bundled the description of the conditional jumps and the set instructions

book.tex

@@ -6368,44 +6368,36 @@ registers.
 \texttt{pushq} $A$ & $\texttt{rsp} - 8 \to \texttt{rsp}; A \to *\texttt{rsp}$\\
 \texttt{leaq} $A$,$B$ & $A \to B$ ($C$ must be a register) \\
 \texttt{cmpq} $A$, $B$ & compare $A$ and $B$ and set flag \\
-\texttt{je} $L$ & If the flag is set to ``equal'', jump to
-  label $L$ \\ 
-\texttt{jl} $L$ & If the flag is set to ``less'', jump to
-  label $L$ \\ 
-\texttt{jle} $L$ & If the flag is set to ``less or equal'', jump to
-  label $L$ \\ 
-\texttt{jg} $L$ & If the flag is set to ``greater'', jump to
-  label $L$ \\ 
-\texttt{jge} $L$ & If the flag is set to ``greater or equal'', jump to
-  label $L$ \\ 
+\texttt{je} $L$ & \multirow{5}{3.7in}{Jump to label $L$ if the flag matches
+   the condition code, otherwise go to the next instructions.
+  The condition codes are \key{e} for ``equal'', 
+  \key{l} for ``less'', \key{le} for ``less or equal'', \key{g}
+  for ``greater'', and \key{ge} for ``greater or equal''.} \\
+\texttt{jl} $L$ & \\
+\texttt{jle} $L$ & \\
+\texttt{jg} $L$ & \\
+\texttt{jge} $L$ & \\
 \texttt{jmp} $L$ & Jump to label $L$ \\
 \texttt{movq} $A$, $B$ &  $A \to B$ \\
-\texttt{movzbq} $A$, $B$ & $A \to B$ \\
- & \text{where } $A$ is a single-byte register (e.g., \texttt{al} or \texttt{cl}), $B$ is a 8-byte register, \\
- & and the extra bytes of $B$ are set to zero \\
+\texttt{movzbq} $A$, $B$ & 
+  \multirow{3}{3.7in}{$A \to B$, \text{where } $A$ is a single-byte register
+  (e.g., \texttt{al} or \texttt{cl}), $B$ is a 8-byte register, 
+  and the extra bytes of $B$ are set to zero.} \\
+ & \\
+ & \\
 \texttt{notq} $A$ & $\sim A \to A$ \qquad (bitwise complement)\\
 \texttt{orq} $A$, $B$ & $A | B \to B$ \qquad (bitwise-or)\\
 \texttt{andq} $A$, $B$ & $A \& B \to B$ \qquad (bitwise-and)\\
-\texttt{salq} $A$, $B$ & $B$ \texttt{<<} $A \to B$ (where $A$ is a constant)\\
-\texttt{sarq} $A$, $B$ & $B$ \texttt{>>} $A \to B$ (where $A$ is a constant)\\
-\texttt{sete} $A$ & If the flag is set to ``equal'', then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). \\
-\texttt{setne} $A$ & If the flag is set to ``not equal'', then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). \\
-\texttt{setl} $A$ & If the flag is set to ``less'', then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). \\
-\texttt{setle} $A$ & If the flag is set to ``less or equal'', then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). \\
-\texttt{setg} $A$ & If the flag is set to ``greater, then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). \\
-\texttt{setge} $A$ & If the flag is set to ``greater or equal'', then
-   $1 \to A$, else $0 \to A$. \\
- & $A$ must be a single byte register (e.g., \texttt{al} or \texttt{cl}). 
+\texttt{salq} $A$, $B$ & $B$ \texttt{<<} $A \to B$ (arithmetic shift left, where $A$ is a constant)\\
+\texttt{sarq} $A$, $B$ & $B$ \texttt{>>} $A \to B$ (arithmetic shift right, where $A$ is a constant)\\
+\texttt{sete} $A$ & \multirow{5}{3.7in}{If the flag matches the condition code,
+   then $1 \to A$, else $0 \to A$. Refer to \texttt{je} above for the 
+   description of the condition codes. $A$ must be a single byte register
+   (e.g., \texttt{al} or \texttt{cl}).} \\
+\texttt{setl} $A$ & \\
+\texttt{setle} $A$ & \\
+\texttt{setg} $A$ & \\
+\texttt{setge} $A$ & 
 \end{tabular}
 \vspace{5pt}
   \caption{Quick-reference for the x86 instructions used in this book.}