X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fisnanl.m4;h=0f425a11db30cc300dfe5e64a1ff443ed0ab466d;hb=82afcdd;hp=de7eafb04976fa63ea758423e5c4fb88274a372b;hpb=64865499c9cf8748356a0857a8481d74b394bd79;p=gnulib.git

diff --git a/m4/isnanl.m4 b/m4/isnanl.m4
index de7eafb04..0f425a11d 100644
--- a/m4/isnanl.m4
+++ b/m4/isnanl.m4
@@ -1,4 +1,4 @@
-# isnanl.m4 serial 13
+# isnanl.m4 serial 14
 dnl Copyright (C) 2007-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -151,22 +151,26 @@ static long double NaNl ()
 #endif
 int main ()
 {
-  memory_long_double m;
-  unsigned int i;
+  int result = 0;
 
   if (!isnanl (NaNl ()))
-    return 1;
+    result |= 1;
 
-  /* The isnanl function should be immune against changes in the sign bit and
-     in the mantissa bits.  The xor operation twiddles a bit that can only be
-     a sign bit or a mantissa bit (since the exponent never extends to
-     bit 31).  */
-  m.value = NaNl ();
-  m.word[NWORDS / 2] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
-  for (i = 0; i < NWORDS; i++)
-    m.word[i] |= 1;
-  if (!isnanl (m.value))
-    return 1;
+  {
+    memory_long_double m;
+    unsigned int i;
+
+    /* The isnanl function should be immune against changes in the sign bit and
+       in the mantissa bits.  The xor operation twiddles a bit that can only be
+       a sign bit or a mantissa bit (since the exponent never extends to
+       bit 31).  */
+    m.value = NaNl ();
+    m.word[NWORDS / 2] ^= (unsigned int) 1 << (sizeof (unsigned int) * CHAR_BIT - 1);
+    for (i = 0; i < NWORDS; i++)
+      m.word[i] |= 1;
+    if (!isnanl (m.value))
+      result |= 1;
+  }
 
 #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
@@ -185,14 +189,14 @@ int main ()
     static memory_long_double x =
       { LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 2;
   }
   {
     /* Signalling NaN.  */
     static memory_long_double x =
       { LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 2;
   }
   /* The isnanl function should recognize Pseudo-NaNs, Pseudo-Infinities,
      Pseudo-Zeroes, Unnormalized Numbers, and Pseudo-Denormals, as defined in
@@ -205,35 +209,35 @@ int main ()
     static memory_long_double x =
       { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 4;
   }
   { /* Pseudo-Infinity.  */
     static memory_long_double x =
       { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 8;
   }
   { /* Pseudo-Zero.  */
     static memory_long_double x =
       { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 16;
   }
   { /* Unnormalized number.  */
     static memory_long_double x =
       { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 32;
   }
   { /* Pseudo-Denormal.  */
     static memory_long_double x =
       { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
     if (!isnanl (x.value))
-      return 1;
+      result |= 64;
   }
 #endif
 
-  return 0;
+  return result;
 }]])],
         [gl_cv_func_isnanl_works=yes],
         [gl_cv_func_isnanl_works=no],