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  1.  Home
  2. C400-L
  3. November 2003

RE: circular rotate integers

> Here's the _lrotl() & _rotl() macro definitions;
> 
> #define _lrotr(x, c) ((((unsigned long)(x)) >> ((int) ((c) & 
> 31))) | (((unsigned long)(x)) << ((int) ((32 - ((c) & 31))))))
> #define _rotr(x, c) (unsigned int) _lrotr((unsigned long) x, c)

Ooops, looks like I need to send the definitions for the 'other left' :o)

#define _lrotl(x, c) ((((unsigned long)(x)) << ((int) ((c) & 31))) | 
(((unsigned long)(x)) >> ((int) ((32 - ((c) & 31))))))

#define _rotl(x, c) (unsigned int) _lrotl((unsigned long) x, c)

[ NOTE : _lrotl is all one long line ]

--phil

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