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shader: lower complete wave minima for sparse fragment subgroups

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This commit is contained in:
nmzik
2026-10-14 18:03:48 +02:00
parent 892e70c8a1
commit 302240da70
12 changed files with 330 additions and 8 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterFlow.cpp
+12
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@@ -748,6 +748,18 @@ uint32_t EmitReadLane(ValueEmitContext& ctx, const IR::Inst& inst) {
return ctx.Shuffle(inst, 0, ctx.Arg(inst, 1));
}
uint32_t EmitSubgroupUMinU32(ValueEmitContext& ctx, const IR::Inst& inst) {
auto& state = ctx.state;
auto value = ctx.Arg(inst, 0);
if (ctx.other_half != nullptr) {
value = EmitUMin32(state, ctx.HalfArg(inst, 0, 0), ctx.HalfArg(inst, 0, 1));
}
const auto result = state.builder.AllocateId();
state.builder.AddFunction(spv::OpGroupNonUniformUMin, TypeU32(state), result,
ConstantU32(state, spv::ScopeSubgroup), spv::GroupOperationReduce, value);
return result;
}
uint32_t EmitWriteLane(ValueEmitContext& ctx, const IR::Inst& inst) {
auto& state = ctx.state;
const auto hit = state.builder.AllocateId();