Answers Database

XDM 5.0 only allows you to set APR seed value of 0-99


Record #377

Product Family:  Software

Product Line:  FPGA Core

Problem Title:
XDM 5.0 only allows you to set APR seed value of 0-99


Problem Description:
When the APR program is executed, it uses a random seed to determine the
initial placement, so that different results can be produced from place
and route. It is possible to set the seed number to a fixed value so
that results for a given place and route run on a specific design can
be repeated. While the seed number can be anywhere from  0 to 32767,
XDM 5.0 will only allow a number from 0 to 99.


Solution 1:



There is really no advantage to using one seed number over another, so picking a
 number less than 99 is no less advantageous than picking one less than 32767. I
f for some reason you need to use a specific seed larger than 99, you
must run apr from the command line.




End of Record #377