| 摘要 |
A data processing apparatus and method. The data processing apparatus comprising: a register data store operable to store data elements; an instruction decoder operable to decode a shift instruction; a data processor operable to perform data processing operations controlled by said instruction decoder wherein: in response to said decoded shift instruction, said data processor is operable to specify within said register data store, one or more source registers operable to store a plurality of source data elements of a first size, and one or more destination registers operable to store a corresponding plurality of resultant data elements of a second size, said second size not being equal to said first size; and to perform the following operations in parallel on said plurality of source data elements to produce said corresponding plurality of resultant data elements: shift each of said plurality of source data elements a specified number of places; form at least a part of each of said resultant data elements from information derived from at least a portion of a corresponding one of said plurality of source data elements; store said resultant data elements in said destination register.
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