![]() help! can't conditionally perform this on each column, all columns must do the same thingĢ If the data is not contigous then loading the data into the SIMD instructions is cumbersomeģ The code is processor specific. If (a1= shift a2 >= shift a3 >= shift a4 >= shift This involves loading some data values that are contiguous in memory, doing the required processing and then stepping to the next set of values in the array.ġ If the code path is dependant on the data being processed, SIMD becomes much harder to implement. ![]() So, you won't get any advantage to using SSE as a straight replacement for the integer operations, you will only get advantages if you can do the operations on multiple data items at once. SIMD, of which SSE is an example, allows you to do the same operation on multiple chunks of data.
0 Comments
Leave a Reply. |