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shader: lower complete wave minima for sparse fragment subgroups

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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/spirvEmitterProgram.cpp
+3 -2
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@@ -226,8 +226,9 @@ void Invoke(Return (*emit)(Context&, Args...), ValueEmitContext& ctx, const IR::
void EmitDirectInstruction(ValueEmitContext& ctx, const IR::Inst& inst) {
if (ctx.half != 0 && (inst.GetOpcode() == IR::ValueOpcode::Ballot ||
inst.GetOpcode() == IR::ValueOpcode::ReadFirstLane)) {
// Both operations already combine both emulated halves into one whole-wave result.
inst.GetOpcode() == IR::ValueOpcode::ReadFirstLane ||
inst.GetOpcode() == IR::ValueOpcode::SubgroupUMinU32)) {
// These operations combine both emulated halves into one whole-wave result.
ctx.Define(inst, ctx.other_half->Result(inst));
return;
}