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> This complexity is pushed down to operating systems, compilers, assemblers, debuggers.

Is that really true though? In my experience, the amount of complexity in a layered system is roughly constant, and if you make one layer simpler, you have to make another more complex.

I would expect that compiler for a RISC architecture, for example, needs to do a lot of work figuring out which set of 'simple' instructions encode an intent most efficiently. It also needs to deal with instruction scheduling and other issues that a RISC compiler does not care about.




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