_mm_maskz_permute_pd
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPERMILPD xmm {z}, xmm, imm8
Synopsis
_mm_maskz_permute_pd(__mmask8 k, __m128d a, const int imm8);
Description
Shuffle double-precision (64-bit) floating-point elements in "a" using the control in "imm8", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
IF (imm8[0] == 0) tmp_dst[63:0] := a[63:0]; FI
IF (imm8[0] == 1) tmp_dst[63:0] := a[127:64]; FI
IF (imm8[1] == 0) tmp_dst[127:64] := a[63:0]; FI
IF (imm8[1] == 1) tmp_dst[127:64] := a[127:64]; FI
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] := 0
FI
ENDFOR
dst[MAX:128] := 0