%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% register-transfer-level - a TikZ package for superior RTL diagrams
%---------------------------------------------------------------------------------
%% register-transfer-level.sty
%% Copyright (C) 2026 Lukas Rumpel 
%%
%% This work may be distributed and/or modified under the
%% conditions of the LaTeX Project Public License, either version 1.3c
%% of this license or (at your option) any later version.
%% The latest version of this license is in
%%   http://www.latex-project.org/lppl.txt
%% and version 1.3c or later is part of all distributions of LaTeX
%% version 2005/12/01 or later.
%%
%% This work has the LPPL maintenance status `maintained'.
%%
%% The Current Maintainer of this work is Lukas Rumpel. 
%%
%% This work consists of the files register-transfer-level.sty,
%% register-transfer-level.tex and the derived file register-transfer-level.pdf.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage{register-transfer-level}[2026 v1.0 Custom RTL TikZ Library]

\RequirePackage[european]{circuitikz}
\RequirePackage{graphicx}

\pgfdeclarelayer{foreground}
\pgfsetlayers{main,foreground}

\usetikzlibrary{shapes.geometric, arrows.meta, positioning, calc, shadows, decorations.markings}

\tikzset{
	rtl_width/.style={
			minimum width=#1
		},
	rtl_height/.style={
			minimum height=#1
		},
	rtl_mux_width/.style={
			minimum height=#1
		},
	rtl_mux_height/.style={
			minimum width=#1
		},
	rtl_size/.style={
			minimum size=#1
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% clocked register - pin3 = clock
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_has_clock/.style={
			path picture={
					\path (path picture bounding box.south west) coordinate (SW);
					\draw[thick, black, line join=round] ($(SW)+(0, 0.2)$) -- ($(SW)+(0.3, 0.35)$) -- ($(SW)+(0, 0.5)$);
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% clocked register - pin2 = clock
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_has_clock_middle/.style={
			path picture={
					\path (path picture bounding box.west) coordinate (W);
					\draw[thick, black, line join=round] ($(W)+(0, 0.2)$) -- ($(W)+(0.3, 0.0)$) -- ($(W)-(0, 0.2)$);
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% base box
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_base_box/.style={
			draw,
			rectangle,
			fill=blue!5,
			minimum width=1.5cm,
			minimum height=1.8cm,
			outer sep=0pt,
			drop shadow,
			font=\sffamily\large,
			align=center
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% D flip flop
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_dff/.style={
			rtl_base_box,
			minimum width=1.2cm,
			rtl_has_clock,
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					($(\regtrans@savednode.north west)!0.15!(\regtrans@savednode.south west)$) coordinate (\regtrans@savednode-D) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {D}
					($(\regtrans@savednode.south west)!0.2!(\regtrans@savednode.north west)$) coordinate (\regtrans@savednode-CLK) node[anchor=east, inner sep=0pt, xshift=2pt] {}
					($(\regtrans@savednode.north east)!0.15!(\regtrans@savednode.south east)$) coordinate (\regtrans@savednode-Q) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {Q}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% D flip flop with inverted output
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_dff_inv/.style={
			rtl_base_box,
			minimum width=1.2cm,
			rtl_has_clock,
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					($(\regtrans@savednode.north west)!0.15!(\regtrans@savednode.south west)$) coordinate (\regtrans@savednode-D) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {D}
					($(\regtrans@savednode.south west)!0.15!(\regtrans@savednode.north west)$) coordinate (\regtrans@savednode-CLK) node[anchor=east, inner sep=0pt, xshift=2pt] {}
					($(\regtrans@savednode.north east)!0.15!(\regtrans@savednode.south east)$) coordinate (\regtrans@savednode-Q) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {Q}
					($(\regtrans@savednode.south east)!0.15!(\regtrans@savednode.north east)$) coordinate (\regtrans@savednode-Qbar) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {$\mathsf{\overline{Q}}$}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% RS flip flop
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_sr_ff/.style={
			rtl_base_box,
			minimum width=1.2cm,
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					($(\regtrans@savednode.north west)!0.15!(\regtrans@savednode.south west)$) coordinate (\regtrans@savednode-S) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {S}
					($(\regtrans@savednode.south west)!0.15!(\regtrans@savednode.north west)$) coordinate (\regtrans@savednode-R) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {R}
					($(\regtrans@savednode.north east)!0.15!(\regtrans@savednode.south east)$) coordinate (\regtrans@savednode-Q) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {Q}
					($(\regtrans@savednode.south east)!0.15!(\regtrans@savednode.north east)$) coordinate (\regtrans@savednode-Qbar) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {$\mathsf{\overline{Q}}$}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% JK flip flop
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_jk_ff/.style={
			rtl_base_box,
			minimum width=1.2cm,
			rtl_has_clock_middle,
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					($(\regtrans@savednode.north west)!0.15!(\regtrans@savednode.south west)$) coordinate (\regtrans@savednode-J) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {J}
					($(\regtrans@savednode.west)$) coordinate (\regtrans@savednode-CLK) node[anchor=east, inner sep=0pt, xshift=2pt] {}
