Optimize R5G6B5 conversion.

Bug 20891368

Change-Id: I876e4dab9ab5ba7df5887d4b184e9750f9563edc
Reviewed-on: https://swiftshader-review.googlesource.com/3261
Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>
1 file changed