Merge pull request #4168 from ReinUsesLisp/global-memory

gl_arb_decompiler: Use NV_shader_buffer_{load,store} on assembly shaders

src/video_core/renderer_opengl/gl_arb_decompiler.cpp

@@ -185,10 +185,6 @@ std::string TextureType(const MetaTexture& meta) {
     return type;
 }
 
-std::string GlobalMemoryName(const GlobalMemoryBase& base) {
-    return fmt::format("gmem{}_{}", base.cbuf_index, base.cbuf_offset);
-}
-
 class ARBDecompiler final {
 public:
     explicit ARBDecompiler(const Device& device, const ShaderIR& ir, const Registry& registry,
@@ -199,6 +195,8 @@ public:
     }
 
 private:
+    void DefineGlobalMemory();
+
     void DeclareHeader();
     void DeclareVertex();
     void DeclareGeometry();
@@ -228,6 +226,7 @@ private:
 
     std::pair<std::string, std::size_t> BuildCoords(Operation);
     std::string BuildAoffi(Operation);
+    std::string GlobalMemoryPointer(const GmemNode& gmem);
     void Exit();
 
     std::string Assign(Operation);
@@ -378,10 +377,8 @@ private:
         std::string address;
         std::string_view opname;
         if (const auto gmem = std::get_if<GmemNode>(&*operation[0])) {
-            AddLine("SUB.U {}, {}, {};", temporary, Visit(gmem->GetRealAddress()),
-                    Visit(gmem->GetBaseAddress()));
-            address = fmt::format("{}[{}]", GlobalMemoryName(gmem->GetDescriptor()), temporary);
-            opname = "ATOMB";
+            address = GlobalMemoryPointer(*gmem);
+            opname = "ATOM";
         } else if (const auto smem = std::get_if<SmemNode>(&*operation[0])) {
             address = fmt::format("shared_mem[{}]", Visit(smem->GetAddress()));
             opname = "ATOMS";
@@ -456,9 +453,13 @@ private:
         shader_source += '\n';
     }
 
-    std::string AllocTemporary() {
-        max_temporaries = std::max(max_temporaries, num_temporaries + 1);
-        return fmt::format("T{}.x", num_temporaries++);
+    std::string AllocLongVectorTemporary() {
+        max_long_temporaries = std::max(max_long_temporaries, num_long_temporaries + 1);
+        return fmt::format("L{}", num_long_temporaries++);
+    }
+
+    std::string AllocLongTemporary() {
+        return fmt::format("{}.x", AllocLongVectorTemporary());
     }
 
     std::string AllocVectorTemporary() {
@@ -466,8 +467,13 @@ private:
         return fmt::format("T{}", num_temporaries++);
     }
 
+    std::string AllocTemporary() {
+        return fmt::format("{}.x", AllocVectorTemporary());
+    }
+
     void ResetTemporaries() noexcept {
         num_temporaries = 0;
+        num_long_temporaries = 0;
     }
 
     const Device& device;
@@ -478,6 +484,11 @@ private:
     std::size_t num_temporaries = 0;
     std::size_t max_temporaries = 0;
 
+    std::size_t num_long_temporaries = 0;
+    std::size_t max_long_temporaries = 0;
+
+    std::map<GlobalMemoryBase, u32> global_memory_names;
+
     std::string shader_source;
 
     static constexpr std::string_view ADD_F32 = "ADD.F32";
@@ -784,6 +795,8 @@ private:
 ARBDecompiler::ARBDecompiler(const Device& device, const ShaderIR& ir, const Registry& registry,
                              ShaderType stage, std::string_view identifier)
     : device{device}, ir{ir}, registry{registry}, stage{stage} {
+    DefineGlobalMemory();
+
     AddLine("TEMP RC;");
     AddLine("TEMP FSWZA[4];");
     AddLine("TEMP FSWZB[4];");
@@ -829,12 +842,20 @@ std::string_view HeaderStageName(ShaderType stage) {
     }
 }
 
