Specifying ordering on atomic instructions

[markww]

It would be helpful to have a bit in here describing specifying ordering for atomic instructions. I've looked around, and while I've determined that you can set the rl bit by adding a .rl on an atomic instruction, and the aq bit by adding a .aq, I can't figure out how one requests both. The specification seems to indicate that this is possible in section 7.2:

Setting both aq and rl bits on the LR instruction, and setting the aq bit on the SC instruction makes the LR/SC sequence sequentially consistent with respect to other sequentially consistent atomic
operations.

I've tried the forms lr.d.aq.rl, lr.d.sc, and lr.d.sq (my best guesses for notation) and the assembler complained.

[asb]

This should definitely be clarified in the docs, but to address your immediate problem: you want .aqrl

[jim-wilson]

It isn't clear what question you are asking, and it doesn't appear related to this topic. Please open new issues for new questions, and please explain what problem you are trying to solve.