_mm_maskz_compress_epi64
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512F
Header File
Instruction
VPCOMPRESSQ xmm {z}, xmm
Synopsis
_mm_maskz_compress_epi64(__mmask8 k, __m128i a);
Description
Contiguously store the active 64-bit integers in "a" (those with their respective bit set in zeromask "k") to "dst", and set the remaining elements to zero.
Operation
size := 64
m := 0
FOR j := 0 to 1
i := j*64
IF k[j]
dst[m+size-1:m] := a[i+63:i]
m := m + size
FI
ENDFOR
dst[127:m] := 0
dst[MAX:128] := 0