kc3-lang/gnulib/tests/test-roundl.c

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• Hash : b2e2010c
  Author :
  Date : 2010-01-01T10:31:12
  

  update nearly all FSF copyright year lists to include 2010
  
  Use the same procedure as for 2009, outlined in
  http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/20081
  

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• tests/test-roundl.c

• /* Test of rounding to nearest, breaking ties away from zero.
     Copyright (C) 2007-2010 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, write to the Free Software Foundation,
     Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  
  /* Written by Ben Pfaff <blp@gnu.org>, 2007.
     Based heavily on Bruno Haible's test-truncl.c. */
  
  #include <config.h>
  
  #include <math.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (roundl, long double, (long double));
  
  #include <float.h>
  
  #include "fpucw.h"
  #include "isnanl-nolibm.h"
  #include "nan.h"
  #include "macros.h"
  
  /* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
     So we use minus_zero instead.
     IRIX cc can't put -0.0L into .data, but can compute at runtime.
     Note that the expression -LDBL_MIN * LDBL_MIN does not work on other
     platforms, such as when cross-compiling to PowerPC on MacOS X 10.5.  */
  #if defined __hpux || defined __sgi
  static long double
  compute_minus_zero (void)
  {
    return -LDBL_MIN * LDBL_MIN;
  }
  # define minus_zero compute_minus_zero ()
  #else
  long double minus_zero = -0.0L;
  #endif
  
  int
  main ()
  {
    DECL_LONG_DOUBLE_ROUNDING
  
    BEGIN_LONG_DOUBLE_ROUNDING ();
  
    /* Zero.  */
    ASSERT (roundl (0.0L) == 0.0L);
    ASSERT (roundl (minus_zero) == 0.0L);
    /* Positive numbers.  */
    ASSERT (roundl (0.3L) == 0.0L);
    ASSERT (roundl (0.5L) == 1.0L);
    ASSERT (roundl (0.7L) == 1.0L);
    ASSERT (roundl (1.0L) == 1.0L);
    ASSERT (roundl (1.5L) == 2.0L);
    ASSERT (roundl (2.5L) == 3.0L);
    ASSERT (roundl (1.999L) == 2.0L);
    ASSERT (roundl (2.0L) == 2.0L);
    ASSERT (roundl (65535.999L) == 65536.0L);
    ASSERT (roundl (65536.0L) == 65536.0L);
    ASSERT (roundl (65536.001L) == 65536.0L);
    ASSERT (roundl (2.341e31L) == 2.341e31L);
    /* Negative numbers.  */
    ASSERT (roundl (-0.3L) == 0.0L);
    ASSERT (roundl (-0.5L) == -1.0L);
    ASSERT (roundl (-0.7L) == -1.0L);
    ASSERT (roundl (-1.0L) == -1.0L);
    ASSERT (roundl (-1.5L) == -2.0L);
    ASSERT (roundl (-2.5L) == -3.0L);
    ASSERT (roundl (-1.999L) == -2.0L);
    ASSERT (roundl (-2.0L) == -2.0L);
    ASSERT (roundl (-65535.999L) == -65536.0L);
    ASSERT (roundl (-65536.0L) == -65536.0L);
    ASSERT (roundl (-65536.001L) == -65536.0L);
    ASSERT (roundl (-2.341e31L) == -2.341e31L);
    /* Infinite numbers.  */
    ASSERT (roundl (1.0 / 0.0L) == 1.0 / 0.0L);
    ASSERT (roundl (-1.0 / 0.0L) == -1.0 / 0.0L);
    /* NaNs.  */
    ASSERT (isnanl (roundl (NaNl ())));
  
    return 0;
  }
  

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