| // Copyright 2006-2008 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_CODE_H_ |
| #define V8_CODE_H_ |
| |
| #include "src/allocation.h" |
| #include "src/handles.h" |
| #include "src/objects.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| |
| // Wrapper class for passing expected and actual parameter counts as |
| // either registers or immediate values. Used to make sure that the |
| // caller provides exactly the expected number of parameters to the |
| // callee. |
| class ParameterCount BASE_EMBEDDED { |
| public: |
| explicit ParameterCount(Register reg) |
| : reg_(reg), immediate_(0) { } |
| explicit ParameterCount(int immediate) |
| : reg_(no_reg), immediate_(immediate) { } |
| explicit ParameterCount(Handle<JSFunction> f) |
| : reg_(no_reg), immediate_(f->shared()->formal_parameter_count()) { } |
| |
| bool is_reg() const { return !reg_.is(no_reg); } |
| bool is_immediate() const { return !is_reg(); } |
| |
| Register reg() const { |
| DCHECK(is_reg()); |
| return reg_; |
| } |
| int immediate() const { |
| DCHECK(is_immediate()); |
| return immediate_; |
| } |
| |
| private: |
| const Register reg_; |
| const int immediate_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount); |
| }; |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_CODE_H_ |