runtime_support_builder_thumb2.cc revision 4c1c283a7410784e9cab309f868248690b788a9c
1b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa/* 2b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * Copyright (C) 2012 The Android Open Source Project 3b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * 4b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * Licensed under the Apache License, Version 2.0 (the "License"); 5b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * you may not use this file except in compliance with the License. 6b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * You may obtain a copy of the License at 7b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * 8b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * http://www.apache.org/licenses/LICENSE-2.0 9b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * 10b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * Unless required by applicable law or agreed to in writing, software 11b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * distributed under the License is distributed on an "AS IS" BASIS, 12b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * See the License for the specific language governing permissions and 14b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa * limitations under the License. 15b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa */ 16b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 17b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include "runtime_support_builder_thumb2.h" 18b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 19b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include "ir_builder.h" 202dd0e2cea360bc9206eb88ecc40d259e796c239dIan Rogers#include "mirror/object.h" 21b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include "monitor.h" 22b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include "thread.h" 23b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include "utils_llvm.h" 24b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 25b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <llvm/DerivedTypes.h> 26b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <llvm/Function.h> 27b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <llvm/InlineAsm.h> 28b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <llvm/Module.h> 29b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <llvm/Type.h> 30b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 31b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <inttypes.h> 32b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa#include <vector> 33b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 34b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYausing namespace llvm; 35b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 36b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYanamespace art { 374c1c283a7410784e9cab309f868248690b788a9cIan Rogersnamespace llvm { 38b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 39b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 404c1c283a7410784e9cab309f868248690b788a9cIan Rogersvoid RuntimeSupportBuilderThumb2::EmitLockObject(::llvm::Value* object) { 41b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa FunctionType* func_ty = FunctionType::get(/*Result=*/irb_.getInt32Ty(), 42b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa /*Params=*/irb_.getJObjectTy(), 43b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa /*isVarArg=*/false); 44b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa // $0: result 45b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa // $1: object 46b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa // $2: temp 47b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa // $3: temp 48b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa std::string asms; 4998573f907b2f5d1ccb4f6549a487f567599a82d3Ian Rogers StringAppendF(&asms, "add $3, $1, #%"PRId32"\n", mirror::Object::MonitorOffset().Int32Value()); 50b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "ldr $2, [r9, #%"PRId32"]\n", Thread::ThinLockIdOffset().Int32Value()); 51b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "ldrex $0, [$3]\n"); 52b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "lsl $2, $2, %d\n", LW_LOCK_OWNER_SHIFT); 53b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "bfi $2, $0, #0, #%d\n", LW_LOCK_OWNER_SHIFT - 1); 54b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "bfc $0, #%d, #%d\n", LW_HASH_STATE_SHIFT, LW_LOCK_OWNER_SHIFT - 1); 55b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "cmp $0, #0\n"); 56b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "it eq\n"); 57b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa StringAppendF(&asms, "strexeq $0, $2, [$3]\n"); 58b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 59b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa InlineAsm* func = InlineAsm::get(func_ty, asms, "=&l,l,~l,~l", true); 60b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 614c1c283a7410784e9cab309f868248690b788a9cIan Rogers ::llvm::Value* retry_slow_path = irb_.CreateCall(func, object); 62b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa retry_slow_path = irb_.CreateICmpNE(retry_slow_path, irb_.getJInt(0)); 63b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 644c1c283a7410784e9cab309f868248690b788a9cIan Rogers ::llvm::Function* parent_func = irb_.GetInsertBlock()->getParent(); 65b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa BasicBlock* basic_block_lock = BasicBlock::Create(context_, "lock", parent_func); 66b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa BasicBlock* basic_block_cont = BasicBlock::Create(context_, "lock_cont", parent_func); 67b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.CreateCondBr(retry_slow_path, basic_block_lock, basic_block_cont, kUnlikely); 68b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 69b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.SetInsertPoint(basic_block_lock); 70b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa Function* slow_func = GetRuntimeSupportFunction(runtime_support::LockObject); 71b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.CreateCall2(slow_func, object, EmitGetCurrentThread()); 72b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.CreateBr(basic_block_cont); 73b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 74b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.SetInsertPoint(basic_block_cont); 75b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa { // Memory barrier 76b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa FunctionType* asm_ty = FunctionType::get(/*Result=*/Type::getVoidTy(context_), 77b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa /*isVarArg=*/false); 78b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa InlineAsm* func = InlineAsm::get(asm_ty, "dmb sy", "", true); 79b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa irb_.CreateCall(func); 80b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa } 81b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa} 82b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 83b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa 844c1c283a7410784e9cab309f868248690b788a9cIan Rogers} // namespace llvm 85b08ed1255fc34b9f34bcea66cd5e0a292af3d698TDYa} // namespace art 86