_mm256_permutex2var_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPERMI2Q ymm, ymm, ymm
Synopsis
_mm256_permutex2var_epi64(__m256i a, __m256i idx, __m256i b);
Description
Shuffle 64-bit integers in "a" and "b" across lanes using the corresponding selector and index in "idx", and store the results in "dst".
Operation
FOR j := 0 to 3
i := j*64
off := idx[i+1:i]*64
dst[i+63:i] := idx[i+2] ? b[off+63:off] : a[off+63:off]
ENDFOR
dst[MAX:256] := 0