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shader: evaluate scalar branch decisions across the complete guest wave

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Claxten authored and nmzik committed 2026-10-07 21:17:35 +04:00
1 parent b96871e2bf
commit a8beac190f
4 files changed
+68 -25
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src/graphics/shader/recompiler/backend/spirv/SpirvEmitter.cpp
+4
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@@ -280,6 +280,10 @@ Emitter::SpirvRequirements Emitter::AnalyzeProgramRequirements(const IR::Program
switch (inst.GetOpcode()) {
case IR::ValueOpcode::StoreCompletion: requirements.subgroup_barrier = true; break;
case IR::ValueOpcode::BvhIntersect: requirements.bvh = true; break;
case IR::ValueOpcode::ConditionRef:
requirements.subgroup_ballot |=
inst.Flags<CFG::BranchCondition>() != CFG::BranchCondition::ScalarInstruction;
break;
case IR::ValueOpcode::Ballot: requirements.subgroup_ballot = true; break;
case IR::ValueOpcode::DppMoveU32:
case IR::ValueOpcode::ReadFirstLane: