Re: [libav-devel] [PATCH] lavu/timer: Use Intel's intrinsic header for rdtsc
On Sun, Sep 22, 2013 at 09:51:57AM -0400, Alex Smith wrote: On Sun, Sep 22, 2013 at 9:40 AM, Luca Barbato lu_z...@gentoo.org wrote: On 22/09/13 15:35, Alex Smith wrote: Maybe it has some Intel (ricer) magic? Is it needed or just nice to have? (the tag: should be either lavu: or timer:) Well you can use either, one is simply the way provided by Intel's own headers, the other is msvc/mingw (in this case). It's probably a stupid idea, perhaps more proper(?) but likely stupid. I'm sceptical as long as there is no real gain provided by this. Diego ___ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
[libav-devel] [PATCH] lavu/timer: Use Intel's intrinsic header for rdtsc
Maybe it has some Intel (ricer) magic? --- libavutil/x86/timer.h | 9 +++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/libavutil/x86/timer.h b/libavutil/x86/timer.h index cdd67dd..4e744ca 100644 --- a/libavutil/x86/timer.h +++ b/libavutil/x86/timer.h @@ -36,8 +36,13 @@ static inline uint64_t read_time(void) #elif HAVE_RDTSC -#include intrin.h -#define AV_READ_TIME __rdtsc +#if defined(__INTEL_COMPILER) +# include immintrin.h +# define AV_READ_TIME _rdtsc +#else +# include intrin.h +# define AV_READ_TIME __rdtsc +#endif #endif /* HAVE_INLINE_ASM */ -- 1.8.4.msysgit.0 ___ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
Re: [libav-devel] [PATCH] lavu/timer: Use Intel's intrinsic header for rdtsc
On 22/09/13 15:35, Alex Smith wrote: Maybe it has some Intel (ricer) magic? Is it needed or just nice to have? (the tag: should be either lavu: or timer:) lu ___ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
Re: [libav-devel] [PATCH] lavu/timer: Use Intel's intrinsic header for rdtsc
On Sun, Sep 22, 2013 at 9:40 AM, Luca Barbato lu_z...@gentoo.org wrote: On 22/09/13 15:35, Alex Smith wrote: Maybe it has some Intel (ricer) magic? Is it needed or just nice to have? (the tag: should be either lavu: or timer:) lu Well you can use either, one is simply the way provided by Intel's own headers, the other is msvc/mingw (in this case). It's probably a stupid idea, perhaps more proper(?) but likely stupid. ___ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
