This is a follow-up to last week’s post, which discussed the fact that fully 30% of the 8086 processor’s 1-byte opcode space is given over to redundant opcodes (i.e. short forms of longer, more general opcodes). Today, I want to look, in a quick-and-dirty way, at how useful those opcodes might have been in practice. From at least one narrow perspective on a particular dataset, the vast majority of them seem to have been pretty worthless.
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