popcnt
Instruction Type I
Format
(qp) popcnt r1 = r3
Description
The number of bits in GR r3 having the value 1 is counted, and the resulting sum is placed in GR r1.
For details, see Volume 3: Instruction Set Reference of the Intel(R) Itanium(R) Architecture Software Developer's Manual . For the latest updates on the instruction set information, go to the web site.