					($(\regtrans@savednode.south west)!0.15!(\regtrans@savednode.north west)$) coordinate (\regtrans@savednode-K) node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] {K}
					($(\regtrans@savednode.north east)!0.15!(\regtrans@savednode.south east)$) coordinate (\regtrans@savednode-Q) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {Q}
					($(\regtrans@savednode.south east)!0.15!(\regtrans@savednode.north east)$) coordinate (\regtrans@savednode-Qbar) node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] {$\mathsf{\overline{Q}}$}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% clocked register
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_reg_clk/.style={
			rtl_base_box,
			rtl_has_clock,
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					($(\regtrans@savednode.south west)!0.2!(\regtrans@savednode.north west)$) coordinate (\regtrans@savednode-CLK) node[anchor=east, inner sep=0pt, xshift=2pt] {}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% unclocked register
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_reg/.style={
			rtl_base_box
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% register file
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_regfile/.style={
			rtl_base_box,
			drop shadow/.style={},
			double copy shadow={
					shadow xshift=2.5pt,
					shadow yshift=2.5pt,
					fill=blue!5,
					draw=black
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% arithmetical operations
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_op/.style={
			draw, circle,
			fill=white,
			minimum size=0.8cm,
			inner sep=0pt,
			font=\sffamily\large,
			drop shadow
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% primitive MUX
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_mux/.style={
			draw, trapezium,
			trapezium angle=75,
			shape border rotate=270,
			fill=yellow!20,
			align=center,
			outer sep=0pt,
			font=\sffamily\scriptsize,
			drop shadow,
			minimum height=0.8cm,
			minimum width=2.0cm
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% primitive DEMUX
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_demux/.style={
			draw,
			trapezium,
			trapezium angle=75,
			shape border rotate=90,
			fill=yellow!20,
			align=center,
			outer sep=0pt,
			font=\sffamily\scriptsize,
			drop shadow,
			minimum height=0.8cm,
			minimum width=2.0cm
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% shifter
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_shifter/.style={
			draw,
			rectangle,
			rounded corners=2pt,
			fill=orange!15,
			minimum size=1cm,
			align=center,
			font=\bfseries,
			drop shadow,
			font=\sffamily\large
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% bus
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_bus/.style={
			line width=2,
			decoration={
					markings,
					mark=at position 0.5 with {
							\node[font=\sffamily\large, sloped, inner sep=0pt] {/};
							\node[font=\sffamily, below=2pt] {#1};
						}
				},
			postaction={decorate}
		},
	rtl_bus/.default={},
	rtl_bus_flex/.style args={#1,#2}{
			line width=2,
			decoration={
					markings,
					mark=at position {#2} with {
							\node[font=\sffamily\large, sloped, inner sep=0pt] {/};
							\node[font=\sffamily, below=2pt] {#1};
						}
				},
			postaction={decorate}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% boolean operations
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_boolean/.style={
			draw,
			rectangle,
			rounded corners=2pt,
			fill=violet!15,
			minimum size=1cm,
			align=center,
			font=\sffamily\large,
			drop shadow
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% module
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_module/.style={
			rtl_base_box,
			fill=green!5,
			font=\sffamily\large,
			label={
					[anchor=north, align=center, font=\sffamily\large, yshift=-0.1cm]north:#1
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% constants
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_const/.style={
			rtl_base_box,
			fill=purple!5
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% signal manipulation
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_sigmanip/.style={
			draw,
			ellipse,
			fill=orange!10,
			align=center,
			font=\sffamily\large,
			drop shadow,
			inner sep=2pt
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% custom MUX Creation
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	rtl_tristate/.style={
			draw,
			regular polygon,
			regular polygon sides=3,
			shape border rotate=-90,
			fill=gray!5,
			minimum size=0.8cm,
			inner sep=0pt,
			drop shadow,
			label={
					[font=\sffamily\small, inner sep=8pt, yshift=4pt, anchor=north]north:EN
				}
		},
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% cutset line
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	is_cutset/.style={
			append after command={
					\pgfextra{\edef\regtrans@savednode{\tikzlastnode}}
					\pgfextra{
						\begin{pgfonlayer}{foreground}
							\draw[#1, dashed, thick]
							($(\regtrans@savednode.north)!-0.05!(\regtrans@savednode.south)$)--
							($(\regtrans@savednode.south)!-0.05!(\regtrans@savednode.north)$);
						\end{pgfonlayer}
					}
					\pgfextra{\xdef\tikzlastnode{\regtrans@savednode}}
				}
		}
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% custom MUX creation 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Parameters:
% #1 []             : Style Arguments
% #2 {}             : Name of Node
% #3 (x,y)          : optional Coordinates
% #4 {{}, {},...}   : List of Input Labels
\NewDocumentCommand{\createMux}{ O{} m d() m }{
	\IfNoValueTF{#3}{
		\node[rtl_mux, #1] (#2) {\rotatebox{-90}{ }};
	}{
		\node[rtl_mux, #1] at (#3) (#2) {\rotatebox{-90}{ }};
	}

