[Interpreter] Preparation for wide registers.

src/interpreter/interpreter.cc

 // Copyright 2015 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/interpreter/interpreter.h"
 
 #include "src/code-factory.h"
 #include "src/compiler.h"
 #include "src/compiler/interpreter-assembler.h"
 #include "src/factory.h"
@@ skipping 183 matching lines @@
 //
 // Store accumulator to register <dst>.
 void Interpreter::DoStar(compiler::InterpreterAssembler* assembler) {
   Node* reg_index = __ BytecodeOperandReg(0);
   Node* accumulator = __ GetAccumulator();
   __ StoreRegister(accumulator, reg_index);
   __ Dispatch();
 }
 
 
-// Exchange <reg8> <reg16>
-//
-// Exchange two registers.
-void Interpreter::DoExchange(compiler::InterpreterAssembler* assembler) {
-  Node* reg0_index = __ BytecodeOperandReg(0);
-  Node* reg1_index = __ BytecodeOperandReg(1);
-  Node* reg0_value = __ LoadRegister(reg0_index);
-  Node* reg1_value = __ LoadRegister(reg1_index);
-  __ StoreRegister(reg1_value, reg0_index);
-  __ StoreRegister(reg0_value, reg1_index);
-  __ Dispatch();
-}
-
-
-// ExchangeWide <reg16> <reg16>
-//
-// Exchange two registers.
-void Interpreter::DoExchangeWide(compiler::InterpreterAssembler* assembler) {
-  return DoExchange(assembler);
-}
-
-
 // Mov <src> <dst>
 //
 // Stores the value of register <src> to register <dst>.
 void Interpreter::DoMov(compiler::InterpreterAssembler* assembler) {
   Node* src_index = __ BytecodeOperandReg(0);
   Node* src_value = __ LoadRegister(src_index);
   Node* dst_index = __ BytecodeOperandReg(1);
   __ StoreRegister(src_value, dst_index);
   __ Dispatch();
 }
 
 
+// MovWide <src> <dst>
+//
+// Stores the value of register <src> to register <dst>.
+void Interpreter::DoMovWide(compiler::InterpreterAssembler* assembler) {
+  DoMov(assembler);
+}
+
+
 void Interpreter::DoLoadGlobal(Callable ic,
                                compiler::InterpreterAssembler* assembler) {
   // Get the global object.
   Node* context = __ GetContext();
   Node* native_context =
       __ LoadContextSlot(context, Context::NATIVE_CONTEXT_INDEX);
   Node* global = __ LoadContextSlot(native_context, Context::EXTENSION_INDEX);
 
   // Load the global via the LoadIC.
   Node* code_target = __ HeapConstant(ic.code());
@@ skipping 833 matching lines @@
 
 // CallWide <callable> <receiver> <arg_count>
 //
 // Call a JSfunction or Callable in |callable| with the |receiver| and
 // |arg_count| arguments in subsequent registers.
 void Interpreter::DoCallWide(compiler::InterpreterAssembler* assembler) {
   DoJSCall(assembler);
 }
 
 
-// CallRuntime <function_id> <first_arg> <arg_count>
-//
-// Call the runtime function |function_id| with the first argument in
-// register |first_arg| and |arg_count| arguments in subsequent
-// registers.
-void Interpreter::DoCallRuntime(compiler::InterpreterAssembler* assembler) {
+void Interpreter::DoCallRuntimeCommon(
+    compiler::InterpreterAssembler* assembler) {
   Node* function_id = __ BytecodeOperandIdx(0);
   Node* first_arg_reg = __ BytecodeOperandReg(1);
   Node* first_arg = __ RegisterLocation(first_arg_reg);
   Node* args_count = __ BytecodeOperandCount(2);
   Node* result = __ CallRuntime(function_id, first_arg, args_count);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
-// CallRuntimeForPair <function_id> <first_arg> <arg_count> <first_return>
+// CallRuntime <function_id> <first_arg> <arg_count>
 //
-// Call the runtime function |function_id| which returns a pair, with the
-// first argument in register |first_arg| and |arg_count| arguments in
-// subsequent registers. Returns the result in <first_return> and
-// <first_return + 1>
-void Interpreter::DoCallRuntimeForPair(
+// Call the runtime function |function_id| with the first argument in
+// register |first_arg| and |arg_count| arguments in subsequent
+// registers.
+void Interpreter::DoCallRuntime(compiler::InterpreterAssembler* assembler) {
+  DoCallRuntimeCommon(assembler);
+}
+
+
+// CallRuntime <function_id> <first_arg> <arg_count>
+//
+// Call the runtime function |function_id| with the first argument in
+// register |first_arg| and |arg_count| arguments in subsequent
+// registers.
+void Interpreter::DoCallRuntimeWide(compiler::InterpreterAssembler* assembler) {
+  DoCallRuntimeCommon(assembler);
+}
+
+
+void Interpreter::DoCallRuntimeForPairCommon(
     compiler::InterpreterAssembler* assembler) {
   // Call the runtime function.
   Node* function_id = __ BytecodeOperandIdx(0);
   Node* first_arg_reg = __ BytecodeOperandReg(1);
   Node* first_arg = __ RegisterLocation(first_arg_reg);
   Node* args_count = __ BytecodeOperandCount(2);
   Node* result_pair = __ CallRuntime(function_id, first_arg, args_count, 2);
 
