mux21

def mux21
port in S
port in I0
port in I1
port out Z
net 1
net 2
net 3
inst m1 nand s s 1
inst m2 nand 1 i0 2
inst m3 nand s i1 3
inst m4 nand 2 3 z
inst outm1 io_out 1
inst outm2 io_out 2
inst outm3 io_out 3

enddef
DEF TOP
  NET I0
  NET I1
  NET S
  NET Z
  INST MUX21 MUX21 I0 I1 S Z
  INST TEST MUX21_TEST I0 I1 S Z
  INST OUTS IO_OUT S
  INST OUTI0 IO_OUT I0
  INST OUTI1 IO_OUT I1
  INST OUTZ IO_OUT Z
ENDDEF