Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2006-2008 the V8 project authors. All rights reserved. |
| 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_CODE_H_ |
| 29 | #define V8_CODE_H_ |
| 30 | |
| 31 | namespace v8 { |
| 32 | namespace internal { |
| 33 | |
| 34 | |
| 35 | // Wrapper class for passing expected and actual parameter counts as |
| 36 | // either registers or immediate values. Used to make sure that the |
| 37 | // caller provides exactly the expected number of parameters to the |
| 38 | // callee. |
| 39 | class ParameterCount BASE_EMBEDDED { |
| 40 | public: |
| 41 | explicit ParameterCount(Register reg) |
| 42 | : reg_(reg), immediate_(0) { } |
| 43 | explicit ParameterCount(int immediate) |
| 44 | : reg_(no_reg), immediate_(immediate) { } |
| 45 | |
| 46 | bool is_reg() const { return !reg_.is(no_reg); } |
| 47 | bool is_immediate() const { return !is_reg(); } |
| 48 | |
| 49 | Register reg() const { |
| 50 | ASSERT(is_reg()); |
| 51 | return reg_; |
| 52 | } |
| 53 | int immediate() const { |
| 54 | ASSERT(is_immediate()); |
| 55 | return immediate_; |
| 56 | } |
| 57 | |
| 58 | private: |
| 59 | const Register reg_; |
| 60 | const int immediate_; |
| 61 | |
| 62 | DISALLOW_IMPLICIT_CONSTRUCTORS(ParameterCount); |
| 63 | }; |
| 64 | |
| 65 | |
| 66 | } } // namespace v8::internal |
| 67 | |
| 68 | #endif // V8_CODE_H_ |