Fixes for checker. The RC/RS instructions check the interrupt flag, which isn't verifiable by the checker.

src/arch/alpha/isa/decoder.isa:
src/cpu/checker/cpu.cc:
    Fixes for checker.

--HG--
extra : convert_revision : b0ec8f3c4a10453a567cd6691283fc498403795e

src/arch/alpha/isa/decoder.isa

@@ -659,11 +659,11 @@ decode OPCODE default Unknown::unknown() {
             0xe000: rc({{
                 Ra = xc->readIntrFlag();
                 xc->setIntrFlag(0);
-            }}, IsNonSpeculative);
+            }}, IsNonSpeculative, IsUnverifiable);
             0xf000: rs({{
                 Ra = xc->readIntrFlag();
                 xc->setIntrFlag(1);
-            }}, IsNonSpeculative);
+            }}, IsNonSpeculative, IsUnverifiable);
         }
 #else
         format FailUnimpl {

src/cpu/checker/cpu.cc

@@ -84,6 +84,8 @@ CheckerCPU::CheckerCPU(Params *p)
 #else
     process = p->process;
 #endif
+
+    result.integer = 0;
 }
 
 CheckerCPU::~CheckerCPU()