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Scott D Phillips authored
A later patch will make use of this in other places. Also, remove dependency on undefined behavior of left-shifting a signed value. v2: - move function into a separate header (Chris) v3: (by Ken) Add new header to the various build systems. Reviewed-by: Jordan Justen <jordan.l.justen@intel.com> Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
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