"Garrett Cooper" <[EMAIL PROTECTED]> writes: > If you really want to split hairs, ! only negates the logic value, > whereas ~ actually negates the bits. So technically, you're not > flipping 0 to make 1 and vice versa, but instead flipping 0 to make > non-zero, etc. There is a clear distinction in hardware.
He didn't say anything about flipping bits... and you're wrong, !0 is guaranteed to evaluate to 1. > The point was that !! isn't obvious at first glancing the C code. It is to an experienced C programmer. > Getting down to it I'd like to see what the compiler optimizes each > as, because I can see dumb compilers saying `!!' translates to `not, > bne => set, else set, continue', whereas `? :' could be translated to > `bne, set, else set, continue'; I'm sure gcc has moved passed these > really minute details. Never try to second-guess the compiler. DES -- Dag-Erling Smørgrav - [EMAIL PROTECTED] _______________________________________________ freebsd-hackers@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-hackers To unsubscribe, send any mail to "[EMAIL PROTECTED]"
