What does rt stands for in MIPS instruction format?

mips abbreviation
Michael Z picture Michael Z · Sep 8, 2011 · Viewed 15.9k times · Source

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?

Answer

Paul R picture Paul R · Sep 8, 2011

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.)

Related questions

Error "gnu/stubs-32.h: No such file or directory" while compiling Nachos source code

I am trying to install Nachos on my laptop and I have Ubuntu 11.04 on the laptop. The code is in C and so to build it I assume I will need cross compiler. This is where my problem is. I …

Read More
Mips how to store user input string

I used to think I knew how to do this. But then I actually tried to do it. Here's the program I wrote but the Berkeley S*** simulator for mac said there was a syntax error on the last line. …

Read More
Difference between "move" and "li" in MIPS assembly language

I was practicing converting C code into MIPS assembly language, and am having trouble understanding the usage of move and li in variable assignment. For example, to implement the following C line in MIPS: int x = 0; If I understand it …

Read More