add andq and sarq, for issue #199

Author: jsiek

book.tex

@@ -12141,11 +12141,6 @@ \chapter{Tuples and Garbage Collection}
 \index{subject}{vector}
 \setcounter{footnote}{0}
 
-%% \margincomment{\scriptsize To do: Flesh out this chapter, e.g., make sure
-%%   all the IR grammars are spelled out! \\ --Jeremy}
-%% \margincomment{\scriptsize Be more explicit about how to deal with
-%%   the root stack. \\ --Jeremy}
-
 In this chapter we study the implementation of tuples\racket{, called
   vectors in Racket}.  A tuple is a fixed-length sequence of elements
 in which each element may have a different type.
@@ -13552,12 +13547,16 @@ \section{Select Instructions and the \LangXGlobal{} Language}
 
 \newcommand{\GrammarXGlobal}{
 \begin{array}{lcl}
+  \Instr &::=& \key{andq}~\Arg\key{,}~\Arg
+          \MID \key{sarq}~\Arg\key{,}~\Arg \\
   \Arg &::=& \itm{label} \key{(\%rip)} 
 \end{array}
 }
 
 \newcommand{\ASTXGlobalRacket}{
 \begin{array}{lcl}
+  \Instr &::=& \BININSTR{\scode{andq}}{\Arg}{\Arg} \MID
+               \BININSTR{\scode{sarq}}{\Arg}{\Arg} \\
   \Arg &::=&  \GLOBAL{\itm{label}} 
 \end{array}
 }
@@ -13631,8 +13630,9 @@ \section{Select Instructions and the \LangXGlobal{} Language}
 
 The definitions of the concrete and abstract syntax of the
 \LangXGlobal{} language are shown in figures~\ref{fig:x86-2-concrete}
-and \ref{fig:x86-2}.  It differs from \LangXIf{} only in the addition
-of global variables.
+and \ref{fig:x86-2}.  It differs from \LangXIf{} with the addition
+of global variables and the instructions needed to compile
+tuple length: \code{andq} and \code{sarq}.
 %
 Figure~\ref{fig:select-instr-output-gc} shows the output of the
 \code{select\_instructions} pass on the running example.