you can obtain it with [expr $i1 ^ -1] aa

jasch==noob :)

thanks andrea, that looks good. not the bitnot external i was hoping for, but close enough. altough expr also supports the "proper" bitnot operator ~

this solution gives a 32bit result, since max ints are 32 bits in size. for my application i have to mask out the extra 16 bits since i'm actually working with shorts (16bits).

my patch looks like this: value - [expr ~ $i1] - [& 65535] - bitnot-value

and here's my abstraction:

cheers

/*j