_mm256_mask_unpackhi_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VPUNPCKHQDQ ymm {k}, ymm, ymm
Synopsis
 _mm256_mask_unpackhi_epi64(__m256i src, __mmask8 k, __m256i a, __m256i b);
Description
Unpack and interleave 64-bit integers from the high half of each 128-bit lane in "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
DEFINE INTERLEAVE_HIGH_QWORDS(src1[127:0], src2[127:0]) {
	dst[63:0] := src1[127:64] 
	dst[127:64] := src2[127:64] 
	RETURN dst[127:0]
}
tmp_dst[127:0] := INTERLEAVE_HIGH_QWORDS(a[127:0], b[127:0])
tmp_dst[255:128] := INTERLEAVE_HIGH_QWORDS(a[255:128], b[255:128])
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