Merge pull request #2734 from ReinUsesLisp/compute-shaders

gl_rasterizer: Implement compute shaders

src/video_core/engines/kepler_compute.cpp

@@ -50,13 +50,14 @@ void KeplerCompute::CallMethod(const GPU::MethodCall& method_call) {
 }
 
 void KeplerCompute::ProcessLaunch() {
-
     const GPUVAddr launch_desc_loc = regs.launch_desc_loc.Address();
     memory_manager.ReadBlockUnsafe(launch_desc_loc, &launch_description,
                                    LaunchParams::NUM_LAUNCH_PARAMETERS * sizeof(u32));
 
-    const GPUVAddr code_loc = regs.code_loc.Address() + launch_description.program_start;
+    const GPUVAddr code_addr = regs.code_loc.Address() + launch_description.program_start;
-    LOG_WARNING(HW_GPU, "Compute Kernel Execute at Address 0x{:016x}, STUBBED", code_loc);
+    LOG_TRACE(HW_GPU, "Compute invocation launched at address 0x{:016x}", code_addr);
+
+    rasterizer.DispatchCompute(code_addr);
 }
 
 } // namespace Tegra::Engines

src/video_core/gpu.cpp

@@ -50,6 +50,14 @@ const Engines::Maxwell3D& GPU::Maxwell3D() const {
     return *maxwell_3d;
 }
 
+Engines::KeplerCompute& GPU::KeplerCompute() {
+    return *kepler_compute;
+}
+
+const Engines::KeplerCompute& GPU::KeplerCompute() const {
+    return *kepler_compute;
+}
+
 MemoryManager& GPU::MemoryManager() {
     return *memory_manager;
 }

src/video_core/gpu.h

@@ -155,6 +155,12 @@ public:
     /// Returns a const reference to the Maxwell3D GPU engine.
     const Engines::Maxwell3D& Maxwell3D() const;
 
+    /// Returns a reference to the KeplerCompute GPU engine.
+    Engines::KeplerCompute& KeplerCompute();
+
+    /// Returns a reference to the KeplerCompute GPU engine.
+    const Engines::KeplerCompute& KeplerCompute() const;
+
     /// Returns a reference to the GPU memory manager.
     Tegra::MemoryManager& MemoryManager();
 

src/video_core/rasterizer_interface.h

@@ -34,6 +34,9 @@ public:
     /// Clear the current framebuffer
     virtual void Clear() = 0;
 
+    /// Dispatches a compute shader invocation
+    virtual void DispatchCompute(GPUVAddr code_addr) = 0;
+
     /// Notify rasterizer that all caches should be flushed to Switch memory
     virtual void FlushAll() = 0;
 

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -4,6 +4,7 @@
 
 #include <algorithm>
 #include <array>
+#include <bitset>
 #include <memory>
 #include <string>
 #include <string_view>
@@ -19,6 +20,7 @@
 #include "core/core.h"
 #include "core/hle/kernel/process.h"
 #include "core/settings.h"
+#include "video_core/engines/kepler_compute.h"
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/memory_manager.h"
 #include "video_core/renderer_opengl/gl_rasterizer.h"
@@ -326,9 +328,9 @@ void RasterizerOpenGL::SetupShaders(GLenum primitive_mode) {
 
         Shader shader{shader_cache.GetStageProgram(program)};
 
-        const auto stage_enum{static_cast<Maxwell::ShaderStage>(stage)};
+        const auto stage_enum = static_cast<Maxwell::ShaderStage>(stage);
         SetupDrawConstBuffers(stage_enum, shader);
-        SetupGlobalRegions(stage_enum, shader);
+        SetupDrawGlobalMemory(stage_enum, shader);
         const auto texture_buffer_usage{SetupTextures(stage_enum, shader, base_bindings)};
 
         const ProgramVariant variant{base_bindings, primitive_mode, texture_buffer_usage};
@@ -783,6 +785,45 @@ void RasterizerOpenGL::DrawArrays() {
     gpu.dirty.memory_general = false;
 }
 
+void RasterizerOpenGL::DispatchCompute(GPUVAddr code_addr) {
+    if (!GLAD_GL_ARB_compute_variable_group_size) {
+        LOG_ERROR(Render_OpenGL, "Compute is currently not supported on this device due to the "
+                                 "lack of GL_ARB_compute_variable_group_size");
+        return;
+    }
+
+    auto kernel = shader_cache.GetComputeKernel(code_addr);
+    const auto [program, next_bindings] = kernel->GetProgramHandle({});
+    state.draw.shader_program = program;
+    state.draw.program_pipeline = 0;
+
+    const std::size_t buffer_size =
+        Tegra::Engines::KeplerCompute::NumConstBuffers *
+        (Maxwell::MaxConstBufferSize + device.GetUniformBufferAlignment());
+    buffer_cache.Map(buffer_size);
+
+    bind_ubo_pushbuffer.Setup(0);
+    bind_ssbo_pushbuffer.Setup(0);
+
+    SetupComputeConstBuffers(kernel);
+    SetupComputeGlobalMemory(kernel);
+
+    // TODO(Rodrigo): Bind images and samplers
+
+    buffer_cache.Unmap();
+
+    bind_ubo_pushbuffer.Bind();
+    bind_ssbo_pushbuffer.Bind();
+
+    state.ApplyShaderProgram();
+    state.ApplyProgramPipeline();
+
+    const auto& launch_desc = system.GPU().KeplerCompute().launch_description;
+    glDispatchComputeGroupSizeARB(launch_desc.grid_dim_x, launch_desc.grid_dim_y,
+                                  launch_desc.grid_dim_z, launch_desc.block_dim_x,
+                                  launch_desc.block_dim_y, launch_desc.block_dim_z);
+}
+
 void RasterizerOpenGL::FlushAll() {}
 
