[turbofan] Implemented the RoundUint64ToFloat32 TurboFan operator for x64, arm64,

src/ppc/macro-assembler-ppc.cc

Index: src/ppc/macro-assembler-ppc.cc
diff --git a/src/ppc/macro-assembler-ppc.cc b/src/ppc/macro-assembler-ppc.cc
index 711422af926eda870e6f8aded7f9f2856473099e..406b7707c703832cfb2edb3ccf21276afbcebb75 100644
--- a/src/ppc/macro-assembler-ppc.cc
+++ b/src/ppc/macro-assembler-ppc.cc
@@ -671,6 +671,13 @@ void MacroAssembler::ConvertInt64ToDouble(Register src,
 }
 
 
+void MacroAssembler::ConvertUnsignedInt64ToFloat(Register src,
+                                                 DoubleRegister double_dst) {
+  MovInt64ToDouble(double_dst, src);
+  fcfidus(double_dst, double_dst);
+}
+
+
 void MacroAssembler::ConvertUnsignedInt64ToDouble(Register src,
                                                   DoubleRegister double_dst) {
   MovInt64ToDouble(double_dst, src);