[cairo] Re: Some other bits...
bertram.felgenhauer at googlemail.com
Thu Aug 18 16:59:14 PDT 2005
On 8/18/05, Behdad Esfahbod <behdad at cs.toronto.edu> wrote:
> > There's a standard trick for this, though. If you want to guarantee
> > arithmetic (signed) right shift, you can say:
> > a = (b >> shift) | ~(-1 >> shift);
> Then you fall into another hole: it assumes 2-complete arithmetic ;).
2's complement, I think.
But it does not even work; the top bits are also added if b is positive,
giving an incorrect result.
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