[myhdl-list] attribute enum_encoding: string;

[David H. <da...@ad...>]

Hello, When using ghdl for syntax checks, I get the following error for any
state machine where encoding="one_hot":
pcie_drx.vhd:137:11: no declaration for "enum_encoding"

I can resolve ghdl's complaints by adding
  attribute enum_encoding: string;
to the generated .vhd file.

Is there a way to have this line included automatically in .vhd output?  I
could add it via a shell script, but I'm wondering if there is "better way"
to do it.  (or is GHDL in error?)


For example, here is an trimmed-down excerpt from the top of the .vhd file
showing where I add the line:

package pck_pcie_drx is
>     attribute enum_encoding: string;  <--- I need to add this line.

    type t_enum_t_state_22 is (
>
    IDLE,

    THINK,

    SEND_CMD,

    ADVANCE

);

attribute enum_encoding of t_enum_t_state_22: type is "0001 0010 0100 1000";

    type t_enum_t_state_23 is (
>     CMD,
>     MWR_H0H1,
>     MWR32_H2D0,
>     MWR32_D1D2,
>     MWR32_D3XX,
>     MWR64_H2H3,
>     MWR64_D0D1,
>     DROP
> );
> attribute enum_encoding of t_enum_t_state_23: type is "00000001 00000010
> 00000100 00001000 00010000 00100000 01000000 10000000";
> end package pck_pcie_drx;
> library IEEE;
> etc...




- David
  ps:  Thank you for the fantastic MyHDL.