Revert of Remove SIMD.js from V8.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index f67aea74954c22aaa1203aef64df8ccccd063664..86734282dd3c83ea5325a123505c216f148e990a 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -791,6 +791,9 @@
       __ j(above_equal, &runtime_call, Label::kFar);
       // Call runtime on identical symbols since we need to throw a TypeError.
       __ cmpb(ecx, Immediate(SYMBOL_TYPE));
+      __ j(equal, &runtime_call, Label::kFar);
+      // Call runtime on identical SIMD values since we must throw a TypeError.
+      __ cmpb(ecx, Immediate(SIMD128_VALUE_TYPE));
       __ j(equal, &runtime_call, Label::kFar);
     }
     __ Move(eax, Immediate(Smi::FromInt(EQUAL)));