[es6] Introduce %ToInteger and %ToLength.

src/full-codegen/x64/full-codegen-x64.cc

 // Copyright 2012 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.
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/code-factory.h"
 #include "src/code-stubs.h"
 #include "src/codegen.h"
 #include "src/compiler.h"
@@ skipping 3643 matching lines @@
   // Update the write barrier.  Save the value as it will be
   // overwritten by the write barrier code and is needed afterward.
   __ movp(rdx, rax);
   __ RecordWriteField(rbx, JSValue::kValueOffset, rdx, rcx, kDontSaveFPRegs);
 
   __ bind(&done);
   context()->Plug(rax);
 }
 
 
+void FullCodeGenerator::EmitToInteger(CallRuntime* expr) {
+  ZoneList<Expression*>* args = expr->arguments();
+  DCHECK_EQ(1, args->length());
+
+  // Load the argument into rax and convert it.
+  VisitForAccumulatorValue(args->at(0));
+
+  // Convert the object to an integer.
+  Label done_convert;
+  __ JumpIfSmi(rax, &done_convert, Label::kNear);
+  __ Push(rax);
+  __ CallRuntime(Runtime::kToInteger, 1);
+  __ bind(&done_convert);
+  context()->Plug(rax);
+}
+
+
 void FullCodeGenerator::EmitNumberToString(CallRuntime* expr) {
   ZoneList<Expression*>* args = expr->arguments();
   DCHECK_EQ(args->length(), 1);
 
   // Load the argument into rax and call the stub.
   VisitForAccumulatorValue(args->at(0));
 
   NumberToStringStub stub(isolate());
   __ CallStub(&stub);
   context()->Plug(rax);
@@ skipping 1468 matching lines @@
             Assembler::target_address_at(call_target_address,
                                          unoptimized_code));
   return OSR_AFTER_STACK_CHECK;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64