 void RasterizerOpenGL::FlushRegion(CacheAddr addr, u64 size) {
@@ -856,12 +897,25 @@ bool RasterizerOpenGL::AccelerateDisplay(const Tegra::FramebufferConfig& config,
 void RasterizerOpenGL::SetupDrawConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
                                              const Shader& shader) {
     MICROPROFILE_SCOPE(OpenGL_UBO);
-    const auto stage_index = static_cast<std::size_t>(stage);
+    const auto& stages = system.GPU().Maxwell3D().state.shader_stages;
-    const auto& shader_stage = system.GPU().Maxwell3D().state.shader_stages[stage_index];
+    const auto& shader_stage = stages[static_cast<std::size_t>(stage)];
-
-    // Upload only the enabled buffers from the 16 constbuffers of each shader stage
     for (const auto& entry : shader->GetShaderEntries().const_buffers) {
-        SetupConstBuffer(shader_stage.const_buffers[entry.GetIndex()], entry);
+        const auto& buffer = shader_stage.const_buffers[entry.GetIndex()];
+        SetupConstBuffer(buffer, entry);
+    }
+}
+
+void RasterizerOpenGL::SetupComputeConstBuffers(const Shader& kernel) {
+    MICROPROFILE_SCOPE(OpenGL_UBO);
+    const auto& launch_desc = system.GPU().KeplerCompute().launch_description;
+    for (const auto& entry : kernel->GetShaderEntries().const_buffers) {
+        const auto& config = launch_desc.const_buffer_config[entry.GetIndex()];
+        const std::bitset<8> mask = launch_desc.memory_config.const_buffer_enable_mask.Value();
+        Tegra::Engines::ConstBufferInfo buffer;
+        buffer.address = config.Address();
+        buffer.size = config.size;
+        buffer.enabled = mask[entry.GetIndex()];
+        SetupConstBuffer(buffer, entry);
     }
 }
 
@@ -882,24 +936,39 @@ void RasterizerOpenGL::SetupConstBuffer(const Tegra::Engines::ConstBufferInfo& b
     bind_ubo_pushbuffer.Push(cbuf, offset, size);
 }
 
-void RasterizerOpenGL::SetupGlobalRegions(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
+void RasterizerOpenGL::SetupDrawGlobalMemory(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
                                              const Shader& shader) {
     auto& gpu{system.GPU()};
     auto& memory_manager{gpu.MemoryManager()};
     const auto cbufs{gpu.Maxwell3D().state.shader_stages[static_cast<std::size_t>(stage)]};
-    const auto alignment{device.GetShaderStorageBufferAlignment()};
-
     for (const auto& entry : shader->GetShaderEntries().global_memory_entries) {
         const auto addr{cbufs.const_buffers[entry.GetCbufIndex()].address + entry.GetCbufOffset()};
-        const auto actual_addr{memory_manager.Read<u64>(addr)};
+        const auto gpu_addr{memory_manager.Read<u64>(addr)};
         const auto size{memory_manager.Read<u32>(addr + 8)};
-
+        SetupGlobalMemory(entry, gpu_addr, size);
-        const auto [ssbo, buffer_offset] =
-            buffer_cache.UploadMemory(actual_addr, size, alignment, true, entry.IsWritten());
-        bind_ssbo_pushbuffer.Push(ssbo, buffer_offset, static_cast<GLsizeiptr>(size));
     }
 }
 
+void RasterizerOpenGL::SetupComputeGlobalMemory(const Shader& kernel) {
+    auto& gpu{system.GPU()};
+    auto& memory_manager{gpu.MemoryManager()};
+    const auto cbufs{gpu.KeplerCompute().launch_description.const_buffer_config};
+    for (const auto& entry : kernel->GetShaderEntries().global_memory_entries) {
+        const auto addr{cbufs[entry.GetCbufIndex()].Address() + entry.GetCbufOffset()};
+        const auto gpu_addr{memory_manager.Read<u64>(addr)};
+        const auto size{memory_manager.Read<u32>(addr + 8)};
+        SetupGlobalMemory(entry, gpu_addr, size);
+    }
+}
+
+void RasterizerOpenGL::SetupGlobalMemory(const GLShader::GlobalMemoryEntry& entry,
+                                         GPUVAddr gpu_addr, std::size_t size) {
+    const auto alignment{device.GetShaderStorageBufferAlignment()};
+    const auto [ssbo, buffer_offset] =
+        buffer_cache.UploadMemory(gpu_addr, size, alignment, true, entry.IsWritten());
+    bind_ssbo_pushbuffer.Push(ssbo, buffer_offset, static_cast<GLsizeiptr>(size));
+}
+
 TextureBufferUsage RasterizerOpenGL::SetupTextures(Maxwell::ShaderStage stage, const Shader& shader,
                                                    BaseBindings base_bindings) {
     MICROPROFILE_SCOPE(OpenGL_Texture);

src/video_core/renderer_opengl/gl_rasterizer.h

@@ -58,6 +58,7 @@ public:
 
     void DrawArrays() override;
     void Clear() override;
+    void DispatchCompute(GPUVAddr code_addr) override;
     void FlushAll() override;
     void FlushRegion(CacheAddr addr, u64 size) override;
     void InvalidateRegion(CacheAddr addr, u64 size) override;
@@ -115,14 +116,24 @@ private:
     void SetupDrawConstBuffers(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
                                const Shader& shader);
 
+    /// Configures the current constbuffers to use for the kernel invocation.
+    void SetupComputeConstBuffers(const Shader& kernel);
+
     /// Configures a constant buffer.
     void SetupConstBuffer(const Tegra::Engines::ConstBufferInfo& buffer,
                           const GLShader::ConstBufferEntry& entry);
 
     /// Configures the current global memory entries to use for the draw command.
-    void SetupGlobalRegions(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
+    void SetupDrawGlobalMemory(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,
                                const Shader& shader);
 
+    /// Configures the current global memory entries to use for the kernel invocation.
+    void SetupComputeGlobalMemory(const Shader& kernel);
+
+    /// Configures a constant buffer.
+    void SetupGlobalMemory(const GLShader::GlobalMemoryEntry& entry, GPUVAddr gpu_addr,
+                           std::size_t size);
+
     /// Configures the current textures to use for the draw command. Returns shaders texture buffer
     /// usage.
     TextureBufferUsage SetupTextures(Tegra::Engines::Maxwell3D::Regs::ShaderStage stage,

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -23,13 +23,13 @@ namespace OpenGL {
 
 using VideoCommon::Shader::ProgramCode;
 
