https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Faster-arithmetic-operations/m-p/946188#M14905 Scalar shifts and the like are compiled in line by your compiler. A library function call would take longer than any reasonable compiler generated code. The main thing to watch is that you specify the architecture you want to optimize; for example, if you specify 'gcc -march=pentium4', the compiler will know about the P4 preference for a sequence of adds over a left shift or multiply.<BR />Another thing to watch is that you don't force unnecessary conversions between short int and int data types, and don't over-use short int.<BR />Only a vector library offers enough advantage for special instructions, to overcome the overhead of function calls. Tue, 14 Feb 2006 14:59:11 GMT TimP 2006-02-14T14:59:11Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Faster-arithmetic-operations/m-p/946187#M14904 <DIV>hi</DIV> <DIV>i am making an application that includes lotz of shift and other logical operations.These operations are performed on integers and shorts.</DIV> <DIV>Which Library should i be using to make these oeprations faster.I guess MKL deals with only vector arithmetics.plz give tips on where to start.</DIV> <DIV>bbye</DIV> Tue, 14 Feb 2006 14:36:14 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Faster-arithmetic-operations/m-p/946187#M14904 vindos 2006-02-14T14:36:14Z https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Faster-arithmetic-operations/m-p/946188#M14905 Scalar shifts and the like are compiled in line by your compiler. A library function call would take longer than any reasonable compiler generated code. The main thing to watch is that you specify the architecture you want to optimize; for example, if you specify 'gcc -march=pentium4', the compiler will know about the P4 preference for a sequence of adds over a left shift or multiply.<BR />Another thing to watch is that you don't force unnecessary conversions between short int and int data types, and don't over-use short int.<BR />Only a vector library offers enough advantage for special instructions, to overcome the overhead of function calls. Tue, 14 Feb 2006 14:59:11 GMT https://community.intel.com/t5/Intel-oneAPI-Math-Kernel-Library/Faster-arithmetic-operations/m-p/946188#M14905 TimP 2006-02-14T14:59:11Z