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