Matlab 2011 and 2013 difference -JPEG encoder

I've downloaded the JPEG encoder from github: https://github.com/pornel/jpeg-compressor The encoder works in Matlab 2011 but works uncorrectly in Matlab 2013 or higher. During analyzing the code step by step in parallel in both version of Matlab I realize that the outputs for bitshift() function are different:

PutBuffer = 2.753693055057920e+14

Matlab 2011:

bitshift(PutBuffer, 8) = 7.444147426295808e+015

Matlab 2013:

bitshift(PutBuffer, 8) = 7.049454220948275e+16

Do You have any idea what is the difference?

Answer 1

[Steven Lord]

See the third row of the table in the "Functionality being removed or changed" item in the Mathematics section of the Release Notes for release R2012b for information about a change to bitshift that I believe is the cause of the behavior you're seeing.