Simon Pilgrim 7cae0daee6 [X86][Atom] Fix BSR/BSF uops + port usage
Both ports are required for BitScan ops. Update the uops counts + port usage based off the most recent llvm-exegesis captures (PR36895) and what Intel AoM / Agner reports as well.
2021-10-02 19:09:44 +01:00
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