¡@
c++ Programming Glossary: sum1c++ 2d array access speed changes based on [a][b] order? [duplicate] http://stackoverflow.com/questions/13093155/c-2d-array-access-speed-changes-based-on-ab-order SIZE for int row 0 row SIZE row for int col 0 col SIZE col sum1 matrix row col Runs very quickly however is the above line sum1..... matrix row col Runs very quickly however is the above line sum1... is modified sum2 matrix col row As I did once on accident..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle differently otherwise compiler might optimise away double sum1 0.1 sum2 0.1 sum3 0.2 sum4 0.2 sum5 0.0 double mul1 1.0 mul2.. point ops inside the loop double expected 5.0 add loops sum1 sum2 sum3 sum4 sum5 pow mul loops mul1 mul2 mul3 mul4 mul5.. i 0 i loops i mul1 mul mul2 mul mul3 mul mul4 mul mul5 mul sum1 add sum2 add sum3 add sum4 add sum5 add return sum1 sum2 sum3..
|