diff --git a/src/ia32/interface-descriptors-ia32.cc b/src/ia32/interface-descriptors-ia32.cc
index 2748f90..8a877b1 100644
--- a/src/ia32/interface-descriptors-ia32.cc
+++ b/src/ia32/interface-descriptors-ia32.cc
@@ -51,16 +51,11 @@
 const Register StoreGlobalViaContextDescriptor::ValueRegister() { return eax; }
 
 
-const Register InstanceOfDescriptor::LeftRegister() { return edx; }
-const Register InstanceOfDescriptor::RightRegister() { return eax; }
-
-
 const Register StringCompareDescriptor::LeftRegister() { return edx; }
 const Register StringCompareDescriptor::RightRegister() { return eax; }
 
-
-const Register ApiGetterDescriptor::function_address() { return edx; }
-
+const Register ApiGetterDescriptor::HolderRegister() { return ecx; }
+const Register ApiGetterDescriptor::CallbackRegister() { return eax; }
 
 const Register MathPowTaggedDescriptor::exponent() { return eax; }
 
@@ -73,6 +68,8 @@
 const Register GrowArrayElementsDescriptor::ObjectRegister() { return eax; }
 const Register GrowArrayElementsDescriptor::KeyRegister() { return ebx; }
 
+const Register HasPropertyDescriptor::ObjectRegister() { return eax; }
+const Register HasPropertyDescriptor::KeyRegister() { return ebx; }
 
 void FastNewClosureDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
@@ -252,13 +249,16 @@
 SIMD128_TYPES(SIMD128_ALLOC_DESC)
 #undef SIMD128_ALLOC_DESC
 
-void AllocateInNewSpaceDescriptor::InitializePlatformSpecific(
+void ArrayNoArgumentConstructorDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
-  Register registers[] = {eax};
-  data->InitializePlatformSpecific(arraysize(registers), registers);
+  // register state
+  // eax -- number of arguments
+  // edi -- function
+  // ebx -- allocation site with elements kind
+  Register registers[] = {edi, ebx, eax};
+  data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
-
 void ArrayConstructorConstantArgCountDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   // register state
@@ -322,6 +322,11 @@
   data->InitializePlatformSpecific(arraysize(registers), registers, NULL);
 }
 
+void CountOpDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {eax};
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
 
 void StringAddDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
@@ -382,8 +387,8 @@
 void InterpreterDispatchDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      kInterpreterAccumulatorRegister, kInterpreterRegisterFileRegister,
-      kInterpreterBytecodeOffsetRegister, kInterpreterBytecodeArrayRegister };
+      kInterpreterAccumulatorRegister, kInterpreterBytecodeOffsetRegister,
+      kInterpreterBytecodeArrayRegister, kInterpreterDispatchTableRegister};
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
@@ -418,6 +423,16 @@
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+void ResumeGeneratorDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      eax,  // the value to pass to the generator
+      ebx,  // the JSGeneratorObject to resume
+      edx   // the resume mode (tagged)
+  };
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 }  // namespace internal
 }  // namespace v8