   // Store the results in <first_return> and <first_return + 1>
   Node* first_return_reg = __ BytecodeOperandReg(3);
   Node* second_return_reg = __ NextRegister(first_return_reg);
   Node* result0 = __ Projection(0, result_pair);
   Node* result1 = __ Projection(1, result_pair);
   __ StoreRegister(result0, first_return_reg);
   __ StoreRegister(result1, second_return_reg);
-
   __ Dispatch();
 }
 
 
-// CallJSRuntime <context_index> <receiver> <arg_count>
+// CallRuntimeForPair <function_id> <first_arg> <arg_count> <first_return>
 //
-// Call the JS runtime function that has the |context_index| with the receiver
-// in register |receiver| and |arg_count| arguments in subsequent registers.
-void Interpreter::DoCallJSRuntime(compiler::InterpreterAssembler* assembler) {
+// Call the runtime function |function_id| which returns a pair, with the
+// first argument in register |first_arg| and |arg_count| arguments in
+// subsequent registers. Returns the result in <first_return> and
+// <first_return + 1>
+void Interpreter::DoCallRuntimeForPair(
+    compiler::InterpreterAssembler* assembler) {
+  DoCallRuntimeForPairCommon(assembler);
+}
+
+
+// CallRuntimeForPairWide <function_id> <first_arg> <arg_count> <first_return>
+//
+// Call the runtime function |function_id| which returns a pair, with the
+// first argument in register |first_arg| and |arg_count| arguments in
+// subsequent registers. Returns the result in <first_return> and
+// <first_return + 1>
+void Interpreter::DoCallRuntimeForPairWide(
+    compiler::InterpreterAssembler* assembler) {
+  DoCallRuntimeForPairCommon(assembler);
+}
+
+
+void Interpreter::DoCallJSRuntimeCommon(
+    compiler::InterpreterAssembler* assembler) {
   Node* context_index = __ BytecodeOperandIdx(0);
   Node* receiver_reg = __ BytecodeOperandReg(1);
   Node* first_arg = __ RegisterLocation(receiver_reg);
   Node* args_count = __ BytecodeOperandCount(2);
 
   // Get the function to call from the native context.
   Node* context = __ GetContext();
   Node* native_context =
       __ LoadContextSlot(context, Context::NATIVE_CONTEXT_INDEX);
   Node* function = __ LoadContextSlot(native_context, context_index);
 
