macro-assembler-arm.cc revision 25f6136652d8341ed047e7fc1a450af5bd218ea9
1a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Copyright 2006-2009 the V8 project authors. All rights reserved. 2a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Redistribution and use in source and binary forms, with or without 3a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// modification, are permitted provided that the following conditions are 4a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// met: 5a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 6a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions of source code must retain the above copyright 7a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// notice, this list of conditions and the following disclaimer. 8a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Redistributions in binary form must reproduce the above 9a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// copyright notice, this list of conditions and the following 10a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// disclaimer in the documentation and/or other materials provided 11a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// with the distribution. 12a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// * Neither the name of Google Inc. nor the names of its 13a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// contributors may be used to endorse or promote products derived 14a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// from this software without specific prior written permission. 15a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// 16a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 28a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "v8.h" 29a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 30a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "bootstrapper.h" 31a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "codegen-inl.h" 32a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "debug.h" 33a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#include "runtime.h" 34a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 35a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace v8 { 36a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blocknamespace internal { 37a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 38a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockMacroAssembler::MacroAssembler(void* buffer, int size) 39a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block : Assembler(buffer, size), 40a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block generating_stub_(false), 41a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block allow_stub_calls_(true), 42a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block code_object_(Heap::undefined_value()) { 43a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 44a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 45a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 46a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// We always generate arm code, never thumb code, even if V8 is compiled to 47a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// thumb, so we require inter-working support 48a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if defined(__thumb__) && !defined(USE_THUMB_INTERWORK) 49a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#error "flag -mthumb-interwork missing" 50a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 51a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 52a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 53a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// We do not support thumb inter-working with an arm architecture not supporting 54a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// the blx instruction (below v5t). If you know what CPU you are compiling for 55a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// you can use -march=armv7 or similar. 56a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if defined(USE_THUMB_INTERWORK) && !defined(CAN_USE_THUMB_INSTRUCTIONS) 57a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block# error "For thumb inter-working we require an architecture which supports blx" 58a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 59a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 60a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 61a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block// Using bx does not yield better code, so use it only when required 62a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if defined(USE_THUMB_INTERWORK) 63a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#define USE_BX 1 64a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 65a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 66a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 67a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Jump(Register target, Condition cond) { 68a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if USE_BX 69a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bx(target, cond); 70a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 71a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(pc, Operand(target), LeaveCC, cond); 72a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 73a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 74a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 75a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 76a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Jump(intptr_t target, RelocInfo::Mode rmode, 77a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 78a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if USE_BX 79a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(target, rmode), LeaveCC, cond); 80a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bx(ip, cond); 81a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 82a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(pc, Operand(target, rmode), LeaveCC, cond); 83a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 84a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 85a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 86a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 87a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Jump(byte* target, RelocInfo::Mode rmode, 88a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 89a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!RelocInfo::IsCodeTarget(rmode)); 90a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(reinterpret_cast<intptr_t>(target), rmode, cond); 91a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 92a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 93a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 94a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode, 95a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 96a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(RelocInfo::IsCodeTarget(rmode)); 97a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // 'code' is always generated ARM code, never THUMB code 98a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(reinterpret_cast<intptr_t>(code.location()), rmode, cond); 99a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 100a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 101a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 102a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Call(Register target, Condition cond) { 103a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if USE_BLX 104a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block blx(target, cond); 105a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 106a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // set lr for return at current pc + 8 107a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(lr, Operand(pc), LeaveCC, cond); 108a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(pc, Operand(target), LeaveCC, cond); 109a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 110a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 111a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 112a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 113a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Call(intptr_t target, RelocInfo::Mode rmode, 114a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 1156ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#if USE_BLX 1166ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // On ARMv5 and after the recommended call sequence is: 1176ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // ldr ip, [pc, #...] 1186ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // blx ip 1196ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1206ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // The two instructions (ldr and blx) could be separated by a constant 1216ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // pool and the code would still work. The issue comes from the 1226ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // patching code which expect the ldr to be just above the blx. 1236ded16be15dd865a9b21ea304d5273c8be299c87Steve Block { BlockConstPoolScope block_const_pool(this); 1246ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Statement positions are expected to be recorded when the target 1256ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // address is loaded. The mov method will automatically record 1266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // positions when pc is the target, since this is not the case here 1276ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // we have to do it explicitly. 1286ded16be15dd865a9b21ea304d5273c8be299c87Steve Block WriteRecordedPositions(); 1296ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(ip, Operand(target, rmode), LeaveCC, cond); 1316ded16be15dd865a9b21ea304d5273c8be299c87Steve Block blx(ip, cond); 1326ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 1336ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1346ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(kCallTargetAddressOffset == 2 * kInstrSize); 1356ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#else 136a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Set lr for return at current pc + 8. 137a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(lr, Operand(pc), LeaveCC, cond); 138a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Emit a ldr<cond> pc, [pc + offset of target in constant pool]. 139a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(pc, Operand(target, rmode), LeaveCC, cond); 1406ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 141a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(kCallTargetAddressOffset == kInstrSize); 1426ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#endif 143a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 144a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 145a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 146a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Call(byte* target, RelocInfo::Mode rmode, 147a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 148a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!RelocInfo::IsCodeTarget(rmode)); 149a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(reinterpret_cast<intptr_t>(target), rmode, cond); 150a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 151a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 152a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 153a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Call(Handle<Code> code, RelocInfo::Mode rmode, 154a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 155a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(RelocInfo::IsCodeTarget(rmode)); 156a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // 'code' is always generated ARM code, never THUMB code 157a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(reinterpret_cast<intptr_t>(code.location()), rmode, cond); 158a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 159a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 160a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 161a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Ret(Condition cond) { 162a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if USE_BX 163a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bx(lr, cond); 164a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else 165a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(pc, Operand(lr), LeaveCC, cond); 166a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 167a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 168a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 169a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 170d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid MacroAssembler::StackLimitCheck(Label* on_stack_overflow) { 171d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block LoadRoot(ip, Heap::kStackLimitRootIndex); 172d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block cmp(sp, Operand(ip)); 173d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block b(lo, on_stack_overflow); 174d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block} 175d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 176d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 177e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevoid MacroAssembler::Drop(int count, Condition cond) { 178e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke if (count > 0) { 179e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke add(sp, sp, Operand(count * kPointerSize), LeaveCC, cond); 180e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke } 181e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke} 182e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 183e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 1846ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::Swap(Register reg1, Register reg2, Register scratch) { 1856ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (scratch.is(no_reg)) { 1866ded16be15dd865a9b21ea304d5273c8be299c87Steve Block eor(reg1, reg1, Operand(reg2)); 1876ded16be15dd865a9b21ea304d5273c8be299c87Steve Block eor(reg2, reg2, Operand(reg1)); 1886ded16be15dd865a9b21ea304d5273c8be299c87Steve Block eor(reg1, reg1, Operand(reg2)); 1896ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } else { 1906ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, reg1); 1916ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(reg1, reg2); 1926ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(reg2, scratch); 1936ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 1946ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 1956ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1966ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 197e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevoid MacroAssembler::Call(Label* target) { 198e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke bl(target); 199e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke} 200e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 201e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 202e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevoid MacroAssembler::Move(Register dst, Handle<Object> value) { 203e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke mov(dst, Operand(value)); 204e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke} 205d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 206d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 2076ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::Move(Register dst, Register src) { 2086ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (!dst.is(src)) { 2096ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(dst, src); 2106ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 2116ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 2126ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 2136ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::SmiJumpTable(Register index, Vector<Label*> targets) { 215a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Empty the const pool. 216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CheckConstPool(true, true); 217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(pc, pc, Operand(index, 218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LSL, 219a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block assembler::arm::Instr::kInstrSizeLog2 - kSmiTagSize)); 220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block BlockConstPoolBefore(pc_offset() + (targets.length() + 1) * kInstrSize); 221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block nop(); // Jump table alignment. 222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (int i = 0; i < targets.length(); i++) { 223a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(targets[i]); 224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 227a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 228a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::LoadRoot(Register destination, 229a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Heap::RootListIndex index, 230a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Condition cond) { 2313100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ldr(destination, MemOperand(roots, index << kPointerSizeLog2), cond); 232a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 233a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 234a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 23525f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsenvoid MacroAssembler::StoreRoot(Register source, 23625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen Heap::RootListIndex index, 23725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen Condition cond) { 23825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen str(source, MemOperand(roots, index << kPointerSizeLog2), cond); 23925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen} 24025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 24125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 2426ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::RecordWriteHelper(Register object, 2436ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register offset, 2446ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch) { 2456ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (FLAG_debug_code) { 2466ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Check that the object is not in new space. 