In a big endian system, the address 0x12345678 is represented by the bytes 78 56 34 12 on a little endian system, and by 12 34 56 78 on a big endian system. In my experience, both print out, with %p, as 0x12345678. It's not really a matter of 'byte swapping', per se, but rather interpreting the bytes in the correct order for the platform. Would the above address print 0x78563412 on a big endian system with sdcc, I would likely file a bug report.
Warner On Thu, Nov 11, 2021 at 12:59 PM Bodo Wenzel <bodowen...@web.de> wrote: > Pragmatically, if there is something to check endianness, make a working > chance for all targets, or at least non-breaking for little-endian > systems. I see not much value in finding by whom or why this > little-endian-only solution was written, because for me it is a clear > error. > > The implementation-defined part of the standard targets more prefix, > number of digits, number base, or other specialties like > "segment:offset", in my eyes. Swapping bytes does not belong here… > > -Bodo > > Am 10.11.21 um 23:38 schrieb Basil Hussain: > > Hi all, > > > > Quick question: was the SDCC standard library printf() implementation > > for the %p conversion specifier written only with little-endian > > platforms (e.g. 8051) in mind? > > > > I ask because I encounter once again today an annoyance I've encountered > > before when working on big-endian target platforms such as the STM8. > > Whenever you use %p, the pointer value is formatted with the bytes in > > the wrong order. For example, a pointer with value of 0x87A1 is output > > as "0xa187". It's annoying to have to mentally transpose the bytes when > > looking at debugging output. > > > > Regards, > > Basil Hussain > > > > > > _______________________________________________ > > Sdcc-user mailing list > > Sdcc-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/sdcc-user > > > _______________________________________________ > Sdcc-user mailing list > Sdcc-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sdcc-user >
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