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101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
/* Test of rint() function.
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Copyright (C) 2010-2017 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 <http://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
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#include <config.h>
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#include <math.h>
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#include "signature.h"
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SIGNATURE_CHECK (rint, double, (double));
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#include <float.h>
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#include <stdio.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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#undef INFINITY
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#undef NAN
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#define DOUBLE double
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#define ISNAN isnand
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#define INFINITY Infinityd ()
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#define NAN NaNd ()
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#define L_(literal) literal
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#define RINT rint
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#define RANDOM randomd
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#include "test-rint.h"
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int
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main ()
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{
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/* Consider the current rounding mode, cf.
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<http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/float.h.html> */
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if (FLT_ROUNDS == 1)
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{
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/* The current rounding mode is round-to-nearest
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(the default in IEEE 754). */
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/* Zero. */
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ASSERT (rint (0.0) == 0.0);
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ASSERT (rint (minus_zerod) == 0.0);
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/* Positive numbers. */
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ASSERT (rint (0.3) == 0.0);
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ASSERT (rint (0.5) == 0.0); /* unlike round() */
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ASSERT (rint (0.7) == 1.0);
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ASSERT (rint (1.0) == 1.0);
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ASSERT (rint (1.5) == 2.0);
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ASSERT (rint (1.999) == 2.0);
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ASSERT (rint (2.0) == 2.0);
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ASSERT (rint (2.1) == 2.0);
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ASSERT (rint (2.5) == 2.0); /* unlike round() */
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ASSERT (rint (2.7) == 3.0);
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ASSERT (rint (65535.999) == 65536.0);
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ASSERT (rint (65536.0) == 65536.0);
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ASSERT (rint (65536.001) == 65536.0);
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ASSERT (rint (2.341e31) == 2.341e31);
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/* Negative numbers. */
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ASSERT (rint (-0.3) == 0.0);
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ASSERT (rint (-0.5) == 0.0); /* unlike round() */
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ASSERT (rint (-0.7) == -1.0);
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ASSERT (rint (-1.0) == -1.0);
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ASSERT (rint (-1.5) == -2.0);
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ASSERT (rint (-1.999) == -2.0);
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ASSERT (rint (-2.0) == -2.0);
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ASSERT (rint (-2.1) == -2.0);
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ASSERT (rint (-2.5) == -2.0); /* unlike round() */
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ASSERT (rint (-2.7) == -3.0);
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ASSERT (rint (-65535.999) == -65536.0);
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ASSERT (rint (-65536.0) == -65536.0);
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ASSERT (rint (-65536.001) == -65536.0);
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ASSERT (rint (-2.341e31) == -2.341e31);
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test_function ();
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return 0;
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}
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else
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{
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fputs ("Skipping test: non-standard rounding mode\n", stderr);
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return 77;
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}
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}
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