[英]MIPS/Assembly: How do I find register value by hand after an instruction is executed?
I was hoping someone could point me in the right direction. 我希望有人可以指出正确的方向。 I have an instruction to find the content of a register after an executed instruction.
我有一条指令,可以在执行一条指令后查找寄存器的内容。 The instruction:
说明:
add $s1, $s5, $t9 加$ s1,$ s5,$ t9
Register $s1 contents before the instruction: 0x00000457 在指令前注册$ s1内容:0x00000457
How would I go about doing this by hand? 我将如何手工进行?
I know the instruction converted into binary is (based on register numbers, which is probably wrong. But I tried it considering I had no values): 我知道转换为二进制的指令是(基于寄存器号,这可能是错误的。但是考虑到我没有值,我尝试了它):
0000 0010 1011 1000 1000 1000 0010 0000
But I don't really understand how to figure out what the value after that instruction would be. 但是我真的不明白如何弄清楚那条指令后的价值。
$s1
is the write-only destination for add $s1, $s5, $t9
. $s1
是add $s1, $s5, $t9
的只写目标。 It does 确实
$s1 = $s5 + $t9
The starting value of $s1
is completely irrelevant and tells you nothing; $s1
的起始值完全无关紧要,什么也没告诉您。 the instruction has no dependency on it. 该指令对此没有依赖性。
You need the values of the source operands, $s5
and $t9
. 您需要源操作数
$s5
和$t9
。
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