MIPS: [turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

src/compiler/mips/instruction-selector-mips.cc

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 076e47d4dfa07efdc99d6677f2e773ab55f90203..843f4a7c29b7e81999710de483c26aa932df7093 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -540,7 +540,7 @@ void InstructionSelector::VisitTruncateFloat32ToInt32(Node* node) {
 
 
 void InstructionSelector::VisitTruncateFloat32ToUint32(Node* node) {
-  UNIMPLEMENTED();
+  VisitRR(this, kMipsTruncUwS, node);
 }