Hi, On May 13, 2007, at 3:56 , Zuxy Meng wrote: Hi, 3DNow! and SSSE3 provide instructions for packed mulplication with rounding (pmulhrw and pmulhrsw respectively) which can be used to replace pmulhw+paddw+psarw. Someone willing to test it on Core 2? What kind of sample would be a good test? MPEG-4 ASP, AVC, .... ? Guillaume