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Correct x86 instruction metadata - #136120
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Correct x86 instruction metadata used by the JIT for memory sizing, EVEX compressed displacement, masking, and operand mapping.
VPMULDQandVPMULUDQuse a 64-bit broadcast memory operand, so the JIT must scale their compressed displacements by eight bytes. Add signed and unsigned AVX-512 regression coverage for the adjacent-field case. The remaining changes correct related instruction metadata and add quarter-width tuple handling for EVEX sizing and lowering.Resolves #135844
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