[Atomics] code stubs for atomic operations

src/compiler/code-stub-assembler.h

Index: src/compiler/code-stub-assembler.h
diff --git a/src/compiler/code-stub-assembler.h b/src/compiler/code-stub-assembler.h
index b6b2bd4738419e6100366c8c1a18ceea18809bb6..7f298db9ff30dba7c00903e1787c94d8502cf2e0 100644
--- a/src/compiler/code-stub-assembler.h
+++ b/src/compiler/code-stub-assembler.h
@@ -34,9 +34,12 @@ class RawMachineLabel;
 class Schedule;
 
 #define CODE_STUB_ASSEMBLER_BINARY_OP_LIST(V) \
+  V(Float64Equal)                             \
   V(IntPtrAdd)                                \
   V(IntPtrSub)                                \
   V(Int32Add)                                 \
+  V(Int32LessThan)                            \
+  V(Int32GreaterThanOrEqual)                  \
   V(Int32Sub)                                 \
   V(Int32Mul)                                 \
   V(WordEqual)                                \
@@ -67,14 +70,25 @@ class Schedule;
   V(Word64Ror)                                \
   V(UintPtrGreaterThanOrEqual)
 
+#define CODE_STUB_ASSEMBLER_UNARY_OP_LIST(V) \
+  V(ChangeFloat64ToUint32)                   \
+  V(ChangeInt32ToInt64)                      \
+  V(ChangeUint32ToFloat64)
+
 class CodeStubAssembler {
  public:
+  // Create with CallStub linkage.
   // |result_size| specifies the number of results returned by the stub.
   // TODO(rmcilroy): move result_size to the CallInterfaceDescriptor.
   CodeStubAssembler(Isolate* isolate, Zone* zone,
                     const CallInterfaceDescriptor& descriptor,
                     Code::Flags flags, const char* name,
                     size_t result_size = 1);
+
+  // Create with JSCall linkage.
+  CodeStubAssembler(Isolate* isolate, Zone* zone, int parameter_count,
+                    Code::Flags flags, const char* name);
+
   virtual ~CodeStubAssembler();
 
   Handle<Code> GenerateCode();
@@ -142,12 +156,15 @@ class CodeStubAssembler {
   Node* WordShl(Node* value, int shift);
 
   // Conversions
-  Node* ChangeInt32ToInt64(Node* value);
+#define DECLARE_CODE_STUB_ASSEMBER_UNARY_OP(name) Node* name(Node* a);
+  CODE_STUB_ASSEMBLER_UNARY_OP_LIST(DECLARE_CODE_STUB_ASSEMBER_UNARY_OP)
+#undef DECLARE_CODE_STUB_ASSEMBER_UNARY_OP
 
   // Projections
   Node* Projection(int index, Node* value);
 
   // Calls
+  Node* Context();
   Node* CallRuntime(Runtime::FunctionId function_id, Node* context);
   Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1);
   Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1,
@@ -159,6 +176,7 @@ class CodeStubAssembler {
   Node* CallRuntime(Runtime::FunctionId function_id, Node* context, Node* arg1,
                     Node* arg2, Node* arg3, Node* arg4, Node* arg5);
 
+  Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context);
   Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context,
                         Node* arg1);
   Node* TailCallRuntime(Runtime::FunctionId function_id, Node* context,
@@ -204,12 +222,25 @@ class CodeStubAssembler {
   Node* LoadBufferObject(Node* buffer, int offset);
   // Load a field from an object on the heap.
   Node* LoadObjectField(Node* object, int offset);
+  // Load the HeapNumber value from a HeapNumber object.
+  Node* LoadHeapNumber(Node* object);
 
   // Load an array element from a FixedArray.
   Node* LoadFixedArrayElementSmiIndex(Node* object, Node* smi_index,
                                       int additional_offset = 0);
   Node* LoadFixedArrayElementConstantIndex(Node* object, int index);
 
+  Node* InstanceType(Node* object);
+
+  // Returns a node that is true if the given bit is set in |word32|.
+  template <typename T>
+  Node* BitFieldValue(Node* word32) {
+    return BitFieldValue(word32, T::kShift, T::kMask);
+  }
+
+  Node* BitFieldValue(Node* word32, uint32_t shift, uint32_t mask);
+
+
  protected:
   // Protected helpers which delegate to RawMachineAssembler.
   Graph* graph();
@@ -228,11 +259,15 @@ class CodeStubAssembler {
 
   Node* SmiShiftBitsConstant();
 
+  enum class LinkageDescriptorType { kStubCall, kJSCall };
+
   base::SmartPointer<RawMachineAssembler> raw_assembler_;
   Code::Flags flags_;
   const char* name_;
   bool code_generated_;
   ZoneVector<Variable::Impl*> variables_;
+  LinkageDescriptorType linkage_type_;
+  int parameter_count_;
 
   DISALLOW_COPY_AND_ASSIGN(CodeStubAssembler);
 };