2013-07-20 13:19:12 +00:00
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2015-08-14 08:56:05 +00:00
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\chapter{Auxiliary Libraries}
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2013-07-20 13:19:12 +00:00
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2015-08-14 08:56:05 +00:00
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The Yosys source distribution contains some auxiliary libraries that are bundled
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2013-07-20 13:19:12 +00:00
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with Yosys.
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\section{SHA1}
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2014-08-01 17:01:10 +00:00
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The files in {\tt libs/sha1/} provide a public domain SHA1 implementation written
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by Steve Reid, Bruce Guenter, and Volker Grabsch. It is used for generating
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unique names when specializing parameterized modules.
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2013-07-20 13:19:12 +00:00
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\section{BigInt}
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The files in {\tt libs/bigint/} provide a library for performing arithmetic with
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arbitrary length integers. It is written by Matt McCutchen \citeweblink{bigint}.
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The BigInt library is used for evaluating constant expressions, e.g.~using the {\tt
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ConstEval} class provided in {\tt kernel/consteval.h}.
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\section{SubCircuit}
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\label{sec:SubCircuit}
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The files in {\tt libs/subcircuit} provide a library for solving the subcircuit
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isomorphism problem. It is written by Clifford Wolf and based on the Ullmann
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Subgraph Isomorphism Algorithm \cite{UllmannSubgraphIsomorphism}. It is used by
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the {\tt extract} pass (see {\tt help extract} or Sec.~\ref{cmd:extract}).
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\section{ezSAT}
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The files in {\tt libs/ezsat} provide a library for simplifying generating CNF
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formulas for SAT solvers. It also contains bindings of MiniSAT. The ezSAT
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library is written by Clifford Wolf. It is used by the {\tt sat} pass (see
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{\tt help sat} or Sec.~\ref{cmd:sat}).
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