+void ARBDecompiler::DefineGlobalMemory() {
+    u32 binding = 0;
+    for (const auto& pair : ir.GetGlobalMemory()) {
+        const GlobalMemoryBase base = pair.first;
+        global_memory_names.emplace(base, binding);
+        ++binding;
+    }
+}
+
 void ARBDecompiler::DeclareHeader() {
     AddLine("!!NV{}5.0", HeaderStageName(stage));
     // Enabling this allows us to cheat on some instructions like TXL with SHADOWARRAY2D
     AddLine("OPTION NV_internal;");
     AddLine("OPTION NV_gpu_program_fp64;");
-    AddLine("OPTION NV_shader_storage_buffer;");
     AddLine("OPTION NV_shader_thread_group;");
     if (ir.UsesWarps() && device.HasWarpIntrinsics()) {
         AddLine("OPTION NV_shader_thread_shuffle;");
@@ -951,11 +972,10 @@ void ARBDecompiler::DeclareLocalMemory() {
 }
 
 void ARBDecompiler::DeclareGlobalMemory() {
-    u32 binding = 0; // device.GetBaseBindings(stage).shader_storage_buffer;
-    for (const auto& pair : ir.GetGlobalMemory()) {
-        const auto& base = pair.first;
-        AddLine("STORAGE {}[] = {{ program.storage[{}] }};", GlobalMemoryName(base), binding);
-        ++binding;
+    const std::size_t num_entries = ir.GetGlobalMemory().size();
+    if (num_entries > 0) {
+        const std::size_t num_vectors = Common::AlignUp(num_entries, 2) / 2;
+        AddLine("PARAM c[{}] = {{ program.local[0..{}] }};", num_vectors, num_vectors - 1);
     }
 }
 
@@ -977,6 +997,9 @@ void ARBDecompiler::DeclareTemporaries() {
     for (std::size_t i = 0; i < max_temporaries; ++i) {
         AddLine("TEMP T{};", i);
     }
+    for (std::size_t i = 0; i < max_long_temporaries; ++i) {
+        AddLine("LONG TEMP L{};", i);
+    }
 }
 
 void ARBDecompiler::DeclarePredicates() {
@@ -1339,10 +1362,7 @@ std::string ARBDecompiler::Visit(const Node& node) {
 
     if (const auto gmem = std::get_if<GmemNode>(&*node)) {
         std::string temporary = AllocTemporary();
-        AddLine("SUB.U {}, {}, {};", temporary, Visit(gmem->GetRealAddress()),
-                Visit(gmem->GetBaseAddress()));
-        AddLine("LDB.U32 {}, {}[{}];", temporary, GlobalMemoryName(gmem->GetDescriptor()),
-                temporary);
+        AddLine("LOAD.U32 {}, {};", temporary, GlobalMemoryPointer(*gmem));
         return temporary;
     }
 
@@ -1419,6 +1439,22 @@ std::string ARBDecompiler::BuildAoffi(Operation operation) {
     return fmt::format(", offset({})", temporary);
 }
 
+std::string ARBDecompiler::GlobalMemoryPointer(const GmemNode& gmem) {
+    const u32 binding = global_memory_names.at(gmem.GetDescriptor());
+    const char result_swizzle = binding % 2 == 0 ? 'x' : 'y';
+
+    const std::string pointer = AllocLongVectorTemporary();
+    std::string temporary = AllocTemporary();
+
+    const u32 local_index = binding / 2;
+    AddLine("PK64.U {}, c[{}];", pointer, local_index);
+    AddLine("SUB.U {}, {}, {};", temporary, Visit(gmem.GetRealAddress()),
+            Visit(gmem.GetBaseAddress()));
+    AddLine("CVT.U64.U32 {}.z, {};", pointer, temporary);
+    AddLine("ADD.U64 {}.x, {}.{}, {}.z;", pointer, pointer, result_swizzle, pointer);
+    return fmt::format("{}.x", pointer);
+}
+
 void ARBDecompiler::Exit() {
     if (stage != ShaderType::Fragment) {
         AddLine("RET;");
@@ -1515,11 +1551,7 @@ std::string ARBDecompiler::Assign(Operation operation) {
         ResetTemporaries();
         return {};
     } else if (const auto gmem = std::get_if<GmemNode>(&*dest)) {
-        const std::string temporary = AllocTemporary();
-        AddLine("SUB.U {}, {}, {};", temporary, Visit(gmem->GetRealAddress()),
-                Visit(gmem->GetBaseAddress()));
-        AddLine("STB.U32 {}, {}[{}];", Visit(src), GlobalMemoryName(gmem->GetDescriptor()),
-                temporary);
+        AddLine("STORE.U32 {}, {};", Visit(src), GlobalMemoryPointer(*gmem));
         ResetTemporaries();
         return {};
     } else {

