For MADD et.al. instructions sign extend 32 bit result assigned to a

register.

sim/mips/ChangeLog

@@ -1,4 +1,11 @@
 start-sanitize-vr5400
+Sat Dec 13 15:18:51 1997  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* vr5400.igen (Low32Bits, High32Bits): Sign extend extracted 32
+ 	bit values.
+
+end-sanitize-vr5400
+start-sanitize-vr5400
 Fri Dec 12 12:26:07 1997  Jeffrey A Law  (law@cygnus.com)
 
 	* configure.in (sim_igen_filter): Multi-sim vr5000 - vr5000 or

sim/mips/vr5400.igen

@@ -35,13 +35,13 @@
 
 :function:::unsigned64:Low32Bits:unsigned64 value
 {
-  unsigned64 result = VL4_8 (value);
+  unsigned64 result = (signed64) (signed32) VL4_8 (value);
   return result;
 }
 
 :function:::unsigned64:High32Bits:unsigned64 value
 {
-  unsigned64 result = VH4_8 (value);
+  unsigned64 result = (signed64) (signed32) VH4_8 (value);
   return result;
 }