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fix(shader): index hull control-point inputs with constant slots

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Co-Authored-By: Claude <[email protected]>
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Adrià FranchandClaude committed 2026-10-11 11:25:56 +02:00
1 parent e53e1762e3
commit a898efdb41
1 file changed
+9 -1
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core/shader/recompiler/SpirvBackend/src/SpirvModuleEmitter.cpp
+9 -1
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@@ -504,10 +504,18 @@ std::uint32_t TessellationPointer(SpirvValueEmitContext& ctx, const IrValue& ins
}
const bool local = kind == TessellationAttribute::LocalOutput || kind == TessellationAttribute::ControlInput;
const auto stride = local ? state.program.Metadata().tessellationLocalStride : state.program.Metadata().tessellationControlStride;
const auto type = TypePointer(state, storage, TypeU32(state));
const auto* sum = inst.Argument(1);
const auto* scaled = sum->Opcode() == IrOpcode::IAdd32 ? sum->Argument(0) : nullptr;
if (kind == TessellationAttribute::ControlInput && scaled != nullptr && sum->Argument(1)->HasImmediate() && scaled->Opcode() == IrOpcode::IMul32 && scaled->Argument(1)->HasImmediate() && scaled->Argument(1)->ImmediateU32() == stride) {
const auto constant = sum->Argument(1)->ImmediateU32();
const auto vertex = EmitBinaryU32(state, spv::OpIAdd, ctx.Arg(*scaled, 0), ConstantU32(state, constant / stride));
state.module.AddFunction(spv::OpAccessChain, type, pointer, variable, vertex, ConstantU32(state, constant % stride / 16u), ConstantU32(state, constant % 16u / 4u));
return pointer;
}
const auto offset = kind == TessellationAttribute::PatchOutput ? address : EmitBinaryU32(state, spv::OpUMod, address, ConstantU32(state, stride));
const auto attribute = EmitBinaryU32(state, spv::OpShiftRightLogical, offset, ConstantU32(state, 4u));
const auto component = EmitBinaryU32(state, spv::OpBitwiseAnd, EmitBinaryU32(state, spv::OpShiftRightLogical, offset, ConstantU32(state, 2u)), ConstantU32(state, 3u));
const auto type = TypePointer(state, storage, TypeU32(state));
if (kind == TessellationAttribute::LocalOutput || kind == TessellationAttribute::PatchOutput) {
state.module.AddFunction(spv::OpAccessChain, type, pointer, variable, attribute, component);
} else {