X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-isnan.c;h=d1d05dcea42a6d3a10780175a3fb83184c70a838;hb=d913c90f6a01f889db65cbb516683aab2f28c533;hp=3541af4be511e4d314ed7f620f4028f010555de5;hpb=6e2c5ce9d2220c2be7d35a0be15e9e6827305476;p=gnulib.git
diff --git a/tests/test-isnan.c b/tests/test-isnan.c
index 3541af4be..d1d05dcea 100644
--- a/tests/test-isnan.c
+++ b/tests/test-isnan.c
@@ -1,5 +1,5 @@
-/* Test of isnan() substitute.
- Copyright (C) 2007 Free Software Foundation, Inc.
+/* Test of isnand() substitute.
+ 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
@@ -14,41 +14,90 @@
You should have received a copy of the GNU General Public License
along with this program. If not, see . */
-/* Written by Bruno Haible , 2007. */
+/* Written by Ben Pfaff , from code by Bruno
+ Haible . */
#include
-#include "isnan.h"
+#include
+/* isnan must be a macro. */
+#ifndef isnan
+# error missing declaration
+#endif
+
+#include
#include
-#include
-#include
-
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- abort (); \
- } \
- } \
- while (0)
-
-/* The Compaq (ex-DEC) C 6.4 compiler chokes on the expression 0.0 / 0.0. */
-#ifdef __DECC
-static double
-NaN ()
+
+#include "nan.h"
+#include "macros.h"
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0f.
+ So we use -zero instead. */
+float zerof = 0.0f;
+
+/* HP cc on HP-UX 10.20 has a bug with the constant expression -0.0.
+ So we use -zero instead. */
+double zerod = 0.0;
+
+/* On HP-UX 10.20, negating 0.0L does not yield -0.0L.
+ So we use minus_zerol 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_zerol (void)
{
- static double zero = 0.0;
- return zero / zero;
+ return -LDBL_MIN * LDBL_MIN;
}
+# define minus_zerol compute_minus_zerol ()
#else
-# define NaN() (0.0 / 0.0)
+long double minus_zerol = -0.0L;
#endif
-int
-main ()
+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 (-zerof));
+ /* Infinite values. */
+ ASSERT (!isnan (1.0f / 0.0f));
+ ASSERT (!isnan (-1.0f / 0.0f));
+ /* 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));
@@ -58,30 +107,138 @@ main ()
ASSERT (!isnan (-2.718e30));
ASSERT (!isnan (-2.718e-30));
ASSERT (!isnan (0.0));
- ASSERT (!isnan (-0.0));
+ ASSERT (!isnan (-zerod));
/* Infinite values. */
ASSERT (!isnan (1.0 / 0.0));
ASSERT (!isnan (-1.0 / 0.0));
/* Quiet NaN. */
- ASSERT (isnan (NaN ()));
+ ASSERT (isnan (NaNd ()));
#if defined DBL_EXPBIT0_WORD && defined DBL_EXPBIT0_BIT
/* Signalling NaN. */
{
- #define NWORDS \
+ #define NWORDSD \
((sizeof (double) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
- typedef union { double value; unsigned int word[NWORDS]; } memory_double;
+ typedef union { double value; unsigned int word[NWORDSD]; } memory_double;
memory_double m;
- m.value = NaN ();
+ 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 < NWORDS / 2 ? 1 : - 1)]
+ 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 < NWORDS / 2 ? 1 : - 1)]
+ 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 (1.0L / 0.0L));
+ ASSERT (!isnan (-1.0L / 0.0L));
+ /* 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_))
+/* 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;
}