_mm_countbits_64
Classification
KNC, Bit Manipulation, CPUID Test: KNCNI
Header File
immintrin.h
Instruction
POPCNT r64, r64
Synopsis
 _mm_countbits_64(unsigned __int64 r1);
Description
Counts the number of set bits in 64-bit unsigned integer "r1", returning the results in "dst".
Operation
dst[63:0] := PopCount(r1[63:0])