Revert of Remove SIMD.js from V8.

src/full-codegen/arm64/full-codegen-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/ast/compile-time-value.h"
 #include "src/ast/scopes.h"
 #include "src/builtins/builtins-constructor.h"
 #include "src/code-factory.h"
@@ skipping 2560 matching lines @@
   } else if (String::Equals(check, factory->object_string())) {
     ASM_LOCATION("FullCodeGenerator::EmitLiteralCompareTypeof object_string");
     __ JumpIfSmi(x0, if_false);
     __ JumpIfRoot(x0, Heap::kNullValueRootIndex, if_true);
     STATIC_ASSERT(LAST_JS_RECEIVER_TYPE == LAST_TYPE);
     __ JumpIfObjectType(x0, x10, x11, FIRST_JS_RECEIVER_TYPE, if_false, lt);
     // Check for callable or undetectable objects => false.
     __ Ldrb(x10, FieldMemOperand(x10, Map::kBitFieldOffset));
     __ TestAndSplit(x10, (1 << Map::kIsCallable) | (1 << Map::kIsUndetectable),
                     if_true, if_false, fall_through);
+// clang-format off
+#define SIMD128_TYPE(TYPE, Type, type, lane_count, lane_type)   \
+  } else if (String::Equals(check, factory->type##_string())) { \
+    ASM_LOCATION("FullCodeGenerator::EmitLiteralCompareTypeof " \
+                 #type "_string");                              \
+    __ JumpIfSmi(x0, if_true);                                  \
+    __ Ldr(x0, FieldMemOperand(x0, HeapObject::kMapOffset));    \
+    __ CompareRoot(x0, Heap::k##Type##MapRootIndex);            \
+    Split(eq, if_true, if_false, fall_through);
+  SIMD128_TYPES(SIMD128_TYPE)
+#undef SIMD128_TYPE
+    // clang-format on
   } else {
     ASM_LOCATION("FullCodeGenerator::EmitLiteralCompareTypeof other");
     if (if_false != fall_through) __ B(if_false);
   }
   context()->Plug(if_true, if_false);
 }
 
 
 void FullCodeGenerator::VisitCompareOperation(CompareOperation* expr) {
   Comment cmnt(masm_, "[ CompareOperation");
@@ skipping 307 matching lines @@
   }
 
   return INTERRUPT;
 }
 
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM64