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routines are now abstracted in a separate file, with separate little-endian and big-endian versions defined at compile time through the use of macros (this is similar to how the colorspace extension routines work.) This allows big-endian machines to take advantage of the same performance optimizations as little-endian machines, and it retains the performance on little-endian machines, since the conditional branch for endianness is at a very coarse-grained level.
git-svn-id: svn://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1398 632fc199-4ca6-4c93-a231-07263d6284db
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