Merge pull request #412 from DrChat/vrsave

Don't assert on VRSAVE mfspr/mtspr (used by gcc)

src/xenia/cpu/frontend/ppc_emit_control.cc

@@ -593,6 +593,10 @@ XEEMITTER(mfspr, 0x7C0002A6, XFX)(PPCHIRBuilder& f, InstrData& i) {
       // CTR
       v = f.LoadCTR();
       break;
+    case 256:
+      // VRSAVE
+      v = f.LoadZeroInt64();
+      break;
     case 268:
       // TB
       v = f.LoadClock();
@@ -678,6 +682,9 @@ XEEMITTER(mtspr, 0x7C0003A6, XFX)(PPCHIRBuilder& f, InstrData& i) {
       // CTR
       f.StoreCTR(rt);
       break;
+    case 256:
+      // VRSAVE
+      break;
     default:
       XEINSTRNOTIMPLEMENTED();
       return 1;