-// One UBO is always reserved for emulation values
+// One UBO is always reserved for emulation values on staged shaders
-constexpr u32 RESERVED_UBOS = 1;
+constexpr u32 STAGE_RESERVED_UBOS = 1;
 
 struct UnspecializedShader {
     std::string code;
     GLShader::ShaderEntries entries;
-    Maxwell::ShaderProgram program_type;
+    ProgramType program_type;
 };
 
 namespace {
@@ -55,15 +55,17 @@ ProgramCode GetShaderCode(Tegra::MemoryManager& memory_manager, const GPUVAddr g
 }
 
 /// Gets the shader type from a Maxwell program type
-constexpr GLenum GetShaderType(Maxwell::ShaderProgram program_type) {
+constexpr GLenum GetShaderType(ProgramType program_type) {
     switch (program_type) {
-    case Maxwell::ShaderProgram::VertexA:
+    case ProgramType::VertexA:
-    case Maxwell::ShaderProgram::VertexB:
+    case ProgramType::VertexB:
         return GL_VERTEX_SHADER;
-    case Maxwell::ShaderProgram::Geometry:
+    case ProgramType::Geometry:
         return GL_GEOMETRY_SHADER;
-    case Maxwell::ShaderProgram::Fragment:
+    case ProgramType::Fragment:
         return GL_FRAGMENT_SHADER;
+    case ProgramType::Compute:
+        return GL_COMPUTE_SHADER;
     default:
         return GL_NONE;
     }
@@ -100,6 +102,25 @@ constexpr std::tuple<const char*, const char*, u32> GetPrimitiveDescription(GLen
     }
 }
 
+ProgramType GetProgramType(Maxwell::ShaderProgram program) {
+    switch (program) {
+    case Maxwell::ShaderProgram::VertexA:
+        return ProgramType::VertexA;
+    case Maxwell::ShaderProgram::VertexB:
+        return ProgramType::VertexB;
+    case Maxwell::ShaderProgram::TesselationControl:
+        return ProgramType::TessellationControl;
+    case Maxwell::ShaderProgram::TesselationEval:
+        return ProgramType::TessellationEval;
+    case Maxwell::ShaderProgram::Geometry:
+        return ProgramType::Geometry;
+    case Maxwell::ShaderProgram::Fragment:
+        return ProgramType::Fragment;
+    }
+    UNREACHABLE();
+    return {};
+}
+
 /// Calculates the size of a program stream
 std::size_t CalculateProgramSize(const GLShader::ProgramCode& program) {
     constexpr std::size_t start_offset = 10;
@@ -128,13 +149,13 @@ std::size_t CalculateProgramSize(const GLShader::ProgramCode& program) {
 }
 
 /// Hashes one (or two) program streams
-u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode& code,
+u64 GetUniqueIdentifier(ProgramType program_type, const ProgramCode& code,
                         const ProgramCode& code_b, std::size_t size_a = 0, std::size_t size_b = 0) {
     if (size_a == 0) {
         size_a = CalculateProgramSize(code);
     }
     u64 unique_identifier = Common::CityHash64(reinterpret_cast<const char*>(code.data()), size_a);
-    if (program_type != Maxwell::ShaderProgram::VertexA) {
+    if (program_type != ProgramType::VertexA) {
         return unique_identifier;
     }
     // VertexA programs include two programs
@@ -152,12 +173,12 @@ u64 GetUniqueIdentifier(Maxwell::ShaderProgram program_type, const ProgramCode&
 }
 
 /// Creates an unspecialized program from code streams
-GLShader::ProgramResult CreateProgram(const Device& device, Maxwell::ShaderProgram program_type,
+GLShader::ProgramResult CreateProgram(const Device& device, ProgramType program_type,
                                       ProgramCode program_code, ProgramCode program_code_b) {
     GLShader::ShaderSetup setup(program_code);
     setup.program.size_a = CalculateProgramSize(program_code);
     setup.program.size_b = 0;
-    if (program_type == Maxwell::ShaderProgram::VertexA) {
+    if (program_type == ProgramType::VertexA) {
         // VertexB is always enabled, so when VertexA is enabled, we have two vertex shaders.
         // Conventional HW does not support this, so we combine VertexA and VertexB into one
         // stage here.
@@ -168,22 +189,23 @@ GLShader::ProgramResult CreateProgram(const Device& device, Maxwell::ShaderProgr
         program_type, program_code, program_code_b, setup.program.size_a, setup.program.size_b);
 
     switch (program_type) {
-    case Maxwell::ShaderProgram::VertexA:
+    case ProgramType::VertexA:
-    case Maxwell::ShaderProgram::VertexB:
+    case ProgramType::VertexB:
         return GLShader::GenerateVertexShader(device, setup);
-    case Maxwell::ShaderProgram::Geometry:
+    case ProgramType::Geometry:
         return GLShader::GenerateGeometryShader(device, setup);
-    case Maxwell::ShaderProgram::Fragment:
+    case ProgramType::Fragment:
         return GLShader::GenerateFragmentShader(device, setup);
+    case ProgramType::Compute:
+        return GLShader::GenerateComputeShader(device, setup);
     default:
-        LOG_CRITICAL(HW_GPU, "Unimplemented program_type={}", static_cast<u32>(program_type));
+        UNIMPLEMENTED_MSG("Unimplemented program_type={}", static_cast<u32>(program_type));
-        UNREACHABLE();
         return {};
     }
 }
 
 CachedProgram SpecializeShader(const std::string& code, const GLShader::ShaderEntries& entries,
-                               Maxwell::ShaderProgram program_type, const ProgramVariant& variant,
+                               ProgramType program_type, const ProgramVariant& variant,
                                bool hint_retrievable = false) {
     auto base_bindings{variant.base_bindings};
     const auto primitive_mode{variant.primitive_mode};
@@ -194,7 +216,14 @@ CachedProgram SpecializeShader(const std::string& code, const GLShader::ShaderEn
     if (entries.shader_viewport_layer_array) {
         source += "#extension GL_ARB_shader_viewport_layer_array : enable\n";
     }
-    source += fmt::format("\n#define EMULATION_UBO_BINDING {}\n", base_bindings.cbuf++);
+    if (program_type == ProgramType::Compute) {
+        source += "#extension GL_ARB_compute_variable_group_size : require\n";
+    }
+    source += '\n';
+
+    if (program_type != ProgramType::Compute) {
+        source += fmt::format("#define EMULATION_UBO_BINDING {}\n", base_bindings.cbuf++);
+    }
 
     for (const auto& cbuf : entries.const_buffers) {
         source +=
@@ -221,13 +250,16 @@ CachedProgram SpecializeShader(const std::string& code, const GLShader::ShaderEn
         source += fmt::format("#define SAMPLER_{}_IS_BUFFER", i);
     }
 
