ABT.LogicalNot.CGenValue C# (CSharp) Method

        public override Reg CGenValue(CGenState state) {
            Reg ret = this.Expr.CGenValue(state);
            switch (ret) {
                case Reg.EAX:
                    state.TESTL(Reg.EAX, Reg.EAX);
                    state.SETE(Reg.AL);
                    state.MOVZBL(Reg.AL, Reg.EAX);
                    return Reg.EAX;

                case Reg.ST0:
                    /// Compare Expr with 0.0
                    /// < see cref = "BinaryComparisonOp.OperateFloat(CGenState)" />
                    state.FLDZ();
                    state.FUCOMIP();
                    state.FSTP(Reg.ST0);
                    state.SETE(Reg.AL);
                    state.MOVZBL(Reg.AL, Reg.EAX);
                    return Reg.EAX;

                default:
                    throw new InvalidProgramException();
            }
        }
    }