+\begin{describe*}
+ {\dhead*{cls}{@<code>-inst (inst) \&key \dots}
+ \dhead*{fn}{make-@<code>-inst \dots}
+ \dhead*{gf}{inst-@<slot> @<inst> @> @<value>}}
+ \def\instclass#1#2#3{%
+ #1{cls}{#3-inst}[#2]%
+ #1{fun}{make-#3-inst}[#2]%
+ }
+ \def\instslot#1#2#3{#1{gf}{inst-#3}[#2]}
+ \def\makelabels#1#2{%
+ \def\x{\instclass{#1}{#2}}
+ \x{var} \x{set} \x{update} \x{cond} \x{return} \x{break} \x{continue}
+ \x{expr} \x{call} \x{banner} \x{block} \x{if} \x{for} \x{while}
+ \x{do-while} \x{function}
+ \def\x{\instslot{#1}{#2}}
+ \x{name} \x{type} \x{init} \x{var} \x{expr} \x{op} \x{cond} \x{conseq}
+ \x{alt} \x{func} \x{args} \x{control} \x{decls} \x{body} \x{update}
+ \x{banner} \x{banner-args}
+ }
+ \makelabels{\desclabel}{|(}
+
+ Sod provides a number of built-in instruction types generated by
+ \descref{mac}{definst}: see \xref{tab:codegen.codegen.insts}.
+
+ \makelabels{\descindex}{|)}
+\end{describe*}
+