[builtins] Migrate Number constructor similar to String constructor.

src/arm64/macro-assembler-arm64.cc

 // Copyright 2013 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_ARM64
 
 #include "src/base/bits.h"
 #include "src/base/division-by-constant.h"
 #include "src/bootstrapper.h"
 #include "src/codegen.h"
@@ skipping 3251 matching lines @@
                                       Register map,
                                       Register type_reg,
                                       InstanceType type,
                                       Label* if_cond_pass,
                                       Condition cond) {
   CompareObjectType(object, map, type_reg, type);
   B(cond, if_cond_pass);
 }
 
 
+void MacroAssembler::AllocateJSValue(Register result, Register constructor,
+                                     Register value, Register scratch1,
+                                     Register scratch2, Label* gc_required) {
+  DCHECK(!result.is(constructor));
+  DCHECK(!result.is(scratch1));
+  DCHECK(!result.is(scratch2));
+  DCHECK(!result.is(value));
+
+  // Allocate JSValue in new space.
+  Allocate(JSValue::kSize, result, scratch1, scratch2, gc_required, TAG_OBJECT);
+
+  // Initialize the JSValue.
+  LoadGlobalFunctionInitialMap(constructor, scratch1, scratch2);
+  Str(scratch1, FieldMemOperand(result, HeapObject::kMapOffset));
+  LoadRoot(scratch1, Heap::kEmptyFixedArrayRootIndex);
+  Str(scratch1, FieldMemOperand(result, JSObject::kPropertiesOffset));
+  Str(scratch1, FieldMemOperand(result, JSObject::kElementsOffset));
+  Str(value, FieldMemOperand(result, JSValue::kValueOffset));
+  STATIC_ASSERT(JSValue::kSize == 4 * kPointerSize);
+}
+
+
 void MacroAssembler::JumpIfNotObjectType(Register object,
                                          Register map,
                                          Register type_reg,
                                          InstanceType type,
                                          Label* if_not_object) {
   JumpIfObjectType(object, map, type_reg, type, if_not_object, ne);
 }
 
 
 // Sets condition flags based on comparison, and returns type in type_reg.
@@ skipping 1596 matching lines @@
 }
 
 
 #undef __
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64