\begin{table}[p]
\caption{RISC-V ISA}
\label{tab:ISA}
\begin{small}
\begin{center}
\begin{tabular}{p{0in}p{0.4in}p{0.05in}p{0.05in}p{0.05in}p{0.05in}p{0.4in}p{0.6in}p{0.4in}p{0.6in}p{0.7in}l}
& & & & & & & & & & \\
                      &
\multicolumn{1}{l}{\instbit{31}} &
\multicolumn{1}{r}{\instbit{27}} &
\instbit{26} &
\instbit{25} &
\multicolumn{1}{l}{\instbit{24}} &
\multicolumn{1}{r}{\instbit{20}} &
\instbitrange{19}{15} &
\instbitrange{14}{12} &
\instbitrange{11}{7} &
\instbitrange{6}{0} \\
\cline{2-11}


&
\multicolumn{4}{|c|}{funct7} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{funct3} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{opcode} & R-type \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{funct3} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{opcode} & I-type \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[11:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{funct3} &
\multicolumn{1}{c|}{imm[4:0]} &
\multicolumn{1}{c|}{opcode} & S-type \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{funct3} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{opcode} & B-type \\
\cline{2-11}


&
\multicolumn{8}{|c|}{imm[31:12]} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{opcode} & U-type \\
\cline{2-11}


&
\multicolumn{8}{|c|}{imm[20$\vert$10:1$\vert$11$\vert$19:12]} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{opcode} & J-type \\
\cline{2-11}


&
\multicolumn{10}{c}{} & \\
&
\multicolumn{10}{c}{\bf RV32I Base Instruction Set} & \\
\cline{2-11}


&
\multicolumn{8}{|c|}{imm[31:12]} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110111} & LUI \\
\cline{2-11}


&
\multicolumn{8}{|c|}{imm[31:12]} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010111} & AUIPC \\
\cline{2-11}


&
\multicolumn{8}{|c|}{imm[20$\vert$10:1$\vert$11$\vert$19:12]} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{1101111} & JAL \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{1100111} & JALR \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BEQ \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BNE \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{100} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BLT \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BGE \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{110} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BLTU \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[12$\vert$10:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{111} &
\multicolumn{1}{c|}{imm[4:1$\vert$11]} &
\multicolumn{1}{c|}{1100011} & BGEU \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0000011} & LB \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0000011} & LH \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{010} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0000011} & LW \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{100} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0000011} & LBU \\
\cline{2-11}


&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0000011} & LHU \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[11:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{imm[4:0]} &
\multicolumn{1}{c|}{0100011} & SB \\
\cline{2-11}


&
\multicolumn{4}{|c|}{imm[11:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{imm[4:0]} &
\multicolumn{1}{c|}{0100011} & SH \\
\cline{2-11}

&
\multicolumn{4}{|c|}{imm[11:5]} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{010} &
\multicolumn{1}{c|}{imm[4:0]} &
\multicolumn{1}{c|}{0100011} & SW \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & ADDI \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{010} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & SLTI \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{011} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & SLTIU \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{100} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & XORI \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{110} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & ORI \\
\cline{2-11}

&
\multicolumn{6}{|c|}{imm[11:0]} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{111} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & ANDI \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{shamt} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & SLLI \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{shamt} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & SRLI \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0100000} &
\multicolumn{2}{c|}{shamt} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0010011} & SRAI \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & ADD \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0100000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{000} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SUB \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SLL \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{010} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SLT \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{011} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SLTU \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{100} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & XOR \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SRL \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0100000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & SRA \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{110} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & OR \\
\cline{2-11}

&
\multicolumn{4}{|c|}{0000000} &
\multicolumn{2}{c|}{rs2} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{111} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{0110011} & AND \\
\cline{2-11}

&
\multicolumn{10}{c}{} & \\
&
\multicolumn{10}{c}{\bf RV32/RV64 \emph{Zicsr} Standard Extension} & \\
\cline{2-11}

&
\multicolumn{6}{|c|}{csr} &
\multicolumn{1}{c|}{rs1} &
\multicolumn{1}{c|}{001} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{1110011} & CSRRW \\
\cline{2-11}

&
\multicolumn{6}{|c|}{csr} &
\multicolumn{1}{c|}{uimm} &
\multicolumn{1}{c|}{101} &
\multicolumn{1}{c|}{rd} &
\multicolumn{1}{c|}{1110011} & CSRRWI \\
\cline{2-11}

\end{tabular}
\end{center}
\end{small}

\end{table}