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shader: fix auxiliary position exports

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This commit is contained in:
nmzik
2026-08-22 02:58:35 +02:00
parent c130d74efc
commit a2baaccc6e
11 changed files with 532 additions and 10 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterFlow.cpp
+47
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@@ -367,6 +367,49 @@ uint32_t ExportVector(ValueEmitContext& ctx, uint32_t data, const IR::ExportInfo
return vector;
}
void EmitAuxPositionExport(ValueEmitContext& ctx, uint32_t data, const IR::ExportInfo& exp) {
auto& state = ctx.state;
for (uint32_t component = 0; component < 4; component++) {
if ((exp.en & (1u << component)) == 0) {
continue;
}
const auto output = IR::DecodePositionExportComponent(
state.input_info.vertex->pa_cl_vs_out_cntl, exp.index, component);
if (output.layer) {
const auto raw = ExportRawComponent(ctx, data, component);
const auto layer = state.builder.AllocateId();
state.builder.AddFunction({OpBitwiseAnd, TypeU32(state), layer, raw,
ConstantU32(state, 0x7ffu)});
state.builder.AddFunction({OpStore, state.layer_variable, layer});
continue;
}
if (!output.point_size && output.clip_distance == UINT32_MAX &&
output.cull_distance == UINT32_MAX) {
continue;
}
const auto raw = ExportRawComponent(ctx, data, component);
const auto f32 = state.builder.AllocateId();
state.builder.AddFunction({OpBitcast, TypeF32(state), f32, raw});
if (output.point_size) {
state.builder.AddFunction({OpStore, state.point_size_variable, f32});
continue;
}
auto StoreDistance = [&](uint32_t variable, uint32_t index) {
if (index == UINT32_MAX) {
return;
}
const auto pointer = state.builder.AllocateId();
state.builder.AddFunction(
{OpAccessChain, TypePointer(state, StorageClassOutput, TypeF32(state)), pointer,
variable, ConstantU32(state, index)});
state.builder.AddFunction({OpStore, pointer, f32});
};
StoreDistance(state.clip_distance_variable, output.clip_distance);
StoreDistance(state.cull_distance_variable, output.cull_distance);
}
}
void EmitExport(ValueEmitContext& ctx, const IR::Inst& inst) {
auto& state = ctx.state;
const auto& exp = ctx.Export(inst);
@@ -384,6 +427,10 @@ void EmitExport(ValueEmitContext& ctx, const IR::Inst& inst) {
}
EmitIfCondition(state, exec, [&]() {
const auto data = ctx.Arg(inst, 0);
if (exp.kind == IR::ExportTargetKind::Position && exp.index != 0) {
EmitAuxPositionExport(ctx, data, exp);
return;
}
if (exp.kind == IR::ExportTargetKind::MrtZ) {
if ((exp.en & 1u) != 0u && state.depth_variable != 0) {
const auto raw = ExportRawComponent(ctx, data, 0);