_mm_mask_unpacklo_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPUNPCKLQDQ xmm {k}, xmm, xmm
Synopsis
_mm_mask_unpacklo_epi64(__m128i src, __mmask8 k, __m128i a, __m128i b);
Description
Unpack and interleave 64-bit integers from the low half of "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_QWORDS(src1[127:0], src2[127:0]) {
dst[63:0] := src1[63:0]
dst[127:64] := src2[63:0]
RETURN dst[127:0]
}
tmp_dst[127:0] := INTERLEAVE_QWORDS(a[127:0], b[127:0])
FOR j := 0 to 1
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:128] := 0