	\foreach \dummy [count=\n] in {#4} { \global\let\regtrans@inputcount\n }
	\foreach \lbl [count=\i] in {#4} {
			\ifnum\regtrans@inputcount=1
				\pgfmathsetmacro{\pos}{0.5}
			\else
				\pgfmathsetmacro{\pos}{(-0.1 + (\i-1) / (\regtrans@inputcount-1) ) * 1.2 }
			\fi
			\coordinate (#2-in-\i) at ($(#2.north west)!\pos!(#2.south west)$);
			\node[font=\sffamily\large, anchor=west, inner sep=0pt, xshift=2pt] at (#2-in-\i) {\lbl};
		}
	\coordinate (#2-out) at (#2.east);
	\coordinate (#2-sel) at (#2.south);
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% custom DEMUX creation
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Parameters:
% #1 []             : Style Arguments
% #2 {}             : Name of Node
% #3 (x,y)          : optional Coordinates
% #4 {{}, {},...}   : List of Output Labels
\NewDocumentCommand{\createDemux}{ O{} m d() m }{
	\IfNoValueTF{#3}{
		\node[rtl_demux, #1] (#2) {\rotatebox{90}{ }};
	}{
		\node[rtl_demux, #1] at (#3) (#2) {\rotatebox{90}{ }};
	}

	\foreach \dummy [count=\n] in {#4} { \global\let\regtrans@outputcount\n }
	\foreach \lbl [count=\i] in {#4} {
			\ifnum\regtrans@outputcount=1
				\pgfmathsetmacro{\pos}{0.5}
			\else
				\pgfmathsetmacro{\pos}{(-0.1 + (\i-1) / (\regtrans@outputcount-1) ) * 1.2 }
			\fi
			\coordinate (#2-out-\i) at ($(#2.north east)!\pos!(#2.south east)$);
			\node[font=\sffamily\large, anchor=east, inner sep=0pt, xshift=-2pt] at (#2-out-\i) {\lbl};
		}
	\coordinate (#2-in) at (#2.west);
	\coordinate (#2-sel) at (#2.south);
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Z Route
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Z-Route (Dogleg)
% #1 []             : Style Arguments
% #2 {}             : Start
% #3 {}             : Kink (x)
% #4 {}             : Destination
\NewDocumentCommand{\routeZ}{ O{} m m m }{
	\draw[#1] (#2) -- ++(#3, 0) |- (#4)
}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% feedback Route
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% U-Route (Feedback Loop)
% #1 []             : Style Arguments
% #2 {}             : Start
% #3 {}             : Inititial Space (x)
% #3 {}             : Height of Arc (y)
% #4 {}             : Destination
\NewDocumentCommand{\routeU}{ O{} m m m m }{
	\draw[#1] (#2) -- ++(#3, 0) -- ++(0, #4) -| ($(#5)-(#3, 0)$) -- (#5)
}

\endinput