| 摘要 |
The present invention relates to a barrel shifter for manipulating bits within computer words. The barrel shifter includes multiple multiplexer stages for rotating single and multiple words. In several embodiments, it provides a half-word alignment in a 2<n>-bit barrel shifter, rotates a single 32-bit data word or two 16-bit data words, rotates a 2<n>-bit data word or two 2<n-1>-bit data half-words, a method of operating a 2<n>-bit barrel shifter to rotate two 2<n-1>-bit data words, multiplexer stages for rotating the bits to the left or right based on control signals, such that the stages do not require 2:1 multiplexers between the first and second stages.
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