lvqcl wrote: > I try to make my code more clean and have a few questions: > > 1. GCC related: MinGW contains cpuid.h header file that defines __get_cpuid() > function. Is it standard? Or is it better to use inline asm to get cpuid info?
cpuid.h should be good for all GCC related compilers. > 2. Is it good idea to do mаnual loop unrolling? > Unrolling FLAC__lpc_compute_autocorrelation_intrin_sse_lag_NN gives +2% speed > increase for flac -8 and +5% for flac -5. But it's true only for MSVS > compiles. > When I use Intel C compiler the difference is very small: 0.1% for 'flac -8' > and 0.5% for 'flac -5'. Would be interested to see what it does for GCC. > 3. How to properly compile functions that use different SSE versions? It seems > that a proper way is to create several units of translation and put all > functions > that use SSE1 to one .c file, all functions that use SSE2 to another .c file, > and so on. Is it correct? Yes, that makes sense. Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/ _______________________________________________ flac-dev mailing list flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev
