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_ARM_REGISTER_ALLOCATOR_ARM_INL_H_ 29#define V8_ARM_REGISTER_ALLOCATOR_ARM_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(cp) || reg.is(fp) || reg.is(sp) || reg.is(pc); 41} 42 43 44 45// The register allocator uses small integers to represent the 46// non-reserved assembler registers. The mapping is: 47// 48// r0 <-> 0 49// r1 <-> 1 50// r2 <-> 2 51// r3 <-> 3 52// r4 <-> 4 53// r5 <-> 5 54// r6 <-> 6 55// r7 <-> 7 56// r9 <-> 8 57// r10 <-> 9 58// ip <-> 10 59// lr <-> 11 60 61int RegisterAllocator::ToNumber(Register reg) { 62 ASSERT(reg.is_valid() && !IsReserved(reg)); 63 const int kNumbers[] = { 64 0, // r0 65 1, // r1 66 2, // r2 67 3, // r3 68 4, // r4 69 5, // r5 70 6, // r6 71 7, // r7 72 -1, // cp 73 8, // r9 74 9, // r10 75 -1, // fp 76 10, // ip 77 -1, // sp 78 11, // lr 79 -1 // pc 80 }; 81 return kNumbers[reg.code()]; 82} 83 84 85Register RegisterAllocator::ToRegister(int num) { 86 ASSERT(num >= 0 && num < kNumRegisters); 87 const Register kRegisters[] = 88 { r0, r1, r2, r3, r4, r5, r6, r7, r9, r10, ip, lr }; 89 return kRegisters[num]; 90} 91 92 93void RegisterAllocator::Initialize() { 94 Reset(); 95 // The non-reserved r1 and lr registers are live on JS function entry. 96 Use(r1); // JS function. 97 Use(lr); // Return address. 98} 99 100 101} } // namespace v8::internal 102 103#endif // V8_ARM_REGISTER_ALLOCATOR_ARM_INL_H_ 104