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166 www.xilinx.com Development System Reference Guide
Chapter 9: PAR
R
• PAR file—a PAR report including summary information of all placement and routing
iterations.
• PAD file—a file containing I/O pin assignments in a parsable database format.
• CSV file—a file containing I/O pin assignments in a format supported by spreadsheet
programs.
• TXT file—a file containing I/O pin assignments in a ASCII text version for viewing in
a text editor.
• GRF (Guide Report File)— a file that is created when you use the –gf option.
PAR Options
You can customize the placement and routing of your design by specifying one or more of
the command line options when you run PAR. You can place a design without routing it,
perform a single placement, perform a number of placements using different cost tables,
and specify an effort level (std, med, high) based on the complexity of your design.
The following tables list a summary of the PAR command line options, along with a short
description of their functions, default settings, and effort levels:
Table 9-1: Effort Level Options
Option Function Range Default
–ol effort_level Overall placement and routing
effort level
std, med,
high
std
–pl placer_effort_level Placement effort level
(overrides the –ol value for the
placer)
std, med,
high
Determined by
the –ol setting
–rl router_effort_level Routing effort level (overrides
–ol value for the router)
std, med,
high
Determined by
the –ol setting
–xe extra_effort_level Set extra effort level
(only available if -ol is set to
high)
normal,
continue
No extra effort
level is used
Table 9-2: General Options
Option Function Range Default
–f command_file Executes command line
arguments in a specified
command file
N/A No command
line file
–intstyle Reduced screen output to error
and warning messages based on
the integration style you are
running
ise,
xflow,
silent
Display all
information on
the screen
–k Run re-entrant router starting
with existing placement and
routing
N/A Run placement
and standard
router (Do not
run re-entrant
routing)