2476ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label not_in_new_space; 2486ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InNewSpace(object, scratch, ne, ¬_in_new_space); 2496ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Abort("new-space object passed to RecordWriteHelper"); 2506ded16be15dd865a9b21ea304d5273c8be299c87Steve Block bind(¬_in_new_space); 2516ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 2524515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke 253a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // This is how much we shift the remembered set bit offset to get the 254a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset of the word in the remembered set. We divide by kBitsPerInt (32, 255a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // shift right 5) and then multiply by kIntSize (4, shift left 2). 256a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const int kRSetWordShift = 3; 257a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 2586ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label fast; 259a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 260a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Compute the bit offset in the remembered set. 261a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object: heap object pointer (with tag) 262a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset: offset to store location from the object 263a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(Page::kPageAlignmentMask)); // load mask only once 264a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block and_(scratch, object, Operand(ip)); // offset into page of the object 265a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(offset, scratch, Operand(offset)); // add offset into the object 266a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(offset, Operand(offset, LSR, kObjectAlignmentBits)); 267a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 268a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Compute the page address from the heap object pointer. 269a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object: heap object pointer (with tag) 270a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset: bit offset of store position in the remembered set 271a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bic(object, object, Operand(ip)); 272a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 273a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If the bit offset lies beyond the normal remembered set range, it is in 274a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the extra remembered set area of a large object. 275a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object: page start 276a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset: bit offset of store position in the remembered set 277a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(offset, Operand(Page::kPageSize / kPointerSize)); 278a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(lt, &fast); 279a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 280a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Adjust the bit offset to be relative to the start of the extra 281a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // remembered set and the start address to be the address of the extra 282a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // remembered set. 283a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block sub(offset, offset, Operand(Page::kPageSize / kPointerSize)); 284a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load the array length into 'scratch' and multiply by four to get the 285a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // size in bytes of the elements. 286a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, MemOperand(object, Page::kObjectStartOffset 287a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block + FixedArray::kLengthOffset)); 288a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch, Operand(scratch, LSL, kObjectAlignmentBits)); 289a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Add the page header (including remembered set), array header, and array 290a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // body size to the page address. 291a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(object, object, Operand(Page::kObjectStartOffset 292a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block + FixedArray::kHeaderSize)); 293a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(object, object, Operand(scratch)); 294a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 295a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&fast); 296a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Get address of the rset word. 297a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object: start of the remembered set (page start for the fast case) 298a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset: bit offset of store position in the remembered set 299a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bic(scratch, offset, Operand(kBitsPerInt - 1)); // clear the bit offset 300a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(object, object, Operand(scratch, LSR, kRSetWordShift)); 301a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Get bit offset in the rset word. 302a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object: address of remembered set word 303a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // offset: bit offset of store position 304a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block and_(offset, offset, Operand(kBitsPerInt - 1)); 305a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 306a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, MemOperand(object)); 307a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(1)); 308a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block orr(scratch, scratch, Operand(ip, LSL, offset)); 309a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(scratch, MemOperand(object)); 3106ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 3116ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3126ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3136ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::InNewSpace(Register object, 3146ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch, 3156ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Condition cc, 3166ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label* branch) { 3176ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(cc == eq || cc == ne); 3186ded16be15dd865a9b21ea304d5273c8be299c87Steve Block and_(scratch, object, Operand(ExternalReference::new_space_mask())); 3196ded16be15dd865a9b21ea304d5273c8be299c87Steve Block cmp(scratch, Operand(ExternalReference::new_space_start())); 3206ded16be15dd865a9b21ea304d5273c8be299c87Steve Block b(cc, branch); 3216ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 3226ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3236ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3246ded16be15dd865a9b21ea304d5273c8be299c87Steve Block// Will clobber 4 registers: object, offset, scratch, ip. The 3256ded16be15dd865a9b21ea304d5273c8be299c87Steve Block// register 'object' contains a heap object pointer. The heap object 3266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block// tag is shifted away. 3276ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::RecordWrite(Register object, Register offset, 3286ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch) { 3296ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // The compiled code assumes that record write doesn't change the 3306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // context register, so we check that none of the clobbered 3316ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // registers are cp. 3326ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(!object.is(cp) && !offset.is(cp) && !scratch.is(cp)); 3336ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3346ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label done; 3356ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3366ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // First, test that the object is not in the new space. We cannot set 3376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // remembered set bits in the new space. 3386ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InNewSpace(object, scratch, eq, &done); 3396ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 3406ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Record the actual write. 3416ded16be15dd865a9b21ea304d5273c8be299c87Steve Block RecordWriteHelper(object, offset, scratch); 342a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 343a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&done); 3444515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke 3454515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // Clobber all input registers when running with the debug-code flag 3464515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // turned on to provoke errors. 3474515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke if (FLAG_debug_code) { 3486ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(object, Operand(BitCast<int32_t>(kZapValue))); 3496ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(offset, Operand(BitCast<int32_t>(kZapValue))); 3506ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, Operand(BitCast<int32_t>(kZapValue))); 3514515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke } 352a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 353a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 354a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 355a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::EnterFrame(StackFrame::Type type) { 356a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r0-r3: preserved 357a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block stm(db_w, sp, cp.bit() | fp.bit() | lr.bit()); 358a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(Smi::FromInt(type))); 359a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(ip); 360a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(CodeObject())); 361a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(ip); 362a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(fp, sp, Operand(3 * kPointerSize)); // Adjust FP to point to saved FP. 363a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 364a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 365a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 366a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::LeaveFrame(StackFrame::Type type) { 367a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r0: preserved 368a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r1: preserved 369a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r2: preserved 370a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 371a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Drop the execution stack down to the frame pointer and restore 372a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the caller frame pointer and return address. 373a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(sp, fp); 374a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldm(ia_w, sp, fp.bit() | lr.bit()); 375a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 376a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 377a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 378d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid MacroAssembler::EnterExitFrame(ExitFrame::Mode mode) { 379a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Compute the argv pointer and keep it in a callee-saved register. 380a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r0 is argc. 381a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(r6, sp, Operand(r0, LSL, kPointerSizeLog2)); 382a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block sub(r6, r6, Operand(kPointerSize)); 383a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 384a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Compute callee's stack pointer before making changes and save it as 385a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ip register so that it is restored as sp register on exit, thereby 386a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // popping the args. 387a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 388a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // ip = sp + kPointerSize * #args; 389a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(ip, sp, Operand(r0, LSL, kPointerSizeLog2)); 390a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 3916ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Prepare the stack to be aligned when calling into C. After this point there 3926ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // are 5 pushes before the call into C, so the stack needs to be aligned after 3936ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // 5 pushes. 3946ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int frame_alignment = ActivationFrameAlignment(); 3956ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int frame_alignment_mask = frame_alignment - 1; 3966ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (frame_alignment != kPointerSize) { 3976ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // The following code needs to be more general if this assert does not hold. 3986ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(frame_alignment == 2 * kPointerSize); 3996ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // With 5 pushes left the frame must be unaligned at this point. 4006ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(r7, Operand(Smi::FromInt(0))); 4016ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(sp, Operand((frame_alignment - kPointerSize) & frame_alignment_mask)); 4026ded16be15dd865a9b21ea304d5273c8be299c87Steve Block push(r7, eq); // Push if aligned to make it unaligned. 4036ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 404a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 405a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Push in reverse order: caller_fp, sp_on_exit, and caller_pc. 406a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block stm(db_w, sp, fp.bit() | ip.bit() | lr.bit()); 407402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(fp, Operand(sp)); // Setup new frame pointer. 408a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 409402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(ip, Operand(CodeObject())); 410402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu push(ip); // Accessed from ExitFrame::code_slot. 411a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 412a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Save the frame pointer and the context in top. 413a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); 414a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(fp, MemOperand(ip)); 415a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Top::k_context_address))); 416a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(cp, MemOperand(ip)); 417a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 418a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Setup argc and the builtin function in callee-saved registers. 419a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r4, Operand(r0)); 420a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r5, Operand(r1)); 421a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 422a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 423a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef ENABLE_DEBUGGER_SUPPORT 424a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Save the state of all registers to the stack from the memory 425a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // location. This is needed to allow nested break points. 426d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block if (mode == ExitFrame::MODE_DEBUG) { 427a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Use sp as base to push. 428a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CopyRegistersFromMemoryToStack(sp, kJSCallerSaved); 429a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 430a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 431a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 432a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 433a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 4346ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::InitializeNewString(Register string, 4356ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register length, 4366ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Heap::RootListIndex map_index, 4376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch1, 4386ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch2) { 4396ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch1, Operand(length, LSL, kSmiTagSize)); 4406ded16be15dd865a9b21ea304d5273c8be299c87Steve Block LoadRoot(scratch2, map_index); 4416ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(scratch1, FieldMemOperand(string, String::kLengthOffset)); 4426ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch1, Operand(String::kEmptyHashField)); 4436ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(scratch2, FieldMemOperand(string, HeapObject::kMapOffset)); 4446ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(scratch1, FieldMemOperand(string, String::kHashFieldOffset)); 4456ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 4466ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 4476ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 4486ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockint MacroAssembler::ActivationFrameAlignment() { 449a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if defined(V8_HOST_ARCH_ARM) 450a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Running on the real platform. Use the alignment as mandated by the local 451a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // environment. 