> Wouldn't you compile the SSE routine in one source file with the switch, and the non-SSE routine in a different source file (along with all the rest of the other source code) without the switch. I guess I can always do that, but it's going to be messy trying to tell autoconf "compile this file with a different switch and only if this switch is enabled". Any idea how one would do that? > Then algorithmically determine if the SSE support is available and programmatically set a function pointer to the correct routine, and utilize the SSE or non-SSE routine via that function pointer mechanism. For simple functions, wouldn't that be slower than a plain "if" because of the branch prediction? Jean-Marc -- Jean-Marc Valin, M.Sc.A., ing. jr. LABORIUS (http://www.gel.usherb.ca/laborius) Université de Sherbrooke, Québec, Canada
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