1076-2008 - IEEE Standard VHDL Language Reference Manual

The VHSIC Hardware Description Language (VHDL) is a formal notation intended for use in all phases of the creation of electronic systems. Because it is both machine readable and human readable, it supports the development, verification, synthesis, and testing of hardware designs; the communication of hardware design data; and the maintenance, modification, and procurement of hardware. This document, IEEE Std 1076-2008, is a revision of IEEE Std 1076-2002 as amended by IEEE Std1076c-2007. Initial work on gathering requirements and developing language extensions was undertaken by the IEEE VHDL Analysis and Standardization Group (VASG), otherwise known as the 1076 Working Group. Subsequently, Accellera sponsored an effort to complete that work and draft a revised Language Reference Manual. That draft was returned to IEEE for final revision and approval, resulting in this document and the associated machine-readable files. This revision incorporates numerous enhancements, both major and minor, to previously existing language feaures and several new language features. The changes are summarized in Annex E. In addition, several VHDL library packages that were previously defined in separate standards are now defined in this standard, ensuring that they are treated as integral parts of the language. Finally, this revision incorporates the IEEE Property Specification Language (PSL) as part of VHDL. The combination of these changes significantly improves VHDL as a language for specification, design, and verification of complex electronic systems.
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