452a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Note: This will break if we ever start generating snapshots on one ARM 453a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // platform for another ARM platform with a different alignment. 4546ded16be15dd865a9b21ea304d5273c8be299c87Steve Block return OS::ActivationFrameAlignment(); 455a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#else // defined(V8_HOST_ARCH_ARM) 456a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If we are using the simulator then we should always align to the expected 457a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // alignment. As the simulator is used to generate snapshots we do not know 4586ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // if the target platform will need alignment, so this is controlled from a 4596ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // flag. 4606ded16be15dd865a9b21ea304d5273c8be299c87Steve Block return FLAG_sim_stack_alignment; 461a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // defined(V8_HOST_ARCH_ARM) 462a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 463a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 464a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 465d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid MacroAssembler::LeaveExitFrame(ExitFrame::Mode mode) { 466a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef ENABLE_DEBUGGER_SUPPORT 467a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Restore the memory copy of the registers by digging them out from 468a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the stack. This is needed to allow nested break points. 469d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block if (mode == ExitFrame::MODE_DEBUG) { 470a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // This code intentionally clobbers r2 and r3. 471a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; 472d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block const int kOffset = ExitFrameConstants::kCodeOffset - kCallerSavedSize; 473a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(r3, fp, Operand(kOffset)); 474a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CopyRegistersFromStackToMemory(r3, r2, kJSCallerSaved); 475a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 476a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 477a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 478a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Clear top frame. 479a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r3, Operand(0)); 480a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); 481a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(r3, MemOperand(ip)); 482a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 483a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Restore current context from top and clear it in debug mode. 484a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Top::k_context_address))); 485a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(cp, MemOperand(ip)); 486a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 487a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(r3, MemOperand(ip)); 488a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 489a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 490a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Pop the arguments, restore registers, and return. 491a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(sp, Operand(fp)); // respect ABI stack constraint 492a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldm(ia, sp, fp.bit() | sp.bit() | pc.bit()); 493a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 494a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 495a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 496a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::InvokePrologue(const ParameterCount& expected, 497a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& actual, 498a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Handle<Code> code_constant, 499a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register code_reg, 500a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* done, 501a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeFlag flag) { 502a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bool definitely_matches = false; 503a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label regular_invoke; 504a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 505a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check whether the expected and actual arguments count match. If not, 506a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // setup registers according to contract with ArgumentsAdaptorTrampoline: 507a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r0: actual arguments count 508a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r1: function (passed through to callee) 509a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r2: expected arguments count 510a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // r3: callee code entry 511a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 512a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The code below is made a lot easier because the calling code already sets 513a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // up actual and expected registers according to the contract if values are 514a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // passed in registers. 515a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(actual.is_immediate() || actual.reg().is(r0)); 516a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(expected.is_immediate() || expected.reg().is(r2)); 517a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((!code_constant.is_null() && code_reg.is(no_reg)) || code_reg.is(r3)); 518a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 519a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (expected.is_immediate()) { 520a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(actual.is_immediate()); 521a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (expected.immediate() == actual.immediate()) { 522a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block definitely_matches = true; 523a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 524a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r0, Operand(actual.immediate())); 525a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const int sentinel = SharedFunctionInfo::kDontAdaptArgumentsSentinel; 526a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (expected.immediate() == sentinel) { 527a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Don't worry about adapting arguments for builtins that 528a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // don't want that done. Skip adaption code by making it look 529a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // like we have a match between expected and actual number of 530a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // arguments. 531a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block definitely_matches = true; 532a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 533a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r2, Operand(expected.immediate())); 534a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 535a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 536a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 537a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (actual.is_immediate()) { 538a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(expected.reg(), Operand(actual.immediate())); 539a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(eq, ®ular_invoke); 540a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r0, Operand(actual.immediate())); 541a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 542a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(expected.reg(), Operand(actual.reg())); 543a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(eq, ®ular_invoke); 544a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 545a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 546a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 547a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (!definitely_matches) { 548a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (!code_constant.is_null()) { 549a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r3, Operand(code_constant)); 550a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(r3, r3, Operand(Code::kHeaderSize - kHeapObjectTag)); 551a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 552a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 553a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Handle<Code> adaptor = 554a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Handle<Code>(Builtins::builtin(Builtins::ArgumentsAdaptorTrampoline)); 555a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (flag == CALL_FUNCTION) { 556a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(adaptor, RelocInfo::CODE_TARGET); 557a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(done); 558a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 559a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(adaptor, RelocInfo::CODE_TARGET); 560a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 561a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(®ular_invoke); 562a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 563a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 564a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 565a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 566a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::InvokeCode(Register code, 567a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& expected, 568a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& actual, 569a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeFlag flag) { 570a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label done; 571a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 572a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokePrologue(expected, actual, Handle<Code>::null(), code, &done, flag); 573a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (flag == CALL_FUNCTION) { 574a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(code); 575a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 576a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(flag == JUMP_FUNCTION); 577a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(code); 578a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 579a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 580a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Continue here if InvokePrologue does handle the invocation due to 581a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // mismatched parameter counts. 582a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&done); 583a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 584a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 585a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 586a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::InvokeCode(Handle<Code> code, 587a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& expected, 588a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& actual, 589a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RelocInfo::Mode rmode, 590a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeFlag flag) { 591a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label done; 592a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 593a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokePrologue(expected, actual, code, no_reg, &done, flag); 594a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (flag == CALL_FUNCTION) { 595a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(code, rmode); 596a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 597a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(code, rmode); 598a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 599a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 600a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Continue here if InvokePrologue does handle the invocation due to 601a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // mismatched parameter counts. 602a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&done); 603a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 604a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 605a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 606a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::InvokeFunction(Register fun, 607a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block const ParameterCount& actual, 608a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeFlag flag) { 609a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Contract with called JS functions requires that function is passed in r1. 610a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(fun.is(r1)); 611a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 612a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register expected_reg = r2; 613a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register code_reg = r3; 614a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 615a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(code_reg, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); 616a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); 617a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(expected_reg, 618a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block FieldMemOperand(code_reg, 619a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block SharedFunctionInfo::kFormalParameterCountOffset)); 620a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(code_reg, 621a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block MemOperand(code_reg, SharedFunctionInfo::kCodeOffset - kHeapObjectTag)); 622a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(code_reg, code_reg, Operand(Code::kHeaderSize - kHeapObjectTag)); 623a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 624a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ParameterCount expected(expected_reg); 625a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeCode(code_reg, expected, actual, flag); 626a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 627a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 628a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 629402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescuvoid MacroAssembler::InvokeFunction(JSFunction* function, 630402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu const ParameterCount& actual, 631402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu InvokeFlag flag) { 632402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu ASSERT(function->is_compiled()); 633402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 634402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // Get the function and setup the context. 635402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(r1, Operand(Handle<JSFunction>(function))); 636402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset)); 637402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 638402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // Invoke the cached code. 639402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Handle<Code> code(function->code()); 640402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu ParameterCount expected(function->shared()->formal_parameter_count()); 641402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu InvokeCode(code, expected, actual, RelocInfo::CODE_TARGET, flag); 642402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu} 643402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 644a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef ENABLE_DEBUGGER_SUPPORT 645a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::SaveRegistersToMemory(RegList regs) { 646a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((regs & ~kJSCallerSaved) == 0); 647a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Copy the content of registers to memory location. 648a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (int i = 0; i < kNumJSCallerSaved; i++) { 649a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int r = JSCallerSavedCode(i); 650a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((regs & (1 << r)) != 0) { 651a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register reg = { r }; 652a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Debug_Address::Register(i)))); 653a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(reg, MemOperand(ip)); 654a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 655a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 656a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 657a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 658a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 659a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::RestoreRegistersFromMemory(RegList regs) { 660a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((regs & ~kJSCallerSaved) == 0); 661a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Copy the content of memory location to registers. 