src/video_core/renderer_opengl/gl_buffer_cache.cpp

@@ -26,7 +26,7 @@ Buffer::Buffer(const Device& device, VAddr cpu_addr, std::size_t size)
     : VideoCommon::BufferBlock{cpu_addr, size} {
     gl_buffer.Create();
     glNamedBufferData(gl_buffer.handle, static_cast<GLsizeiptr>(size), nullptr, GL_DYNAMIC_DRAW);
-    if (device.HasVertexBufferUnifiedMemory()) {
+    if (device.UseAssemblyShaders() || device.HasVertexBufferUnifiedMemory()) {
         glMakeNamedBufferResidentNV(gl_buffer.handle, GL_READ_WRITE);
         glGetNamedBufferParameterui64vNV(gl_buffer.handle, GL_BUFFER_GPU_ADDRESS_NV, &gpu_address);
     }

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -139,6 +139,18 @@ void oglEnable(GLenum cap, bool state) {
     (state ? glEnable : glDisable)(cap);
 }
 
+void UpdateBindlessPointers(GLenum target, GLuint64EXT* pointers, std::size_t num_entries) {
+    if (num_entries == 0) {
+        return;
+    }
+    if (num_entries % 2 == 1) {
+        pointers[num_entries] = 0;
+    }
+    const GLsizei num_vectors = static_cast<GLsizei>((num_entries + 1) / 2);
+    glProgramLocalParametersI4uivNV(target, 0, num_vectors,
+                                    reinterpret_cast<const GLuint*>(pointers));
+}
+
 } // Anonymous namespace
 
 RasterizerOpenGL::RasterizerOpenGL(Core::System& system, Core::Frontend::EmuWindow& emu_window,
@@ -324,7 +336,6 @@ GLintptr RasterizerOpenGL::SetupIndexBuffer() {
 void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
     MICROPROFILE_SCOPE(OpenGL_Shader);
     auto& gpu = system.GPU().Maxwell3D();
-    std::size_t num_ssbos = 0;
     u32 clip_distances = 0;
 
     for (std::size_t index = 0; index < Maxwell::MaxShaderProgram; ++index) {
@@ -347,29 +358,13 @@ void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
         }
 
         // Currently this stages are not supported in the OpenGL backend.
-        // Todo(Blinkhawk): Port tesselation shaders from Vulkan to OpenGL
-        if (program == Maxwell::ShaderProgram::TesselationControl) {
+        // TODO(Blinkhawk): Port tesselation shaders from Vulkan to OpenGL
+        if (program == Maxwell::ShaderProgram::TesselationControl ||
+            program == Maxwell::ShaderProgram::TesselationEval) {
             continue;
-        } else if (program == Maxwell::ShaderProgram::TesselationEval) {
-            continue;
-        }
-
-        Shader* shader = shader_cache.GetStageProgram(program, async_shaders);
-
-        if (device.UseAssemblyShaders()) {
-            // Check for ARB limitation. We only have 16 SSBOs per context state. To workaround this
-            // all stages share the same bindings.
-            const std::size_t num_stage_ssbos = shader->GetEntries().global_memory_entries.size();
-            ASSERT_MSG(num_stage_ssbos == 0 || num_ssbos == 0, "SSBOs on more than one stage");
-            num_ssbos += num_stage_ssbos;
         }
 