-    if (program_type == Maxwell::ShaderProgram::Geometry) {
+    if (program_type == ProgramType::Geometry) {
         const auto [glsl_topology, debug_name, max_vertices] =
             GetPrimitiveDescription(primitive_mode);
 
         source += "layout (" + std::string(glsl_topology) + ") in;\n";
         source += "#define MAX_VERTEX_INPUT " + std::to_string(max_vertices) + '\n';
     }
+    if (program_type == ProgramType::Compute) {
+        source += "layout (local_size_variable) in;\n";
+    }
 
     source += code;
 
@@ -255,7 +287,7 @@ std::set<GLenum> GetSupportedFormats() {
 
 } // Anonymous namespace
 
-CachedShader::CachedShader(const ShaderParameters& params, Maxwell::ShaderProgram program_type,
+CachedShader::CachedShader(const ShaderParameters& params, ProgramType program_type,
                            GLShader::ProgramResult result)
     : RasterizerCacheObject{params.host_ptr}, host_ptr{params.host_ptr}, cpu_addr{params.cpu_addr},
       unique_identifier{params.unique_identifier}, program_type{program_type},
@@ -268,29 +300,50 @@ Shader CachedShader::CreateStageFromMemory(const ShaderParameters& params,
                                            ProgramCode&& program_code_b) {
     const auto code_size{CalculateProgramSize(program_code)};
     const auto code_size_b{CalculateProgramSize(program_code_b)};
-    auto result{CreateProgram(params.device, program_type, program_code, program_code_b)};
+    auto result{
+        CreateProgram(params.device, GetProgramType(program_type), program_code, program_code_b)};
     if (result.first.empty()) {
         // TODO(Rodrigo): Unimplemented shader stages hit here, avoid using these for now
         return {};
     }
 
     params.disk_cache.SaveRaw(ShaderDiskCacheRaw(
-        params.unique_identifier, program_type, static_cast<u32>(code_size / sizeof(u64)),
+        params.unique_identifier, GetProgramType(program_type),
-        static_cast<u32>(code_size_b / sizeof(u64)), std::move(program_code),
+        static_cast<u32>(code_size / sizeof(u64)), static_cast<u32>(code_size_b / sizeof(u64)),
-        std::move(program_code_b)));
+        std::move(program_code), std::move(program_code_b)));
 
-    return std::shared_ptr<CachedShader>(new CachedShader(params, program_type, std::move(result)));
+    return std::shared_ptr<CachedShader>(
+        new CachedShader(params, GetProgramType(program_type), std::move(result)));
 }
 
 Shader CachedShader::CreateStageFromCache(const ShaderParameters& params,
                                           Maxwell::ShaderProgram program_type,
                                           GLShader::ProgramResult result) {
-    return std::shared_ptr<CachedShader>(new CachedShader(params, program_type, std::move(result)));
+    return std::shared_ptr<CachedShader>(
+        new CachedShader(params, GetProgramType(program_type), std::move(result)));
+}
+
+Shader CachedShader::CreateKernelFromMemory(const ShaderParameters& params, ProgramCode&& code) {
+    auto result{CreateProgram(params.device, ProgramType::Compute, code, {})};
+
+    const auto code_size{CalculateProgramSize(code)};
+    params.disk_cache.SaveRaw(ShaderDiskCacheRaw(params.unique_identifier, ProgramType::Compute,
+                                                 static_cast<u32>(code_size / sizeof(u64)), 0,
+                                                 std::move(code), {}));
+
+    return std::shared_ptr<CachedShader>(
+        new CachedShader(params, ProgramType::Compute, std::move(result)));
+}
+
+Shader CachedShader::CreateKernelFromCache(const ShaderParameters& params,
+                                           GLShader::ProgramResult result) {
+    return std::shared_ptr<CachedShader>(
+        new CachedShader(params, ProgramType::Compute, std::move(result)));
 }
 
 std::tuple<GLuint, BaseBindings> CachedShader::GetProgramHandle(const ProgramVariant& variant) {
     GLuint handle{};
-    if (program_type == Maxwell::ShaderProgram::Geometry) {
+    if (program_type == ProgramType::Geometry) {
         handle = GetGeometryShader(variant);
     } else {
         const auto [entry, is_cache_miss] = programs.try_emplace(variant);
@@ -308,8 +361,11 @@ std::tuple<GLuint, BaseBindings> CachedShader::GetProgramHandle(const ProgramVar
         handle = program->handle;
     }
 
-    auto base_bindings{variant.base_bindings};
+    auto base_bindings = variant.base_bindings;
-    base_bindings.cbuf += static_cast<u32>(entries.const_buffers.size()) + RESERVED_UBOS;
+    base_bindings.cbuf += static_cast<u32>(entries.const_buffers.size());
+    if (program_type != ProgramType::Compute) {
+        base_bindings.cbuf += STAGE_RESERVED_UBOS;
+    }
     base_bindings.gmem += static_cast<u32>(entries.global_memory_entries.size());
     base_bindings.sampler += static_cast<u32>(entries.samplers.size());
 
@@ -589,13 +645,15 @@ Shader ShaderCacheOpenGL::GetStageProgram(Maxwell::ShaderProgram program) {
     // No shader found - create a new one
     ProgramCode program_code{GetShaderCode(memory_manager, program_addr, host_ptr)};
     ProgramCode program_code_b;
-    if (program == Maxwell::ShaderProgram::VertexA) {
+    const bool is_program_a{program == Maxwell::ShaderProgram::VertexA};
+    if (is_program_a) {
         const GPUVAddr program_addr_b{GetShaderAddress(system, Maxwell::ShaderProgram::VertexB)};
         program_code_b = GetShaderCode(memory_manager, program_addr_b,
                                        memory_manager.GetPointer(program_addr_b));
     }
 
