Behavioral Description Language
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Behavioral Description Language (BDL) is a programming language based on ANSI C with extensions for hardware description, developed to describe hardware at levels ranging from the algorithm level to the functional level.
Although the term behavioral description language is a generic term and can refer to multiple high level description languages, NEC Corporation has developed a C-subset called BDL for High Level Synthesis. This C-subset includes its own data types (called var-class), special constants for hardware design e.g. high impedance, timing descriptors and control statements.
As BDL is meant for Hardware synthesis, the complete ANSI-C syntax is not supported. The principal unsupported operations are: (i) Floating point data types (ii) Sizeof operator (iii) unions and (iv) Recursive functions.
BDL is sometimes also known as Cyber C because it is synthesized using NEC's High Level Synthesis tool called CyberWorkBench [1].
References
K. Wakabayashi and T. Okamoto. 2006. C-based SoC design flow and EDA tools: an ASIC and system vendor perspective. Trans. Comp.-Aided Des. Integ. Cir. Sys. 19, 12 (November 2006), 1507-1522. DOI=10.1109/43.898829 http://dx.doi.org/10.1109/43.898829