Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 1 | // Copyright 2009 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_X64_REGISTER_ALLOCATOR_X64_INL_H_ |
| 29 | #define V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ |
| 30 | |
| 31 | #include "v8.h" |
| 32 | |
| 33 | namespace v8 { |
| 34 | namespace internal { |
| 35 | |
| 36 | // ------------------------------------------------------------------------- |
| 37 | // RegisterAllocator implementation. |
| 38 | |
| 39 | bool RegisterAllocator::IsReserved(Register reg) { |
| 40 | return reg.is(rsp) || reg.is(rbp) || reg.is(rsi) || |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame^] | 41 | reg.is(kScratchRegister) || reg.is(kRootRegister) || |
| 42 | reg.is(kSmiConstantRegister); |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 43 | } |
| 44 | |
| 45 | |
| 46 | // The register allocator uses small integers to represent the |
| 47 | // non-reserved assembler registers. |
| 48 | int RegisterAllocator::ToNumber(Register reg) { |
| 49 | ASSERT(reg.is_valid() && !IsReserved(reg)); |
| 50 | const int kNumbers[] = { |
| 51 | 0, // rax |
| 52 | 2, // rcx |
| 53 | 3, // rdx |
| 54 | 1, // rbx |
| 55 | -1, // rsp Stack pointer. |
| 56 | -1, // rbp Frame pointer. |
| 57 | -1, // rsi Context. |
| 58 | 4, // rdi |
| 59 | 5, // r8 |
| 60 | 6, // r9 |
| 61 | -1, // r10 Scratch register. |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame^] | 62 | 8, // r11 |
| 63 | 9, // r12 |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 64 | -1, // r13 Roots array. This is callee saved. |
| 65 | 7, // r14 |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame^] | 66 | -1 // r15 Smi constant register. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 67 | }; |
| 68 | return kNumbers[reg.code()]; |
| 69 | } |
| 70 | |
| 71 | |
| 72 | Register RegisterAllocator::ToRegister(int num) { |
| 73 | ASSERT(num >= 0 && num < kNumRegisters); |
| 74 | const Register kRegisters[] = |
Steve Block | 8defd9f | 2010-07-08 12:39:36 +0100 | [diff] [blame^] | 75 | { rax, rbx, rcx, rdx, rdi, r8, r9, r14, r11, r12 }; |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 76 | return kRegisters[num]; |
| 77 | } |
| 78 | |
| 79 | |
| 80 | void RegisterAllocator::Initialize() { |
| 81 | Reset(); |
| 82 | // The non-reserved rdi register is live on JS function entry. |
| 83 | Use(rdi); // JS function. |
| 84 | } |
| 85 | } } // namespace v8::internal |
| 86 | |
| 87 | #endif // V8_X64_REGISTER_ALLOCATOR_X64_INL_H_ |