methods, apparatus, instructions, and logic to provide vector population counting functionality

摘要

"Methods, apparatus, instructions and logic for providing vector population counting functionality" The present invention relates to instructions and logic providing simd vector population functionality. some embodiments store in each data field a portion of n data fields of a vector register or memory vector, a plurality of data bits. In a processor, a simd instruction for a vector population count is executed, so that for that portion of the n data fields in the vector register or memory vector, the occurrences of binary values equal to each of the first one. or more predetermined binary values are counted and the counted occurrences stored in a portion of a destination register corresponding to the portion of the n data fields in the vector register or memory vector as a first one or more counts corresponding to the first one or more predetermined binary values.