Add signMask getter to Float32x4

runtime/vm/intermediate_language_mips.cc

Index: runtime/vm/intermediate_language_mips.cc
diff --git a/runtime/vm/intermediate_language_mips.cc b/runtime/vm/intermediate_language_mips.cc
index e84f41817bbca3ea3c821c76cd6b3b4226975bf0..334bc4c58380686385a50b65e09b852b06649e84 100644
--- a/runtime/vm/intermediate_language_mips.cc
+++ b/runtime/vm/intermediate_language_mips.cc
@@ -3041,6 +3041,17 @@ void Uint32x4GetFlagInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
 }
 
 
+LocationSummary* Simd32x4GetSignMaskInstr::MakeLocationSummary() const {
+  UNIMPLEMENTED();
+  return NULL;
+}
+
+
+void Simd32x4GetSignMaskInstr::EmitNativeCode(FlowGraphCompiler* compiler) {
+  UNIMPLEMENTED();
+}
+
+
 LocationSummary* Uint32x4SelectInstr::MakeLocationSummary() const {
   UNIMPLEMENTED();
   return NULL;