Kevin Kofler <kevin.kof...@chello.at> writes: > Florian Weimer wrote: >> In general, that is not true. You can use the target function attribute >> and function multiversioning instead in many cases. > > This may (or may not) have been recently fixed, but last I checked, > intrinsics for a vector instruction set XYZ2 were only available with the > corresponding -mxyz2 flag, which could only be set per compilation unit > (attempting to use the recently introduced flag pragmas for this purpose was > not supported either), and which would lead to GCC in some cases (out of the > library programmer's control) using XYZ2 instructions also in other > functions. As a result, the only safe way was to put all XYZ2 code in a > separate compilation unit compiled with -mxyz2 (and only that compilation > unit can use that flag). Has that situation improved recently (and how so)?
I haven't needed to try it so far, but I'd trust Florian on the topic, given the GCC doc on function attributes and pragmas. You might not have intrinsics anyhow. _______________________________________________ devel mailing list -- devel@lists.fedoraproject.org To unsubscribe send an email to devel-le...@lists.fedoraproject.org Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@lists.fedoraproject.org
