Editing VHDL (section)

{{Short description|Hardware description language}}
{{For|Verilog HDL|Verilog}}
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{{Infobox <!--Hardware Description Language-->programming language
| name = VHDL
| logo = 
| paradigm = [[Concurrent computing|concurrent]], [[Reactive programming|reactive]], [[Dataflow programming|dataflow]]
| family = 
| year = 1980s
| designer = 
| developer = 
| latest_release_version = IEEE 1076-2019
| latest_release_date = {{start date and age|df=yes|2019|12|23}}
| latest_test_version = 
| latest_test_date = 
| typing = [[Strongly typed programming language|strong]]
| implementations = 
| dialects = [[VHDL-AMS]]
| influenced_by = [[Ada (programming language)|Ada]],<ref name="Coelho1989">{{cite book |author=David R. Coelho |title=The VHDL Handbook |url=https://books.google.com/books?id=IxZqlbYMJCIC&q=Ada |date=30 June 1989 |publisher=Springer Science & Business Media |isbn=978-0-7923-9031-2}}</ref> [[Pascal (programming language)|Pascal]]
| influenced = 
| operating_system = 
| license = 
| File extensions = .vhd
| website = [https://opensource.ieee.org/vasg IEEE VASG]
| wikibooks = Programmable Logic/VHDL
}}

[[File:Vhdl signed adder source.svg|thumb|VHDL source for a signed [[Adder (electronics)|adder]]]]

'''VHDL''' ([[Very High Speed Integrated Circuit Program|VHSIC]] Hardware Description Language) is a [[hardware description language]] that can model the behavior and structure of [[Digital electronics|digital systems]] at multiple levels of abstraction, ranging from the system level down to that of [[logic gates]], for design entry, documentation, and verification purposes. The language was developed for the US military [[Very High Speed Integrated Circuit Program|VHSIC]] program in the 1980s, and has been standardized by the [[Institute of Electrical and Electronics Engineers]] (IEEE) as '''IEEE&nbsp;Std&nbsp;1076'''; the latest version of which is '''IEEE&nbsp;Std&nbsp;1076-2019'''. To model [[Analogue electronics|analog]] and [[Mixed-signal integrated circuit|mixed-signal]] systems, an IEEE-standardized HDL based on VHDL called [[VHDL-AMS]] (officially IEEE&nbsp;1076.1) has been developed.