Le mardi 6 d?cembre 2011 13:00:16 Nallasellan, Singaravelan, vous avez ?crit : > > 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. CPUID is not a complete solution. It will tell you whether the CPU supports certain instruction sets. But it does not specify whether the operating system supports the SSE registers "xmmX". Thus parsing /proc/cpuinfo is more reliable though obviously Linux-specific. -- R?mi Denis-Courmont http://www.remlab.net/ http://fi.linkedin.com/in/remidenis
