[Interpreter] Add CallRuntime support to the interpreter.

src/x64/code-stubs-x64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/ic/handler-compiler.h"
@@ skipping 2250 matching lines @@
   save_doubles.GetCode();
 }
 
 
 void CEntryStub::Generate(MacroAssembler* masm) {
   // rax: number of arguments including receiver
   // rbx: pointer to C function  (C callee-saved)
   // rbp: frame pointer of calling JS frame (restored after C call)
   // rsp: stack pointer  (restored after C call)
   // rsi: current context (restored)
+  //
+  // If argv_in_register():
+  // r15: pointer to the first argument
 
   ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
   // Enter the exit frame that transitions from JavaScript to C++.
 #ifdef _WIN64
   int arg_stack_space = (result_size() < 2 ? 2 : 4);
 #else   // _WIN64
   int arg_stack_space = 0;
 #endif  // _WIN64
-  __ EnterExitFrame(arg_stack_space, save_doubles());
+  if (argv_in_register()) {
+    DCHECK(!save_doubles());
+    __ EnterApiExitFrame(arg_stack_space);
+    // Move argc into r14 (argv is already in r15).
+    __ movp(r14, rax);
+  } else {
+    __ EnterExitFrame(arg_stack_space, save_doubles());
+  }
 
   // rbx: pointer to builtin function  (C callee-saved).
   // rbp: frame pointer of exit frame  (restored after C call).
   // rsp: stack pointer (restored after C call).
   // r14: number of arguments including receiver (C callee-saved).
   // r15: argv pointer (C callee-saved).
 
   // Simple results returned in rax (both AMD64 and Win64 calling conventions).
   // Complex results must be written to address passed as first argument.
   // AMD64 calling convention: a struct of two pointers in rax+rdx
@@ skipping 3275 matching lines @@
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64