ir3: Assemble and disassemble new swz/gat/sct instructions
swz in particular will be useful to replace the xor dance in lower_parallel_copies in !9842 (merged). We could probably take advantage of the others with some work, though.
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swz in particular will be useful to replace the xor dance in lower_parallel_copies in !9842 (merged). We could probably take advantage of the others with some work, though.