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Reuse whole-wave ballot and first-lane SPIR-V results

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nmzik
2026-10-01 22:04:56 +04:00
parent 64eea6b32d
commit f29bd0fe35
2 changed files with 29 additions and 0 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterProgram.cpp
+6
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@@ -243,6 +243,12 @@ 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.
ctx.Define(inst, ctx.other_half->Result(inst));
return;
}
switch (inst.GetOpcode()) {
#define VALUE_OPCODE(name, ...) \
case IR::ValueOpcode::name: return Invoke(Emit##name, ctx, inst);