Assembly what is ret?

Question

I am new to assembly and I saw the following line of code

ret

What does it do? I looked in my RiscV Green Card but didn't find it. Is it like j, does it store or load any data?

Answer 1

It is a pseudo instruction. It is eqvivalent to jalr x0, x1, 0. x1 holds the return address. Effectively jumping to the return address.

For more info on JALR see page 16 here.