662a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (int i = kNumJSCallerSaved; --i >= 0;) { 663a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int r = JSCallerSavedCode(i); 664a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((regs & (1 << r)) != 0) { 665a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register reg = { r }; 666a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Debug_Address::Register(i)))); 667a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(reg, MemOperand(ip)); 668a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 669a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 670a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 671a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 672a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 673a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CopyRegistersFromMemoryToStack(Register base, 674a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RegList regs) { 675a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((regs & ~kJSCallerSaved) == 0); 676a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Copy the content of the memory location to the stack and adjust base. 677a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (int i = kNumJSCallerSaved; --i >= 0;) { 678a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int r = JSCallerSavedCode(i); 679a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((regs & (1 << r)) != 0) { 680a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Debug_Address::Register(i)))); 681a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(ip, MemOperand(ip)); 682a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(ip, MemOperand(base, 4, NegPreIndex)); 683a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 684a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 685a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 686a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 687a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 688a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CopyRegistersFromStackToMemory(Register base, 689a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch, 690a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RegList regs) { 691a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((regs & ~kJSCallerSaved) == 0); 692a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Copy the content of the stack to the memory location and adjust base. 693a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block for (int i = 0; i < kNumJSCallerSaved; i++) { 694a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int r = JSCallerSavedCode(i); 695a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((regs & (1 << r)) != 0) { 696a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(ExternalReference(Debug_Address::Register(i)))); 697a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, MemOperand(base, 4, PostIndex)); 698a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(scratch, MemOperand(ip)); 699a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 700a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 701a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 702402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 703402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 704402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescuvoid MacroAssembler::DebugBreak() { 705402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu ASSERT(allow_stub_calls()); 706402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(r0, Operand(0)); 707402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(r1, Operand(ExternalReference(Runtime::kDebugBreak))); 708402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu CEntryStub ces(1); 709402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Call(ces.GetCode(), RelocInfo::DEBUG_BREAK); 710402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu} 711a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 712a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 713a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 714a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::PushTryHandler(CodeLocation try_location, 715a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block HandlerType type) { 716a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Adjust this code if not the case. 717a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); 718a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The pc (return address) is passed in register lr. 719a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (try_location == IN_JAVASCRIPT) { 720a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (type == TRY_CATCH_HANDLER) { 721a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r3, Operand(StackHandler::TRY_CATCH)); 722a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 723a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r3, Operand(StackHandler::TRY_FINALLY)); 724a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 725a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize 726a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block && StackHandlerConstants::kFPOffset == 2 * kPointerSize 727a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block && StackHandlerConstants::kPCOffset == 3 * kPointerSize); 728a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block stm(db_w, sp, r3.bit() | fp.bit() | lr.bit()); 729a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Save the current handler as the next handler. 730a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r3, Operand(ExternalReference(Top::k_handler_address))); 731a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(r1, MemOperand(r3)); 732a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(StackHandlerConstants::kNextOffset == 0); 733a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(r1); 734a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Link this handler as the new current one. 735a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(sp, MemOperand(r3)); 736a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 737a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Must preserve r0-r4, r5-r7 are available. 738a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(try_location == IN_JS_ENTRY); 739a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The frame pointer does not point to a JS frame so we save NULL 740a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // for fp. We expect the code throwing an exception to check fp 741a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // before dereferencing it to restore the context. 742a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(ip, Operand(0)); // To save a NULL frame pointer. 743a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r6, Operand(StackHandler::ENTRY)); 744a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize 745a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block && StackHandlerConstants::kFPOffset == 2 * kPointerSize 746a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block && StackHandlerConstants::kPCOffset == 3 * kPointerSize); 747a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block stm(db_w, sp, r6.bit() | ip.bit() | lr.bit()); 748a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Save the current handler as the next handler. 749a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r7, Operand(ExternalReference(Top::k_handler_address))); 750a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(r6, MemOperand(r7)); 751a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(StackHandlerConstants::kNextOffset == 0); 752a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(r6); 753a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Link this handler as the new current one. 754a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(sp, MemOperand(r7)); 755a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 756a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 757a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 758a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 759e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarkevoid MacroAssembler::PopTryHandler() { 760e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke ASSERT_EQ(0, StackHandlerConstants::kNextOffset); 761e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke pop(r1); 762e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke mov(ip, Operand(ExternalReference(Top::k_handler_address))); 763e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke add(sp, sp, Operand(StackHandlerConstants::kSize - kPointerSize)); 764e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke str(r1, MemOperand(ip)); 765e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke} 766e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 767e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke 768a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockRegister MacroAssembler::CheckMaps(JSObject* object, Register object_reg, 769a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block JSObject* holder, Register holder_reg, 770a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch, 7716ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int save_at_depth, 772a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* miss) { 773a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Make sure there's no overlap between scratch and the other 774a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // registers. 775a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!scratch.is(object_reg) && !scratch.is(holder_reg)); 776a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 777a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Keep track of the current object in register reg. 778a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register reg = object_reg; 7796ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int depth = 0; 7806ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 7816ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (save_at_depth == depth) { 7826ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(reg, MemOperand(sp)); 7836ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 784a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 785a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check the maps in the prototype chain. 786a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Traverse the prototype chain from the object and do map checks. 787a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block while (object != holder) { 788a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block depth++; 789a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 790a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Only global objects and objects that do not require access 791a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // checks are allowed in stubs. 792a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); 793a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 794a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Get the map of the current object. 795a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); 796a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(scratch, Operand(Handle<Map>(object->map()))); 797a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 798a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Branch on the result of the map check. 799a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, miss); 800a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 801a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check access rights to the global object. This has to happen 802a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // after the map check so that we know that the object is 803a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // actually a global object. 804a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (object->IsJSGlobalProxy()) { 805a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CheckAccessGlobalProxy(reg, scratch, miss); 806a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Restore scratch register to be the map of the object. In the 807a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // new space case below, we load the prototype from the map in 808a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the scratch register. 809a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); 810a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 811a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 812a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block reg = holder_reg; // from now the object is in holder_reg 813a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block JSObject* prototype = JSObject::cast(object->GetPrototype()); 814a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (Heap::InNewSpace(prototype)) { 815a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The prototype is in new space; we cannot store a reference 816a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // to it in the code. Load it from the map. 817a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(reg, FieldMemOperand(scratch, Map::kPrototypeOffset)); 818a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 819a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The prototype is in old space; load it directly. 820a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(reg, Operand(Handle<JSObject>(prototype))); 821a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 822a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 8236ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (save_at_depth == depth) { 8246ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(reg, MemOperand(sp)); 8256ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 8266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 827a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Go to the next object in the prototype chain. 828a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block object = prototype; 829a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 830a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 831a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check the holder map. 832a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(reg, HeapObject::kMapOffset)); 833a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(scratch, Operand(Handle<Map>(object->map()))); 834a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, miss); 835a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 836a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Log the check depth. 8376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block LOG(IntEvent("check-maps-depth", depth + 1)); 838a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 839a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Perform security check for access to the global object and return 840a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // the holder register. 841a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(object == holder); 842a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(object->IsJSGlobalProxy() || !object->IsAccessCheckNeeded()); 843a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (object->IsJSGlobalProxy()) { 844a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CheckAccessGlobalProxy(reg, scratch, miss); 845a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 846a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return reg; 847a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 848a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 849a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 850a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CheckAccessGlobalProxy(Register holder_reg, 851a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch, 852a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* miss) { 853a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label same_contexts; 854a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 855a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!holder_reg.is(scratch)); 856a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!holder_reg.is(ip)); 857a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!scratch.is(ip)); 858a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 859a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load current lexical context from the stack frame. 860a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); 861a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // In debug mode, make sure the lexical context is set. 862a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 863a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(scratch, Operand(0)); 864a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(ne, "we should not have an empty lexical context"); 865a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 866a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 867a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load the global context of the current context. 868a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; 869a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(scratch, offset)); 870a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset)); 871a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 872a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check the context is a global context. 873a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_debug_code) { 874a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // TODO(119): avoid push(holder_reg)/pop(holder_reg) 875a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Cannot use ip as a temporary in this verification code. Due to the fact 876a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // that ip is clobbered as part of cmp with an object Operand. 