Do I read agner.org correctly that movdqa was obsoleted by Nehalem, Silvermont and Bulldozer in the sense that movdqu is no worse than movdqa on those or later microarchitectures?
Do we have numbers of how our installed base is split between earlier than Nehalem/Silvermont/Bulldozer vs. Nehalem/Silvermont/Bulldozer or later? How much do we care about performance on microarchitectures earlier than Nehalem/Silvermont/Bulldozer? Would we want more readable, smaller and on Nehalem/Silvermont/Bulldozer or later potentially a bit faster code in exchange for a perf regression on pre-Nehalem/Silvermont/Bulldozer microarchitectures? (Notably, Core 2 Duo / Penryn at least used to be pretty popular and predates Nehalem.) -- Henri Sivonen [email protected] https://hsivonen.fi/ _______________________________________________ dev-platform mailing list [email protected] https://lists.mozilla.org/listinfo/dev-platform
