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October 2009
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2009.10.07 20:40 "Re: Wrong Native Bit Order on Intel x86_64", by Edward Lam
Bob Friesenhahn wrote: >> >> In the tiff-4.0 source code, I traced the problem to line 16124 of the >> configure script (or line 327 of configure.ac), where the script >> checks for i*86* instead of i*86*|x86_64. Unless there is a good >> reason for the native bit order to be MSB-to-LSB on x86_64, I believe >> that this is a bug and needs to be corrected so that all Intel and AMD >> x86 varieties are properly identified as LSB-to-MSB architectures. > > This issue is now fixed in libtiff CVS. > > Hopefully someone will speak up if this was the wrong decision. I doubt it's the wrong decision since we're just being consistent on x86_64 with 32-bit x86 on this matter. If we're wrong here, then that means the original decision on 32-bit x86 was wrong as well. :) Having said that, it would be nice if we had a regression test of some sort that would actually test this decision. ie. that libtiff will correctly read .tiff files generated with both fill orders. Regards, -Edward