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c++ Programming Glossary: mulOperator Precedence vs Order of Evaluation http://stackoverflow.com/questions/5473107/operator-precedence-vs-order-of-evaluation z and still evaluate z before x or y push z push y push x mul add Summary Order of evaluation is independent of precedence... instructions executing in parallel just like if you used multiple threads on architectures with which most of us are more..
how to achieve 4 FLOPs per cycle http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle it take 3 cycles for an sse add and 5 cycles for a mul to complete on most of the modern Intel cpu's see e.g. Agner.. although I've not seen any proper doc on this add 's and mul 's can be executed in parallel giving a theoretical max throughput.. NULL return double t.tv_sec t.tv_usec 1000000.0 double addmul double add double mul int ops need to initialise differently..
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