On Tuesday May 09 2017 22:49:53 Allan Sandfeld Jensen wrote: Hi,
> Anything you can write with SIMD arrays is simple enough that the compiler > can > also auto-vectorize it as well. Just pretend the arrays you have are SIMD I've been out of this for a few years but I'd be surprised that were really accurate today. If it were people wouldn't be developing and using things like Vc. I think. I wouldn't at least :) I *am* willing to believe that auto-vectorised code can outperform hand-written SIMD code (and code using SIMD arrays) for certain classes of problems. I've seen at least one example of that (and that was about 7 years ago already). > > Also, to get SIMD support and auto-vectorisation you need the correct > > -march CPU flag, no? > > > You would need that too with any SIMD-library. Of course, but there you could probably also just use -D__SSE3__ -D__AVX__ etc. Cheers, R. _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
