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/* Test of isfinite() substitute.
Copyright (C) 2007-2020 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 of the License, 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 <https://www.gnu.org/licenses/>. */
/* Written by Ben Pfaff, 2007, using Bruno Haible's code as a
template. */
#include <config.h>
#include <math.h>
/* isfinite must be a macro. */
#ifndef isfinite
# error missing declaration
#endif
#include <float.h>
#include <limits.h>
#include "infinity.h"
#include "macros.h"
float zerof = 0.0f;
double zerod = 0.0;
long double zerol = 0.0L;
static void
test_isfinitef ()
{
/* Zero. */
ASSERT (isfinite (0.0f));
/* Subnormal values. */
ASSERT (isfinite (FLT_MIN / 2));
ASSERT (isfinite (-FLT_MIN / 2));
/* Finite values. */
ASSERT (isfinite (3.141f));
ASSERT (isfinite (3.141e30f));
ASSERT (isfinite (3.141e-30f));
ASSERT (isfinite (-2.718f));
ASSERT (isfinite (-2.718e30f));
ASSERT (isfinite (-2.718e-30f));
/* Infinite values. */
ASSERT (!isfinite (Infinityf ()));
ASSERT (!isfinite (- Infinityf ()));
/* Quiet NaN. */
ASSERT (!isfinite (zerof / zerof));
#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT
/* Signalling NaN. */
{
#define NWORDS \
((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
typedef union { float value; unsigned int word[NWORDS]; } memory_float;
memory_float m;
m.value = zerof / zerof;
# if FLT_EXPBIT0_BIT > 0
m.word[FLT_EXPBIT0_WORD] ^= (unsigned int) 1 << (FLT_EXPBIT0_BIT - 1);
# else
m.word[FLT_EXPBIT0_WORD + (FLT_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
# endif
if (FLT_EXPBIT0_WORD < NWORDS / 2)
m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT;
else
m.word[0] |= (unsigned int) 1;
ASSERT (!isfinite (m.value));
#undef NWORDS
}
#endif
}
static void
test_isfinited ()
{
/* Zero. */
ASSERT (isfinite (0.0));
/* Subnormal values. */
ASSERT (isfinite (DBL_MIN / 2));
ASSERT (isfinite (-DBL_MIN / 2));
/* Finite values. */
ASSERT (isfinite (3.141));
ASSERT (isfinite (3.141e30));
ASSERT (isfinite (3.141e-30));
ASSERT (isfinite (-2.718));
ASSERT (isfinite (-2.718e30));
ASSERT (isfinite (-2.718e-30));
/* Infinite values. */
ASSERT (!isfinite (Infinityd ()));
ASSERT (!isfinite (- Infinityd ()));
/* Quiet NaN. */
ASSERT (!isfinite (zerod / zerod));
#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
/* Signalling NaN. */
{
#define NWORDS \
((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
typedef union { double value; unsigned int word[NWORDS]; } memory_double;
memory_double m;
m.value = zerod / zerod;
# if DBL_EXPBIT0_BIT > 0
m.word[DBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (DBL_EXPBIT0_BIT - 1);
# else
m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
# endif
m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
|= (unsigned int) 1 << DBL_EXPBIT0_BIT;
ASSERT (!isfinite (m.value));
#undef NWORDS
}
#endif
}
static void
test_isfinitel ()
{
#define NWORDS \
((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
typedef union { unsigned int word[NWORDS]; long double value; }
memory_long_double;
/* Zero. */
ASSERT (isfinite (0.0L));
/* Subnormal values. */
ASSERT (isfinite (LDBL_MIN / 2));
ASSERT (isfinite (-LDBL_MIN / 2));
/* Finite values. */
ASSERT (isfinite (3.141L));
ASSERT (isfinite (3.141e30L));
ASSERT (isfinite (3.141e-30L));
ASSERT (isfinite (-2.718L));
ASSERT (isfinite (-2.718e30L));
ASSERT (isfinite (-2.718e-30L));
/* Infinite values. */
ASSERT (!isfinite (Infinityl ()));
ASSERT (!isfinite (- Infinityl ()));
/* Quiet NaN. */
ASSERT (!isfinite (zerol / zerol));
#if defined LDBL_EXPBIT0_WORD && defined LDBL_EXPBIT0_BIT
/* A bit pattern that is different from a Quiet NaN. With a bit of luck,
it's a Signalling NaN. */
{
#if defined __powerpc__ && LDBL_MANT_DIG == 106
/* This is PowerPC "double double", a pair of two doubles. Inf and Nan are
represented as the corresponding 64-bit IEEE values in the first double;
the second is ignored. Manipulate only the first double. */
#undef NWORDS
#define NWORDS \
((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
#endif
memory_long_double m;
m.value = zerol / zerol;
# if LDBL_EXPBIT0_BIT > 0
m.word[LDBL_EXPBIT0_WORD] ^= (unsigned int) 1 << (LDBL_EXPBIT0_BIT - 1);
# else
m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
# endif
m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDS / 2 ? 1 : - 1)]
|= (unsigned int) 1 << LDBL_EXPBIT0_BIT;
ASSERT (!isfinite (m.value));
}
#endif
#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
/* Representation of an 80-bit 'long double' as an initializer for a sequence
of 'unsigned int' words. */
# ifdef WORDS_BIGENDIAN
# define LDBL80_WORDS(exponent,manthi,mantlo) \
{ ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
((unsigned int) (manthi) << 16) | ((unsigned int) (mantlo) >> 16), \
(unsigned int) (mantlo) << 16 \
}
# else
# define LDBL80_WORDS(exponent,manthi,mantlo) \
{ mantlo, manthi, exponent }
# endif
{ /* Quiet NaN. */
static memory_long_double x =
{ LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
ASSERT (!isfinite (x.value));
}
{
/* Signalling NaN. */
static memory_long_double x =
{ LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
ASSERT (!isfinite (x.value));
}
/* isfinite should return something for noncanonical values. */
{ /* Pseudo-NaN. */
static memory_long_double x =
{ LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
ASSERT (isfinite (x.value) || !isfinite (x.value));
}
{ /* Pseudo-Infinity. */
static memory_long_double x =
{ LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
ASSERT (isfinite (x.value) || !isfinite (x.value));
}
{ /* Pseudo-Zero. */
static memory_long_double x =
{ LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
ASSERT (isfinite (x.value) || !isfinite (x.value));
}
{ /* Unnormalized number. */
static memory_long_double x =
{ LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
ASSERT (isfinite (x.value) || !isfinite (x.value));
}
{ /* Pseudo-Denormal. */
static memory_long_double x =
{ LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
ASSERT (isfinite (x.value) || !isfinite (x.value));
}
#endif
#undef NWORDS
}
int
main ()
{
test_isfinitef ();
test_isfinited ();
test_isfinitel ();
return 0;
}
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