On Tue, Jun 8, 2021 at 7:20 PM Bill Somerville <g4...@classdesign.com> wrote:
> On 09/06/2021 01:02, Richard Shaw wrote: > > On Tue, Jun 8, 2021 at 6:44 PM Bill Somerville <g4...@classdesign.com> > wrote: > >> >> The technology we will use is called AVX and that is present on all >> Intel CPUs branded Core i3/i5/i7/i9 (circa 2010 to present), it is also >> present on AMD CPUs since the Jaguar or Puma based CPU models (some late >> Athlon-II CPUs, all Zen based CPUs, including Ryzen) circa 2013 to >> present. >> > > Will this be auto-detected and used on demand? For linux distro's we can't > assume it's available and force enable it on the gcc command line. > > Thanks, > Richard > KF5OIM > > Richard, > > I did say "In order to gauge how much backwards compatibility for older > CPUs we will have to implement it would help to know who is using such > older processors." Of course we would build in support for older > technologies. > Not exactly what I meant. We (Fedora Linux) can only assume certain processor facilities can be "assumed" when targeting a specific platform (x86_64, i686, s390x, ppc, aarch64, etc.). Which is separate from my desire to take advantage of them. It's a bit more complicated, but it is possible to detect and use these features at runtime. Thanks, Richard KF5OIM
_______________________________________________ wsjt-devel mailing list wsjt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/wsjt-devel
