What does rt stands for in MIPS instruction format?

StackOverflow https://stackoverflow.com/questions/7345550

  •  27-10-2019
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Question

Take MIPS instruction format described here, there are some abbreviations eg rd,rs and rt. What does rt stands for? I know rt is the second source register in R-type instruction, and is the destination register in I-type instruction. It is easy to guess rd stands for register destination; rs stands for register source. What about rt? I guess it might be "register temporary"? Is there an authoritative source about this?

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Solution

t is just the next letter after s, so rs is the first source register, rt is the second source register. (If there could be a third source register it would most likely be ru.)

OTHER TIPS

rt stands for "register target". Just like been said above, in I-Type commands, the result is written into rt

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