Mercurial > gnulib
view tests/test-roundf-ieee.c @ 17364:7524d97ae56f
stdalign: port to stricter ISO C11
ISO C11 says that _Alignof's operand must be a parenthesized type.
Problem reported by Eli Zaretskii in
<http://lists.gnu.org/archive/html/emacs-devel/2013-03/msg00960.html>.
* doc/posix-headers/stdalign.texi (stdalign.h): Document this.
* m4/stdalign.m4 (gl_STDALIGN_H): Don't use _Alignof (expr).
author | Paul Eggert <eggert@cs.ucla.edu> |
---|---|
date | Fri, 29 Mar 2013 19:47:13 -0700 |
parents | e542fd46ad6f |
children | 344018b6e5d7 |
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/* Test of rounding to nearest, breaking ties away from zero. Copyright (C) 2010-2013 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 <http://www.gnu.org/licenses/>. */ #include <config.h> #include <math.h> #include "isnanf-nolibm.h" #include "minus-zero.h" #include "infinity.h" #include "nan.h" #include "macros.h" int main () { /* See IEEE 754, section 6.3: "the sign of the result of the round floating-point number to integral value operation is the sign of the operand. These rules shall apply even when operands or results are zero or infinite." */ /* Zero. */ ASSERT (!signbit (roundf (0.0f))); ASSERT (!!signbit (roundf (minus_zerof)) == !!signbit (minus_zerof)); /* Positive numbers. */ ASSERT (!signbit (roundf (0.3f))); ASSERT (!signbit (roundf (0.7f))); /* Negative numbers. */ ASSERT (!!signbit (roundf (-0.3f)) == !!signbit (minus_zerof)); ASSERT (!!signbit (roundf (-0.7f)) == !!signbit (minus_zerof)); /* [MX] shaded specification in POSIX. */ /* NaN. */ ASSERT (isnanf (roundf (NaNf ()))); /* Infinity. */ ASSERT (roundf (Infinityf ()) == Infinityf ()); ASSERT (roundf (- Infinityf ()) == - Infinityf ()); return 0; }