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a63fb51fdd
Implement VMLSV/VMLSVA (MVE multiply-subtract reduce) properly: new VN_Q_MVE (Qn at 19:17) and VM_Q_MVE (Qm at 3:1) encodings -- the actual 3-bit MVE Q fields -- with Rd at 15:12 (RDLO_A32). The earlier collision was from reusing the 4-bit VN_Q (19:16) and RD_T32 (11:8), which place the fields wrong; byte-exact vs llvm-mc now with distinct Qn/Qm/Rd. Drop three placeholder/redundant enum entries: VRINT and VPRINT (not real instructions -- llvm rejects bare 'vrint'; VPRINT is a printf-like debug pseudo-op), and VRSHL_MVE (the author's own comment marks it a placeholder; 'vrshl q,q,q' already decodes via VRSHL's MVE form). 600 tests green, verify matches llvm-mc.