Messages in this thread | | | Subject | Re: [PATCH] make jiffies wrap 5 min after boot | From | Falk Hueffner <> | Date | 16 Feb 2003 12:50:34 +0100 |
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Muli Ben-Yehuda <mulix@mulix.org> writes:
> On Sun, Feb 16, 2003 at 01:37:40AM -0500, Robert Love wrote: > > On Sat, 2003-02-15 at 21:43, William Lee Irwin III wrote: > > > > > Can I get a vote for ~0UL instead of -1UL? > > > > OK, I bite. What is the difference? Aren't both equivalent? > > I have no idea if that's what wli meant, but -1UL is only "all ones" > in a 2's complement binary representation.
No. Wraparound of unsigned types is well-defined. -1UL must be the largest possible unsigned long value, which must consist of only 1 bits (except for possible padding bits).
Of course, no machines with ones-complement (or padding bits, or integer trap representations, or any of the other ISO braindamages) exist, so this is mostly irrelevant anyway.
-- Falk - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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