打印MIPS注册内容 [英] Print MIPS Register Contents

问题描述

我试图将MIPS寄存器中的无符号整数值作为ASCII文本打印到控制台.

I am trying to print an unsigned integer value from a MIPS register as ASCII text to the console.

换句话说，让我们假设$ a0中包含"0x4ab3c823".我想打印出"4ab3c823"以在xSPIM中进行控制台.

In other words, let's pretend $a0 has "0x4ab3c823" in it. I want to print out "4ab3c823" to console in xSPIM.

这是我的尝试.我一直在获取十进制值，而不是ASCII.这只是整个程序的一部分，因此我将其余部分剪掉.

Here is my attempt. I keep getting the decimal values, not the ASCII. It's only a snipped of the entire program, so I cut out the rest.

.data
printspace:   .space 8
.text
printHex:
    move    $t0,$a0
    la      $a0,printspace  #Save address of 8 blank bytes to $a0
    sw      $t0,0($a0)      #Copys the integer I want to print to $a0's address in memory
    li      $v0 1
    syscall

    jr      $ra

推荐答案

我假设您是要十六进制输出，因为ASCII输出将与其他字母一起显示.

I assume you mean you want hex output, as ASCII output would be with other letters.

我不认为SPIM具有十六进制输出.这意味着您将必须逐个字符地打印.这将涉及一次将$ a0取四位，并添加一个常量(取决于它在0-9还是A-F之间)，以将其转换为可打印的ASCII字符.

I don't think SPIM has hex output. That means you would have to print character by character. That would involve taking $a0 four bits at a time, and adding a constant (depending on if it's between 0-9 or A-F) to turn it into a printable ASCII character.

在MARS模拟器中，li $v0 34以十六进制打印.

In the MARS simulator, li $v0 34 prints in hex.

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