pan/mdg: Defer smul, vlut until after writeout moves
We can end up with bad dependencies with a depth/stencil export. Let's let the writeout special cases consume these values if possible, using a move otherwise in which case it won't be used in the other slots anyway. total instructions in shared programs: 50508 -> 50507 (<.01%) instructions in affected programs: 12 -> 11 (-8.33%) helped: 1 HURT: 0 total bundles in shared programs: 25640 -> 25640 (0.00%) bundles in affected programs: 0 -> 0 helped: 0 HURT: 0 total quadwords in shared programs: 40899 -> 40899 (0.00%) quadwords in affected programs: 0 -> 0 helped: 0 HURT: 0 total registers in shared programs: 3917 -> 3916 (-0.03%) registers in affected programs: 3 -> 2 (-33.33%) helped: 1 HURT: 0 total threads in shared programs: 2455 -> 2455 (0.00%) threads in affected programs: 0 -> 0 helped: 0 HURT: 0 total spills in shared programs: 168 -> 168 (0.00%) spills in affected programs: 0 -> 0 helped: 0 HURT: 0 total fills in shared programs: 186 -> 186 (0.00%) fills in affected programs: 0 -> 0 helped: 0 HURT: 0 Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5513>
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@ -1004,13 +1004,6 @@ mir_schedule_alu(
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predicate.no_cond = true;
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}
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if (writeout < PAN_WRITEOUT_Z)
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mir_choose_alu(&smul, instructions, worklist, len, &predicate, UNIT_SMUL);
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predicate.no_mask = writeout ? (1 << 3) : 0;
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mir_choose_alu(&vlut, instructions, worklist, len, &predicate, UNIT_VLUT);
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predicate.no_mask = 0;
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if (writeout) {
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/* Propagate up */
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bundle.last_writeout = branch->last_writeout;
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@ -1103,6 +1096,12 @@ mir_schedule_alu(
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vlut->unit = UNIT_VLUT;
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}
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mir_choose_alu(&smul, instructions, worklist, len, &predicate, UNIT_SMUL);
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predicate.no_mask = writeout ? (1 << 3) : 0;
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mir_choose_alu(&vlut, instructions, worklist, len, &predicate, UNIT_VLUT);
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predicate.no_mask = 0;
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mir_choose_alu(&vadd, instructions, worklist, len, &predicate, UNIT_VADD);
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mir_update_worklist(worklist, len, instructions, vlut);
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