Unverified50% confidenceOpinionExact time
The confusion around ud2's numbering reflects the historical baggage of the x86 instruction set, which, in order to guarantee backward compatibility, cannot freely reassign opcodes and can only fit new encodings into whatever space remains in the existing encoding space.
1
Sources
50%
Confidence
Long-term
Relevance
9/13/2026
First Seen
Sources
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