Revert of Remove SIMD.js from V8.

src/s390/code-stubs-s390.cc

Index: src/s390/code-stubs-s390.cc
diff --git a/src/s390/code-stubs-s390.cc b/src/s390/code-stubs-s390.cc
index 50d23058d55b23846bca1a267e50b105a1413982..928341da7928a7a1a8cc662d7a8c36ae20af93f8 100644
--- a/src/s390/code-stubs-s390.cc
+++ b/src/s390/code-stubs-s390.cc
@@ -206,6 +206,9 @@
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ CmpP(r6, Operand(SYMBOL_TYPE));
     __ beq(slow);
+    // Call runtime on identical SIMD values since we must throw a TypeError.
+    __ CmpP(r6, Operand(SIMD128_VALUE_TYPE));
+    __ beq(slow);
   } else {
     __ CompareObjectType(r2, r6, r6, HEAP_NUMBER_TYPE);
     __ beq(&heap_number);
@@ -215,6 +218,9 @@
       __ bge(slow);
       // Call runtime on identical symbols since we need to throw a TypeError.
       __ CmpP(r6, Operand(SYMBOL_TYPE));
+      __ beq(slow);
+      // Call runtime on identical SIMD values since we must throw a TypeError.
+      __ CmpP(r6, Operand(SIMD128_VALUE_TYPE));
       __ beq(slow);
       // Normally here we fall through to return_equal, but undefined is
       // special: (undefined == undefined) == true, but