_mm512_mask_i64gather_epi32
Classification
Header File
Instruction
VPGATHERQD ymm {k}, vm64z
Synopsis
_mm512_mask_i64gather_epi32(__m256i src, __mmask8 k, __m512i vindex, void const* base_addr, int scale);
Description
Gather 32-bit integers from memory using 64-bit indices. 32-bit elements are loaded from addresses starting at "base_addr" and offset by each 64-bit element in "vindex" (each index is scaled by the factor in "scale"). Gathered elements are merged into "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set). "scale" should be 1, 2, 4 or 8.
Operation
FOR j := 0 to 7
i := j*32
m := j*64
IF k[j]
addr := base_addr + vindex[m+63:m] * ZeroExtend64(scale) * 8
dst[i+31:i] := MEM[addr+31:addr]
ELSE
dst[i+31:i] := src[i+31:i]
FI
ENDFOR
dst[MAX:256] := 0