Eggenmüller Bernd <egg...@gmx.de> writes: > how can I disallow the mov operation for a register class. > Can someone help me?
Please do not start a new thread by replying to an existing message. That hides your message for all of us who use threaded e-mail readers. If there is some mode which can be stored in both register classes, then gcc requires that you provide a way to move values between those registers. So you can't really disallow it. You could disallow direct moves between the register classes if you like; you can do that by setting REGISTER_MOVE_COST for the modes and by providing secondary reloads to actually move the values. Ian
