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So what stops x86 from adding the micro-ops as a dedicated alternate instruction set, Thumb style? Maybe with the implication that Intel will not hold the instr
by FeepingCreature 6y ago
So what stops x86 from adding the micro-ops as a dedicated alternate instruction set, Thumb style? Maybe with the implication that Intel will not hold the instruction set stable between chips, pushing vendors to compile to it on the fly?
- freemint 6y agoMirco Ops are usually much wider than instructions of the ISA. They are usually not multiple of 8 bits wide either. An dedicated alternative instruction set would be possible but that would take die space and make x86_64+mine even harder to decode.