Mercurial > gnulib
view tests/test-round1.c @ 40057:b06060465f09
maint: Run 'make update-copyright'
author | Paul Eggert <eggert@cs.ucla.edu> |
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date | Tue, 01 Jan 2019 00:25:11 +0100 |
parents | 10eb9086bea0 |
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/* Test of rounding to nearest, breaking ties away from zero. Copyright (C) 2007-2019 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, 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/>. */ /* Written by Ben Pfaff <blp@gnu.org>, 2007. Based heavily on Bruno Haible's test-trunc.c. */ #include <config.h> #include <math.h> #include "signature.h" SIGNATURE_CHECK (round, double, (double)); #include "isnand-nolibm.h" #include "minus-zero.h" #include "infinity.h" #include "nan.h" #include "macros.h" int main () { /* Zero. */ ASSERT (round (0.0) == 0.0); ASSERT (round (minus_zerod) == 0.0); /* Positive numbers. */ ASSERT (round (0.3) == 0.0); ASSERT (round (0.5) == 1.0); ASSERT (round (0.7) == 1.0); ASSERT (round (1.0) == 1.0); ASSERT (round (1.5) == 2.0); ASSERT (round (2.5) == 3.0); ASSERT (round (1.999) == 2.0); ASSERT (round (2.0) == 2.0); ASSERT (round (65535.999) == 65536.0); ASSERT (round (65536.0) == 65536.0); ASSERT (round (65536.001) == 65536.0); ASSERT (round (2.341e31) == 2.341e31); /* Negative numbers. */ ASSERT (round (-0.3) == 0.0); ASSERT (round (-0.5) == -1.0); ASSERT (round (-0.7) == -1.0); ASSERT (round (-1.0) == -1.0); ASSERT (round (-1.5) == -2.0); ASSERT (round (-2.5) == -3.0); ASSERT (round (-1.999) == -2.0); ASSERT (round (-2.0) == -2.0); ASSERT (round (-65535.999) == -65536.0); ASSERT (round (-65536.0) == -65536.0); ASSERT (round (-65536.001) == -65536.0); ASSERT (round (-2.341e31) == -2.341e31); /* Infinite numbers. */ ASSERT (round (Infinityd ()) == Infinityd ()); ASSERT (round (- Infinityd ()) == - Infinityd ()); /* NaNs. */ ASSERT (isnand (round (NaNd ()))); return 0; }