[builtins] Implement %TypedArray%.prototype.map in the CSA

src/runtime/runtime-typedarray.cc

 // Copyright 2014 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/runtime/runtime-utils.h"
 
 #include "src/arguments.h"
 #include "src/elements.h"
 #include "src/factory.h"
 #include "src/messages.h"
@@ skipping 263 matching lines @@
   DCHECK_EQ(1, args.length());
   if (!args[0]->IsJSTypedArray()) {
     return isolate->heap()->false_value();
   }
 
   Handle<JSTypedArray> obj(JSTypedArray::cast(args[0]));
   return isolate->heap()->ToBoolean(obj->GetBuffer()->is_shared() &&
                                     obj->type() == kExternalInt32Array);
 }
 
+RUNTIME_FUNCTION(Runtime_TypedArraySpeciesCreateByLength) {
+  HandleScope scope(isolate);
+  DCHECK(args.length() == 2);
+  Handle<JSTypedArray> exemplar = args.at<JSTypedArray>(1);
+  Handle<Object> length = args.at(2);
+  int argc = 1;
+  ScopedVector<Handle<Object>> argv(argc);
+  argv[0] = length;
+  Handle<JSTypedArray> result_array;
+  // TODO(tebbi): Pass correct method name.
+  ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
+      isolate, result_array,
+      JSTypedArray::SpeciesCreate(isolate, exemplar, argc, argv.start(), ""));
+  return *result_array;
+}
+
 }  // namespace internal
 }  // namespace v8