877a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(holder_reg); // Temporarily save holder on the stack. 878a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Read the first word and compare to the global_context_map. 879a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(holder_reg, FieldMemOperand(scratch, HeapObject::kMapOffset)); 880a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LoadRoot(ip, Heap::kGlobalContextMapRootIndex); 881a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(holder_reg, ip); 882a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(eq, "JSGlobalObject::global_context should be a global context."); 883a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block pop(holder_reg); // Restore holder. 884a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 885a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 886a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check if both contexts are the same. 887a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); 888a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(scratch, Operand(ip)); 889a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(eq, &same_contexts); 890a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 891a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check the context is a global context. 892a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_debug_code) { 893a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // TODO(119): avoid push(holder_reg)/pop(holder_reg) 894a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Cannot use ip as a temporary in this verification code. Due to the fact 895a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // that ip is clobbered as part of cmp with an object Operand. 896a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(holder_reg); // Temporarily save holder on the stack. 897a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(holder_reg, ip); // Move ip to its holding place. 898a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LoadRoot(ip, Heap::kNullValueRootIndex); 899a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(holder_reg, ip); 900a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(ne, "JSGlobalProxy::context() should not be null."); 901a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 902a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(holder_reg, FieldMemOperand(holder_reg, HeapObject::kMapOffset)); 903a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LoadRoot(ip, Heap::kGlobalContextMapRootIndex); 904a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(holder_reg, ip); 905a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(eq, "JSGlobalObject::global_context should be a global context."); 906a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Restore ip is not needed. ip is reloaded below. 907a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block pop(holder_reg); // Restore holder. 908a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Restore ip to holder's context. 909a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(ip, FieldMemOperand(holder_reg, JSGlobalProxy::kContextOffset)); 910a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 911a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 912a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check that the security token in the calling global object is 913a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // compatible with the security token in the receiving global 914a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // object. 915a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block int token_offset = Context::kHeaderSize + 916a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Context::SECURITY_TOKEN_INDEX * kPointerSize; 917a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 918a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, FieldMemOperand(scratch, token_offset)); 919a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(ip, FieldMemOperand(ip, token_offset)); 920a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(scratch, Operand(ip)); 921a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, miss); 922a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 923a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&same_contexts); 924a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 925a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 926a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 927a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::AllocateInNewSpace(int object_size, 928a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register result, 929a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch1, 930a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch2, 931a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* gc_required, 932a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block AllocationFlags flags) { 933a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!result.is(scratch1)); 934a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!scratch1.is(scratch2)); 935a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 93625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen // Make object size into bytes. 93725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen if ((flags & SIZE_IN_WORDS) != 0) { 93825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen object_size *= kPointerSize; 93925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } 94025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen ASSERT_EQ(0, object_size & kObjectAlignmentMask); 94125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen 942a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load address of new object into result and allocation top address into 943a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // scratch1. 944a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference new_space_allocation_top = 945a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference::new_space_allocation_top_address(); 946a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch1, Operand(new_space_allocation_top)); 947a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((flags & RESULT_CONTAINS_TOP) == 0) { 948a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(result, MemOperand(scratch1)); 949d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } else if (FLAG_debug_code) { 950a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Assert that result actually contains top on entry. scratch2 is used 951a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // immediately below so this use of scratch2 does not cause difference with 952a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // respect to register content between debug and release mode. 953a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch2, MemOperand(scratch1)); 954a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(result, scratch2); 955a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(eq, "Unexpected allocation top"); 956a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 957a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 958a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Calculate new top and bail out if new space is exhausted. Use result 959a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // to calculate the new top. 960a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference new_space_allocation_limit = 961a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference::new_space_allocation_limit_address(); 962a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch2, Operand(new_space_allocation_limit)); 963a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch2, MemOperand(scratch2)); 96425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen add(result, result, Operand(object_size)); 965a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(result, Operand(scratch2)); 966a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(hi, gc_required); 967a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(result, MemOperand(scratch1)); 968a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 969a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Tag and adjust back to start of new object. 970a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((flags & TAG_OBJECT) != 0) { 97125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen sub(result, result, Operand(object_size - kHeapObjectTag)); 972a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 97325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen sub(result, result, Operand(object_size)); 974a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 975a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 976a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 977a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 978a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::AllocateInNewSpace(Register object_size, 979a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register result, 980a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch1, 981a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch2, 982a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* gc_required, 983a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block AllocationFlags flags) { 984a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!result.is(scratch1)); 985a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(!scratch1.is(scratch2)); 986a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 987a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Load address of new object into result and allocation top address into 988a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // scratch1. 989a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference new_space_allocation_top = 990a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference::new_space_allocation_top_address(); 991a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch1, Operand(new_space_allocation_top)); 992a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((flags & RESULT_CONTAINS_TOP) == 0) { 993a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(result, MemOperand(scratch1)); 994d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } else if (FLAG_debug_code) { 995a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Assert that result actually contains top on entry. scratch2 is used 996a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // immediately below so this use of scratch2 does not cause difference with 997a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // respect to register content between debug and release mode. 998a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch2, MemOperand(scratch1)); 999a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(result, scratch2); 1000a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(eq, "Unexpected allocation top"); 1001a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1002a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1003a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Calculate new top and bail out if new space is exhausted. Use result 1004a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // to calculate the new top. Object size is in words so a shift is required to 1005a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // get the number of bytes 1006a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference new_space_allocation_limit = 1007a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference::new_space_allocation_limit_address(); 1008a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch2, Operand(new_space_allocation_limit)); 1009a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch2, MemOperand(scratch2)); 101025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen if ((flags & SIZE_IN_WORDS) != 0) { 101125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen add(result, result, Operand(object_size, LSL, kPointerSizeLog2)); 101225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } else { 101325f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen add(result, result, Operand(object_size)); 101425f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } 1015a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(result, Operand(scratch2)); 1016a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(hi, gc_required); 1017a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1018d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // Update allocation top. result temporarily holds the new top. 1019d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block if (FLAG_debug_code) { 1020d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block tst(result, Operand(kObjectAlignmentMask)); 1021d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Check(eq, "Unaligned allocation in new space"); 1022d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1023a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(result, MemOperand(scratch1)); 1024a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1025a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Adjust back to start of new object. 102625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen if ((flags & SIZE_IN_WORDS) != 0) { 102725f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen sub(result, result, Operand(object_size, LSL, kPointerSizeLog2)); 102825f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } else { 102925f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen sub(result, result, Operand(object_size)); 103025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen } 1031a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1032a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Tag object if requested. 1033a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if ((flags & TAG_OBJECT) != 0) { 1034a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(result, result, Operand(kHeapObjectTag)); 1035a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1036a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1037a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1038a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1039a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::UndoAllocationInNewSpace(Register object, 1040a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch) { 1041a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference new_space_allocation_top = 1042a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ExternalReference::new_space_allocation_top_address(); 1043a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1044a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Make sure the object has no tag before resetting top. 1045a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block and_(object, object, Operand(~kHeapObjectTagMask)); 1046a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 1047a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check that the object un-allocated is below the current top. 1048a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch, Operand(new_space_allocation_top)); 1049a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch, MemOperand(scratch)); 1050a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(object, scratch); 1051a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(lt, "Undo allocation of non allocated memory"); 1052a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1053a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Write the address of the object to un-allocate as the current top. 1054a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch, Operand(new_space_allocation_top)); 1055a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(object, MemOperand(scratch)); 1056a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1057a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1058a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 10593100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::AllocateTwoByteString(Register result, 10603100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register length, 10613100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch1, 10623100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch2, 10633100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch3, 10643100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* gc_required) { 10653100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Calculate the number of bytes needed for the characters in the string while 10663100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // observing object alignment. 10673100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT((SeqTwoByteString::kHeaderSize & kObjectAlignmentMask) == 0); 10683100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu mov(scratch1, Operand(length, LSL, 1)); // Length in bytes, not chars. 10693100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu add(scratch1, scratch1, 10703100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Operand(kObjectAlignmentMask + SeqTwoByteString::kHeaderSize)); 107125f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); 10723100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 10733100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Allocate two-byte string in new space. 10743100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu AllocateInNewSpace(scratch1, 10753100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu result, 10763100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch2, 10773100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch3, 10783100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu gc_required, 10793100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu TAG_OBJECT); 10803100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 10813100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Set the map, length and hash field. 