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Add dynarec codegen handlers for LODS byte/word/dword (opcodes 0xAC, 0xAD) using uop_CALL_FUNC for DF-conditional SI/ESI adjustment. This eliminates interpreter fallback for LODS which was a top hotspot.
Add flags_rebuild_zpna() that materializes only ZF/NF/PF/AF, skipping the expensive CF_SET() and VF_SET() computations. Use it in all 28 ROL/ROR dynarec paths, since FLAGS_ROLxx/RORxx compute CF and VF lazily from flags_res and only need Z/N/P/A from cpu_state.flags.
This reverts commit 51b45d5.
This reverts commit 1b4902a.
… performance *worse* under load.
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