Expose SIMD.Float32x4 type to Javascript.

src/mips64/code-stubs-mips64.cc

Index: src/mips64/code-stubs-mips64.cc
diff --git a/src/mips64/code-stubs-mips64.cc b/src/mips64/code-stubs-mips64.cc
index ac0ca9e95ebe36c1d1b21e14f89e11cf3003cf4d..9c1eba1f0cba3d74432929ec15523775dfa5bb7f 100644
--- a/src/mips64/code-stubs-mips64.cc
+++ b/src/mips64/code-stubs-mips64.cc
@@ -291,6 +291,8 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow,
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
+    // Call runtime on identical SIMD values since we must throw a TypeError.
+    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics, since
       // we need to throw a TypeError. Smis have already been ruled out.
@@ -305,6 +307,8 @@ static void EmitIdenticalObjectComparison(MacroAssembler* masm, Label* slow,
     __ Branch(slow, greater, t0, Operand(FIRST_SPEC_OBJECT_TYPE));
     // Call runtime on identical symbols since we need to throw a TypeError.
     __ Branch(slow, eq, t0, Operand(SYMBOL_TYPE));
+    // Call runtime on identical SIMD values since we must throw a TypeError.
+    __ Branch(slow, eq, t0, Operand(FLOAT32X4_TYPE));
     if (is_strong(strength)) {
       // Call the runtime on anything that is converted in the semantics,
       // since we need to throw a TypeError. Smis and heap numbers have