MIPS汇编指令转换为十六进制机器码详解

"将下列MIPS汇编指令转换为十六进制机器码\n1. add $10,$8,$9\n2. nor $20,$18,$19\n3. srl $23,$22,5\n4. lw $15,$8,40\n转换过程内容：1. add $10,$8,$9\n 汇编指令格式：add $rd, $rs, $rt\n 机器码格式：000000 rs rt rd 00000 100000\n 将寄存器编号转换为二进制：\n $10 = 01010\n $8 = 00100\n $9 = 00101\n 将二进制转换为十六进制：\n rs = 01010 = A\n rt = 00100 = 4\n rd = 00101 = 5\n 机器码为：000000 00100 00101 01010 00000 100000\n 转换为十六进制：0x004A0000\n\n2. nor $20,$18,$19\n 汇编指令格式：nor $rd, $rs, $rt\n 机器码格式：000000 rs rt rd 00000 100111\n 将寄存器编号转换为二进制：\n $20 = 10100\n $18 = 10010\n $19 = 10011\n 将二进制转换为十六进制：\n rs = 10100 = 14\n rt = 10010 = 12\n rd = 10011 = 13\n 机器码为：000000 10010 10011 10100 00000 100111\n 转换为十六进制：0x12D40000\n\n3. srl $23,$22,5\n 汇编指令格式：srl $rd, $rt, sa\n 机器码格式：000000 00000 rt rd sa 000010\n 将寄存器编号转换为二进制：\n $23 = 10111\n $22 = 10110\n 将二进制转换为十六进制：\n rt = 10110 = 16\n rd = 10111 = 17\n sa = 00000101 = 5\n 机器码为：000000 00000 10110 10111 00000101 000010\n 转换为十六进制：0x0017A005\n\n4. lw $15,$8,40\n 汇编指令格式：lw $rt, offset($rs)\n 机器码格式：100011 rs rt offset\n 将寄存器编号转换为二进制：\n $15 = 01111\n $8 = 00100\n 将偏移量转换为二进制，并补齐到16位：\n offset = 0000000000101000\n 将二进制转换为十六进制：\n rs = 00100 = 4\n rt = 01111 = F\n offset = 0000000000101000 = 0000 0000 0010 1000 = 0028\n 机器码为：100011 00100 01111 0000000000101000\n 转换为十六进制：0x8F280028\n"