Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I have the following assembly code snippet I am trying to understand. It is assembly for a MC68332 microcontroller.
LOOP
some instructions
some more instructions
BEQ LOOP
I’ve googled BEQ and I have found it means branch on result zero, but I still don’t really understand what it does. Does it compare the result of the last instruction to 0, and if it is 0, it goes back to the LOOP line?
On Motorola 68k family, it stands for "branch if equal" which means "jump to given address if zero flag is set" such as when previous comparison is successful.
However, 68332 seems to be different. Based on uppercase syntax, it could be a macro around another instruction which essentially does the same thing.
Assembly programmers who port code from other systems can make use of similar macros to ease the porting process.