On Tue, Jul 02, 2019 at 05:46:24PM -0400, Jeffrey Walton wrote: > We don't use <x86intrin.h> because it is missing on too many systems > we support (even those that use GCC). > > Is there a way to get GCC to provide the functions through a system > header as expected? #include <x86intrin.h> It *is* a system header. And it is provided by GCC, and it gives you _mm_roti_epi64, provided you have GCC 4.5 or later. If you don't want to use it, you're on your own. Good luck. Segher
