_mm256_popcnt_epi8
Classification
AVX-512, Bit Manipulation, CPUID Test: AVX512_BITALG
Header File
Instruction
VPOPCNTB ymm, ymm
Synopsis
_mm256_popcnt_epi8(__m256i a);
Description
Count the number of logical 1 bits in packed 8-bit integers in "a", and store the results in "dst".
Operation
DEFINE POPCNT(a) {
count := 0
DO WHILE a > 0
count += a[0]
a >>= 1
OD
RETURN count
}
FOR j := 0 to 31
i := j*8
dst[i+7:i] := POPCNT(a[i+7:i])
ENDFOR
dst[MAX:256] := 0