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Alexej Szpevák
ba4b2db238
The Rosetta split covered only VEX scalar compares. #5642 measured the same lost load after legacy CMPSS and CMPSD, and the decoder already hands them to the matcher with the right length and RIP offset. Recognise F3 or F2, segment overrides and an optional REX before 0F C2 /r ib, with the same predicate rule as the VEX forms. A 66, 67 or LOCK prefix, or both F2 and F3, keeps the instruction inline as before.