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3731f98aec
* tests/test-round-ieee.c: Include isnand-nolibm.h, infinity.h, nan.h. (main): Add tests for [MX] shaded specification in POSIX. * modules/round-ieee-tests (Files): Add tests/infinity.h, tests/nan.h. (Depends-on): Add isnand-nolibm.
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Test of rounding to nearest, breaking ties away from zero.
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Copyright (C) 2010-2012 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, or (at your option)
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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 <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <math.h>
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#include "isnand-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 (round (0.0)));
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ASSERT (!!signbit (round (minus_zerod)) == !!signbit (minus_zerod));
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/* Positive numbers. */
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ASSERT (!signbit (round (0.3)));
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ASSERT (!signbit (round (0.7)));
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/* Negative numbers. */
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ASSERT (!!signbit (round (-0.3)) == !!signbit (minus_zerod));
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ASSERT (!!signbit (round (-0.7)) == !!signbit (minus_zerod));
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/* [MX] shaded specification in POSIX. */
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/* NaN. */
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ASSERT (isnand (round (NaNd ())));
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/* Infinity. */
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ASSERT (round (Infinityd ()) == Infinityd ());
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ASSERT (round (- Infinityd ()) == - Infinityd ());
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return 0;
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}
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