_mm512_maskz_permutevar_pd
Classification
AVX-512, Swizzle, CPUID Test: AVX512F
Header File
Instruction
VPERMILPD zmm {z}, zmm, zmm
Synopsis
_mm512_maskz_permutevar_pd(__mmask8 k, __m512d a, __m512i b);
Description
Shuffle double-precision (64-bit) floating-point elements in "a" within 128-bit lanes using the control in "b", and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
IF (b[1] == 0) tmp_dst[63:0] := a[63:0]; FI
IF (b[1] == 1) tmp_dst[63:0] := a[127:64]; FI
IF (b[65] == 0) tmp_dst[127:64] := a[63:0]; FI
IF (b[65] == 1) tmp_dst[127:64] := a[127:64]; FI
IF (b[129] == 0) tmp_dst[191:128] := a[191:128]; FI
IF (b[129] == 1) tmp_dst[191:128] := a[255:192]; FI
IF (b[193] == 0) tmp_dst[255:192] := a[191:128]; FI
IF (b[193] == 1) tmp_dst[255:192] := a[255:192]; FI
IF (b[257] == 0) tmp_dst[319:256] := a[319:256]; FI
IF (b[257] == 1) tmp_dst[319:256] := a[383:320]; FI
IF (b[321] == 0) tmp_dst[383:320] := a[319:256]; FI
IF (b[321] == 1) tmp_dst[383:320] := a[383:320]; FI
IF (b[385] == 0) tmp_dst[447:384] := a[447:384]; FI
IF (b[385] == 1) tmp_dst[447:384] := a[511:448]; FI
IF (b[449] == 0) tmp_dst[511:448] := a[447:384]; FI
IF (b[449] == 1) tmp_dst[511:448] := a[511:448]; FI
FOR j := 0 to 7
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:512] := 0