c++ Programming Glossary: unroll

http://stackoverflow.com/questions/190232/can-a-recursive-function-be-inline

a compiler can inline a recursive function much as it can unroll an infinite loop. It simply has to place a limit on the level.. simply has to place a limit on the level to which it will unroll the function. An optimizing compiler might turn this code inline..

Portable branch prediction hints

http://stackoverflow.com/questions/3702903/portable-branch-prediction-hints

portably. Many compilers support some form of #pragma unroll but it will still be necessary to guard it with some kind of..

How do I expand a tuple into variadic template function's arguments?

http://stackoverflow.com/questions/687490/how-do-i-expand-a-tuple-into-variadic-template-functions-arguments

Basically at compile time the compiler will recursively unroll all arguments in various inclusive function calls N calls N.. correct parameters @tparam N Number of tuple arguments to unroll @ingroup g_util_tuple template uint N struct apply_obj_func.. correct parameters @tparam N Number of tuple arguments to unroll @ingroup g_util_tuple template uint N struct apply_func template..

Should we still be optimizing “in the small”?

http://stackoverflow.com/questions/763656/should-we-still-be-optimizing-in-the-small

Lee goes into other optimizations such as inlining loop unrolling loop jamming loop inversion strength reduction and many others... is better at weighing all the factors than you. Loop unrolling is a purely mechanic operation and the compiler can do that.. will always be a multiple of 4 so you can safely unroll it 4 times . The compiler may not have this information so if..

How do optimizing compilers decide when and how much to unroll a loop?

http://stackoverflow.com/questions/7691215/how-do-optimizing-compilers-decide-when-and-how-much-to-unroll-a-loop

do optimizing compilers decide when and how much to unroll a loop When a compiler performs a loop unroll optimization.. how much to unroll a loop When a compiler performs a loop unroll optimization how does it determined by which factor to unroll.. optimization how does it determined by which factor to unroll the loop or whether to unroll the whole loop Since this is a..

how to achieve 4 FLOPs per cycle

http://stackoverflow.com/questions/8389648/how-to-achieve-4-flops-per-cycle

the 64 bit compiler from the SDK for Windows 7 does loop unrolling automatically and seems to try and arrange operations so.. Messer . The best I managed with gcc was to manually loop unroll and arrange additions and multiplications in groups of three... in groups of three. With g O2 march nocona addmul_unroll.cpp I get at best 0.207s 4.825 Gflops which corresponds to 1.8..

Is inline assembly language slower than native C++ code?

http://stackoverflow.com/questions/9601427/is-inline-assembly-language-slower-than-native-c-code

optimizations . The school book example for arrays is to unroll the cycle its size is known at compile time . Do it and run..