Re: [PATCH] Fix do_div() for all architectures

[Andrea Arcangeli]

On Thu, Jul 10, 2003 at 08:40:19AM -0700, Richard Henderson wrote:
> On Tue, Jul 08, 2003 at 08:27:26PM +0200, Bernardo Innocenti wrote:
> > +extern uint32_t __div64_32(uint64_t *dividend, uint32_t divisor)
> > __attribute_pure__;
> ...
> > +		__rem = __div64_32(&(n), __base);	\
> 
> The pure declaration is very incorrect.  You're writing to N.

now pure sounds more reasonable, I wondered how could gcc keep track of
the stuff pointed by the parameters (especially if this stuff points to
other stuff etc.. ;). So only the pointer passed as parameter can
change, not the memory pointed by the pointer as in this case.

Andrea