1  /* Test of isnanl() substitute.
       2     Copyright (C) 2007-2023 Free Software Foundation, Inc.
       3  
       4     This program is free software: you can redistribute it and/or modify
       5     it under the terms of the GNU General Public License as published by
       6     the Free Software Foundation, either version 3 of the License, or
       7     (at your option) any later version.
       8  
       9     This program is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      12     GNU General Public License for more details.
      13  
      14     You should have received a copy of the GNU General Public License
      15     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      16  
      17  /* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
      18  
      19  #include <float.h>
      20  #include <limits.h>
      21  
      22  #include "minus-zero.h"
      23  #include "infinity.h"
      24  #include "nan.h"
      25  #include "snan.h"
      26  #include "macros.h"
      27  
      28  int
      29  main ()
      30  {
      31    /* Finite values.  */
      32    ASSERT (!isnanl (3.141L));
      33    ASSERT (!isnanl (3.141e30L));
      34    ASSERT (!isnanl (3.141e-30L));
      35    ASSERT (!isnanl (-2.718L));
      36    ASSERT (!isnanl (-2.718e30L));
      37    ASSERT (!isnanl (-2.718e-30L));
      38    ASSERT (!isnanl (0.0L));
      39    ASSERT (!isnanl (minus_zerol));
      40    /* Infinite values.  */
      41    ASSERT (!isnanl (Infinityl ()));
      42    ASSERT (!isnanl (- Infinityl ()));
      43    /* Quiet NaN.  */
      44    ASSERT (isnanl (NaNl ()));
      45  #if HAVE_SNANL
      46    /* Signalling NaN.  */
      47    ASSERT (isnanl (SNaNl ()));
      48  #endif
      49  
      50  #if ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
      51  /* Representation of an 80-bit 'long double' as an initializer for a sequence
      52     of 'unsigned int' words.  */
      53  # ifdef WORDS_BIGENDIAN
      54  #  define LDBL80_WORDS(exponent,manthi,mantlo) \
      55       { ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
      56         ((unsigned int) (manthi) << 16) | ((unsigned int) (mantlo) >> 16),   \
      57         (unsigned int) (mantlo) << 16                                        \
      58       }
      59  # else
      60  #  define LDBL80_WORDS(exponent,manthi,mantlo) \
      61       { mantlo, manthi, exponent }
      62  # endif
      63    { /* Quiet NaN.  */
      64      static memory_long_double x =
      65        { .word = LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
      66      ASSERT (isnanl (x.value));
      67    }
      68    {
      69      /* Signalling NaN.  */
      70      static memory_long_double x =
      71        { .word = LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
      72      ASSERT (isnanl (x.value));
      73    }
      74    /* isnanl should return something for noncanonical values.  */
      75    { /* Pseudo-NaN.  */
      76      static memory_long_double x =
      77        { .word = LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
      78      ASSERT (isnanl (x.value) || !isnanl (x.value));
      79    }
      80    { /* Pseudo-Infinity.  */
      81      static memory_long_double x =
      82        { .word = LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
      83      ASSERT (isnanl (x.value) || !isnanl (x.value));
      84    }
      85    { /* Pseudo-Zero.  */
      86      static memory_long_double x =
      87        { .word = LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
      88      ASSERT (isnanl (x.value) || !isnanl (x.value));
      89    }
      90    { /* Unnormalized number.  */
      91      static memory_long_double x =
      92        { .word = LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
      93      ASSERT (isnanl (x.value) || !isnanl (x.value));
      94    }
      95    { /* Pseudo-Denormal.  */
      96      static memory_long_double x =
      97        { .word = LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
      98      ASSERT (isnanl (x.value) || !isnanl (x.value));
      99    }
     100    #undef NWORDS
     101  #endif
     102  
     103    return 0;
     104  }