Eric Bavier <bav...@cray.com> skribis: > On Fri, Apr 06, 2018 at 10:05:43AM +0200, Ludovic Courtès wrote: >> Hello Eric, >> >> Eric Bavier <bav...@cray.com> skribis: >> >> > I recently discovered that the FFTW library can do runtime cpu >> > detection. In order to do this, the package needs to be configured to >> > build SIMD "codelets", like how our 'fftw-avx' currently does. Then, >> > based on the instruction support detected at runtime, make those >> > kernels available to the fftw "planner" for execution. >> >> That’s really good news! Thanks for testing it. >> >> The patch LGTM. Can you confirm that the planner won’t ever try to use >> the AVX2 codelets, for instance when running the test suite on an x86_64 >> box that lacks AVX2? > > Yes, I've successfully run 'make check' on an sse2-only machine where > '--enable-avx' and '--enable-avx2' where configured. I'll check on an > i686 machine tonight.
OK. >> If that’s the case, I’d be in favor of pushing this patch to core-updates. > > Great. I'll do some more testing. Should I send a finalized patch to > guix-patches when it's ready? If Marius has no objections, I think you could push it directly to core-updates. Thank you, Ludo’.
