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Parameterized macros in sv

jzingman

I'm trying to write what I thought was a fairly simple macro in sv:

 `define DISPLAY  (value) `"INFO:    %0t value = %0x (%m)`", `$time, value

invoked by

  $display (`DISPLAY(bitcnt));

When I try it, I get a lot of error messages:

      $display(`DISPLAY(out_bitcnt));
                      |
ncvlog: *E,EXPRPA (flex_ssi_model.vi,432|22): expecting a right parenthesis (')') [10.2.2][14(IEEE)].
(`define macro: DISPLAY [flex_ssi_model.vi line 19], `include file: flex_ssi_model.vi line 432, file: ./flex_ssi_model.sv line 18)
      $display(`DISPLAY(out_bitcnt));
                      |
ncvlog: *E,EXPCPD (flex_ssi_model.vi,432|22): expecting a valid compiler directive [16(IEEE)].
(`define macro: DISPLAY [flex_ssi_model.vi line 19], `include file: flex_ssi_model.vi line 432, file: ./flex_ssi_model.sv line 18)

 Am I missing something obvious?  I'm running IUS92-s030 in Linux64 using the ncvlog/ncelab flow. The errors are in the ncvlog step.

 Thanks

 Jonathan Zingman

Parents

  • Hi,

     Regarding the space after the macro name, the LRM says, "If formal arguments are used, the list of formal argument names shall be enclosed in parentheses following the name of the macro... The left parenthesis shall follow the text macro name immediately, with no space in between." That is how the compiler knows that the left parenthesis begins an argument list, and is not part of the macro text.

    You are correct, though, that you need `", but not for the reason you state. You need `" so that "value" will be substituted by the argument value.

    Regards,

    Shalom

Reply

  • Hi,

     Regarding the space after the macro name, the LRM says, "If formal arguments are used, the list of formal argument names shall be enclosed in parentheses following the name of the macro... The left parenthesis shall follow the text macro name immediately, with no space in between." That is how the compiler knows that the left parenthesis begins an argument list, and is not part of the macro text.

    You are correct, though, that you need `", but not for the reason you state. You need `" so that "value" will be substituted by the argument value.

    Regards,

    Shalom

Children
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