kc3-lang/gnulib/tests/test-roundf-ieee.c

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• Hash : 2d93933a
  Author :
  Date : 2012-02-26T14:27:22
  

  roundf-ieee tests: More tests.
  
  * tests/test-roundf-ieee.c: Include isnanf-nolibm.h, infinity.h, nan.h.
  (main): Add tests for [MX] shaded specification in POSIX.
  * modules/roundf-ieee-tests (Files): Add tests/infinity.h, tests/nan.h.
  (Depends-on): Add isnanf-nolibm.
  

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• tests/test-roundf-ieee.c

• /* Test of rounding to nearest, breaking ties away from zero.
     Copyright (C) 2010-2012 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;
  }
  

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