VARIABLE SHIFTER, DECODER, AND DATA SHIFTING METHOD

摘要

A variable shifter includes: a plurality of shifters that cyclically shift input data having a plurality of bits or cyclically shifted data; and a control unit that selects a shift amount for each of the plurality of shifters in accordance with a predetermined cyclic shift amount. The number of types of the predetermined cyclic shift amount is smaller than the number of bits in the input data, each shifter selects one of a plurality of shift amounts in accordance with the predetermined cyclic shift amount, and the plurality of shift amounts have a combination of shift amounts that differ from one shifter to another.

主权项

1. A variable shifter comprising:
a plurality of shifters that cyclically shift input data having a plurality of bits or cyclically shifted data; and a control unit that selects a shift amount for each of the plurality of shifters in accordance with one of a plurality of predetermined cyclic shift amounts, wherein the number of types of the plurality of predetermined cyclic shift amounts is smaller than the number of bits in the input data, each shifter shifts the input data having a plurality of bits or the cyclically shifted data with the selected one of a plurality of shift amounts in accordance with the predetermined cyclic shift amount, and the plurality of shift amounts comprise a combination of shift amounts that differ from one shifter to another.