-    const auto unique_identifier = GetUniqueIdentifier(program, program_code, program_code_b);
+    const auto unique_identifier =
+        GetUniqueIdentifier(GetProgramType(program), program_code, program_code_b);
     const auto cpu_addr{*memory_manager.GpuToCpuAddress(program_addr)};
     const ShaderParameters params{disk_cache, precompiled_programs, device, cpu_addr,
                                   host_ptr,   unique_identifier};
@@ -612,4 +670,30 @@ Shader ShaderCacheOpenGL::GetStageProgram(Maxwell::ShaderProgram program) {
     return last_shaders[static_cast<std::size_t>(program)] = shader;
 }
 
+Shader ShaderCacheOpenGL::GetComputeKernel(GPUVAddr code_addr) {
+    auto& memory_manager{system.GPU().MemoryManager()};
+    const auto host_ptr{memory_manager.GetPointer(code_addr)};
+    auto kernel = TryGet(host_ptr);
+    if (kernel) {
+        return kernel;
+    }
+
+    // No kernel found - create a new one
+    auto code{GetShaderCode(memory_manager, code_addr, host_ptr)};
+    const auto unique_identifier{GetUniqueIdentifier(ProgramType::Compute, code, {})};
+    const auto cpu_addr{*memory_manager.GpuToCpuAddress(code_addr)};
+    const ShaderParameters params{disk_cache, precompiled_programs, device, cpu_addr,
+                                  host_ptr,   unique_identifier};
+
+    const auto found = precompiled_shaders.find(unique_identifier);
+    if (found == precompiled_shaders.end()) {
+        kernel = CachedShader::CreateKernelFromMemory(params, std::move(code));
+    } else {
+        kernel = CachedShader::CreateKernelFromCache(params, found->second);
+    }
+
+    Register(kernel);
+    return kernel;
+}
+
 } // namespace OpenGL

src/video_core/renderer_opengl/gl_shader_cache.h

@@ -61,6 +61,11 @@ public:
                                        Maxwell::ShaderProgram program_type,
                                        GLShader::ProgramResult result);
 
+    static Shader CreateKernelFromMemory(const ShaderParameters& params, ProgramCode&& code);
+
+    static Shader CreateKernelFromCache(const ShaderParameters& params,
+                                        GLShader::ProgramResult result);
+
     VAddr GetCpuAddr() const override {
         return cpu_addr;
     }
@@ -78,7 +83,7 @@ public:
     std::tuple<GLuint, BaseBindings> GetProgramHandle(const ProgramVariant& variant);
 
 private:
-    explicit CachedShader(const ShaderParameters& params, Maxwell::ShaderProgram program_type,
+    explicit CachedShader(const ShaderParameters& params, ProgramType program_type,
                           GLShader::ProgramResult result);
 
     // Geometry programs. These are needed because GLSL needs an input topology but it's not
@@ -104,7 +109,7 @@ private:
     u8* host_ptr{};
     VAddr cpu_addr{};
     u64 unique_identifier{};
-    Maxwell::ShaderProgram program_type{};
+    ProgramType program_type{};
     ShaderDiskCacheOpenGL& disk_cache;
     const PrecompiledPrograms& precompiled_programs;
 
@@ -132,6 +137,9 @@ public:
     /// Gets the current specified shader stage program
     Shader GetStageProgram(Maxwell::ShaderProgram program);
 
+    /// Gets a compute kernel in the passed address
+    Shader GetComputeKernel(GPUVAddr code_addr);
+
 protected:
     // We do not have to flush this cache as things in it are never modified by us.
     void FlushObjectInner(const Shader& object) override {}

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -37,7 +37,6 @@ using namespace std::string_literals;
 using namespace VideoCommon::Shader;
 
 using Maxwell = Tegra::Engines::Maxwell3D::Regs;
-using ShaderStage = Tegra::Engines::Maxwell3D::Regs::ShaderStage;
 using Operation = const OperationNode&;
 
 enum class Type { Bool, Bool2, Float, Int, Uint, HalfFloat };
@@ -162,9 +161,13 @@ std::string FlowStackTopName(MetaStackClass stack) {
     return fmt::format("{}_flow_stack_top", GetFlowStackPrefix(stack));
 }
 
+constexpr bool IsVertexShader(ProgramType stage) {
+    return stage == ProgramType::VertexA || stage == ProgramType::VertexB;
+}
+
 class GLSLDecompiler final {
 public:
-    explicit GLSLDecompiler(const Device& device, const ShaderIR& ir, ShaderStage stage,
+    explicit GLSLDecompiler(const Device& device, const ShaderIR& ir, ProgramType stage,
                             std::string suffix)
         : device{device}, ir{ir}, stage{stage}, suffix{suffix}, header{ir.GetHeader()} {}
 
@@ -248,21 +251,21 @@ public:
         }
         entries.clip_distances = ir.GetClipDistances();
         entries.shader_viewport_layer_array =
-            stage == ShaderStage::Vertex && (ir.UsesLayer() || ir.UsesViewportIndex());
+            IsVertexShader(stage) && (ir.UsesLayer() || ir.UsesViewportIndex());
         entries.shader_length = ir.GetLength();
         return entries;
     }
 
 private:
     void DeclareVertex() {
-        if (stage != ShaderStage::Vertex)
+        if (!IsVertexShader(stage))
             return;
 
         DeclareVertexRedeclarations();
     }
 
     void DeclareGeometry() {
-        if (stage != ShaderStage::Geometry) {
+        if (stage != ProgramType::Geometry) {
             return;
         }
 
