_mm256_mask_shuffle_i64x2
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VSHUFI64X2 ymm {k}, ymm, ymm, imm8
Synopsis
 _mm256_mask_shuffle_i64x2(__m256i src, __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 writemask "k" (elements are copied from "src" 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] := src[i+63:i]
	FI
ENDFOR
dst[MAX:256] := 0