10826ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InitializeNewString(result, 10836ded16be15dd865a9b21ea304d5273c8be299c87Steve Block length, 10846ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Heap::kStringMapRootIndex, 10856ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 10866ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2); 10873100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 10883100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 10893100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 10903100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::AllocateAsciiString(Register result, 10913100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register length, 10923100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch1, 10933100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch2, 10943100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch3, 10953100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* gc_required) { 10963100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Calculate the number of bytes needed for the characters in the string while 10973100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // observing object alignment. 10983100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT((SeqAsciiString::kHeaderSize & kObjectAlignmentMask) == 0); 10993100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT(kCharSize == 1); 11003100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu add(scratch1, length, 11013100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Operand(kObjectAlignmentMask + SeqAsciiString::kHeaderSize)); 110225f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen and_(scratch1, scratch1, Operand(~kObjectAlignmentMask)); 11033100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11043100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Allocate ASCII string in new space. 11053100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu AllocateInNewSpace(scratch1, 11063100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu result, 11073100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch2, 11083100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch3, 11093100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu gc_required, 11103100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu TAG_OBJECT); 11113100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11123100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu // Set the map, length and hash field. 11136ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InitializeNewString(result, 11146ded16be15dd865a9b21ea304d5273c8be299c87Steve Block length, 11156ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Heap::kAsciiStringMapRootIndex, 11166ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 11176ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2); 11183100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 11193100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11203100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11213100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::AllocateTwoByteConsString(Register result, 11223100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register length, 11233100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch1, 11243100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch2, 11253100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* gc_required) { 112625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen AllocateInNewSpace(ConsString::kSize, 11273100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu result, 11283100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch1, 11293100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch2, 11303100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu gc_required, 11313100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu TAG_OBJECT); 11326ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 11336ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InitializeNewString(result, 11346ded16be15dd865a9b21ea304d5273c8be299c87Steve Block length, 11356ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Heap::kConsStringMapRootIndex, 11366ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 11376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2); 11383100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 11393100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11403100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11413100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::AllocateAsciiConsString(Register result, 11423100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register length, 11433100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch1, 11443100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch2, 11453100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* gc_required) { 114625f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen AllocateInNewSpace(ConsString::kSize, 11473100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu result, 11483100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch1, 11493100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu scratch2, 11503100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu gc_required, 11513100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu TAG_OBJECT); 11526ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 11536ded16be15dd865a9b21ea304d5273c8be299c87Steve Block InitializeNewString(result, 11546ded16be15dd865a9b21ea304d5273c8be299c87Steve Block length, 11556ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Heap::kConsAsciiStringMapRootIndex, 11566ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 11576ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2); 11583100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 11593100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11603100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11616ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::CompareObjectType(Register object, 1162a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register map, 1163a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register type_reg, 1164a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InstanceType type) { 11656ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(map, FieldMemOperand(object, HeapObject::kMapOffset)); 1166a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CompareInstanceType(map, type_reg, type); 1167a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1168a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1169a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1170a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CompareInstanceType(Register map, 1171a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register type_reg, 1172a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InstanceType type) { 1173a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldrb(type_reg, FieldMemOperand(map, Map::kInstanceTypeOffset)); 1174a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(type_reg, Operand(type)); 1175a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1176a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1177a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 11783100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::CheckMap(Register obj, 11793100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register scratch, 11803100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Handle<Map> map, 11813100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* fail, 11823100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu bool is_heap_object) { 11833100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu if (!is_heap_object) { 11843100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu BranchOnSmi(obj, fail); 11853100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu } 11863100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ldr(scratch, FieldMemOperand(obj, HeapObject::kMapOffset)); 11873100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu mov(ip, Operand(map)); 11883100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu cmp(scratch, ip); 11893100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu b(ne, fail); 11903100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 11913100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 11923100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 1193a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::TryGetFunctionPrototype(Register function, 1194a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register result, 1195a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch, 1196a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label* miss) { 1197a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check that the receiver isn't a smi. 1198a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block BranchOnSmi(function, miss); 1199a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1200a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check that the function really is a function. Load map into result reg. 1201a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CompareObjectType(function, result, scratch, JS_FUNCTION_TYPE); 1202a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, miss); 1203a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1204a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Make sure that the function has an instance prototype. 1205a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label non_instance; 1206a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldrb(scratch, FieldMemOperand(result, Map::kBitFieldOffset)); 1207a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block tst(scratch, Operand(1 << Map::kHasNonInstancePrototype)); 1208a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, &non_instance); 1209a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1210a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Get the prototype or initial map from the function. 1211a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(result, 1212a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block FieldMemOperand(function, JSFunction::kPrototypeOrInitialMapOffset)); 1213a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1214a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If the prototype or initial map is the hole, don't return it and 1215a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // simply miss the cache instead. This will allow us to allocate a 1216a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // prototype object on-demand in the runtime system. 1217a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LoadRoot(ip, Heap::kTheHoleValueRootIndex); 1218a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block cmp(result, ip); 1219a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(eq, miss); 1220a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1221a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If the function does not have an initial map, we're done. 1222a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label done; 1223a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CompareObjectType(result, scratch, scratch, MAP_TYPE); 1224a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(ne, &done); 1225a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1226a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Get the prototype from the initial map. 1227a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(result, FieldMemOperand(result, Map::kPrototypeOffset)); 1228a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block jmp(&done); 1229a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1230a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Non-instance prototype: Fetch prototype from constructor field 1231a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // in initial map. 1232a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&non_instance); 1233a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(result, FieldMemOperand(result, Map::kConstructorOffset)); 1234a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1235a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // All done. 1236a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&done); 1237a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1238a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1239a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1240a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CallStub(CodeStub* stub, Condition cond) { 1241a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(allow_stub_calls()); // stub calls are not allowed in some stubs 1242a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Call(stub->GetCode(), RelocInfo::CODE_TARGET, cond); 1243a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1244a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1245a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 12463100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::TailCallStub(CodeStub* stub, Condition cond) { 12473100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT(allow_stub_calls()); // stub calls are not allowed in some stubs 12483100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Jump(stub->GetCode(), RelocInfo::CODE_TARGET, cond); 12493100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 12503100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 12513100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 1252a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::StubReturn(int argc) { 1253a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(argc >= 1 && generating_stub()); 12543100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu if (argc > 1) { 1255a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(sp, sp, Operand((argc - 1) * kPointerSize)); 12563100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu } 1257a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Ret(); 1258a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1259a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1260a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1261a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::IllegalOperation(int num_arguments) { 1262a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (num_arguments > 0) { 1263a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(sp, sp, Operand(num_arguments * kPointerSize)); 1264a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1265a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block LoadRoot(r0, Heap::kUndefinedValueRootIndex); 1266a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1267a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1268a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1269d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid MacroAssembler::IntegerToDoubleConversionWithVFP3(Register inReg, 1270d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Register outHighReg, 1271d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block Register outLowReg) { 1272d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // ARMv7 VFP3 instructions to implement integer to double conversion. 1273d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block mov(r7, Operand(inReg, ASR, kSmiTagSize)); 1274e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke vmov(s15, r7); 12756ded16be15dd865a9b21ea304d5273c8be299c87Steve Block vcvt_f64_s32(d7, s15); 1276e46be819fca9468a0cd4e74859ce0f778eb8ca60Leon Clarke vmov(outLowReg, outHighReg, d7); 1277d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block} 1278d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 1279d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 12803100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::GetLeastBitsFromSmi(Register dst, 12813100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register src, 12823100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu int num_least_bits) { 12833100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu if (CpuFeatures::IsSupported(ARMv7)) { 12843100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ubfx(dst, src, Operand(kSmiTagSize), Operand(num_least_bits - 1)); 12853100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu } else { 12863100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu mov(dst, Operand(src, ASR, kSmiTagSize)); 12873100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu and_(dst, dst, Operand((1 << num_least_bits) - 1)); 12883100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu } 12893100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 12903100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 12913100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 1292a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CallRuntime(Runtime::Function* f, int num_arguments) { 1293a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // All parameters are on the stack. r0 has the return value after call. 1294a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1295a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // If the expected number of arguments of the runtime function is 1296a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // constant, we check that the actual number of arguments match the 1297a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // expectation. 1298a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (f->nargs >= 0 && f->nargs != num_arguments) { 1299a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block IllegalOperation(num_arguments); 1300a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block return; 1301a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1302a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 13034515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // TODO(1236192): Most runtime routines don't need the number of 13044515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // arguments passed in because it is constant. At some point we 13054515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // should remove this need and make the runtime routine entry code 13064515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke // smarter. 