Xilinx 8.2i manual Netlist Launcher Rules Files, User Rules File, User Rules and System Rules

Models: 8.2i

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Appendix :

R

Netlist Launcher Rules Files

The behavior of the Netlist Launcher is determined by rules defined in the system rules file and the user rule file. These rules determine the following:

What netlist source files are acceptable

Which netlist reader reads each of these netlist files

What the default options are for each netlist reader

The system rules file contains the default rules supplied with the Xilinx Development

System software. The user rules file can add to or override the system rules.

User Rules File

The user rules file can add to or override the rules in the system rules file. You can specify the location of the user rules file with the NGDBuild –ur option. The user rules file must have a .urf extension. See “–ur (Read User Rules File)” in Chapter 6 for more information.

User Rules and System Rules

User rules are treated as follows:

A user rule can override a system rule if it specifies the same source and target files as the system rule.

A user rule can supplement a system rule if its target file is identical to a system rule’s source file, or if its source file is the same as a system rule’s target file.

A user rule that has a source file identical to a system rule’s target file and a target file that is identical to the same system rule’s source file is illegal, because it defines a loop.

User Rules Format

Each rule in the user rules file has the following format:

RuleName = <rulename1>;

<key1> = <value1>;

<key2> = <value2>;

.

.

.

<keyn> = <valuen>;

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Development System Reference Guide

Page 388
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Xilinx 8.2i manual Netlist Launcher Rules Files, User Rules File, User Rules and System Rules, User Rules Format