DATA PROCESSING APPARATUS AND METHOD FOR PERFORMING VECTOR SCAN OPERATION

摘要

A vector scan operation is performed to generate M data elements of a result vector, where each result data element corresponds to a combination of an additional data element with at least some of the data elements of a source vector operand V. The vector scan operation is performed using a plurality of steps, each step comprising one or more combination operations for combining data elements. At least one of the steps includes two or more combination operations performed in parallel. At least two of the steps comprise a combination operation for combining a data element with the additional data element S. This approach enables the vector scan operation to be performed in fewer steps in the case where fewer than M data elements are active, so that the vector scan operation can be performed more quickly.

主权项

1. A data processing apparatus comprising:
a vector register store configured to store vector operands comprising a plurality of data elements; processing circuitry configured to process vector operands from the vector register store; and control circuitry configured to control the processing circuitry to perform a vector scan operation on M data elements of a source vector operand V[0] to V[M−1] and at least one additional data element S, to generate M data elements of a result vector operand R[0] to R[M−1], where for N≦M and 0≦i