_mm512_mask_i32gather_pd
Classification
AVX-512, Load, CPUID Test: AVX512F
Header File
immintrin.h
Instruction
VGATHERDPD zmm {k}, vm32y
Synopsis
 _mm512_mask_i32gather_pd(__m512d src, __mmask8 k, __m256i vindex, void const* base_addr, int scale);
Description
Gather double-precision (64-bit) floating-point elements from memory using 32-bit indices. 64-bit elements are loaded from addresses starting at "base_addr" and offset by each 32-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*64
	m := j*32
	IF k[j]
		addr := base_addr + SignExtend64(vindex[m+31:m]) * ZeroExtend64(scale) * 8
		dst[i+63:i] := MEM[addr+63:addr]
	ELSE
		dst[i+63:i] := src[i+63:i]
	FI
ENDFOR
dst[MAX:512] := 0