GPU: Implemented MUFU suboperation 8, sqrt.

src/video_core/engines/shader_bytecode.h

@@ -166,6 +166,7 @@ enum class SubOp : u64 {
     Lg2 = 0x3,
     Rcp = 0x4,
     Rsq = 0x5,
+    Sqrt = 0x8,
 };
 
 enum class F2iRoundingOp : u64 {

src/video_core/renderer_opengl/gl_shader_decompiler.cpp

@@ -917,6 +917,10 @@ private:
                     regs.SetRegisterToFloat(instr.gpr0, 0, "inversesqrt(" + op_a + ')', 1, 1,
                                             instr.alu.saturate_d);
                     break;
+                case SubOp::Sqrt:
+                    regs.SetRegisterToFloat(instr.gpr0, 0, "sqrt(" + op_a + ')', 1, 1,
+                                            instr.alu.saturate_d);
+                    break;
                 default:
                     NGLOG_CRITICAL(HW_GPU, "Unhandled MUFU sub op: {0:x}",
                                    static_cast<unsigned>(instr.sub_op.Value()));