If you've ever looked at the VAX instruction set, you'll possibly be surprised to see an essentially-Greenspun microcoded CPU (there's definitely list-walking instructions in there and all sorts of BIZARRE things).
One of the few CPUs I know of where "optimize for lowest instruction count" tends towards generating slower and larger code than either "optimize for smallest code size" or "optimize for fastest execution" (also the inly CPU I know of to have had a "optimize for instruction count" compiler, but taht may be by-the-by).
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Date: 2009-12-20 05:38 pm (UTC)One of the few CPUs I know of where "optimize for lowest instruction count" tends towards generating slower and larger code than either "optimize for smallest code size" or "optimize for fastest execution" (also the inly CPU I know of to have had a "optimize for instruction count" compiler, but taht may be by-the-by).