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shader: read sample IDs from pixel ancillary input

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This commit is contained in:
nmzik
2026-09-06 06:54:38 +04:00
parent ace877ce28
commit b346f58b73
8 changed files with 91 additions and 20 deletions
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src/graphics/shader/recompiler/ir/passes/ConstantPropagation.cpp
+18 -11
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@@ -310,17 +310,24 @@ void FoldInstruction(Block& block, Block::iterator instruction) {
const auto* source = value.TryInstruction();
if (source != nullptr && source->GetOpcode() == ValueOpcode::GetBuiltin &&
source->Arg(0) == Value(static_cast<uint32_t>(StageInputKind::PackedAncillary)) &&
IsImmediate(offset, Type::U32) && IsImmediate(count, Type::U32) &&
offset.U32() >= 16u && offset.U32() < 27u && count.U32() != 0u &&
count.U32() <= 27u - offset.U32()) {
// Preserve the extraction (including sign extension) while exposing only its
// used hardware field. Other live ancillary fields remain unsupported.
const auto layer = block.PrependNewInst(
instruction, ValueOpcode::GetBuiltin,
{Value(static_cast<uint32_t>(StageInputKind::Layer)), Value(0u)});
inst.SetArg(0, Value(&*layer));
inst.SetArg(1, Value(offset.U32() - 16u));
return;
IsImmediate(offset, Type::U32) && IsImmediate(count, Type::U32) && count.U32() != 0u) {
constexpr struct {
uint32_t start;
uint32_t end;
StageInputKind kind;
} fields[] = {{8u, 12u, StageInputKind::SampleId}, {16u, 27u, StageInputKind::Layer}};
for (const auto& field: fields) {
if (offset.U32() >= field.start && offset.U32() < field.end &&
count.U32() <= field.end - offset.U32()) {
// Preserve extraction and sign extension while exposing only the used field.
const auto input = block.PrependNewInst(
instruction, ValueOpcode::GetBuiltin,
{Value(static_cast<uint32_t>(field.kind)), Value(0u)});
inst.SetArg(0, Value(&*input));
inst.SetArg(1, Value(offset.U32() - field.start));
return;
}
}
}
if (!IsImmediate(value, Type::U32) || !IsImmediate(offset, Type::U32) ||
!IsImmediate(count, Type::U32) || offset.U32() > 32u ||