Messages in this thread | | | Date | Fri, 26 Jan 2007 09:49:54 -0800 | From | "H. Peter Anvin" <> | Subject | Re: i386 and x86-64 bitops function prototypes differ |
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Stephane Eranian wrote: > Hello, > > I ran into compiler warnings with the perfmon code when I tried > using test() and __set_bit() on i386. > > For some reason, the i386 bitops functions use unsigned long * for > the address whereas x86-64/ia64 use void *. > > I do not quite understand why such difference? > Is this just for historical reasons? > > Thanks. >
Arguably void * is the right thing for a littleendian architecture. For bigendian architectures it unfortunately matters what the chunk size is, regardless of if the chunks are numbered in bigendian (reverse) or littleendian (forward) order.
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