Andrei Alexandrescu needs to read this

welkam wwwelkam at
Thu Oct 24 18:16:06 UTC 2019

On Wednesday, 23 October 2019 at 23:22:08 UTC, Walter Bright 
> instruction sets were a wacky collection of seemingly unrelated 
> instructions.

Yeah at some point compiler writers and chip designers were in 
competition on who can produce better code. You can look at those 
instructions as an attempt at peephole optimization.

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