@@ -293,14 +296,14 @@ private:
                 break;
             }
         }
-        if (stage != ShaderStage::Vertex || device.HasVertexViewportLayer()) {
+        if (!IsVertexShader(stage) || device.HasVertexViewportLayer()) {
             if (ir.UsesLayer()) {
                 code.AddLine("int gl_Layer;");
             }
             if (ir.UsesViewportIndex()) {
                 code.AddLine("int gl_ViewportIndex;");
             }
-        } else if ((ir.UsesLayer() || ir.UsesViewportIndex()) && stage == ShaderStage::Vertex &&
+        } else if ((ir.UsesLayer() || ir.UsesViewportIndex()) && IsVertexShader(stage) &&
                    !device.HasVertexViewportLayer()) {
             LOG_ERROR(
                 Render_OpenGL,
@@ -337,12 +340,17 @@ private:
     }
 
     void DeclareLocalMemory() {
-        if (const u64 local_memory_size = header.GetLocalMemorySize(); local_memory_size > 0) {
+        // TODO(Rodrigo): Unstub kernel local memory size and pass it from a register at
+        // specialization time.
+        const u64 local_memory_size =
+            stage == ProgramType::Compute ? 0x400 : header.GetLocalMemorySize();
+        if (local_memory_size == 0) {
+            return;
+        }
         const auto element_count = Common::AlignUp(local_memory_size, 4) / 4;
         code.AddLine("float {}[{}];", GetLocalMemory(), element_count);
         code.AddNewLine();
     }
-    }
 
     void DeclareInternalFlags() {
         for (u32 flag = 0; flag < static_cast<u32>(InternalFlag::Amount); flag++) {
@@ -395,12 +403,12 @@ private:
         const u32 location{GetGenericAttributeIndex(index)};
 
         std::string name{GetInputAttribute(index)};
-        if (stage == ShaderStage::Geometry) {
+        if (stage == ProgramType::Geometry) {
             name = "gs_" + name + "[]";
         }
 
         std::string suffix;
-        if (stage == ShaderStage::Fragment) {
+        if (stage == ProgramType::Fragment) {
             const auto input_mode{header.ps.GetAttributeUse(location)};
             if (skip_unused && input_mode == AttributeUse::Unused) {
                 return;
@@ -412,7 +420,7 @@ private:
     }
 
     void DeclareOutputAttributes() {
-        if (ir.HasPhysicalAttributes() && stage != ShaderStage::Fragment) {
+        if (ir.HasPhysicalAttributes() && stage != ProgramType::Fragment) {
             for (u32 i = 0; i < GetNumPhysicalVaryings(); ++i) {
                 DeclareOutputAttribute(ToGenericAttribute(i));
             }
@@ -534,7 +542,7 @@ private:
                 constexpr u32 element_stride{4};
                 const u32 address{generic_base + index * generic_stride + element * element_stride};
 
-                const bool declared{stage != ShaderStage::Fragment ||
+                const bool declared{stage != ProgramType::Fragment ||
                                     header.ps.GetAttributeUse(index) != AttributeUse::Unused};
                 const std::string value{declared ? ReadAttribute(attribute, element) : "0"};
                 code.AddLine("case 0x{:x}: return {};", address, value);
@@ -638,7 +646,7 @@ private:
         }
 
         if (const auto abuf = std::get_if<AbufNode>(&*node)) {
-            UNIMPLEMENTED_IF_MSG(abuf->IsPhysicalBuffer() && stage == ShaderStage::Geometry,
+            UNIMPLEMENTED_IF_MSG(abuf->IsPhysicalBuffer() && stage == ProgramType::Geometry,
                                  "Physical attributes in geometry shaders are not implemented");
             if (abuf->IsPhysicalBuffer()) {
                 return fmt::format("readPhysicalAttribute(ftou({}))",
@@ -693,6 +701,9 @@ private:
         }
 
         if (const auto lmem = std::get_if<LmemNode>(&*node)) {
+            if (stage == ProgramType::Compute) {
+                LOG_WARNING(Render_OpenGL, "Local memory is stubbed on compute shaders");
+            }
             return fmt::format("{}[ftou({}) / 4]", GetLocalMemory(), Visit(lmem->GetAddress()));
         }
 
@@ -722,7 +733,7 @@ private:
 
     std::string ReadAttribute(Attribute::Index attribute, u32 element, const Node& buffer = {}) {
         const auto GeometryPass = [&](std::string_view name) {
-            if (stage == ShaderStage::Geometry && buffer) {
+            if (stage == ProgramType::Geometry && buffer) {
                 // TODO(Rodrigo): Guard geometry inputs against out of bound reads. Some games
                 // set an 0x80000000 index for those and the shader fails to build. Find out why
                 // this happens and what's its intent.
@@ -734,10 +745,10 @@ private:
         switch (attribute) {
         case Attribute::Index::Position:
             switch (stage) {
-            case ShaderStage::Geometry:
+            case ProgramType::Geometry:
                 return fmt::format("gl_in[ftou({})].gl_Position{}", Visit(buffer),
                                    GetSwizzle(element));
-            case ShaderStage::Fragment:
+            case ProgramType::Fragment:
                 return element == 3 ? "1.0f" : ("gl_FragCoord"s + GetSwizzle(element));
             default:
                 UNREACHABLE();
@@ -758,7 +769,7 @@ private:
             // 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);
+            ASSERT(IsVertexShader(stage));
             switch (element) {
             case 2:
                 // Config pack's first value is instance_id.
@@ -770,7 +781,7 @@ private:
             return "0";
         case Attribute::Index::FrontFacing:
             // TODO(Subv): Find out what the values are for the other elements.
-            ASSERT(stage == ShaderStage::Fragment);
+            ASSERT(stage == ProgramType::Fragment);
             switch (element) {
             case 3:
                 return "itof(gl_FrontFacing ? -1 : 0)";
@@ -792,7 +803,7 @@ private:
             return value;
         }
         // There's a bug in NVidia's proprietary drivers that makes precise fail on fragment shaders
-        const std::string precise = stage != ShaderStage::Fragment ? "precise " : "";
+        const std::string precise = stage != ProgramType::Fragment ? "precise " : "";
 
         const std::string temporary = code.GenerateTemporary();
         code.AddLine("{}float {} = {};", precise, temporary, value);
@@ -827,12 +838,12 @@ private:
                 UNIMPLEMENTED();
                 return {};
             case 1:
-                if (stage == ShaderStage::Vertex && !device.HasVertexViewportLayer()) {
+                if (IsVertexShader(stage) && !device.HasVertexViewportLayer()) {
                     return {};
                 }
                 return std::make_pair("gl_Layer", true);
             case 2:
-                if (stage == ShaderStage::Vertex && !device.HasVertexViewportLayer()) {
+                if (IsVertexShader(stage) && !device.HasVertexViewportLayer()) {
                     return {};
                 }
                 return std::make_pair("gl_ViewportIndex", true);
@@ -1069,6 +1080,9 @@ private:
             target = result->first;
             is_integer = result->second;
         } else if (const auto lmem = std::get_if<LmemNode>(&*dest)) {
+            if (stage == ProgramType::Compute) {
+                LOG_WARNING(Render_OpenGL, "Local memory is stubbed on compute shaders");
+            }
             target = fmt::format("{}[ftou({}) / 4]", GetLocalMemory(), Visit(lmem->GetAddress()));
         } else if (const auto gmem = std::get_if<GmemNode>(&*dest)) {
             const std::string real = Visit(gmem->GetRealAddress());
@@ -1622,7 +1636,7 @@ private:
     }
 
