diff --git a/src/alloy/frontend/ppc/ppc_emit_alu.cc b/src/alloy/frontend/ppc/ppc_emit_alu.cc
index 3ed1a002b..8ead6733b 100644
--- a/src/alloy/frontend/ppc/ppc_emit_alu.cc
+++ b/src/alloy/frontend/ppc/ppc_emit_alu.cc
@@ -692,11 +692,6 @@ XEEMITTER(cntlzwx,      0x7C000034, X  )(PPCFunctionBuilder& f, InstrData& i) {
 
 XEEMITTER(eqvx,         0x7C000238, X  )(PPCFunctionBuilder& f, InstrData& i) {
   // RA <- (RS) == (RB)
-
-  // UNTESTED: ensure this is correct.
-  XEASSERTALWAYS();
-  f.DebugBreak();
-
   Value* ra = f.Xor(f.LoadGPR(i.X.RT), f.LoadGPR(i.X.RB));
   ra = f.Not(ra);
   if (i.X.Rc) {
diff --git a/src/alloy/frontend/ppc/ppc_emit_control.cc b/src/alloy/frontend/ppc/ppc_emit_control.cc
index 45b12649b..99540a993 100644
--- a/src/alloy/frontend/ppc/ppc_emit_control.cc
+++ b/src/alloy/frontend/ppc/ppc_emit_control.cc
@@ -546,6 +546,24 @@ XEEMITTER(mtspr,        0x7C0003A6, XFX)(PPCFunctionBuilder& f, InstrData& i) {
   return 0;
 }
 
+// TODO(benvanik): MSR is used for toggling interrupts, and it'd be nice to
+//                 obey that setting. It's usually guarding atomic stores.
+
+XEEMITTER(mfmsr,        0x7C0000A6, X  )(PPCFunctionBuilder& f, InstrData& i) {
+  f.Nop();
+  return 0;
+}
+
+XEEMITTER(mtmsr,        0x7C000124, X  )(PPCFunctionBuilder& f, InstrData& i) {
+  f.Nop();
+  return 0;
+}
+
+XEEMITTER(mtmsrd,       0x7C000164, X  )(PPCFunctionBuilder& f, InstrData& i) {
+  f.Nop();
+  return 0;
+}
+
 
 void RegisterEmitCategoryControl() {
   XEREGISTERINSTR(bx,           0x48000000);
@@ -571,6 +589,9 @@ void RegisterEmitCategoryControl() {
   XEREGISTERINSTR(mftb,         0x7C0002E6);
   XEREGISTERINSTR(mtcrf,        0x7C000120);
   XEREGISTERINSTR(mtspr,        0x7C0003A6);
+  XEREGISTERINSTR(mfmsr,        0x7C0000A6);
+  XEREGISTERINSTR(mtmsr,        0x7C000124);
+  XEREGISTERINSTR(mtmsrd,       0x7C000164);
 }