[turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

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

Index: src/compiler/arm/code-generator-arm.cc
diff --git a/src/compiler/arm/code-generator-arm.cc b/src/compiler/arm/code-generator-arm.cc
index 13ce301560d0be7883981a0037661a05211f4171..ea920cb207951b04bfd51a7b149103d627bb0063 100644
--- a/src/compiler/arm/code-generator-arm.cc
+++ b/src/compiler/arm/code-generator-arm.cc
@@ -838,6 +838,13 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       DCHECK_EQ(LeaveCC, i.OutputSBit());
       break;
     }
+    case kArmVcvtF32U32: {
+      SwVfpRegister scratch = kScratchDoubleReg.low();
+      __ vmov(scratch, i.InputRegister(0));
+      __ vcvt_f32_u32(i.OutputFloat32Register(), scratch);
+      DCHECK_EQ(LeaveCC, i.OutputSBit());
+      break;
+    }
     case kArmVcvtF64S32: {
       SwVfpRegister scratch = kScratchDoubleReg.low();
       __ vmov(scratch, i.InputRegister(0));