Direct call C++ functions

src/x64/virtual-frame-x64.cc

Index: src/x64/virtual-frame-x64.cc
===================================================================
--- src/x64/virtual-frame-x64.cc	(revision 3911)
+++ src/x64/virtual-frame-x64.cc	(working copy)
@@ -976,9 +976,41 @@
 
 
 Result VirtualFrame::CallRuntime(Runtime::Function* f, int arg_count) {
-  PrepareForCall(arg_count, arg_count);
-  ASSERT(cgen()->HasValidEntryRegisters());
-  __ CallRuntime(f, arg_count);
+  if (Runtime::DIRECT_CALL_NOT_FAILS == f->calling_convention) {
+    ASSERT(height() >= arg_count);
+    if (arg_count > kCArgRegsCount) {
+      Forget(arg_count);
+      return Result(Factory::undefined_value());
+    }
+
+    for (int i = arg_count - 1; i >= 0; i--) {
+      Result arg = Pop();
+      Register reg = kCArgRegs[i];
+      if (RegisterAllocator::IsReserved(reg)) {
+        arg.ToRegister();
+        __ movq(reg, arg.reg());
+        arg.Unuse();
+      } else {
+        arg.ToRegister(reg);
+        arg.Unuse();
+      }
+    }
+
+    // TODO(serya): do not spill out C callee saved registers
+    PrepareForCall(0, 0);
+
+    ASSERT(cgen()->HasValidEntryRegisters());
+    __ CallRuntime(f, arg_count);
+    if ((1 << rsi.code()) & kCCallerSaved) {
+      RestoreContextRegister();
+    }
+  } else {
+    ASSERT(Runtime::EXIT_FRAME_CALL == f->calling_convention);
+    PrepareForCall(arg_count, arg_count);
+    ASSERT(cgen()->HasValidEntryRegisters());
+    __ CallRuntime(f, arg_count);
+  }
+
   Result result = cgen()->allocator()->Allocate(rax);
   ASSERT(result.is_valid());
   return result;
@@ -986,12 +1018,7 @@
 
 
 Result VirtualFrame::CallRuntime(Runtime::FunctionId id, int arg_count) {
-  PrepareForCall(arg_count, arg_count);
-  ASSERT(cgen()->HasValidEntryRegisters());
-  __ CallRuntime(id, arg_count);
-  Result result = cgen()->allocator()->Allocate(rax);
-  ASSERT(result.is_valid());
-  return result;
+  return CallRuntime(Runtime::FunctionForId(id), arg_count);
 }