| 摘要 |
An integrated circuit device (100), comprising an input for receiving an initial data argument (D[31:0]) comprising a plurality of bits. The device also includes circuitry for providing a first shift argument (L[4:0]) indicating a number of shift positions in a first direction, the first shift argument comprising a plurality of bits, and circuitry for providing a second shift argument (R[4:0]) indicating a number of shift positions in a second direction, the second shift argument comprising a plurality of bits. The device also includes a plurality of rotate stages (ROTATE STAGE n), each comprising an input and an output. One rotate stage (ROTATE STAGE 1), in the plurality of rotate stages, is coupled to receive the initial data argument. Each rotate stage, in the plurality of rotate stages, other than the one rotate stage, is coupled to receive a data argument from an output of another one of the rotate stages in the plurality of rotate stages. Further, each rotate stage, in the plurality of rotate stages, is operable to rotate the data argument input into the corresponding rotate stage in response to less than all bits of at least one of the first and second shift arguments. At least one rotate stage, in the plurality of rotate stages, is operable to rotate the data argument input into the corresponding rotate stage in response to a sum of respective bit positions of the first and second shift arguments.
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