diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/video_core/renderer_vulkan/vk_shader_decompiler.cpp | 136 |
1 files changed, 129 insertions, 7 deletions
diff --git a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp index e4c3e3d9c..5060dbba9 100644 --- a/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp +++ b/src/video_core/renderer_vulkan/vk_shader_decompiler.cpp @@ -494,25 +494,136 @@ private: return (this->*decompiler)(*operation); } else if (const auto gpr = std::get_if<GprNode>(node)) { - UNIMPLEMENTED(); + const u32 index = gpr->GetIndex(); + if (index == Register::ZeroIndex) { + return Constant(t_float, 0.0f); + } + return Emit(OpLoad(t_float, registers.at(index))); } else if (const auto immediate = std::get_if<ImmediateNode>(node)) { - UNIMPLEMENTED(); + return BitcastTo<Type::Float>(Constant(t_uint, immediate->GetValue())); } else if (const auto predicate = std::get_if<PredicateNode>(node)) { - UNIMPLEMENTED(); + const auto value = [&]() -> Id { + switch (const auto index = predicate->GetIndex(); index) { + case Tegra::Shader::Pred::UnusedIndex: + return v_true; + case Tegra::Shader::Pred::NeverExecute: + return v_false; + default: + return Emit(OpLoad(t_bool, predicates.at(index))); + } + }(); + if (predicate->IsNegated()) { + return Emit(OpLogicalNot(t_bool, value)); + } + return value; } else if (const auto abuf = std::get_if<AbufNode>(node)) { - UNIMPLEMENTED(); + const auto attribute = abuf->GetIndex(); + const auto element = abuf->GetElement(); + + switch (attribute) { + case Attribute::Index::Position: + if (stage != ShaderStage::Fragment) { + UNIMPLEMENTED(); + break; + } else { + if (element == 3) { + return Constant(t_float, 1.0f); + } + return Emit(OpLoad(t_float, AccessElement(t_in_float, frag_coord, element))); + } + case Attribute::Index::TessCoordInstanceIDVertexID: + // TODO(Subv): Find out what the values are for the first two elements when inside a + // vertex shader, and what's the value of the fourth element when inside a Tess Eval + // shader. + ASSERT(stage == ShaderStage::Vertex); + switch (element) { + case 2: + return BitcastFrom<Type::Uint>(Emit(OpLoad(t_uint, instance_index))); + case 3: + return BitcastFrom<Type::Uint>(Emit(OpLoad(t_uint, vertex_index))); + } + UNIMPLEMENTED_MSG("Unmanaged TessCoordInstanceIDVertexID element={}", element); + return Constant(t_float, 0); + case Attribute::Index::FrontFacing: + // TODO(Subv): Find out what the values are for the other elements. + ASSERT(stage == ShaderStage::Fragment); + if (element == 3) { + const Id is_front_facing = Emit(OpLoad(t_bool, front_facing)); + const Id true_value = + BitcastTo<Type::Float>(Constant(t_int, static_cast<s32>(-1))); + const Id false_value = BitcastTo<Type::Float>(Constant(t_int, 0)); + return Emit(OpSelect(t_float, is_front_facing, true_value, false_value)); + } + UNIMPLEMENTED_MSG("Unmanaged FrontFacing element={}", element); + return Constant(t_float, 0.0f); + default: + if (IsGenericAttribute(attribute)) { + const Id pointer = + AccessElement(t_in_float, input_attributes.at(attribute), element); + return Emit(OpLoad(t_float, pointer)); + } + break; + } + UNIMPLEMENTED_MSG("Unhandled input attribute: {}", static_cast<u32>(attribute)); } else if (const auto cbuf = std::get_if<CbufNode>(node)) { - UNIMPLEMENTED(); + const Node offset = cbuf->GetOffset(); + const Id buffer_id = constant_buffers.at(cbuf->GetIndex()); + + Id buffer_index{}; + Id buffer_element{}; + + if (const auto immediate = std::get_if<ImmediateNode>(offset)) { + // Direct access + const u32 offset_imm = immediate->GetValue(); + ASSERT(offset_imm % 4 == 0); + buffer_index = Constant(t_uint, offset_imm / 16); + buffer_element = Constant(t_uint, (offset_imm / 4) % 4); + + } else if (std::holds_alternative<OperationNode>(*offset)) { + // Indirect access + // TODO(Rodrigo): Use a uniform buffer stride of 4 and drop this slow math (which + // emits sub-optimal code on GLSL from my testing). + const Id offset_id = BitcastTo<Type::Uint>(Visit(offset)); + const Id unsafe_offset = Emit(OpUDiv(t_uint, offset_id, Constant(t_uint, 4))); + const Id final_offset = Emit( + OpUMod(t_uint, unsafe_offset, Constant(t_uint, MAX_CONSTBUFFER_ELEMENTS - 1))); + buffer_index = Emit(OpUDiv(t_uint, final_offset, Constant(t_uint, 4))); + buffer_element = Emit(OpUMod(t_uint, final_offset, Constant(t_uint, 4))); + + } else { + UNREACHABLE_MSG("Unmanaged offset node type"); + } + + const Id pointer = Emit(OpAccessChain(t_cbuf_float, buffer_id, Constant(t_uint, 0), + buffer_index, buffer_element)); + return Emit(OpLoad(t_float, pointer)); } else if (const auto gmem = std::get_if<GmemNode>(node)) { - UNIMPLEMENTED(); + const Id gmem_buffer = global_buffers.at(gmem->GetDescriptor()); + const Id real = BitcastTo<Type::Uint>(Visit(gmem->GetRealAddress())); + const Id base = BitcastTo<Type::Uint>(Visit(gmem->GetBaseAddress())); + + Id offset = Emit(OpISub(t_uint, real, base)); + offset = Emit(OpUDiv(t_uint, offset, Constant(t_uint, 4u))); + return Emit(OpLoad(t_float, Emit(OpAccessChain(t_gmem_float, gmem_buffer, + Constant(t_uint, 0u), offset)))); } else if (const auto conditional = std::get_if<ConditionalNode>(node)) { - UNIMPLEMENTED(); + // It's invalid to call conditional on nested nodes, use an operation instead + const Id true_label = OpLabel(); + const Id skip_label = OpLabel(); + Emit(OpBranchConditional(Visit(conditional->GetCondition()), true_label, skip_label)); + Emit(true_label); + + VisitBasicBlock(conditional->GetCode()); + + Emit(OpBranch(skip_label)); + Emit(skip_label); + return {}; } else if (const auto comment = std::get_if<CommentNode>(node)) { Name(Emit(OpUndef(t_void)), comment->GetText()); @@ -719,6 +830,17 @@ private: return false; } + template <typename... Args> + Id AccessElement(Id pointer_type, Id composite, Args... elements_) { + std::vector<Id> members; + auto elements = {elements_...}; + for (const auto element : elements) { + members.push_back(Constant(t_uint, element)); + } + + return Emit(OpAccessChain(pointer_type, composite, members)); + } + template <Type type> Id VisitOperand(Operation operation, std::size_t operand_index) { const Id value = Visit(operation[operand_index]); |