Chapter 9
Foundation Express Compiler Directives
The Synopsys HDL compiler has several methods of writing circuit design information directly in your VHDL source code.
- Using compiler directives, you can direct the translation from VHDL to components with special VHDL comments.
These synthetic comments turn translation on or off, specify one of several hard-wired resolution methods, and provide a means to map subprograms to hardware components.
- Using Synopsys-defined VHDL attributes, you can add synthesis-related signal and constraint information to ports, components, and entities.
This information is used by Foundation Express during synthesis.
This chapter explains how to use the compiler directives and Synopsys-defined VHDL attributes to write circuit design information directly into the VHDL source code. The chapter is divided into the following sections.
