spec/sm/alu.tex

   1 \documentclass{minimal}
   2 \pagestyle{empty}
   3
   4 \usepackage{pstricks}
   5 \usepackage{pst-node}
   6
   7 \begin{document}
   8
   9 \begin{psmatrix}[mnode=oval, colsep=3cm, rowsep=3cm]
  10 [name=add]{\shortstack{\textbf{ADD}}} & &
  11 [name=sub]{\shortstack{\textbf{SUB}}} \\
  12 %
  13 [mnode=R,name=res]{sys\_res\_n} &
  14 [name=idle]{\shortstack{\textbf{idle}}}\\
  15 %
  16 [name=mul]{\shortstack{\textbf{MUL}}} & &
  17 [name=div]{\shortstack{\textbf{DIV}}} \\
  18 \end{psmatrix}
  19
  20 \psset{arrows=->, shortput=nab}
  21
  22 \ncline[linestyle=dotted]{res}{idle}
  23
  24 \ncarc[arcangle=20]{idle}{add}\ncput*[npos=.50]{\shortstack{do\_calc$\uparrow$ \emph{\textbf{and}}\\opc = ADD}}
  25 \ncarc[arcangle=20]{add}{idle}
  26
  27 \ncarc[arcangle=20]{idle}{sub}\ncput*[npos=.50]{\shortstack{do\_calc$\uparrow$ \emph{\textbf{and}}\\opc = SUB}}
  28 \ncarc[arcangle=20]{sub}{idle}
  29
  30 \ncarc[arcangle=20]{idle}{mul}\ncput*[npos=.50]{\shortstack{do\_calc$\uparrow$ \emph{\textbf{and}}\\opc = MUL}}
  31 \ncarc[arcangle=20]{mul}{idle}
  32
  33 \ncarc[arcangle=20]{idle}{div}\ncput*[npos=.50]{\shortstack{do\_calc$\uparrow$ \emph{\textbf{and}}\\opc = DIV}}
  34 \ncarc[arcangle=20]{div}{idle}
  35 \end{document}