I love writing code for old-school architectures like x86-64 and obsolete operating systems, like the Unix family
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the swift programming language is my fault to some degree. mostly here to see dogs, shitpost, fix old computers, and/or talk about math and weird computer programming things. for effortposts check the #longpost pinned tag. asks are open.
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in reply to @onfiv's post:
yes, the aesthetic of using instructions Intel thought were going to be the shit only to pretend they don't exist a chip generation later
A delightful quirk of x86 machines is that rep stosb or rep movsb, which were reasonably fast around the era of the Pentium Pro, but became less so when powerful SIMD became available, is now almost the fastest thing again: new hardware uses an "enhanced rep movsb and stosb operation" feature, so for smaller-than-gargantuan moves it can be best to just let the microcode figure it out.