13074515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke mov(r0, Operand(num_arguments)); 13084515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke mov(r1, Operand(ExternalReference(f))); 13094515c472dc3e5ed2448a564600976759e569a0a8Leon Clarke CEntryStub stub(1); 1310a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CallStub(&stub); 1311a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1312a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1313a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1314a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::CallRuntime(Runtime::FunctionId fid, int num_arguments) { 1315a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CallRuntime(Runtime::FunctionForId(fid), num_arguments); 1316a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1317a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1318a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1319402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescuvoid MacroAssembler::CallExternalReference(const ExternalReference& ext, 1320402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu int num_arguments) { 1321402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(r0, Operand(num_arguments)); 1322402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu mov(r1, Operand(ext)); 1323402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 1324402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu CEntryStub stub(1); 1325402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu CallStub(&stub); 1326402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu} 1327402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 1328402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu 13296ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::TailCallExternalReference(const ExternalReference& ext, 13306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int num_arguments, 13316ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int result_size) { 1332a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // TODO(1236192): Most runtime routines don't need the number of 1333a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // arguments passed in because it is constant. At some point we 1334a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // should remove this need and make the runtime routine entry code 1335a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // smarter. 1336a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r0, Operand(num_arguments)); 13376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block JumpToExternalReference(ext); 1338a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1339a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1340a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 13416ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::TailCallRuntime(Runtime::FunctionId fid, 13426ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int num_arguments, 13436ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int result_size) { 13446ded16be15dd865a9b21ea304d5273c8be299c87Steve Block TailCallExternalReference(ExternalReference(fid), num_arguments, result_size); 13456ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 13466ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 13476ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 13486ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::JumpToExternalReference(const ExternalReference& builtin) { 1349a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#if defined(__thumb__) 1350a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Thumb mode builtin. 1351a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT((reinterpret_cast<intptr_t>(builtin.address()) & 1) == 1); 1352a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1353a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r1, Operand(builtin)); 1354a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CEntryStub stub(1); 1355a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Jump(stub.GetCode(), RelocInfo::CODE_TARGET); 1356a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1357a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1358a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1359a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::InvokeBuiltin(Builtins::JavaScript id, 1360a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block InvokeJSFlags flags) { 1361402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu GetBuiltinEntry(r2, id); 1362a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (flags == CALL_JS) { 1363402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Call(r2); 1364a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } else { 1365a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(flags == JUMP_JS); 1366402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu Jump(r2); 1367a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1368a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1369a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1370a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1371a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::GetBuiltinEntry(Register target, Builtins::JavaScript id) { 13726ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(!target.is(r1)); 13736ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 13746ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Load the builtins object into target register. 13756ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(target, MemOperand(cp, Context::SlotOffset(Context::GLOBAL_INDEX))); 13766ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(target, FieldMemOperand(target, GlobalObject::kBuiltinsOffset)); 13776ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1378402d937239b0e2fd11bf2f4fe972ad78aa9fd481Andrei Popescu // Load the JavaScript builtin function from the builtins object. 13796ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(r1, FieldMemOperand(target, 13806ded16be15dd865a9b21ea304d5273c8be299c87Steve Block JSBuiltinsObject::OffsetOfFunctionWithId(id))); 13816ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 13826ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Load the code entry point from the builtins object. 13836ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(target, FieldMemOperand(target, 13846ded16be15dd865a9b21ea304d5273c8be299c87Steve Block JSBuiltinsObject::OffsetOfCodeWithId(id))); 13856ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (FLAG_debug_code) { 13866ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Make sure the code objects in the builtins object and in the 13876ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // builtin function are the same. 13886ded16be15dd865a9b21ea304d5273c8be299c87Steve Block push(r1); 13896ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(r1, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset)); 13906ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(r1, FieldMemOperand(r1, SharedFunctionInfo::kCodeOffset)); 13916ded16be15dd865a9b21ea304d5273c8be299c87Steve Block cmp(r1, target); 13926ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Assert(eq, "Builtin code object changed"); 13936ded16be15dd865a9b21ea304d5273c8be299c87Steve Block pop(r1); 13946ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 1395a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(target, target, Operand(Code::kHeaderSize - kHeapObjectTag)); 1396a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1397a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1398a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1399a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::SetCounter(StatsCounter* counter, int value, 1400a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch1, Register scratch2) { 1401a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_native_code_counters && counter->Enabled()) { 1402a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch1, Operand(value)); 1403a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch2, Operand(ExternalReference(counter))); 1404a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(scratch1, MemOperand(scratch2)); 1405a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1406a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1407a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1408a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1409a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::IncrementCounter(StatsCounter* counter, int value, 1410a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch1, Register scratch2) { 1411a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(value > 0); 1412a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_native_code_counters && counter->Enabled()) { 1413a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch2, Operand(ExternalReference(counter))); 1414a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch1, MemOperand(scratch2)); 1415a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block add(scratch1, scratch1, Operand(value)); 1416a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(scratch1, MemOperand(scratch2)); 1417a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1418a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1419a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1420a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1421a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::DecrementCounter(StatsCounter* counter, int value, 1422a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Register scratch1, Register scratch2) { 1423a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(value > 0); 1424a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_native_code_counters && counter->Enabled()) { 1425a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(scratch2, Operand(ExternalReference(counter))); 1426a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ldr(scratch1, MemOperand(scratch2)); 1427a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block sub(scratch1, scratch1, Operand(value)); 1428a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block str(scratch1, MemOperand(scratch2)); 1429a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1430a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1431a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1432a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1433a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Assert(Condition cc, const char* msg) { 1434a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (FLAG_debug_code) 1435a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Check(cc, msg); 1436a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1437a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1438a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1439a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Check(Condition cc, const char* msg) { 1440a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Label L; 1441a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block b(cc, &L); 1442a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block Abort(msg); 1443a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // will not return here 1444a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block bind(&L); 1445a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1446a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1447a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1448a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid MacroAssembler::Abort(const char* msg) { 1449a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // We want to pass the msg string like a smi to avoid GC 1450a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // problems, however msg is not guaranteed to be aligned 1451a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // properly. Instead, we pass an aligned pointer that is 1452a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // a proper v8 smi, but also pass the alignment difference 1453a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // from the real pointer as a smi. 1454a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block intptr_t p1 = reinterpret_cast<intptr_t>(msg); 1455a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block intptr_t p0 = (p1 & ~kSmiTagMask) + kSmiTag; 1456a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(reinterpret_cast<Object*>(p0)->IsSmi()); 1457a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef DEBUG 1458a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block if (msg != NULL) { 1459a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RecordComment("Abort message: "); 1460a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block RecordComment(msg); 1461a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block } 1462a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif 1463d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // Disable stub call restrictions to always allow calls to abort. 1464d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block set_allow_stub_calls(true); 1465d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 1466a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r0, Operand(p0)); 1467a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(r0); 1468a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block mov(r0, Operand(Smi::FromInt(p1 - p0))); 1469a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block push(r0); 1470a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CallRuntime(Runtime::kAbort, 2); 1471a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // will not return here 1472a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1473a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1474a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1475d0582a6c46733687d045e4188a1bcd0123c758a1Steve Blockvoid MacroAssembler::LoadContext(Register dst, int context_chain_length) { 1476d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block if (context_chain_length > 0) { 1477d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // Move up the chain of contexts to the context containing the slot. 1478d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, MemOperand(cp, Context::SlotOffset(Context::CLOSURE_INDEX))); 1479d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // Load the function context (which is the incoming, outer context). 1480d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, FieldMemOperand(dst, JSFunction::kContextOffset)); 1481d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block for (int i = 1; i < context_chain_length; i++) { 1482d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, MemOperand(dst, Context::SlotOffset(Context::CLOSURE_INDEX))); 1483d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, FieldMemOperand(dst, JSFunction::kContextOffset)); 1484d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1485d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // The context may be an intermediate context, not a function context. 1486d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, MemOperand(dst, Context::SlotOffset(Context::FCONTEXT_INDEX))); 1487d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } else { // Slot is in the current function context. 1488d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block // The context may be an intermediate context, not a function context. 1489d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block ldr(dst, MemOperand(cp, Context::SlotOffset(Context::FCONTEXT_INDEX))); 1490d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block } 1491d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block} 1492d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 1493d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 14943100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::JumpIfNotBothSmi(Register reg1, 14953100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register reg2, 14963100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* on_not_both_smi) { 14973100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT_EQ(0, kSmiTag); 14983100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu tst(reg1, Operand(kSmiTagMask)); 14993100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu tst(reg2, Operand(kSmiTagMask), eq); 15003100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu b(ne, on_not_both_smi); 15013100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 15023100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 15033100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 15043100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescuvoid MacroAssembler::JumpIfEitherSmi(Register reg1, 15053100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Register reg2, 15063100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu Label* on_either_smi) { 15073100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu ASSERT_EQ(0, kSmiTag); 15083100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu tst(reg1, Operand(kSmiTagMask)); 15093100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu tst(reg2, Operand(kSmiTagMask), ne); 15103100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu b(eq, on_either_smi); 15113100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu} 15123100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 15133100271588b61cbc1dc472a3f2f105d2eed8497fAndrei Popescu 1514d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarkevoid MacroAssembler::JumpIfNonSmisNotBothSequentialAsciiStrings( 1515d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register first, 1516d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register second, 1517d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register scratch1, 1518d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register scratch2, 1519d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Label* failure) { 1520d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke // Test that both first and second are sequential ASCII strings. 