thesis/terms.tex


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\section{Terminology}
\label{sec:terminology}

\begin{multicols}{2}

\begin{description}
	\item[HNF]
		Head normal form, the state of a graph node that cannot be rewritten itself (though it children may).
	\item[ISA]
		Instruction set architecture.
	\item[IT block]
		If-then block, a Thumb construct for conditional execution.
	\item[LSB(s)]
		Least significant bit(s), the bit(s) with the lowest value in a word.
	\item[PC]
		Program counter, \ual{r15} on ARM.
	\item[RTS]
		Run-time system.
		Clean's run-time system ensures that the \clean{Start} node is reduced and printed.
		It also takes care of garbage collecting.
	\item[SP]
		Stack pointer, \ual{r13} on ARM.
	\item[UAL]
		Unified Assembler Language.
		\todo{reference, more explanation.}
\end{description}

\end{multicols}