Bugfix/trac10510 #5
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mclow
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Apr 2, 2015
Bugfix/trac10510. @VemundH ; please remind me tomorrow to merge to master (assuming the tests cycle successfully) - and update the Trac report.
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See https://svn.boost.org/trac/boost/ticket/10510
This fixes a bug in the SIMD optimization of operator<.
According to the documentation on https://software.intel.com/sites/landingpage/IntrinsicsGuide/ it is safe to assume that
_mm_movemask_epi8will set the 16 most significant bits of the return value to 0:dst[MAX:16] := 0uint32_t is required in the final compare to handle
0x0000FFFF < 0xFFFFFFFF(the results of the(x - 1) ^ xtrick)