Method and apparatus for extracting data stored in concatenated registers

摘要

A method for extracting n bits out of a data word stored in two concatenated registers each having a bit size of n bits starting with the m-th bit of the data register, m being smaller than n, comprises the following steps: The m significant bits of the first register are replaced with the m significant bits of the second register. Then, the result is stored in a register. Finally, the content of this register is rotated by m bits.