text: // Copyright 2012 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.
  
  #ifndef V8_X64_SIMULATOR_X64_H_
  #define V8_X64_SIMULATOR_X64_H_
  
  #include "src/allocation.h"
  
  namespace v8 {
  namespace internal {
  
  // Since there is no simulator for the x64 architecture the only thing we can
  // do is to call the entry directly.
  // TODO(X64): Don't pass p0, since it isn't used?
  #define CALL_GENERATED_CODE(entry, p0, p1, p2, p3, p4) \
    (entry(p0, p1, p2, p3, p4))
  
  typedef int (*regexp_matcher)(String*, int, const byte*,
                                const byte*, int*, int, Address, int, Isolate*);
  
  // Call the generated regexp code directly. The code at the entry address should
  // expect eight int/pointer sized arguments and return an int.
  #define CALL_GENERATED_REGEXP_CODE(entry, p0, p1, p2, p3, p4, p5, p6, p7, p8) \
    (FUNCTION_CAST<regexp_matcher>(entry)(p0, p1, p2, p3, p4, p5, p6, p7, p8))
  
  // The stack limit beyond which we will throw stack overflow errors in
  // generated code. Because generated code on x64 uses the C stack, we
  // just use the C stack limit.
  class SimulatorStack : public v8::internal::AllStatic {
   public:
    static inline uintptr_t JsLimitFromCLimit(Isolate* isolate,
                                              uintptr_t c_limit) {
      return c_limit;
    }
  
    static inline uintptr_t RegisterCTryCatch(uintptr_t try_catch_address) {
      return try_catch_address;
    }
  
    static inline void UnregisterCTryCatch() { }
  };
  
  } }  // namespace v8::internal
  
  #endif  // V8_X64_SIMULATOR_X64_H_
  