     std::string Exit(Operation operation) {
-        if (stage != ShaderStage::Fragment) {
+        if (stage != ProgramType::Fragment) {
             code.AddLine("return;");
             return {};
         }
@@ -1673,7 +1687,7 @@ private:
     }
 
     std::string EmitVertex(Operation operation) {
-        ASSERT_MSG(stage == ShaderStage::Geometry,
+        ASSERT_MSG(stage == ProgramType::Geometry,
                    "EmitVertex is expected to be used in a geometry shader.");
 
         // If a geometry shader is attached, it will always flip (it's the last stage before
@@ -1684,7 +1698,7 @@ private:
     }
 
     std::string EndPrimitive(Operation operation) {
-        ASSERT_MSG(stage == ShaderStage::Geometry,
+        ASSERT_MSG(stage == ProgramType::Geometry,
                    "EndPrimitive is expected to be used in a geometry shader.");
 
         code.AddLine("EndPrimitive();");
@@ -1919,7 +1933,7 @@ private:
     }
 
     u32 GetNumPhysicalInputAttributes() const {
-        return stage == ShaderStage::Vertex ? GetNumPhysicalAttributes() : GetNumPhysicalVaryings();
+        return IsVertexShader(stage) ? GetNumPhysicalAttributes() : GetNumPhysicalVaryings();
     }
 
     u32 GetNumPhysicalAttributes() const {
@@ -1932,7 +1946,7 @@ private:
 
     const Device& device;
     const ShaderIR& ir;
-    const ShaderStage stage;
+    const ProgramType stage;
     const std::string suffix;
     const Header header;
 
@@ -1963,7 +1977,7 @@ std::string GetCommonDeclarations() {
         MAX_CONSTBUFFER_ELEMENTS);
 }
 
-ProgramResult Decompile(const Device& device, const ShaderIR& ir, Maxwell::ShaderStage stage,
+ProgramResult Decompile(const Device& device, const ShaderIR& ir, ProgramType stage,
                         const std::string& suffix) {
     GLSLDecompiler decompiler(device, ir, stage, suffix);
     decompiler.Decompile();

src/video_core/renderer_opengl/gl_shader_decompiler.h

@@ -12,14 +12,26 @@
 #include "video_core/engines/maxwell_3d.h"
 #include "video_core/shader/shader_ir.h"
 
-namespace OpenGL {
-class Device;
-}
-
 namespace VideoCommon::Shader {
 class ShaderIR;
 }
 
+namespace OpenGL {
+
+class Device;
+
+enum class ProgramType : u32 {
+    VertexA = 0,
+    VertexB = 1,
+    TessellationControl = 2,
+    TessellationEval = 3,
+    Geometry = 4,
+    Fragment = 5,
+    Compute = 6
+};
+
+} // namespace OpenGL
+
 namespace OpenGL::GLShader {
 
 struct ShaderEntries;
@@ -85,6 +97,6 @@ struct ShaderEntries {
 std::string GetCommonDeclarations();
 
 ProgramResult Decompile(const Device& device, const VideoCommon::Shader::ShaderIR& ir,
-                        Maxwell::ShaderStage stage, const std::string& suffix);
+                        ProgramType stage, const std::string& suffix);
 
 } // namespace OpenGL::GLShader

src/video_core/renderer_opengl/gl_shader_disk_cache.cpp

@@ -51,7 +51,7 @@ ShaderCacheVersionHash GetShaderCacheVersionHash() {
 
 } // namespace
 
-ShaderDiskCacheRaw::ShaderDiskCacheRaw(u64 unique_identifier, Maxwell::ShaderProgram program_type,
+ShaderDiskCacheRaw::ShaderDiskCacheRaw(u64 unique_identifier, ProgramType program_type,
                                        u32 program_code_size, u32 program_code_size_b,
                                        ProgramCode program_code, ProgramCode program_code_b)
     : unique_identifier{unique_identifier}, program_type{program_type},

src/video_core/renderer_opengl/gl_shader_disk_cache.h

@@ -18,7 +18,6 @@
 #include "common/assert.h"
 #include "common/common_types.h"
 #include "core/file_sys/vfs_vector.h"
-#include "video_core/engines/maxwell_3d.h"
 #include "video_core/renderer_opengl/gl_shader_gen.h"
 
 namespace Core {
@@ -34,14 +33,11 @@ namespace OpenGL {
 struct ShaderDiskCacheUsage;
 struct ShaderDiskCacheDump;
 
-using ShaderDumpsMap = std::unordered_map<ShaderDiskCacheUsage, ShaderDiskCacheDump>;
-
 using ProgramCode = std::vector<u64>;
-using Maxwell = Tegra::Engines::Maxwell3D::Regs;
+using ShaderDumpsMap = std::unordered_map<ShaderDiskCacheUsage, ShaderDiskCacheDump>;
-
 using TextureBufferUsage = std::bitset<64>;
 
-/// Allocated bindings used by an OpenGL shader program.
+/// Allocated bindings used by an OpenGL shader program
 struct BaseBindings {
     u32 cbuf{};
     u32 gmem{};
@@ -126,7 +122,7 @@ namespace OpenGL {
 /// Describes a shader how it's used by the guest GPU
 class ShaderDiskCacheRaw {
 public:
-    explicit ShaderDiskCacheRaw(u64 unique_identifier, Maxwell::ShaderProgram program_type,
+    explicit ShaderDiskCacheRaw(u64 unique_identifier, ProgramType program_type,
                                 u32 program_code_size, u32 program_code_size_b,
                                 ProgramCode program_code, ProgramCode program_code_b);
     ShaderDiskCacheRaw();
@@ -141,30 +137,13 @@ public:
     }
 
     bool HasProgramA() const {
-        return program_type == Maxwell::ShaderProgram::VertexA;
+        return program_type == ProgramType::VertexA;
     }
 
