> I have an optimized SSE-based resampling library that I bolted in PulseAudio. It was > measured to bring a 2x speed-up over speex, mainly because it uses fixed-tables > instead of interpolations, the price being that it can only be used for fixed-rate > sinks/sources. > Since it's hardware-specific, I'd need a means to enable/disable it at compile time, > using some kind of voodoo magic in configure.ac. Does anyone have pointers on SSE > detection logic? To make things safe, I also detect SSE at run time but would like to > disable it completely for other non-x86 or older platforms. CPUID processor instruction should provide all the details about the processor.
