On Mon, Mar 20, 2023 at 2:19 PM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote: > The conditional MOVS instruction that appears to have been added to test > for the TIF_USING_IWMMXT thread_info flag only sets the N and Z > condition flags and register R7, none of which are referenced in the > subsequent code. Really? As far as I know, the rsb instruction is a "reversed subtract" and that also sets the carry flag. And so does a move with a shifter argument (the last dropped bit is moved to the carry flag). What am I missing? Nicolas
