Revert of Remove SIMD.js from V8.

src/arm/code-stubs-arm.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_ARM
 
 #include "src/code-stubs.h"
 #include "src/api-arguments.h"
 #include "src/base/bits.h"
 #include "src/bootstrapper.h"
@@ skipping 177 matching lines @@
   // so we do the second best thing - test it ourselves.
   // They are both equal and they are not both Smis so both of them are not
   // Smis.  If it's not a heap number, then return equal.
   if (cond == lt || cond == gt) {
     // Call runtime on identical JSObjects.
     __ CompareObjectType(r0, r4, r4, FIRST_JS_RECEIVER_TYPE);
     __ b(ge, slow);
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ cmp(r4, Operand(SYMBOL_TYPE));
     __ b(eq, slow);
+    // Call runtime on identical SIMD values since we must throw a TypeError.
+    __ cmp(r4, Operand(SIMD128_VALUE_TYPE));
+    __ b(eq, slow);
   } else {
     __ CompareObjectType(r0, r4, r4, HEAP_NUMBER_TYPE);
     __ b(eq, &heap_number);
     // Comparing JS objects with <=, >= is complicated.
     if (cond != eq) {
       __ cmp(r4, Operand(FIRST_JS_RECEIVER_TYPE));
       __ b(ge, slow);
       // Call runtime on identical symbols since we need to throw a TypeError.
       __ cmp(r4, Operand(SYMBOL_TYPE));
       __ b(eq, slow);
+      // Call runtime on identical SIMD values since we must throw a TypeError.
+      __ cmp(r4, Operand(SIMD128_VALUE_TYPE));
+      __ b(eq, slow);
       // Normally here we fall through to return_equal, but undefined is
       // special: (undefined == undefined) == true, but
       // (undefined <= undefined) == false!  See ECMAScript 11.8.5.
       if (cond == le || cond == ge) {
         __ cmp(r4, Operand(ODDBALL_TYPE));
         __ b(ne, &return_equal);
         __ LoadRoot(r2, Heap::kUndefinedValueRootIndex);
         __ cmp(r0, r2);
         __ b(ne, &return_equal);
         if (cond == le) {
@@ skipping 3100 matching lines @@
   CallApiFunctionAndReturn(masm, api_function_address, thunk_ref,
                            kStackUnwindSpace, NULL, return_value_operand, NULL);
 }
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM