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Diffstat (limited to 'gnulib/tests/test-isnan.c')
m--------- | gnulib | 0 | ||||
-rw-r--r-- | gnulib/tests/test-isnan.c | 222 |
2 files changed, 222 insertions, 0 deletions
diff --git a/gnulib b/gnulib deleted file mode 160000 -Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1 diff --git a/gnulib/tests/test-isnan.c b/gnulib/tests/test-isnan.c new file mode 100644 index 0000000..6c735f2 --- /dev/null +++ b/gnulib/tests/test-isnan.c @@ -0,0 +1,222 @@ +/* Test of isnand() substitute. + Copyright (C) 2007-2011 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 <http://www.gnu.org/licenses/>. */ + +/* Written by Ben Pfaff <blp@cs.stanford.edu>, from code by Bruno + Haible <bruno@clisp.org>. */ + +#include <config.h> + +#include <math.h> + +/* isnan must be a macro. */ +#ifndef isnan +# error missing declaration +#endif + +#include <float.h> +#include <limits.h> + +#include "minus-zero.h" +#include "infinity.h" +#include "nan.h" +#include "macros.h" + +static void +test_float (void) +{ + /* Finite values. */ + ASSERT (!isnan (3.141f)); + ASSERT (!isnan (3.141e30f)); + ASSERT (!isnan (3.141e-30f)); + ASSERT (!isnan (-2.718f)); + ASSERT (!isnan (-2.718e30f)); + ASSERT (!isnan (-2.718e-30f)); + ASSERT (!isnan (0.0f)); + ASSERT (!isnan (minus_zerof)); + /* Infinite values. */ + ASSERT (!isnan (Infinityf ())); + ASSERT (!isnan (- Infinityf ())); + /* Quiet NaN. */ + ASSERT (isnan (NaNf ())); +#if defined FLT_EXPBIT0_WORD && defined FLT_EXPBIT0_BIT + /* Signalling NaN. */ + { + #define NWORDSF \ + ((sizeof (float) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { float value; unsigned int word[NWORDSF]; } memory_float; + memory_float m; + m.value = NaNf (); +# 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 < NWORDSF / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + if (FLT_EXPBIT0_WORD < NWORDSF / 2) + m.word[FLT_EXPBIT0_WORD + 1] |= (unsigned int) 1 << FLT_EXPBIT0_BIT; + else + m.word[0] |= (unsigned int) 1; + ASSERT (isnan (m.value)); + } +#endif +} + +static void +test_double (void) +{ + /* Finite values. */ + ASSERT (!isnan (3.141)); + ASSERT (!isnan (3.141e30)); + ASSERT (!isnan (3.141e-30)); + ASSERT (!isnan (-2.718)); + ASSERT (!isnan (-2.718e30)); + ASSERT (!isnan (-2.718e-30)); + ASSERT (!isnan (0.0)); + ASSERT (!isnan (minus_zerod)); + /* Infinite values. */ + ASSERT (!isnan (Infinityd ())); + ASSERT (!isnan (- Infinityd ())); + /* Quiet NaN. */ + ASSERT (isnan (NaNd ())); +#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT + /* Signalling NaN. */ + { + #define NWORDSD \ + ((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { double value; unsigned int word[NWORDSD]; } memory_double; + memory_double m; + m.value = NaNd (); +# 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 < NWORDSD / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + m.word[DBL_EXPBIT0_WORD + (DBL_EXPBIT0_WORD < NWORDSD / 2 ? 1 : - 1)] + |= (unsigned int) 1 << DBL_EXPBIT0_BIT; + ASSERT (isnan (m.value)); + } +#endif +} + +static void +test_long_double (void) +{ + #define NWORDSL \ + ((sizeof (long double) + sizeof (unsigned int) - 1) / sizeof (unsigned int)) + typedef union { unsigned int word[NWORDSL]; long double value; } + memory_long_double; + + /* Finite values. */ + ASSERT (!isnan (3.141L)); + ASSERT (!isnan (3.141e30L)); + ASSERT (!isnan (3.141e-30L)); + ASSERT (!isnan (-2.718L)); + ASSERT (!isnan (-2.718e30L)); + ASSERT (!isnan (-2.718e-30L)); + ASSERT (!isnan (0.0L)); + ASSERT (!isnan (minus_zerol)); + /* Infinite values. */ + ASSERT (!isnan (Infinityl ())); + ASSERT (!isnan (- Infinityl ())); + /* Quiet NaN. */ + ASSERT (isnan (NaNl ())); + +#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. */ + { + memory_long_double m; + m.value = NaNl (); +# 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 < NWORDSL / 2 ? 1 : - 1)] + ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1); +# endif + m.word[LDBL_EXPBIT0_WORD + (LDBL_EXPBIT0_WORD < NWORDSL / 2 ? 1 : - 1)] + |= (unsigned int) 1 << LDBL_EXPBIT0_BIT; + ASSERT (isnan (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 (isnan (x.value)); + } + { + /* Signalling NaN. */ + static memory_long_double x = + { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) }; + ASSERT (isnan (x.value)); + } + /* The isnan function should recognize Pseudo-NaNs, Pseudo-Infinities, + Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in + Intel IA-64 Architecture Software Developer's Manual, Volume 1: + Application Architecture. + Table 5-2 "Floating-Point Register Encodings" + Figure 5-6 "Memory to Floating-Point Register Data Translation" + */ + { /* Pseudo-NaN. */ + static memory_long_double x = + { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; + ASSERT (isnan (x.value)); + } + { /* Pseudo-Infinity. */ + static memory_long_double x = + { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; + ASSERT (isnan (x.value)); + } + { /* Pseudo-Zero. */ + static memory_long_double x = + { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; + ASSERT (isnan (x.value)); + } + { /* Unnormalized number. */ + static memory_long_double x = + { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; + ASSERT (isnan (x.value)); + } + { /* Pseudo-Denormal. */ + static memory_long_double x = + { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; + ASSERT (isnan (x.value)); + } +#endif +} + +int +main () +{ + test_float (); + test_double (); + test_long_double (); + return 0; +} |