signbitd ()
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{
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/* Finite values. */
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ASSERT (!signbit (3.141));
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ASSERT (!signbit (3.141e30));
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ASSERT (!signbit (3.141e-30));
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ASSERT (signbit (-2.718));
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ASSERT (signbit (-2.718e30));
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ASSERT (signbit (-2.718e-30));
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/* Zeros. */
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ASSERT (!signbit (0.0));
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if (1.0 / minus_zerod < 0)
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ASSERT (signbit (minus_zerod));
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else
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ASSERT (!signbit (minus_zerod));
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/* Infinite values. */
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ASSERT (!signbit (Infinityd ()));
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ASSERT (signbit (- Infinityd ()));
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/* Quiet NaN. */
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ASSERT (!signbit (positive_NaNd ()));
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ASSERT (signbit (negative_NaNd ()));
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#if HAVE_SNAND
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/* Signalling NaN. */
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ASSERT (!signbit (positive_SNaNd ()));
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ASSERT (signbit (negative_SNaNd ()));
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#endif
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}
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static void
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test_signbitl ()
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{
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/* Finite values. */
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ASSERT (!signbit (3.141L));
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ASSERT (!signbit (3.141e30L));
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ASSERT (!signbit (3.141e-30L));
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ASSERT (signbit (-2.718L));
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ASSERT (signbit (-2.718e30L));
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ASSERT (signbit (-2.718e-30L));
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/* Zeros. */
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ASSERT (!signbit (0.0L));
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if (1.0L / minus_zerol < 0)
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ASSERT (signbit (minus_zerol));
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else
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ASSERT (!signbit (minus_zerol));
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/* Infinite values. */
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ASSERT (!signbit (Infinityl ()));
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ASSERT (signbit (- Infinityl ()));
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/* Quiet NaN. */
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ASSERT (!signbit (positive_NaNl ()));
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ASSERT (signbit (negative_NaNl ()));
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#if HAVE_SNANL
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/* Signalling NaN. */
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ASSERT (!signbit (positive_SNaNl ()));
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ASSERT (signbit (negative_SNaNl ()));
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#endif
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}
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int
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main ()
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{
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test_signbitf ();
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test_signbitd ();
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test_signbitl ();
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return test_exit_status;
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}
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