_mm_mask_unpacklo_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VUNPCKLPD xmm {k}, xmm, xmm
Synopsis
 _mm_mask_unpacklo_pd(__m128d src, __mmask8 k, __m128d a, __m128d b);
Description
Unpack and interleave double-precision (64-bit) floating-point elements 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