_mm256_permutex2var_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VPERMI2PD ymm, ymm, ymm
Synopsis
 _mm256_permutex2var_pd(__m256d a, __m256i idx, __m256d b);
Description
Shuffle double-precision (64-bit) floating-point elements 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