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authorRob Clark <[email protected]>2019-10-11 15:57:22 -0700
committerRob Clark <[email protected]>2019-10-18 21:11:54 +0000
commit482e1b99558fdfa9fe23999400a2973acb3728a1 (patch)
tree2ceb9e699fe109f1eea16d7d853f8fcfb847e807 /src/loader/SConscript
parent11e467c378212e5aefaaa5246839d72764a54ea2 (diff)
freedreno/ir3: add meta instruction for pre-fs texture fetch
Add a placeholder instruction to track texture fetches made prior to FS shader dispatch. These, like meta:input instructions are scheduled before any real instructions, so that RA realizes their result values are live before the first real instruction. And to give legalize a way to track usage of fetched sample requiring (sy) sync flags. There is some related special handling for varying texcoord inputs used for pre-fs-fetch, so that they are not DCE'd and remain in linkage between FS and previous stage. Note that we could almost avoid this special handling by giving meta:tex_prefetch real src arguments, except that in the FS stage, inputs are actual bary.f/ldlv instructions. Signed-off-by: Rob Clark <[email protected]> Reviewed-by: Kristian H. Kristensen <[email protected]>
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