Replace the Alpha No op with a SPARC one.

--HG--
extra : convert_revision : bed03e63dc80bf24f21bad08e6553d7aab92c7b3

src/arch/sparc/isa_traits.hh

@@ -57,12 +57,11 @@ namespace SparcISA
     //This makes sure the big endian versions of certain functions are used.
     using namespace BigEndianGuest;
 
-    // Alpha Does NOT have a delay slot
+    // SPARC have a delay slot
     #define ISA_HAS_DELAY_SLOT 1
 
-    //TODO this needs to be a SPARC Noop
-    // Alpha UNOP (ldq_u r31,0(r0))
-    const MachInst NoopMachInst = 0x2ffe0000;
+    // SPARC NOP (sethi %(hi(0), g0)
+    const MachInst NoopMachInst = 0x01000000;
 
     const int NumIntRegs = 32;
     const int NumFloatRegs = 64;