[x86-64]: Add assembler and new utility methods for v128 extract_lane

titzer / virgil

A fast and lightweight native programming language

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Closed haoyu-zc closed 1 year ago

haoyu-zc commented 1 year ago

Added a new utility method emit_rex_bbb_r_r2 to match the encoding of v128 lane extractions.
Added four new test patterns for the assembler.