AR# 11478: 3.1i Virtex PAR - Cost table results for MPPR and non-MPPR do not match.
3.1i Virtex PAR - Cost table results for MPPR and non-MPPR do not match.
Keywords: MPPR, Multi-Pass, -n, cost, table, different, results, match
General Description: Cases have been seen where MPPR and non MPPR PAR runs do not give identical results. This should not happen if the software environment, PAR options, and input files are the same, as the PAR algorithms are deterministic. Similar problems have been discovered and fixed in the past.
NOTE: This issue affects the Virtex, Virtex-E and Spartan-II device architectures.