\documentclass{article} \usepackage[a6paper,margin=2cm,top=5mm,bottom=5mm]{geometry} \usepackage{xcolor} \usepackage[hidelinks]{hyperref} \begin{document} \pagestyle{empty} \setlength\fboxrule{.5pt} \setlength\fboxsep{0pt} \renewcommand{\arraystretch}{1.2} \setlength{\tabcolsep}{.5em} \parindent0pt \begin{center} \textbf{Clean RTS cheat sheet, x64 linux} \end{center} {\hfill \fcolorbox{black}{white}{% \begin{tabular}{ll} A0 & rcx \\ A1 & rdx \\ A2 & r8 \\ \hline B0 & rax \\ B1 & rbx \\ B2 & r10 \\ B3 & r11 \\ B4 & r12 \\ B5 & r13 \\ B6 & r14 \\ \hline asp & rsi \\ bsp & rsp \\ hp & rdi \\ free & r15 \\ \hline scratch & rbp \\ scratch & r9 \\ \end{tabular}% } \hfill \fcolorbox{black}{white}{% \begin{tabular}{ll} rax & B0 \\ rbx & B1 \\ rcx & A0 \\ rdx & A1 \\ \hline rbp & scratch \\ rdi & hp \\ rsi & asp \\ rsp & bsp \\ \hline r8 & A2 \\ r9 & scratch \\ r10 & B2 \\ r11 & B3 \\ r12 & B4 \\ r13 & B5 \\ r14 & B6 \\ r15 & free \\ \end{tabular}% } \hfill} \bigskip \centering \fcolorbox{black}{white}{% \setlength{\tabcolsep}{.2em}% \begin{tabular}{lcccccc} \multicolumn{7}{c}{\textbf{Function Calls}}\\\hline Arguments: & rdi & rsi & rdx & rcx & r8 & r9\\ & hp & asp & A1 & A0 & A2 & scr\\ \hline Result: & rax & rdx \\ & B0 & A1 \\ \hline Callee-saved: & rbx & rbp & r12 & r13 & r14 & r15 \\ & B1 & scr & B4 & B5 & B6 & free \\ \end{tabular}% } \bigskip \tiny \url{https://gitlab.science.ru.nl/cstaps/clean-rts-cheat-sheet} \end{document}