yosys/tests/select/mod-attribute.ys

read_rtlil <<EOT
module \pdk_not

  wire input 1 \A
  wire output 2 \Y

  cell $_NOT_ \not
    connect \A \A
    connect \Y \Y
  end

end

module \pdk_buf

  wire input 1 \A
  wire output 2 \Y

  cell $_BUF_ \buf
    connect \A \A
    connect \Y \Y
  end

end

module \top
  wire input 1 \A
  wire output 2 \Y
  wire \w

  cell \pdk_buf \buf
    connect \A \A
    connect \Y \w
  end

  cell \pdk_not \not
    connect \A \w
    connect \Y \Y
  end

end
EOT

cellmatch -derive_luts *

select -set buffers a:lut=2'b10 %m
select -set inverters a:lut=2'b01 %m

select -assert-count 1 t:@buffers t:pdk_buf %i
select -assert-count 0 t:@buffers t:pdk_not %i
select -assert-count 0 t:@inverters t:pdk_buf %i
select -assert-count 1 t:@inverters t:pdk_not %i