我正在尝试使用MIPS汇编程序和xspim。我一直在仔细检查代码中失败的部分,并注意到当将0x00000000与0xFFFFFFFF进行比较时,它并没有将这些数字进行应有的比较。在程序失败时,我在$t3中得到了0x00000000,在$t4中得到了0xFFFFFFFFFFF,看起来是这样的:
bge$t3,$t4,lol
#因此,如果t3
大于或等于,我应该向前跳,否则继续。现在的问题是,即使t3
更小,程序也会跳转。
我正在尝试使用MIPS汇编程序和xspim。我一直在仔细检查代码中失败的部分,并注意到当将0x00000000与0xFFFFFFFF进行比较时,它并没有将这些数字进行应有的比较。在程序失败时,我在$t3中得到了0x00000000,在$t4中得到了0xFFFFFFFFFFF,看起来是这样的:
bge$t3,$t4,lol
#因此,如果t3
大于或等于,我应该向前跳,否则继续。现在的问题是,即使t3
更小,程序也会跳转。
这是因为0xffffffff
被解释为-1
,即在2-完成中。
有一些特定的指令可以处理数字,就好像它们是无符号的一样。使用这些说明。(例如,比较bgt
和bgtu
,其中u
代表未签名。)
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