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code.h
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27 
28 #ifndef V8_CODE_H_
29 #define V8_CODE_H_
30 
31 #include "allocation.h"
32 #include "handles.h"
33 #include "objects.h"
34 
35 namespace v8 {
36 namespace internal {
37 
38 
39 // Wrapper class for passing expected and actual parameter counts as
40 // either registers or immediate values. Used to make sure that the
41 // caller provides exactly the expected number of parameters to the
42 // callee.
43 class ParameterCount BASE_EMBEDDED {
44  public:
45  explicit ParameterCount(Register reg)
46  : reg_(reg), immediate_(0) { }
47  explicit ParameterCount(int immediate)
48  : reg_(no_reg), immediate_(immediate) { }
50  : reg_(no_reg), immediate_(f->shared()->formal_parameter_count()) { }
51 
52  bool is_reg() const { return !reg_.is(no_reg); }
53  bool is_immediate() const { return !is_reg(); }
54 
55  Register reg() const {
56  ASSERT(is_reg());
57  return reg_;
58  }
59  int immediate() const {
60  ASSERT(is_immediate());
61  return immediate_;
62  }
63 
64  private:
65  const Register reg_;
66  const int immediate_;
67 
68  DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount);
69 };
70 
71 
72 } } // namespace v8::internal
73 
74 #endif // V8_CODE_H_
ParameterCount(Handle< JSFunction > f)
Definition: code.h:49
#define ASSERT(condition)
Definition: checks.h:329
int immediate() const
Definition: code.h:59
ParameterCount(Register reg)
Definition: code.h:45
#define DISALLOW_IMPLICIT_CONSTRUCTORS(TypeName)
Definition: globals.h:370
bool is_reg() const
Definition: code.h:52
#define BASE_EMBEDDED
Definition: allocation.h:68
Register reg() const
Definition: code.h:55
ParameterCount(int immediate)
Definition: code.h:47
kInstanceClassNameOffset kNeedsAccessCheckBit kRemovePrototypeBit kIsExpressionBit kAllowLazyCompilation kUsesArguments formal_parameter_count
Definition: objects-inl.h:5190
bool is_immediate() const
Definition: code.h:53
const Register no_reg