Xilinx Command Line Tools User Guide: (UG628)

Chapter 4: NetGen
Syntax
-intstyle ise|xflow
When using -intstyle, one of three modes must be specified:
• -intstyle ise indicates the program is being run as part of an integrated design
environment.
• -intstyle xflow indicates the program is being run as part of an integrated
batch flow.
Note -intstyle is automatically invoked when running in an integrated environment
such as Project Navigator or XFLOW.
-mhf (Multiple Hierarchical Files)
This option is used to write multiple hierarchical files. One hierarchical file will be
written for each module that has the KEEP_HIERARCHY attribute.
Note See Preserving and Writing Hierarchy Files for additional information.
Syntax
-mhf
-ofmt (Output Format)
This is a required option that specifies the output format for netlists (either Verilog
or VHDL).
Syntax
-ofmt verilog|vhdl
-pcf (PCF File)
This option lets you specify a Physical Constraints File (PCF) as input to NetGen. You
only need to specify a PCF file if you use prorating constraints (temperature and/or
voltage).
Temperature and voltage constraints and prorated delays are described in the Constraints
Guide (UG625).
Syntax
-pcf pcf_file.pcf
-s (Change Speed)
This option instructs NetGen to annotate the device speed grade you specify to the
netlist.
Syntax
-s speed grade|min
speed grade can be entered with or without the leading dash. For example, both -s 3
and -s -3 are allowed.
Some architectures support the -s min option, which instructs NetGen to annotate
a process minimum delay, rather than a maximum worst-case to the netlist. Use the
Speedprint or PARTGen utility programs in the software to determine whether process
minimum delays are available for your target architecture. See the PARTGen chapter for
additional information.
Command Line Tools User Guide
50 www.xilinx.com UG628 (v 14.2) July 25, 2012