CodeGeneration.CGenState.JMP C# (CSharp) Method

        public void JMP(Int32 label) => this.os.WriteLine($"    jmp .L{label}");

        public override Reg CGenValue(CGenState state) {
            Int32 label_set = state.label_idx;
            state.label_idx++;
            Int32 label_finish = state.label_idx;
            state.label_idx++;

            Reg ret = this.Left.CGenValue(state);
            switch (ret) {
                case Reg.EAX:
                    state.TESTL(Reg.EAX, Reg.EAX);
                    state.JNZ(label_set);
                    break;

                case Reg.ST0:
                    state.FLDZ();
                    state.FUCOMIP();
                    state.FSTP(Reg.ST0);
                    state.JNZ(label_set);
                    break;

                default:
                    throw new InvalidProgramException();
            }

            ret = this.Right.CGenValue(state);
            switch (ret) {
                case Reg.EAX:
                    state.TESTL(Reg.EAX, Reg.EAX);
                    state.JNZ(label_set);
                    break;

                case Reg.ST0:
                    state.FLDZ();
                    state.FUCOMIP();
                    state.FSTP(Reg.ST0);
                    state.JNZ(label_set);
                    break;

                default:
                    throw new InvalidProgramException();
            }

            state.MOVL(0, Reg.EAX);

            state.JMP(label_finish);

            state.CGenLabel(label_set);

            state.MOVL(1, Reg.EAX);

            state.CGenLabel(label_finish);

            return Reg.EAX;
        }