-        // Stage indices are 0 - 5
-        const std::size_t stage = index == 0 ? 0 : index - 1;
-        SetupDrawConstBuffers(stage, shader);
-        SetupDrawGlobalMemory(stage, shader);
-        SetupDrawTextures(stage, shader);
-        SetupDrawImages(stage, shader);
+        Shader* const shader = shader_cache.GetStageProgram(program, async_shaders);
 
         const GLuint program_handle = shader->IsBuilt() ? shader->GetHandle() : 0;
         switch (program) {
@@ -388,6 +383,13 @@ void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
                               shader_config.enable.Value(), shader_config.offset);
         }
 
+        // Stage indices are 0 - 5
+        const std::size_t stage = index == 0 ? 0 : index - 1;
+        SetupDrawConstBuffers(stage, shader);
+        SetupDrawGlobalMemory(stage, shader);
+        SetupDrawTextures(stage, shader);
+        SetupDrawImages(stage, shader);
+
         // Workaround for Intel drivers.
         // When a clip distance is enabled but not set in the shader it crops parts of the screen
         // (sometimes it's half the screen, sometimes three quarters). To avoid this, enable the
@@ -749,6 +751,8 @@ void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
     current_cbuf = 0;
 
     auto kernel = shader_cache.GetComputeKernel(code_addr);
+    program_manager.BindCompute(kernel->GetHandle());
+
     SetupComputeTextures(kernel);
     SetupComputeImages(kernel);
 
@@ -763,7 +767,6 @@ void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
     buffer_cache.Unmap();
 
     const auto& launch_desc = system.GPU().KeplerCompute().launch_description;
-    program_manager.BindCompute(kernel->GetHandle());
     glDispatchCompute(launch_desc.grid_dim_x, launch_desc.grid_dim_y, launch_desc.grid_dim_z);
     ++num_queued_commands;
 }
@@ -1023,40 +1026,66 @@ void RasterizerOpenGL::SetupConstBuffer(GLenum stage, u32 binding,
 }
 
 void RasterizerOpenGL::SetupDrawGlobalMemory(std::size_t stage_index, Shader* shader) {
+    static constexpr std::array TARGET_LUT = {
+        GL_VERTEX_PROGRAM_NV,   GL_TESS_CONTROL_PROGRAM_NV, GL_TESS_EVALUATION_PROGRAM_NV,
+        GL_GEOMETRY_PROGRAM_NV, GL_FRAGMENT_PROGRAM_NV,
+    };
+
     auto& gpu{system.GPU()};
     auto& memory_manager{gpu.MemoryManager()};
-    const auto cbufs{gpu.Maxwell3D().state.shader_stages[stage_index]};
+    const auto& cbufs{gpu.Maxwell3D().state.shader_stages[stage_index]};
+    const auto& entries{shader->GetEntries().global_memory_entries};
+
+    std::array<GLuint64EXT, 32> pointers;
+    ASSERT(entries.size() < pointers.size());
 
-    u32 binding =
-        device.UseAssemblyShaders() ? 0 : device.GetBaseBindings(stage_index).shader_storage_buffer;
-    for (const auto& entry : shader->GetEntries().global_memory_entries) {
+    const bool assembly_shaders = device.UseAssemblyShaders();
+    u32 binding = assembly_shaders ? 0 : device.GetBaseBindings(stage_index).shader_storage_buffer;
+    for (const auto& entry : entries) {
         const GPUVAddr addr{cbufs.const_buffers[entry.cbuf_index].address + entry.cbuf_offset};
         const GPUVAddr gpu_addr{memory_manager.Read<u64>(addr)};
         const u32 size{memory_manager.Read<u32>(addr + 8)};
-        SetupGlobalMemory(binding++, entry, gpu_addr, size);
+        SetupGlobalMemory(binding, entry, gpu_addr, size, &pointers[binding]);
+        ++binding;
+    }
+    if (assembly_shaders) {
+        UpdateBindlessPointers(TARGET_LUT[stage_index], pointers.data(), entries.size());
     }
 }
 
