X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-isnan.c;h=d1d05dcea42a6d3a10780175a3fb83184c70a838;hb=d913c90f6a01f889db65cbb516683aab2f28c533;hp=445c30a3f53cc7b50d69a1f67523350791a96bc0;hpb=f4a519da138fc11be756d442a893e2b54a07cece;p=gnulib.git

diff --git a/tests/test-isnan.c b/tests/test-isnan.c
index 445c30a3f..d1d05dcea 100644
--- a/tests/test-isnan.c
+++ b/tests/test-isnan.c
@@ -1,10 +1,10 @@
-/* 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
+   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 2, or (at your option)
-   any later version.
+   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
@@ -12,22 +12,92 @@
    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, write to the Free Software Foundation,
-   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
-/* Written by Bruno Haible <bruno@clisp.org>, 2007.  */
+/* Written by Ben Pfaff <blp@cs.stanford.edu>, from code by Bruno
+   Haible <bruno@clisp.org>.  */
 
 #include <config.h>
 
-#include "isnan.h"
+#include <math.h>
 
+/* isnan must be a macro.  */
+#ifndef isnan
+# error missing declaration
+#endif
+
+#include <float.h>
 #include <limits.h>
-#include <stdlib.h>
 
-#define ASSERT(expr) if (!(expr)) abort ();
+#include "nan.h"
+#include "macros.h"
 
-int
-main ()
+/* 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)
+{
+  return -LDBL_MIN * LDBL_MIN;
+}
+# define minus_zerol compute_minus_zerol ()
+#else
+long double minus_zerol = -0.0L;
+#endif
+
+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));
@@ -36,29 +106,139 @@ main ()
   ASSERT (!isnan (-2.718));
   ASSERT (!isnan (-2.718e30));
   ASSERT (!isnan (-2.718e-30));
+  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 (0.0 / 0.0));
+  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 = 0.0 / 0.0;
+    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;
 }