[turbofan] Add TruncateFloat32ToUint32 operator to Turbofan.

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 749f581f696d50953de8ee75c3129082fa9838c9..13e5b636916cb243cc21cba0aba12ad030b9e75a 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -1088,6 +1088,9 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
     case kArm64Float64ToInt32:
       __ Fcvtzs(i.OutputRegister32(), i.InputDoubleRegister(0));
       break;
+    case kArm64Float32ToUint32:
+      __ Fcvtzu(i.OutputRegister32(), i.InputFloat32Register(0));
+      break;
     case kArm64Float64ToUint32:
       __ Fcvtzu(i.OutputRegister32(), i.InputDoubleRegister(0));
       break;