 void RasterizerOpenGL::SetupComputeGlobalMemory(Shader* kernel) {
     auto& gpu{system.GPU()};
     auto& memory_manager{gpu.MemoryManager()};
-    const auto cbufs{gpu.KeplerCompute().launch_description.const_buffer_config};
+    const auto& cbufs{gpu.KeplerCompute().launch_description.const_buffer_config};
+    const auto& entries{kernel->GetEntries().global_memory_entries};
+
+    std::array<GLuint64EXT, 32> pointers;
+    ASSERT(entries.size() < pointers.size());
 
     u32 binding = 0;
-    for (const auto& entry : kernel->GetEntries().global_memory_entries) {
-        const auto addr{cbufs[entry.cbuf_index].Address() + entry.cbuf_offset};
-        const auto gpu_addr{memory_manager.Read<u64>(addr)};
-        const auto size{memory_manager.Read<u32>(addr + 8)};
-        SetupGlobalMemory(binding++, entry, gpu_addr, size);
+    for (const auto& entry : entries) {
+        const GPUVAddr addr{cbufs[entry.cbuf_index].Address() + entry.cbuf_offset};
+        const GPUVAddr gpu_addr{memory_manager.Read<u64>(addr)};
+        const u32 size{memory_manager.Read<u32>(addr + 8)};
+        SetupGlobalMemory(binding, entry, gpu_addr, size, &pointers[binding]);
+        ++binding;
+    }
+    if (device.UseAssemblyShaders()) {
+        UpdateBindlessPointers(GL_COMPUTE_PROGRAM_NV, pointers.data(), entries.size());
     }
 }
 
 void RasterizerOpenGL::SetupGlobalMemory(u32 binding, const GlobalMemoryEntry& entry,
-                                         GPUVAddr gpu_addr, std::size_t size) {
-    const auto alignment{device.GetShaderStorageBufferAlignment()};
+                                         GPUVAddr gpu_addr, std::size_t size,
+                                         GLuint64EXT* pointer) {
+    const std::size_t alignment{device.GetShaderStorageBufferAlignment()};
     const auto info = buffer_cache.UploadMemory(gpu_addr, size, alignment, entry.is_written);
+    if (device.UseAssemblyShaders()) {
+        *pointer = info.address + info.offset;
+    } else {
         glBindBufferRange(GL_SHADER_STORAGE_BUFFER, binding, info.handle, info.offset,
                           static_cast<GLsizeiptr>(size));
+    }
 }
 
 void RasterizerOpenGL::SetupDrawTextures(std::size_t stage_index, Shader* shader) {

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -124,9 +124,9 @@ private:
     /// Configures the current global memory entries to use for the kernel invocation.
     void SetupComputeGlobalMemory(Shader* kernel);
 
-    /// Configures a constant buffer.
+    /// Configures a global memory buffer.
     void SetupGlobalMemory(u32 binding, const GlobalMemoryEntry& entry, GPUVAddr gpu_addr,
-                           std::size_t size);
+                           std::size_t size, GLuint64EXT* pointer);
 
     /// Configures the current textures to use for the draw command.
     void SetupDrawTextures(std::size_t stage_index, Shader* shader);

src/video_core/renderer_opengl/gl_shader_manager.cpp

@@ -11,8 +11,30 @@
 
 namespace OpenGL {
 
-ProgramManager::ProgramManager(const Device& device) {
-    use_assembly_programs = device.UseAssemblyShaders();
+namespace {
+
+void BindProgram(GLenum stage, GLuint current, GLuint old, bool& enabled) {
+    if (current == old) {
+        return;
+    }
+    if (current == 0) {
+        if (enabled) {
+            enabled = false;
+            glDisable(stage);
+        }
+        return;
+    }
+    if (!enabled) {
+        enabled = true;
+        glEnable(stage);
+    }
+    glBindProgramARB(stage, current);
+}
+
+} // Anonymous namespace
+
+ProgramManager::ProgramManager(const Device& device)
+    : use_assembly_programs{device.UseAssemblyShaders()} {
     if (use_assembly_programs) {
         glEnable(GL_COMPUTE_PROGRAM_NV);
     } else {
@@ -33,9 +55,7 @@ void ProgramManager::BindCompute(GLuint program) {
 }
 
 void ProgramManager::BindGraphicsPipeline() {
-    if (use_assembly_programs) {
-        UpdateAssemblyPrograms();
-    } else {
+    if (!use_assembly_programs) {
         UpdateSourcePrograms();
     }
 }
@@ -63,32 +83,25 @@ void ProgramManager::RestoreGuestPipeline() {
     }
 }
 
