007c92b2ac
This commit used to be "brw/emit: Allow scalar sources to 64-bit 3-source instructions". These instructions were fixed up in brw_eu_emit. There seems to be some conflict with the <0,1,0> stride an post-RA scheduling. The only difference between the passing code generated by this commit and the failing code generated by the older commit is some post-RA scheduling. v2: Change the stride of a MAD even if the instruction isn't lowered. MAD instructions that are already SIMD8 have to follow the same rules. 🤦 v3: Pull the lowering out to its own pass. Update the comment in brw_fs_validate. Suggested by Ken. Reviewed-by: Kenneth Graunke <kenneth@whitecape.org> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29884>
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