unwind-arm.c (selfrel_offset31): Clear top bit for positive offsets.

2006-09-20  Paul Brook  <paul@codesourcery.com>

	gcc/
	* config/arm/unwind-arm.c (selfrel_offset31): Clear top bit for
	positive offsets.

From-SVN: r117087

gcc/ChangeLog

+2006-09-20  Paul Brook  <paul@codesourcery.com>
+
+	gcc/
+	* config/arm/unwind-arm.c (selfrel_offset31): Clear top bit for
+	positive offsets.
+
 2006-09-20  Janis Johnson  <janis187@us.ibm.com>
 
 	* doc/extend.texi (Decimal Float): Update for latest draft TR,

gcc/config/arm/unwind-arm.c

@@ -337,6 +337,8 @@ selfrel_offset31 (const _uw *p)
   /* Sign extend to 32 bits.  */
   if (offset & (1 << 30))
     offset |= 1u << 31;
+  else
+    offset &= ~(1u << 31);
 
   return offset + (_uw) p;
 }