gl_shader_decompiler: Implement TextureCube for TEX.

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -1525,6 +1525,14 @@ private:
                     coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
                     break;
                 }
+                case Tegra::Shader::TextureType::TextureCube: {
+                    std::string x = regs.GetRegisterAsFloat(instr.gpr8);
+                    std::string y = regs.GetRegisterAsFloat(instr.gpr8.Value() + 1);
+                    std::string z = regs.GetRegisterAsFloat(instr.gpr8.Value() + 2);
+                    ASSERT(instr.gpr20.Value() == Register::ZeroIndex);
+                    coord = "vec3 coords = vec3(" + x + ", " + y + ", " + z + ");";
+                    break;
+                }
                 default:
                     LOG_CRITICAL(HW_GPU, "Unhandled texture type {}",
                                  static_cast<u32>(instr.tex.texture_type.Value()));