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[pf3gnuchains/gcc-fork.git] / gcc / c-cppbuiltin.c

diff --git a/gcc/c-cppbuiltin.c b/gcc/c-cppbuiltin.c
index c20e987..06904db 100644 (file)
--- a/gcc/c-cppbuiltin.c
+++ b/gcc/c-cppbuiltin.c
@@ -1,5 +1,5 @@
 /* Define builtin-in macros for the C family front ends.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -219,7 +219,12 @@ builtin_define_float_constants (const char *name_prefix, const char *fp_suffix,
   /* The difference between 1 and the least value greater than 1 that is
      representable in the given floating point type, b**(1-p).  */
   sprintf (name, "__%s_EPSILON__", name_prefix);
-  sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b);
+  if (fmt->pnan < fmt->p)
+    /* This is an IBM extended double format, so 1.0 + any double is
+       representable precisely.  */
+      sprintf (buf, "0x1p%d", (fmt->emin - fmt->p) * fmt->log2_b);
+    else      
+      sprintf (buf, "0x1p%d", (1 - fmt->p) * fmt->log2_b);
   builtin_define_with_hex_fp_value (name, type, decimal_dig, buf, fp_suffix);
 
   /* For C++ std::numeric_limits<T>::denorm_min.  The minimum denormalized
@@ -259,7 +264,7 @@ define__GNUC__ (void)
      ([^0-9]*-)?[0-9]+[.][0-9]+([.][0-9]+)?([- ].*)?  */
   const char *q, *v = version_string;
 
-  while (*v && ! ISDIGIT (*v))
+  while (*v && !ISDIGIT (*v))
     v++;
   gcc_assert (*v && (v <= version_string || v[-1] == '-'));
 
@@ -270,7 +275,7 @@ define__GNUC__ (void)
   if (c_dialect_cxx ())
     builtin_define_with_value_n ("__GNUG__", q, v - q);
 
-  gcc_assert (*v == '.' || ISDIGIT (v[1]));
+  gcc_assert (*v == '.' && ISDIGIT (v[1]));
   
   q = ++v;
   while (ISDIGIT (*v))
@@ -347,7 +352,7 @@ c_cpp_builtins (cpp_reader *pfile)
        different from system to system.  */
     builtin_define_with_int_value ("__GXX_ABI_VERSION", 999999);
   else if (flag_abi_version == 1)
-    /* Due to an historical accident, this version had the value
+    /* Due to a historical accident, this version had the value
        "102".  */
     builtin_define_with_int_value ("__GXX_ABI_VERSION", 102);
   else