Re: DC-WG: DCDL script for demo

Robert A. Dilly (dilly@btv.ibm.com)
Tue, 18 May 1999 16:58:41 -0400

Folks-
Our tool flagged the multi_cycle_path command as an error.
Its coded thus in btoh files (where its used):

>
># ------------------------------------------------------------------------
># Multi-cycle paths
># ------------------------------------------------------------------------
>multi_cycle_path -source -early 1 -late 2 -to { MemWrite MemRead }
>

I interpreted the revised syntax a little differently. I refer to
http://www.vhdl.org/dcwg/hm/0225.html

which describes the syntax as:

dcd::multi_cycle_path
?-target | -source? /* only -source supported for DAC */
?-from <pin_list>?
?-through <pin_list>?
?-to <pin_list>?
?-early | -late?
<cycle_offset> /* only integer values supported for DAC */

either -early or -late (possibly neither).

It looks to me like they are not in agreement?

I have no preference, just want to make things consistent and
get our code fixed. :-)

By the way, I don't know if I ever asked this, but I'm not exactly
clear on the intent of ?-target | -source? which is used in
data_required_time and multi_cycle_path. I looked at the related
BuildGates commands, but didn't see anything I could relate the
concept to.

Thanks........ Bob