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Subject: Re: algorithm question

Author: Gerd Isenberg

Date: 12:31:52 02/28/06

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On February 28, 2006 at 08:04:06, Reinhard Scharnagl wrote:

>On February 28, 2006 at 07:07:23, h.g.muller wrote:
>
>>On February 28, 2006 at 02:57:37, Reinhard Scharnagl wrote:
>>
>>>
>>>When I had been working with a 0x88 structure I used to iterate by:
>>>
>>>coor = ((coor | ~0x77) + 1) & 0x77;
>
>Those days I missed to do the following (valid only in that context):
>
>((coor | ~0x77) + 1) & 0x77 ==
>( coor + ~0x77  + 1) & 0x77 ==
>(coor + (~0x77 + 1)) & 0x77 ==
>(coor + (-0x77)    ) & 0x77 ==
>(coor - 0x77) & 0x77
>
>what would have had the suggested form then.
>
>Reinhard.

Oups - and i missed that you found the solution already!

Sorry,
Gerd




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