Hallo Michael, Du schriebst am Mon, 18 Nov 2013 11:25:36 +0100:
> > I.e. there's no difference, you say? Could you please keep sufficient context so even a casual reader can surmise what was meant? Thank you. So you say a single bit can be signed? > Yep. This is how binary operations work in all modern architectures. (In No. Show me an ALU that calculates with signed bits. How does it determine whether a "1" is positive or negative? > the past, there have been some machines that did have a separate sign > bit and thus there was a +0 and a -0, but this kind of arithmetic dies The "+0" vs. "-0" ambiguity stems from the time when the 2's complement representation wasn't so firmly established as nowadays yet. It is a property of thew so-called 1's complement arithmetic implementation, where the negative of a number was derived ba simply inverting it bit-wise. Thus, +0 was represented by a all-0s memory cell, but then -0 had the representation as an all-1s memory cell, although it is the same value. Note from that that the commonly used implementation of arithmetic functions and the accompanying number representation is a _convention_ _only_! There _are_ other implementations in use, and many more are conceivable. They just need different calculation units and produce (and use) different number representations. -- -- (Weitergabe von Adressdaten, Telefonnummern u.ä. ohne Zustimmung nicht gestattet, ebenso Zusendung von Werbung oder ähnlichem) ----------------------------------------------------------- Mit freundlichen Grüßen, S. Schicktanz ----------------------------------------------------------- ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ mseide-msegui-talk mailing list mseide-msegui-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mseide-msegui-talk
