_mm_maskz_permutex2var_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPERMI2PD xmm {z}, xmm, xmm
Synopsis
_mm_maskz_permutex2var_pd(__mmask8 k, __m128d a, __m128i idx, __m128d b);
Description
Shuffle double-precision (64-bit) floating-point elements in "a" and "b" using the corresponding selector and index in "idx", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 1
i := j*64
off := idx[i]*64
IF k[j]
dst[i+63:i] := (idx[i+1]) ? b[off+63:off] : a[off+63:off]
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:128] := 0