Hi Ranjith, Sorry - partial answer, may be somewhat tangential. You can get the compiler to produce a list of optimization produced by a given optimization level list this: Example for C and -O2: echo "" | gcc -O2 -fverbose-asm -c -S -x c -; cat ./-.s; rm ./-.s Example for C++ and -O3: echo "" | g++ -O3 -fverbose-asm -c -S -x c++ -; cat ./-.s; rm ./-.s If you have them on your system, one way to access the SSE facilities is through the #include <mmintrin.h> and #include <xmmintrin.h> headers. HTH, --Eljay
