> > No, that just says the asm uses the value of the pointer. > > Not what it points to. > > Err, no, it is *exactly* what it points to that is important here and > you're telling the compiler that the instruction will read that much > memory through the pointer. You need to use an "m" constraint for that. A 'register' constraint just requires the value of the address to be valid. Look at the asm output from the example code I posted. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
