PPC: [turbofan] Add RoundUint32ToFloat32 operator to Turbofan.

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

Index: src/compiler/ppc/code-generator-ppc.cc
diff --git a/src/compiler/ppc/code-generator-ppc.cc b/src/compiler/ppc/code-generator-ppc.cc
index b87585a7844eaf0bf7159779157762b56fb1dc05..446c1d61e1c21fbdb15146636fa7cd227af06346 100644
--- a/src/compiler/ppc/code-generator-ppc.cc
+++ b/src/compiler/ppc/code-generator-ppc.cc
@@ -1196,14 +1196,18 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
 #endif
     case kPPC_Int32ToFloat32:
-      __ ConvertIntToFloat(i.OutputDoubleRegister(), i.InputRegister(0),
-                           kScratchReg);
+      __ ConvertIntToFloat(i.InputRegister(0), i.OutputDoubleRegister());
       DCHECK_EQ(LeaveRC, i.OutputRCBit());
       break;
     case kPPC_Int32ToDouble:
       __ ConvertIntToDouble(i.InputRegister(0), i.OutputDoubleRegister());
       DCHECK_EQ(LeaveRC, i.OutputRCBit());
       break;
+    case kPPC_Uint32ToFloat32:
+      __ ConvertUnsignedIntToFloat(i.InputRegister(0),
+                                   i.OutputDoubleRegister());
+      DCHECK_EQ(LeaveRC, i.OutputRCBit());
+      break;
     case kPPC_Uint32ToDouble:
       __ ConvertUnsignedIntToDouble(i.InputRegister(0),
                                     i.OutputDoubleRegister());