| // 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_X64_REGISTER_ALLOCATOR_X64_INL_H_ |
| #define V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ |
| |
| #include "v8.h" |
| |
| namespace v8 { |
| namespace internal { |
| |
| // ------------------------------------------------------------------------- |
| // RegisterAllocator implementation. |
| |
| bool RegisterAllocator::IsReserved(Register reg) { |
| return reg.is(rsp) || reg.is(rbp) || reg.is(rsi) || |
| reg.is(kScratchRegister) || reg.is(kRootRegister) || |
| reg.is(kSmiConstantRegister); |
| } |
| |
| |
| // The register allocator uses small integers to represent the |
| // non-reserved assembler registers. |
| int RegisterAllocator::ToNumber(Register reg) { |
| ASSERT(reg.is_valid() && !IsReserved(reg)); |
| const int kNumbers[] = { |
| 0, // rax |
| 2, // rcx |
| 3, // rdx |
| 1, // rbx |
| -1, // rsp Stack pointer. |
| -1, // rbp Frame pointer. |
| -1, // rsi Context. |
| 4, // rdi |
| 5, // r8 |
| 6, // r9 |
| -1, // r10 Scratch register. |
| 8, // r11 |
| 9, // r12 |
| -1, // r13 Roots array. This is callee saved. |
| 7, // r14 |
| -1 // r15 Smi constant register. |
| }; |
| return kNumbers[reg.code()]; |
| } |
| |
| |
| Register RegisterAllocator::ToRegister(int num) { |
| ASSERT(num >= 0 && num < kNumRegisters); |
| const Register kRegisters[] = |
| { rax, rbx, rcx, rdx, rdi, r8, r9, r14, r11, r12 }; |
| return kRegisters[num]; |
| } |
| |
| |
| void RegisterAllocator::Initialize() { |
| Reset(); |
| // The non-reserved rdi register is live on JS function entry. |
| Use(rdi); // JS function. |
| } |
| } } // namespace v8::internal |
| |
| #endif // V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ |