_mm256_maskz_shuffle_i64x2
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VSHUFI64X2 ymm {z}, ymm, ymm, imm8
Synopsis
_mm256_maskz_shuffle_i64x2(__mmask8 k, __m256i a, __m256i b, const int imm8);
Description
Shuffle 128-bits (composed of 2 64-bit integers) selected by "imm8" from "a" and "b", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
tmp_dst.m128[0] := a.m128[imm8[0]]
tmp_dst.m128[1] := b.m128[imm8[1]]
FOR j := 0 to 3
i := j*64
IF k[j]
dst[i+63:i] := tmp_dst[i+63:i]
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:256] := 0