将整数转换为其十六进制值以进行打印 [英] Convert integer to its hexidecimal value to print

问题描述

假设我将一个分配给$ a0的整数用作整数，该如何以十六进制格式打印该整数?

Say I take an integer assigned to $a0, how do I go about and print the integer in its Hexadecimal form?

推荐答案

使用syscall 34. MARS系统调用

Use syscall 34. MARS syscalls

如果您使用的模拟器没有该系统调用，或者您只想查看必要的字节，则需要手动进行.最简单的方法是迭代.获取一个10字节的字符串(8个十六进制值和前导0x).

If you are using a simulator which does not have that syscall, or you want to see only the necessary bytes, you will need to do it manually. The easiest approach would be iterative. Get a string of 10 bytes (8 hex values and leading 0x).

1)按位和$ a0的常量为15.

1) Bitwise and $a0 with constant 15.

2)将结果转换为ASCII形式的等效十六进制值.查找表将是干净高效的.

2) Convert result to equivalent hex value in ASCII. A lookup table would be clean and efficient.

3)将等效的十六进制值存储在字符串的空间中.请记住一点点字节序问题.

3) Store equivalent hex value in space for string. Keep in mind little endian issues.

4)逻辑右移$ a04.

4) Logical right shift $a0 by 4.

5)转到1.

执行该操作，直到$ a0为0，并且您应该在字符串中包含十六进制值，然后可以打印该值.

Do that until $a0 is 0 and you should have the hex value in a string, which you can then print.

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