-void ProgramManager::UpdateAssemblyPrograms() {
-    const auto update_state = [](GLenum stage, bool& enabled, GLuint current, GLuint old) {
-        if (current == old) {
-            return;
-        }
-        if (current == 0) {
-            if (enabled) {
-                enabled = false;
-                glDisable(stage);
-            }
-            return;
-        }
-        if (!enabled) {
-            enabled = true;
-            glEnable(stage);
+void ProgramManager::UseVertexShader(GLuint program) {
+    if (use_assembly_programs) {
+        BindProgram(GL_VERTEX_PROGRAM_NV, program, current_state.vertex, vertex_enabled);
     }
-        glBindProgramARB(stage, current);
-    };
+    current_state.vertex = program;
+}
 
-    update_state(GL_VERTEX_PROGRAM_NV, vertex_enabled, current_state.vertex, old_state.vertex);
-    update_state(GL_GEOMETRY_PROGRAM_NV, geometry_enabled, current_state.geometry,
-                 old_state.geometry);
-    update_state(GL_FRAGMENT_PROGRAM_NV, fragment_enabled, current_state.fragment,
-                 old_state.fragment);
+void ProgramManager::UseGeometryShader(GLuint program) {
+    if (use_assembly_programs) {
+        BindProgram(GL_GEOMETRY_PROGRAM_NV, program, current_state.vertex, geometry_enabled);
+    }
+    current_state.geometry = program;
+}
 
-    old_state = current_state;
+void ProgramManager::UseFragmentShader(GLuint program) {
+    if (use_assembly_programs) {
+        BindProgram(GL_FRAGMENT_PROGRAM_NV, program, current_state.vertex, fragment_enabled);
+    }
+    current_state.fragment = program;
 }
 
 void ProgramManager::UpdateSourcePrograms() {

src/video_core/renderer_opengl/gl_shader_manager.h

@@ -45,17 +45,9 @@ public:
     /// Rewinds BindHostPipeline state changes.
     void RestoreGuestPipeline();
 
-    void UseVertexShader(GLuint program) {
-        current_state.vertex = program;
-    }
-
-    void UseGeometryShader(GLuint program) {
-        current_state.geometry = program;
-    }
-
-    void UseFragmentShader(GLuint program) {
-        current_state.fragment = program;
-    }
+    void UseVertexShader(GLuint program);
+    void UseGeometryShader(GLuint program);
+    void UseFragmentShader(GLuint program);
 
 private:
     struct PipelineState {
@@ -64,9 +56,6 @@ private:
         GLuint fragment = 0;
     };
 
-    /// Update NV_gpu_program5 programs.
-    void UpdateAssemblyPrograms();
-
     /// Update GLSL programs.
     void UpdateSourcePrograms();
 

src/video_core/renderer_opengl/gl_stream_buffer.cpp

@@ -35,7 +35,7 @@ OGLStreamBuffer::OGLStreamBuffer(const Device& device, GLsizeiptr size, bool ver
     mapped_ptr = static_cast<u8*>(
         glMapNamedBufferRange(gl_buffer.handle, 0, buffer_size, flags | GL_MAP_FLUSH_EXPLICIT_BIT));
 
-    if (device.HasVertexBufferUnifiedMemory()) {
+    if (device.UseAssemblyShaders() || device.HasVertexBufferUnifiedMemory()) {
         glMakeNamedBufferResidentNV(gl_buffer.handle, GL_READ_ONLY);
         glGetNamedBufferParameterui64vNV(gl_buffer.handle, GL_BUFFER_GPU_ADDRESS_NV, &gpu_address);
     }