   // Call the function.
   Node* result = __ CallJS(function, first_arg, args_count);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
-// New <constructor> <first_arg> <arg_count>
+// CallJSRuntime <context_index> <receiver> <arg_count>
 //
-// Call operator new with |constructor| and the first argument in
-// register |first_arg| and |arg_count| arguments in subsequent
+// Call the JS runtime function that has the |context_index| with the receiver
+// in register |receiver| and |arg_count| arguments in subsequent registers.
+void Interpreter::DoCallJSRuntime(compiler::InterpreterAssembler* assembler) {
+  DoCallJSRuntimeCommon(assembler);
+}
+
+
+// CallJSRuntimeWide <context_index> <receiver> <arg_count>
 //
-void Interpreter::DoNew(compiler::InterpreterAssembler* assembler) {
+// Call the JS runtime function that has the |context_index| with the receiver
+// in register |receiver| and |arg_count| arguments in subsequent registers.
+void Interpreter::DoCallJSRuntimeWide(
+    compiler::InterpreterAssembler* assembler) {
+  DoCallJSRuntimeCommon(assembler);
+}
+
+
+void Interpreter::DoCallConstruct(compiler::InterpreterAssembler* assembler) {
   Callable ic = CodeFactory::InterpreterPushArgsAndConstruct(isolate_);
   Node* constructor_reg = __ BytecodeOperandReg(0);
   Node* constructor = __ LoadRegister(constructor_reg);
   Node* first_arg_reg = __ BytecodeOperandReg(1);
   Node* first_arg = __ RegisterLocation(first_arg_reg);
   Node* args_count = __ BytecodeOperandCount(2);
   Node* result =
       __ CallConstruct(constructor, constructor, first_arg, args_count);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
+// New <constructor> <first_arg> <arg_count>
+//
+// Call operator new with |constructor| and the first argument in
+// register |first_arg| and |arg_count| arguments in subsequent
+//
+void Interpreter::DoNew(compiler::InterpreterAssembler* assembler) {
+  DoCallConstruct(assembler);
+}
+
+
+// NewWide <constructor> <first_arg> <arg_count>
+//
+// Call operator new with |constructor| and the first argument in
+// register |first_arg| and |arg_count| arguments in subsequent
+//
+void Interpreter::DoNewWide(compiler::InterpreterAssembler* assembler) {
+  DoCallConstruct(assembler);
+}
+
+
 // TestEqual <src>
 //
 // Test if the value in the <src> register equals the accumulator.
 void Interpreter::DoTestEqual(compiler::InterpreterAssembler* assembler) {
   DoBinaryOp(Runtime::kInterpreterEquals, assembler);
 }
 
 
 // TestNotEqual <src>
 //
@@ skipping 534 matching lines @@
   Node* result_triple = __ CallRuntime(Runtime::kForInPrepare, object);
 
   // Set output registers:
   //   0 == cache_type, 1 == cache_array, 2 == cache_length
   Node* output_register = __ BytecodeOperandReg(0);
   for (int i = 0; i < 3; i++) {
     Node* cache_info = __ Projection(i, result_triple);
     __ StoreRegister(cache_info, output_register);
     output_register = __ NextRegister(output_register);
   }
+  __ Dispatch();
+}
 
-  __ Dispatch();
+
+// ForInPrepareWide <cache_info_triple>
+//
+// Returns state for for..in loop execution based on the object in the
+// accumulator. The result is output in registers |cache_info_triple| to
+// |cache_info_triple + 2|, with the registers holding cache_type, cache_array,
+// and cache_length respectively.
+void Interpreter::DoForInPrepareWide(
+    compiler::InterpreterAssembler* assembler) {
+  DoForInPrepare(assembler);
 }
 
 
 // ForInNext <receiver> <index> <cache_info_pair>
 //
 // Returns the next enumerable property in the the accumulator.
 void Interpreter::DoForInNext(compiler::InterpreterAssembler* assembler) {
   Node* receiver_reg = __ BytecodeOperandReg(0);
   Node* receiver = __ LoadRegister(receiver_reg);
   Node* index_reg = __ BytecodeOperandReg(1);
   Node* index = __ LoadRegister(index_reg);
   Node* cache_type_reg = __ BytecodeOperandReg(2);
   Node* cache_type = __ LoadRegister(cache_type_reg);
   Node* cache_array_reg = __ NextRegister(cache_type_reg);
   Node* cache_array = __ LoadRegister(cache_array_reg);
   Node* result = __ CallRuntime(Runtime::kForInNext, receiver, cache_array,
                                 cache_type, index);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 
+// ForInNextWide <receiver> <index> <cache_info_pair>
+//
+// Returns the next enumerable property in the the accumulator.
+void Interpreter::DoForInNextWide(compiler::InterpreterAssembler* assembler) {
+  return DoForInNext(assembler);
+}
+
+
 // ForInDone <index> <cache_length>
 //
 // Returns true if the end of the enumerable properties has been reached.
 void Interpreter::DoForInDone(compiler::InterpreterAssembler* assembler) {
   // TODO(oth): Implement directly rather than making a runtime call.
   Node* index_reg = __ BytecodeOperandReg(0);
   Node* index = __ LoadRegister(index_reg);
   Node* cache_length_reg = __ BytecodeOperandReg(1);
   Node* cache_length = __ LoadRegister(cache_length_reg);
   Node* result = __ CallRuntime(Runtime::kForInDone, index, cache_length);
@@ skipping 11 matching lines @@
   Node* index_reg = __ BytecodeOperandReg(0);
   Node* index = __ LoadRegister(index_reg);
   Node* result = __ CallRuntime(Runtime::kForInStep, index);
   __ SetAccumulator(result);
   __ Dispatch();
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8