citra-qt: Add a vertex shader debugger.

1 files changed, 298 insertions, 0 deletions

diff --git a/src/citra_qt/debugger/graphics_vertex_shader.cpp b/src/citra_qt/debugger/graphics_vertex_shader.cpp
new file mode 100644
index 00000000..06eaf0bf
--- /dev/null
+++ b/src/citra_qt/debugger/graphics_vertex_shader.cpp
@@ -0,0 +1,298 @@
+// Copyright 2014 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <iomanip>
+#include <sstream>
+
+#include <QBoxLayout>
+#include <QTreeView>
+
+#include "video_core/vertex_shader.h"
+
+#include "graphics_vertex_shader.h"
+
+using nihstro::Instruction;
+using nihstro::SourceRegister;
+using nihstro::SwizzlePattern;
+
+GraphicsVertexShaderModel::GraphicsVertexShaderModel(QObject* parent): QAbstractItemModel(parent) {
+
+}
+
+QModelIndex GraphicsVertexShaderModel::index(int row, int column, const QModelIndex& parent) const {
+    return createIndex(row, column);
+}
+
+QModelIndex GraphicsVertexShaderModel::parent(const QModelIndex& child) const {
+    return QModelIndex();
+}
+
+int GraphicsVertexShaderModel::columnCount(const QModelIndex& parent) const {
+    return 3;
+}
+
+int GraphicsVertexShaderModel::rowCount(const QModelIndex& parent) const {
+    return info.code.size();
+}
+
+QVariant GraphicsVertexShaderModel::headerData(int section, Qt::Orientation orientation, int role) const {
+    switch(role) {
+    case Qt::DisplayRole:
+    {
+        if (section == 0) {
+            return tr("Offset");
+        } else if (section == 1) {
+            return tr("Raw");
+        } else if (section == 2) {
+            return tr("Disassembly");
+        }
+
+        break;
+    }
+    }
+
+    return QVariant();
+}
+
+QVariant GraphicsVertexShaderModel::data(const QModelIndex& index, int role) const {
+    switch (role) {
+    case Qt::DisplayRole:
+    {
+        switch (index.column()) {
+        case 0:
+            if (info.HasLabel(index.row()))
+                return QString::fromStdString(info.GetLabel(index.row()));
+
+            return QString("%1").arg(4*index.row(), 4, 16, QLatin1Char('0'));
+
+        case 1:
+            return QString("%1").arg(info.code[index.row()].hex, 8, 16, QLatin1Char('0'));
+
+        case 2:
+        {
+            std::stringstream output;
+            output.flags(std::ios::hex);
+
+            Instruction instr = info.code[index.row()];
+            const SwizzlePattern& swizzle = info.swizzle_info[instr.common.operand_desc_id].pattern;
+
+            // longest known instruction name: "setemit "
+            output << std::setw(8) << std::left << instr.opcode.GetInfo().name;
+
+            // e.g. "-c92.xyzw"
+            static auto print_input = [](std::stringstream& output, const SourceRegister& input,
+                                         bool negate, const std::string& swizzle_mask) {
+                output << std::setw(4) << std::right << (negate ? "-" : "") + input.GetName();
+                output << "." << swizzle_mask;
+            };
+
+            // e.g. "-c92[a0.x].xyzw"
+            static auto print_input_indexed = [](std::stringstream& output, const SourceRegister& input,
+                                                 bool negate, const std::string& swizzle_mask,
+                                                 const std::string& address_register_name) {
+                std::string relative_address;
+                if (!address_register_name.empty())
+                    relative_address = "[" + address_register_name + "]";
+
+                output << std::setw(10) << std::right << (negate ? "-" : "") + input.GetName() + relative_address;
+                output << "." << swizzle_mask;
+            };
+
+            // Use print_input or print_input_indexed depending on whether relative addressing is used or not.
+            static auto print_input_indexed_compact = [](std::stringstream& output, const SourceRegister& input,
+                                                         bool negate, const std::string& swizzle_mask,
+                                                         const std::string& address_register_name) {
+                if (address_register_name.empty())
+                    print_input(output, input, negate, swizzle_mask);
+                else
+                    print_input_indexed(output, input, negate, swizzle_mask, address_register_name);
+            };
+
+            switch (instr.opcode.GetInfo().type) {
+            case Instruction::OpCodeType::Trivial:
+                // Nothing to do here
+                break;
+
+            case Instruction::OpCodeType::Arithmetic:
+            {
+                // Use custom code for special instructions
+                switch (instr.opcode.EffectiveOpCode()) {
+                case Instruction::OpCode::CMP:
+                {
+                    // NOTE: CMP always writes both cc components, so we do not consider the dest mask here.
