_mm_mask_shuffle_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VSHUFPD xmm {k}, xmm, xmm, imm8
Synopsis
_mm_mask_shuffle_pd(__m128d src, __mmask8 k, __m128d a, __m128d b, const int imm8);
Description
Shuffle double-precision (64-bit) floating-point elements using the control in "imm8", 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[63:0] := (imm8[0] == 0) ? a[63:0] : a[127:64]
tmp_dst[127:64] := (imm8[1] == 0) ? b[63:0] : b[127:64]
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