glasm: Initial GLASM compute implementation for testing

src/video_core/renderer_opengl/gl_compute_program.cpp

@@ -29,11 +29,11 @@ bool ComputeProgramKey::operator==(const ComputeProgramKey& rhs) const noexcept
 ComputeProgram::ComputeProgram(TextureCache& texture_cache_, BufferCache& buffer_cache_,
                                Tegra::MemoryManager& gpu_memory_,
                                Tegra::Engines::KeplerCompute& kepler_compute_,
-                               ProgramManager& program_manager_, OGLProgram program_,
-                               const Shader::Info& info_)
+                               ProgramManager& program_manager_, const Shader::Info& info_,
+                               OGLProgram source_program_, OGLAssemblyProgram assembly_program_)
     : texture_cache{texture_cache_}, buffer_cache{buffer_cache_}, gpu_memory{gpu_memory_},
-      kepler_compute{kepler_compute_},
-      program_manager{program_manager_}, program{std::move(program_)}, info{info_} {
+      kepler_compute{kepler_compute_}, program_manager{program_manager_}, info{info_},
+      source_program{std::move(source_program_)}, assembly_program{std::move(assembly_program_)} {
     for (const auto& desc : info.texture_buffer_descriptors) {
         num_texture_buffers += desc.count;
     }
@@ -124,6 +124,14 @@ void ComputeProgram::Configure() {
     const std::span indices_span(image_view_indices.data(), image_view_indices.size());
     texture_cache.FillComputeImageViews(indices_span, image_view_ids);
 
+    if (assembly_program.handle != 0) {
+        // FIXME: State track this
+        glEnable(GL_COMPUTE_PROGRAM_NV);
+        glBindProgramARB(GL_COMPUTE_PROGRAM_NV, assembly_program.handle);
+        program_manager.BindProgram(0);
+    } else {
+        program_manager.BindProgram(source_program.handle);
+    }
     buffer_cache.UnbindComputeTextureBuffers();
     size_t texbuf_index{};
     const auto add_buffer{[&](const auto& desc) {
@@ -172,7 +180,6 @@ void ComputeProgram::Configure() {
     if (image_binding != 0) {
         glBindImageTextures(0, image_binding, images.data());
     }
-    program_manager.BindProgram(program.handle);
 }
 
 } // namespace OpenGL

src/video_core/renderer_opengl/gl_compute_program.h

@@ -52,8 +52,8 @@ public:
     explicit ComputeProgram(TextureCache& texture_cache_, BufferCache& buffer_cache_,
                             Tegra::MemoryManager& gpu_memory_,
                             Tegra::Engines::KeplerCompute& kepler_compute_,
-                            ProgramManager& program_manager_, OGLProgram program_,
-                            const Shader::Info& info_);
+                            ProgramManager& program_manager_, const Shader::Info& info_,
+                            OGLProgram source_program_, OGLAssemblyProgram assembly_program_);
 
     void Configure();
 
@@ -64,8 +64,9 @@ private:
     Tegra::Engines::KeplerCompute& kepler_compute;
     ProgramManager& program_manager;
 
-    OGLProgram program;
     Shader::Info info;
+    OGLProgram source_program;
+    OGLAssemblyProgram assembly_program;
 
     u32 num_texture_buffers{};
     u32 num_image_buffers{};

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -16,6 +16,7 @@
 #include "common/scope_exit.h"
 #include "core/core.h"
 #include "core/frontend/emu_window.h"
+#include "shader_recompiler/backend/glasm/emit_glasm.h"
 #include "shader_recompiler/backend/spirv/emit_spirv.h"
 #include "shader_recompiler/frontend/ir/program.h"
 #include "shader_recompiler/frontend/maxwell/control_flow.h"
@@ -89,6 +90,7 @@ const Shader::Profile profile{
     .xfb_varyings = {},
 };
 
+using Shader::Backend::GLASM::EmitGLASM;
 using Shader::Backend::SPIRV::EmitSPIRV;
 using Shader::Maxwell::TranslateProgram;
 using VideoCommon::ComputeEnvironment;
@@ -151,6 +153,22 @@ void LinkProgram(GLuint program) {
     }
 }
 
+OGLAssemblyProgram CompileProgram(std::string_view code, GLenum target) {
+    OGLAssemblyProgram program;
+    glGenProgramsARB(1, &program.handle);
+    glNamedProgramStringEXT(program.handle, target, GL_PROGRAM_FORMAT_ASCII_ARB,
+                            static_cast<GLsizei>(code.size()), code.data());
+    if (!Settings::values.renderer_debug) {
+        return program;
+    }
+    const auto err = reinterpret_cast<const char*>(glGetString(GL_PROGRAM_ERROR_STRING_NV));
+    if (err && *err) {
+        LOG_CRITICAL(Render_OpenGL, "{}", err);
+        LOG_INFO(Render_OpenGL, "{}", code);
+    }
+    return program;
+}
+
 GLenum Stage(size_t stage_index) {
     switch (stage_index) {
     case 0:
@@ -294,13 +312,20 @@ std::unique_ptr<ComputeProgram> ShaderCache::CreateComputeProgram(ShaderPools& p
 
     Shader::Maxwell::Flow::CFG cfg{env, pools.flow_block, env.StartAddress()};
     Shader::IR::Program program{TranslateProgram(pools.inst, pools.block, env, cfg)};
-    const std::vector<u32> code{EmitSPIRV(profile, program)};
-    OGLProgram gl_program;
-    gl_program.handle = glCreateProgram();
-    AddShader(GL_COMPUTE_SHADER, gl_program.handle, code);
-    LinkProgram(gl_program.handle);
+    OGLAssemblyProgram asm_program;
+    OGLProgram source_program;
+    if (device.UseAssemblyShaders()) {
+        const std::string code{EmitGLASM(profile, program)};
+        asm_program = CompileProgram(code, GL_COMPUTE_PROGRAM_NV);
+    } else {
+        const std::vector<u32> code{EmitSPIRV(profile, program)};
+        source_program.handle = glCreateProgram();
+        AddShader(GL_COMPUTE_SHADER, source_program.handle, code);
+        LinkProgram(source_program.handle);
+    }
     return std::make_unique<ComputeProgram>(texture_cache, buffer_cache, gpu_memory, kepler_compute,
-                                            program_manager, std::move(gl_program), program.info);
+                                            program_manager, program.info,
+                                            std::move(source_program), std::move(asm_program));
 }
 
 } // namespace OpenGL