+                    output << std::setw(4) << std::right << "cc.";
+                    output << "xy    ";
+
+                    SourceRegister src1 = instr.common.GetSrc1(false);
+                    SourceRegister src2 = instr.common.GetSrc2(false);
+
+                    print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(0,1), instr.common.AddressRegisterName());
+                    output << " " << instr.common.compare_op.ToString(instr.common.compare_op.x) << " ";
+                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false).substr(0,1));
+
+                    output << ", ";
+
+                    print_input_indexed_compact(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false).substr(1,1), instr.common.AddressRegisterName());
+                    output << " " << instr.common.compare_op.ToString(instr.common.compare_op.y) << " ";
+                    print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false).substr(1,1));
+
+                    break;
+                }
+
+                default:
+                {
+                    bool src_is_inverted = 0 != (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::SrcInversed);
+
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::Dest) {
+                        // e.g. "r12.xy__"
+                        output << std::setw(4) << std::right << instr.common.dest.GetName() + ".";
+                        output << swizzle.DestMaskToString();
+                    } else if (instr.opcode.GetInfo().subtype == Instruction::OpCodeInfo::MOVA) {
+                        output << std::setw(4) << std::right << "a0.";
+                        output << swizzle.DestMaskToString();
+                    } else {
+                        output << "        ";
+                    }
+                    output << "  ";
+
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::Src1) {
+                        SourceRegister src1 = instr.common.GetSrc1(src_is_inverted);
+                        print_input_indexed(output, src1, swizzle.negate_src1, swizzle.SelectorToString(false), instr.common.AddressRegisterName());
+                    } else {
+                        output << "               ";
+                    }
+
+                    // TODO: In some cases, the Address Register is used as an index for SRC2 instead of SRC1
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::Src2) {
+                        SourceRegister src2 = instr.common.GetSrc2(src_is_inverted);
+                        print_input(output, src2, swizzle.negate_src2, swizzle.SelectorToString(false));
+                    }
+                    break;
+                }
+                }
+
+                break;
+            }
+
+            case Instruction::OpCodeType::Conditional:
+            {
+                switch (instr.opcode.EffectiveOpCode()) {
+                case Instruction::OpCode::LOOP:
+                    output << "(unknown instruction format)";
+                    break;
+
+                default:
+                    output << "if ";
+
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::HasCondition) {
+                        const char* ops[] = {
+                            " || ", " && ", "", ""
+                        };
+                        if (instr.flow_control.op != instr.flow_control.JustY)
+                            output << ((!instr.flow_control.refx) ? "!" : " ") << "cc.x";
+
+                        output << ops[instr.flow_control.op];
+
+                        if (instr.flow_control.op != instr.flow_control.JustX)
+                            output << ((!instr.flow_control.refy) ? "!" : " ") << "cc.y";
+
+                        output << " ";
+                    } else if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::HasUniformIndex) {
+                        output << "b" << instr.flow_control.bool_uniform_id << " ";
+                    }
+
+                    u32 target_addr = instr.flow_control.dest_offset;
+                    u32 target_addr_else = instr.flow_control.dest_offset;
+
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::HasAlternative) {
+                        output << "else jump to 0x" << std::setw(4) << std::right << std::setfill('0') << 4 * instr.flow_control.dest_offset << " ";
+                    } else if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::HasExplicitDest) {
+                        output << "jump to 0x" << std::setw(4) << std::right << std::setfill('0') << 4 * instr.flow_control.dest_offset << " ";
+                    } else {
+                        // TODO: Handle other cases
+                    }
+
+                    if (instr.opcode.GetInfo().subtype & Instruction::OpCodeInfo::HasFinishPoint) {
+                        output << "(return on " << std::setw(4) << std::right << std::setfill('0')
+                               << 4 * instr.flow_control.dest_offset + 4 * instr.flow_control.num_instructions << ")";
+                    }
+
+                    break;
+                }
+                break;
+            }
+
+            default:
+                output << "(unknown instruction format)";
+                break;
+            }
+
+            return QString::fromLatin1(output.str().c_str());
+        }
+
+        default:
+            break;
+        }
+    }
+
+    case Qt::FontRole:
+        return QFont("monospace");
+
+    default:
+        break;
+    }
+
+    return QVariant();
+}
+
+void GraphicsVertexShaderModel::OnUpdate()
+{
+    beginResetModel();
+
+    info.Clear();
+
+    for (auto instr : Pica::VertexShader::GetShaderBinary())
+        info.code.push_back({instr});
+
+    for (auto pattern : Pica::VertexShader::GetSwizzlePatterns())
+        info.swizzle_info.push_back({pattern});
+
+    info.labels.insert({Pica::registers.vs_main_offset, "main"});
+
+    endResetModel();
+}
+
+
+GraphicsVertexShaderWidget::GraphicsVertexShaderWidget(std::shared_ptr< Pica::DebugContext > debug_context,
+                                                       QWidget* parent)
+        : BreakPointObserverDock(debug_context, "Pica Vertex Shader", parent) {
+    setObjectName("PicaVertexShader");
+
+    auto binary_model = new GraphicsVertexShaderModel(this);
+    auto binary_list = new QTreeView;
+    binary_list->setModel(binary_model);
+    binary_list->setRootIsDecorated(false);
+    binary_list->setAlternatingRowColors(true);
+
+    connect(this, SIGNAL(Update()), binary_model, SLOT(OnUpdate()));
+
+    auto main_widget = new QWidget;
+    auto main_layout = new QVBoxLayout;
+    {
+        auto sub_layout = new QHBoxLayout;
+        sub_layout->addWidget(binary_list);
+        main_layout->addLayout(sub_layout);
+    }
+    main_widget->setLayout(main_layout);
+    setWidget(main_widget);
+}
+
+void GraphicsVertexShaderWidget::OnBreakPointHit(Pica::DebugContext::Event event, void* data) {
+    emit Update();
+    widget()->setEnabled(true);
+}
+
+void GraphicsVertexShaderWidget::OnResumed() {
+    widget()->setEnabled(false);
+}