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shader: lower HS neighbour LDS reads, control-point output read-back, looped HS reflection and integer partitioning

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Co-authored-by: NeySlim <4509984+NeySlim@users.noreply.github.com>
This commit is contained in:
nmzik
2026-10-20 22:18:00 +02:00
parent 66f488a17f
commit 1ce663b5a9
3 changed files with 165 additions and 109 deletions
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src/graphics/shader/recompiler/backend/spirv/spirvEmitterTessellation.cpp
+9 -3
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@@ -56,8 +56,10 @@ uint32_t TessellationPointer(ValueEmitContext& ctx, const IR::Inst& inst) {
state.builder.AddFunction(spv::OpAccessChain, type, pointer, variable, attribute,
component);
} else {
// An HS writes only its own control point but may read any other.
const auto vertex =
kind == Attribute::ControlOutput
kind == Attribute::ControlOutput &&
inst.GetOpcode() == IR::ValueOpcode::SetTessellationAttribute
? EmitLaneId(state)
: EmitBinaryU32(state, spv::OpUDiv, address, ConstantU32(state, stride));
state.builder.AddFunction(spv::OpAccessChain, type, pointer, variable, vertex, attribute,
@@ -126,7 +128,9 @@ void DefineTessellationInterfaces(EmitterState& state) {
void DefineTessellationExecutionModes(EmitterState& state) {
const auto& tess = state.input_info.vertex->tess;
EXIT_NOT_IMPLEMENTED(tess.domain != 1u || tess.partitioning != 2u ||
// CxVgtTfParam: triangles, integer or fractional-odd partitioning, clockwise output.
EXIT_NOT_IMPLEMENTED(tess.domain != 1u ||
(tess.partitioning != 0u && tess.partitioning != 2u) ||
tess.output_topology != 2u);
state.builder.RequireCapability(spv::CapabilityTessellation);
if (state.program.stage == ShaderType::TessellationControl) {
@@ -134,7 +138,9 @@ void DefineTessellationExecutionModes(EmitterState& state) {
tess.output_control_points);
} else {
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeTriangles);
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeSpacingFractionalOdd);
state.builder.AddExecutionMode(
state.main_func, tess.partitioning == 0u ? spv::ExecutionModeSpacingEqual
: spv::ExecutionModeSpacingFractionalOdd);
state.builder.AddExecutionMode(state.main_func, spv::ExecutionModeVertexOrderCw);
}
}