tests/test-isnanl.h

   1 /* Test of isnanl() substitute.
   2    Copyright (C) 2007-2024 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 test_exit_status;
 104 }