1 files changed, 85 insertions, 0 deletions
diff --git a/compiler/llvm/runtime_support_builder_thumb2.cc b/compiler/llvm/runtime_support_builder_thumb2.cc
new file mode 100644
index 0000000000..2b9170c4ea
--- /dev/null
+++ b/compiler/llvm/runtime_support_builder_thumb2.cc
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "runtime_support_builder_thumb2.h"
+
+#include "ir_builder.h"
+#include "mirror/object.h"
+#include "monitor.h"
+#include "thread.h"
+#include "utils_llvm.h"
+
+#include <llvm/IR/DerivedTypes.h>
+#include <llvm/IR/Function.h>
+#include <llvm/IR/InlineAsm.h>
+#include <llvm/IR/Module.h>
+#include <llvm/IR/Type.h>
+
+#include <inttypes.h>
+#include <vector>
+
+using namespace llvm;
+
+namespace art {
+namespace llvm {
+
+
+void RuntimeSupportBuilderThumb2::EmitLockObject(::llvm::Value* object) {
+  FunctionType* func_ty = FunctionType::get(/*Result=*/irb_.getInt32Ty(),
+                                            /*Params=*/irb_.getJObjectTy(),
+                                            /*isVarArg=*/false);
+  // $0: result
+  // $1: object
+  // $2: temp
+  // $3: temp
+  std::string asms;
+  StringAppendF(&asms, "add $3, $1, #%"PRId32"\n", mirror::Object::MonitorOffset().Int32Value());
+  StringAppendF(&asms, "ldr $2, [r9, #%"PRId32"]\n", Thread::ThinLockIdOffset().Int32Value());
+  StringAppendF(&asms, "ldrex $0, [$3]\n");
+  StringAppendF(&asms, "lsl $2, $2, %d\n", LW_LOCK_OWNER_SHIFT);
+  StringAppendF(&asms, "bfi $2, $0, #0, #%d\n", LW_LOCK_OWNER_SHIFT - 1);
+  StringAppendF(&asms, "bfc $0, #%d, #%d\n", LW_HASH_STATE_SHIFT, LW_LOCK_OWNER_SHIFT - 1);
+  StringAppendF(&asms, "cmp $0, #0\n");
+  StringAppendF(&asms, "it eq\n");
+  StringAppendF(&asms, "strexeq $0, $2, [$3]\n");
+
+  InlineAsm* func = InlineAsm::get(func_ty, asms, "=&l,l,~l,~l", true);
+
+  ::llvm::Value* retry_slow_path = irb_.CreateCall(func, object);
+  retry_slow_path = irb_.CreateICmpNE(retry_slow_path, irb_.getJInt(0));
+
+  ::llvm::Function* parent_func = irb_.GetInsertBlock()->getParent();
+  BasicBlock* basic_block_lock = BasicBlock::Create(context_, "lock", parent_func);
+  BasicBlock* basic_block_cont = BasicBlock::Create(context_, "lock_cont", parent_func);
+  irb_.CreateCondBr(retry_slow_path, basic_block_lock, basic_block_cont, kUnlikely);
+
+  irb_.SetInsertPoint(basic_block_lock);
+  Function* slow_func = GetRuntimeSupportFunction(runtime_support::LockObject);
+  irb_.CreateCall2(slow_func, object, EmitGetCurrentThread());
+  irb_.CreateBr(basic_block_cont);
+
+  irb_.SetInsertPoint(basic_block_cont);
+  { // Memory barrier
+    FunctionType* asm_ty = FunctionType::get(/*Result=*/Type::getVoidTy(context_),
+                                              /*isVarArg=*/false);
+    InlineAsm* func = InlineAsm::get(asm_ty, "dmb sy", "", true);
+    irb_.CreateCall(func);
+  }
+}
+
+
+} // namespace llvm
+} // namespace art