Add SIMD.Float32x4 functions.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 91958652725464678ed0a5b82731a9b162721a4a..e05228479de4f39f0c601df8d6e80ad0747e6c35 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -1705,6 +1705,9 @@ void CompareICStub::GenerateGeneric(MacroAssembler* masm) {
       // Call runtime on identical symbols since we need to throw a TypeError.
       __ cmpb(ecx, static_cast<uint8_t>(SYMBOL_TYPE));
       __ j(equal, &runtime_call, Label::kFar);
+      // Call runtime on identical SIMD values too.
+      __ cmpb(ecx, 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.