-    Maxwell::ShaderProgram GetProgramType() const {
+    ProgramType GetProgramType() const {
         return program_type;
     }
 
-    Maxwell::ShaderStage GetProgramStage() const {
-        switch (program_type) {
-        case Maxwell::ShaderProgram::VertexA:
-        case Maxwell::ShaderProgram::VertexB:
-            return Maxwell::ShaderStage::Vertex;
-        case Maxwell::ShaderProgram::TesselationControl:
-            return Maxwell::ShaderStage::TesselationControl;
-        case Maxwell::ShaderProgram::TesselationEval:
-            return Maxwell::ShaderStage::TesselationEval;
-        case Maxwell::ShaderProgram::Geometry:
-            return Maxwell::ShaderStage::Geometry;
-        case Maxwell::ShaderProgram::Fragment:
-            return Maxwell::ShaderStage::Fragment;
-        }
-        UNREACHABLE();
-    }
-
     const ProgramCode& GetProgramCode() const {
         return program_code;
     }
@@ -175,7 +154,7 @@ public:
 
 private:
     u64 unique_identifier{};
-    Maxwell::ShaderProgram program_type{};
+    ProgramType program_type{};
     u32 program_code_size{};
     u32 program_code_size_b{};
 

src/video_core/renderer_opengl/gl_shader_gen.cpp

@@ -14,7 +14,8 @@ using Tegra::Engines::Maxwell3D;
 using VideoCommon::Shader::ProgramCode;
 using VideoCommon::Shader::ShaderIR;
 
-static constexpr u32 PROGRAM_OFFSET{10};
+static constexpr u32 PROGRAM_OFFSET = 10;
+static constexpr u32 COMPUTE_OFFSET = 0;
 
 ProgramResult GenerateVertexShader(const Device& device, const ShaderSetup& setup) {
     const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
@@ -29,17 +30,15 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform vs_config {
 };
 
 )";
-    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
-    ProgramResult program =
-        Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Vertex, "vertex");
 
+    const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
+    const auto stage = setup.IsDualProgram() ? ProgramType::VertexA : ProgramType::VertexB;
+    ProgramResult program = Decompile(device, program_ir, stage, "vertex");
     out += program.first;
 
     if (setup.IsDualProgram()) {
         const ShaderIR program_ir_b(setup.program.code_b, PROGRAM_OFFSET, setup.program.size_b);
-        ProgramResult program_b =
+        ProgramResult program_b = Decompile(device, program_ir_b, ProgramType::VertexB, "vertex_b");
-            Decompile(device, program_ir_b, Maxwell3D::Regs::ShaderStage::Vertex, "vertex_b");
-
         out += program_b.first;
     }
 
@@ -80,9 +79,9 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform gs_config {
 };
 
 )";
+
     const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
-    ProgramResult program =
+    ProgramResult program = Decompile(device, program_ir, ProgramType::Geometry, "geometry");
-        Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Geometry, "geometry");
     out += program.first;
 
     out += R"(
@@ -116,9 +115,7 @@ layout (std140, binding = EMULATION_UBO_BINDING) uniform fs_config {
 
 )";
     const ShaderIR program_ir(setup.program.code, PROGRAM_OFFSET, setup.program.size_a);
-    ProgramResult program =
+    ProgramResult program = Decompile(device, program_ir, ProgramType::Fragment, "fragment");
-        Decompile(device, program_ir, Maxwell3D::Regs::ShaderStage::Fragment, "fragment");
-
     out += program.first;
 
     out += R"(
@@ -130,4 +127,22 @@ void main() {
     return {std::move(out), std::move(program.second)};
 }
 
+ProgramResult GenerateComputeShader(const Device& device, const ShaderSetup& setup) {
+    const std::string id = fmt::format("{:016x}", setup.program.unique_identifier);
+
+    std::string out = "// Shader Unique Id: CS" + id + "\n\n";
+    out += GetCommonDeclarations();
+
+    const ShaderIR program_ir(setup.program.code, COMPUTE_OFFSET, setup.program.size_a);
+    ProgramResult program = Decompile(device, program_ir, ProgramType::Compute, "compute");
+    out += program.first;
+
+    out += R"(
+void main() {
+    execute_compute();
+}
+)";
+    return {std::move(out), std::move(program.second)};
+}
+
 } // namespace OpenGL::GLShader

src/video_core/renderer_opengl/gl_shader_gen.h

@@ -54,4 +54,7 @@ ProgramResult GenerateGeometryShader(const Device& device, const ShaderSetup& se
 /// Generates the GLSL fragment shader program source code for the given FS program
 ProgramResult GenerateFragmentShader(const Device& device, const ShaderSetup& setup);
 
+/// Generates the GLSL compute shader program source code for the given CS program
+ProgramResult GenerateComputeShader(const Device& device, const ShaderSetup& setup);
+
 } // namespace OpenGL::GLShader

src/video_core/renderer_opengl/gl_shader_util.cpp

@@ -10,21 +10,25 @@
 
 namespace OpenGL::GLShader {
 
-GLuint LoadShader(const char* source, GLenum type) {
+namespace {
-    const char* debug_type;
+const char* GetStageDebugName(GLenum type) {
     switch (type) {
     case GL_VERTEX_SHADER:
-        debug_type = "vertex";
+        return "vertex";
-        break;
     case GL_GEOMETRY_SHADER:
-        debug_type = "geometry";
+        return "geometry";
-        break;
     case GL_FRAGMENT_SHADER:
-        debug_type = "fragment";
+        return "fragment";
-        break;
+    case GL_COMPUTE_SHADER:
-    default:
+        return "compute";
-        UNREACHABLE();
     }
+    UNIMPLEMENTED();
+    return "unknown";
+}
+} // Anonymous namespace
+
+GLuint LoadShader(const char* source, GLenum type) {
+    const char* debug_type = GetStageDebugName(type);
     const GLuint shader_id = glCreateShader(type);
     glShaderSource(shader_id, 1, &source, nullptr);
     LOG_DEBUG(Render_OpenGL, "Compiling {} shader...", debug_type);