X87: [Interpreter] Add CallRuntime support to the interpreter.

src/x87/interface-descriptors-x87.cc

Index: src/x87/interface-descriptors-x87.cc
diff --git a/src/x87/interface-descriptors-x87.cc b/src/x87/interface-descriptors-x87.cc
index c394bfa1b90bf4cf86a72036f534a3b92ccbaa87..43f4a21588f748fd46721b14d422cc766a681a2e 100644
--- a/src/x87/interface-descriptors-x87.cc
+++ b/src/x87/interface-descriptors-x87.cc
@@ -407,16 +407,27 @@ void MathRoundVariantCallFromOptimizedCodeDescriptor::
 }
 
 
-void PushArgsAndCallDescriptor::InitializePlatformSpecific(
+void InterpreterPushArgsAndCallDescriptor::InitializePlatformSpecific(
     CallInterfaceDescriptorData* data) {
   Register registers[] = {
-      eax,  // argument count (including receiver)
+      eax,  // argument count (not including receiver)
       ebx,  // address of first argument
       edi   // the target callable to be call
   };
   data->InitializePlatformSpecific(arraysize(registers), registers);
 }
 
+
+void InterpreterCEntryDescriptor::InitializePlatformSpecific(
+    CallInterfaceDescriptorData* data) {
+  Register registers[] = {
+      eax,  // argument count (argc)
+      ecx,  // address of first argument (argv)
+      ebx   // the runtime function to call
+  };
+  data->InitializePlatformSpecific(arraysize(registers), registers);
+}
+
 }  // namespace internal
 }  // namespace v8