Revert of Expose SIMD.Float32x4 type to Javascript.

src/x64/code-stubs-x64.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.
 
 #include "src/v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "src/bootstrapper.h"
 #include "src/code-stubs.h"
@@ skipping 1558 matching lines @@
     __ j(equal, &heap_number, Label::kNear);
     if (cc != equal) {
       __ movp(rcx, FieldOperand(rax, HeapObject::kMapOffset));
       __ movzxbl(rcx, FieldOperand(rcx, Map::kInstanceTypeOffset));
       // Call runtime on identical objects.  Otherwise return equal.
       __ cmpb(rcx, Immediate(static_cast<uint8_t>(FIRST_SPEC_OBJECT_TYPE)));
       __ j(above_equal, &runtime_call, Label::kFar);
       // Call runtime on identical symbols since we need to throw a TypeError.
       __ cmpb(rcx, Immediate(static_cast<uint8_t>(SYMBOL_TYPE)));
       __ j(equal, &runtime_call, Label::kFar);
-      // Call runtime on identical SIMD values since we must throw a TypeError.
-      __ cmpb(rcx, Immediate(static_cast<uint8_t>(FLOAT32X4_TYPE)));
-      __ j(equal, &runtime_call, Label::kFar);
       if (is_strong(strength())) {
         // We have already tested for smis and heap numbers, so if both
         // arguments are not strings we must proceed to the slow case.
         __ testb(rcx, Immediate(kIsNotStringMask));
         __ j(not_zero, &runtime_call, Label::kFar);
       }
     }
     __ Set(rax, EQUAL);
     __ ret(0);
 
@@ skipping 3840 matching lines @@
                            kStackSpace, nullptr, return_value_operand, NULL);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64