CodePudding user response:
ALUsrc is used to control the sign here - the extend immediately expand parts, that is to say, for all of the I type - number of instruction is not to need to immediately expand this part at this time (ALUsrc) a value of 0, for type I - instructions it has a value of 1CodePudding user response:
IsIs not well, I checked the information, here alusrc state 0 means the output of the data from reading 2, state 1 from signextend said the sign bit