| // Copyright 2009 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #ifndef V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_ |
| #define V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_ |
| |
| #include "v8.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ------------------------------------------------------------------------- |
| // RegisterAllocator implementation. |
| |
| bool RegisterAllocator::IsReserved(Register reg) { |
| // The code for this test relies on the order of register codes. |
| return reg.code() >= esp.code() && reg.code() <= esi.code(); |
| } |
| |
| |
| // The register allocator uses small integers to represent the |
| // non-reserved assembler registers. The mapping is: |
| |
| // eax <-> 0, ebx <-> 1, ecx <-> 2, edx <-> 3, edi <-> 4. |
| |
| int RegisterAllocator::ToNumber(Register reg) { |
| ASSERT(reg.is_valid() && !IsReserved(reg)); |
| const int kNumbers[] = { |
| 0, // eax |
| 2, // ecx |
| 3, // edx |
| 1, // ebx |
| -1, // esp |
| -1, // ebp |
| -1, // esi |
| 4 // edi |
| }; |
| return kNumbers[reg.code()]; |
| } |
| |
| |
| Register RegisterAllocator::ToRegister(int num) { |
| ASSERT(num >= 0 && num < kNumRegisters); |
| const Register kRegisters[] = { eax, ebx, ecx, edx, edi }; |
| return kRegisters[num]; |
| } |
| |
| |
| void RegisterAllocator::Initialize() { |
| Reset(); |
| // The non-reserved edi register is live on JS function entry. |
| Use(edi); // JS function. |
| } |
| |
| |
| } } // namespace v8::internal |
| |
| #endif // V8_IA32_REGISTER_ALLOCATOR_IA32_INL_H_ |