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0 pointssylware2y ago0 comments

short and big "rep [sto|mov]s[bwdq]" hardware accelerated are very recent on AMD, I think you need at least a zen3.

0 comments

The instructions have been there since 1978.

Nice if they're finally making them fast after 45 years, but most people's software has to run on older CPUs (and Intel CPUs) too.

sylwareOP2y ago

This is exactly that, those were "accelerated" VERY recently. And 2 different versions: short and big memcpy/memset.

j / k navigate · click thread line to collapse

0 pointssylware2y ago0 comments

short and big "rep [sto|mov]s[bwdq]" hardware accelerated are very recent on AMD, I think you need at least a zen3.

The instructions have been there since 1978.

Nice if they're finally making them fast after 45 years, but most people's software has to run on older CPUs (and Intel CPUs) too.

sylwareOP2y ago

This is exactly that, those were "accelerated" VERY recently. And 2 different versions: short and big memcpy/memset.

j / k navigate · click thread line to collapse