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

diff --git a/gcc/dfp.c b/gcc/dfp.c
index e2e90c4..6e43d14 100644 (file)
--- a/gcc/dfp.c
+++ b/gcc/dfp.c
@@ -1,6 +1,6 @@
 /* Decimal floating point support.
-   Copyright (C) 2005, 2006, 2007, 2008, 2009 Free Software
-   Foundation, Inc.
+   Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011
+   Free Software Foundation, Inc.
 
 This file is part of GCC.
 
@@ -23,7 +23,6 @@ along with GCC; see the file COPYING3.  If not see
 #include "coretypes.h"
 #include "tm.h"
 #include "tree.h"
-#include "toplev.h"
 #include "tm_p.h"
 #include "dfp.h"
 
@@ -111,7 +110,33 @@ decimal_to_decnumber (const REAL_VALUE_TYPE *r, decNumber *dn)
         decNumberFromString (dn, "nan", &set);
       break;
     case rvc_normal:
-      gcc_assert (r->decimal);
+      if (!r->decimal)
+       {
+         /* dconst{1,2,m1,half} are used in various places in
+            the middle-end and optimizers, allow them here
+            as an exception by converting them to decimal.  */
+         if (memcmp (r, &dconst1, sizeof (*r)) == 0)
+           {
+             decNumberFromString (dn, "1", &set);
+             break;
+           }
+         if (memcmp (r, &dconst2, sizeof (*r)) == 0)
+           {
+             decNumberFromString (dn, "2", &set);
+             break;
+           }
+         if (memcmp (r, &dconstm1, sizeof (*r)) == 0)
+           {
+             decNumberFromString (dn, "-1", &set);
+             break;
+           }
+         if (memcmp (r, &dconsthalf, sizeof (*r)) == 0)
+           {
+             decNumberFromString (dn, "0.5", &set);
+             break;
+           }
+         gcc_unreachable ();
+       }
       decimal128ToNumber ((const decimal128 *) r->sig, dn);
       break;
     default: