x64: Migrate EVEX instructions to the new assembler #11303
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abrown
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…#11303) * x64: Migrate vpabsq to the new assembler * x64: Migrate vpopcntb to new assembler * x64: Migrate vpmullq to the new assembler * x64: Migrate vcvtudq2ps to the new assembler * x64: Migrate vpermi2b to new assembler * Fix test warnings
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The current backend didn't have many of these so they were pretty easy to migrate. Nothing major here for each instructions, they were all straightforward to migrate. This additionally removes most of the
encodingmodule in the x64 backend incranelift-codegenas the assembler now takes care of it all for us (yay!)