1521d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke // Assume that they are non-smis. 1522d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke ldr(scratch1, FieldMemOperand(first, HeapObject::kMapOffset)); 1523d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke ldr(scratch2, FieldMemOperand(second, HeapObject::kMapOffset)); 1524d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke ldrb(scratch1, FieldMemOperand(scratch1, Map::kInstanceTypeOffset)); 1525d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke ldrb(scratch2, FieldMemOperand(scratch2, Map::kInstanceTypeOffset)); 15266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 15276ded16be15dd865a9b21ea304d5273c8be299c87Steve Block JumpIfBothInstanceTypesAreNotSequentialAscii(scratch1, 15286ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2, 15296ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 15306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2, 15316ded16be15dd865a9b21ea304d5273c8be299c87Steve Block failure); 1532d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke} 1533d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke 1534d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarkevoid MacroAssembler::JumpIfNotBothSequentialAsciiStrings(Register first, 1535d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register second, 1536d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register scratch1, 1537d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Register scratch2, 1538d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke Label* failure) { 1539d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke // Check that neither is a smi. 1540d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke ASSERT_EQ(0, kSmiTag); 1541d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke and_(scratch1, first, Operand(second)); 1542d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke tst(scratch1, Operand(kSmiTagMask)); 1543d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke b(eq, failure); 1544d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke JumpIfNonSmisNotBothSequentialAsciiStrings(first, 1545d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke second, 1546d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke scratch1, 1547d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke scratch2, 1548d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke failure); 1549d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke} 1550d91b9f7d46489a9ee00f9cb415630299c76a502bLeon Clarke 1551d0582a6c46733687d045e4188a1bcd0123c758a1Steve Block 15526ded16be15dd865a9b21ea304d5273c8be299c87Steve Block// Allocates a heap number or jumps to the need_gc label if the young space 15536ded16be15dd865a9b21ea304d5273c8be299c87Steve Block// is full and a scavenge is needed. 15546ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::AllocateHeapNumber(Register result, 15556ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch1, 15566ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch2, 15576ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label* gc_required) { 15586ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Allocate an object in the heap for the heap number and tag it as a heap 15596ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // object. 156025f6136652d8341ed047e7fc1a450af5bd218ea9Kristian Monsen AllocateInNewSpace(HeapNumber::kSize, 15616ded16be15dd865a9b21ea304d5273c8be299c87Steve Block result, 15626ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch1, 15636ded16be15dd865a9b21ea304d5273c8be299c87Steve Block scratch2, 15646ded16be15dd865a9b21ea304d5273c8be299c87Steve Block gc_required, 15656ded16be15dd865a9b21ea304d5273c8be299c87Steve Block TAG_OBJECT); 15666ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 15676ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Get heap number map and store it in the allocated object. 15686ded16be15dd865a9b21ea304d5273c8be299c87Steve Block LoadRoot(scratch1, Heap::kHeapNumberMapRootIndex); 15696ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset)); 15706ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 15716ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 15726ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 15736ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::CountLeadingZeros(Register source, 15746ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch, 15756ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register zeros) { 15766ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#ifdef CAN_USE_ARMV5_INSTRUCTIONS 15776ded16be15dd865a9b21ea304d5273c8be299c87Steve Block clz(zeros, source); // This instruction is only supported after ARM5. 15786ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#else 15796ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(zeros, Operand(0)); 15806ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, source); 15816ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Top 16. 15826ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(scratch, Operand(0xffff0000)); 15836ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(zeros, zeros, Operand(16), LeaveCC, eq); 15846ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, Operand(scratch, LSL, 16), LeaveCC, eq); 15856ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Top 8. 15866ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(scratch, Operand(0xff000000)); 15876ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(zeros, zeros, Operand(8), LeaveCC, eq); 15886ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, Operand(scratch, LSL, 8), LeaveCC, eq); 15896ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Top 4. 15906ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(scratch, Operand(0xf0000000)); 15916ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(zeros, zeros, Operand(4), LeaveCC, eq); 15926ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, Operand(scratch, LSL, 4), LeaveCC, eq); 15936ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Top 2. 15946ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(scratch, Operand(0xc0000000)); 15956ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(zeros, zeros, Operand(2), LeaveCC, eq); 15966ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, Operand(scratch, LSL, 2), LeaveCC, eq); 15976ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Top bit. 15986ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(scratch, Operand(0x80000000u)); 15996ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(zeros, zeros, Operand(1), LeaveCC, eq); 16006ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#endif 16016ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16026ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16036ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16046ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::JumpIfBothInstanceTypesAreNotSequentialAscii( 16056ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register first, 16066ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register second, 16076ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch1, 16086ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch2, 16096ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label* failure) { 16106ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int kFlatAsciiStringMask = 16116ded16be15dd865a9b21ea304d5273c8be299c87Steve Block kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; 16126ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int kFlatAsciiStringTag = ASCII_STRING_TYPE; 16136ded16be15dd865a9b21ea304d5273c8be299c87Steve Block and_(scratch1, first, Operand(kFlatAsciiStringMask)); 16146ded16be15dd865a9b21ea304d5273c8be299c87Steve Block and_(scratch2, second, Operand(kFlatAsciiStringMask)); 16156ded16be15dd865a9b21ea304d5273c8be299c87Steve Block cmp(scratch1, Operand(kFlatAsciiStringTag)); 16166ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Ignore second test if first test failed. 16176ded16be15dd865a9b21ea304d5273c8be299c87Steve Block cmp(scratch2, Operand(kFlatAsciiStringTag), eq); 16186ded16be15dd865a9b21ea304d5273c8be299c87Steve Block b(ne, failure); 16196ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16206ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16216ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16226ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::JumpIfInstanceTypeIsNotSequentialAscii(Register type, 16236ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Register scratch, 16246ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label* failure) { 16256ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int kFlatAsciiStringMask = 16266ded16be15dd865a9b21ea304d5273c8be299c87Steve Block kIsNotStringMask | kStringEncodingMask | kStringRepresentationMask; 16276ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int kFlatAsciiStringTag = ASCII_STRING_TYPE; 16286ded16be15dd865a9b21ea304d5273c8be299c87Steve Block and_(scratch, type, Operand(kFlatAsciiStringMask)); 16296ded16be15dd865a9b21ea304d5273c8be299c87Steve Block cmp(scratch, Operand(kFlatAsciiStringTag)); 16306ded16be15dd865a9b21ea304d5273c8be299c87Steve Block b(ne, failure); 16316ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16326ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16336ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16346ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::PrepareCallCFunction(int num_arguments, Register scratch) { 16356ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int frame_alignment = ActivationFrameAlignment(); 16366ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Up to four simple arguments are passed in registers r0..r3. 16376ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int stack_passed_arguments = (num_arguments <= 4) ? 0 : num_arguments - 4; 16386ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (frame_alignment > kPointerSize) { 16396ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Make stack end at alignment and make room for num_arguments - 4 words 16406ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // and the original value of sp. 16416ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(scratch, sp); 16426ded16be15dd865a9b21ea304d5273c8be299c87Steve Block sub(sp, sp, Operand((stack_passed_arguments + 1) * kPointerSize)); 16436ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(IsPowerOf2(frame_alignment)); 16446ded16be15dd865a9b21ea304d5273c8be299c87Steve Block and_(sp, sp, Operand(-frame_alignment)); 16456ded16be15dd865a9b21ea304d5273c8be299c87Steve Block str(scratch, MemOperand(sp, stack_passed_arguments * kPointerSize)); 16466ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } else { 16476ded16be15dd865a9b21ea304d5273c8be299c87Steve Block sub(sp, sp, Operand(stack_passed_arguments * kPointerSize)); 16486ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 16496ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16506ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16516ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16526ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::CallCFunction(ExternalReference function, 16536ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int num_arguments) { 16546ded16be15dd865a9b21ea304d5273c8be299c87Steve Block mov(ip, Operand(function)); 16556ded16be15dd865a9b21ea304d5273c8be299c87Steve Block CallCFunction(ip, num_arguments); 16566ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16576ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16586ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16596ded16be15dd865a9b21ea304d5273c8be299c87Steve Blockvoid MacroAssembler::CallCFunction(Register function, int num_arguments) { 16606ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Make sure that the stack is aligned before calling a C function unless 16616ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // running in the simulator. The simulator has its own alignment check which 16626ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // provides more information. 16636ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#if defined(V8_HOST_ARCH_ARM) 16646ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (FLAG_debug_code) { 16656ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int frame_alignment = OS::ActivationFrameAlignment(); 16666ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int frame_alignment_mask = frame_alignment - 1; 16676ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (frame_alignment > kPointerSize) { 16686ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ASSERT(IsPowerOf2(frame_alignment)); 16696ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Label alignment_as_expected; 16706ded16be15dd865a9b21ea304d5273c8be299c87Steve Block tst(sp, Operand(frame_alignment_mask)); 16716ded16be15dd865a9b21ea304d5273c8be299c87Steve Block b(eq, &alignment_as_expected); 16726ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Don't use Check here, as it will call Runtime_Abort possibly 16736ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // re-entering here. 16746ded16be15dd865a9b21ea304d5273c8be299c87Steve Block stop("Unexpected alignment"); 16756ded16be15dd865a9b21ea304d5273c8be299c87Steve Block bind(&alignment_as_expected); 16766ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 16776ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 16786ded16be15dd865a9b21ea304d5273c8be299c87Steve Block#endif 16796ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16806ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // Just call directly. The function called cannot cause a GC, or 16816ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // allow preemption, so the return address in the link register 16826ded16be15dd865a9b21ea304d5273c8be299c87Steve Block // stays correct. 16836ded16be15dd865a9b21ea304d5273c8be299c87Steve Block Call(function); 16846ded16be15dd865a9b21ea304d5273c8be299c87Steve Block int stack_passed_arguments = (num_arguments <= 4) ? 0 : num_arguments - 4; 16856ded16be15dd865a9b21ea304d5273c8be299c87Steve Block if (OS::ActivationFrameAlignment() > kPointerSize) { 16866ded16be15dd865a9b21ea304d5273c8be299c87Steve Block ldr(sp, MemOperand(sp, stack_passed_arguments * kPointerSize)); 16876ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } else { 16886ded16be15dd865a9b21ea304d5273c8be299c87Steve Block add(sp, sp, Operand(stack_passed_arguments * sizeof(kPointerSize))); 16896ded16be15dd865a9b21ea304d5273c8be299c87Steve Block } 16906ded16be15dd865a9b21ea304d5273c8be299c87Steve Block} 16916ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 16926ded16be15dd865a9b21ea304d5273c8be299c87Steve Block 1693a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#ifdef ENABLE_DEBUGGER_SUPPORT 1694a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCodePatcher::CodePatcher(byte* address, int instructions) 1695a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block : address_(address), 1696a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block instructions_(instructions), 1697a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block size_(instructions * Assembler::kInstrSize), 1698a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block masm_(address, size_ + Assembler::kGap) { 1699a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Create a new macro assembler pointing to the address of the code to patch. 1700a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // The size is adjusted with kGap on order for the assembler to generate size 1701a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // bytes of instructions without failing with buffer size constraints. 1702a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 1703a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1704a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1705a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1706a7e24c173cf37484693b9abb38e494fa7bd7baebSteve BlockCodePatcher::~CodePatcher() { 1707a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Indicate that code has changed. 1708a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block CPU::FlushICache(address_, size_); 1709a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1710a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block // Check that the code was patched as expected. 1711a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(masm_.pc_ == address_ + size_); 1712a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); 1713a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1714a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1715a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1716a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid CodePatcher::Emit(Instr x) { 1717a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block masm()->emit(x); 1718a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1719a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1720a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1721a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Blockvoid CodePatcher::Emit(Address addr) { 1722a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block masm()->emit(reinterpret_cast<Instr>(addr)); 1723a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} 1724a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block#endif // ENABLE_DEBUGGER_SUPPORT 1725a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1726a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block 1727a7e24c173cf37484693b9abb38e494fa7bd7baebSteve Block} } // namespace v8::internal 1728