_mm_mask_i32gather_epi32
Classification
AVX_ALL, Load, CPUID Test: AVX2
Header File
immintrin.h
Instruction
VPGATHERDD xmm, vm32x, xmm
Synopsis
 _mm_mask_i32gather_epi32(__m128i src, int const* base_addr, __m128i vindex, __m128i mask, const int scale);
Description
Gather 32-bit integers from memory using 32-bit indices. 32-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 "mask" (elements are copied from "src" when the highest bit is not set in the corresponding element). "scale" should be 1, 2, 4 or 8.
Operation
FOR j := 0 to 3
	i := j*32
	m := j*32
	IF mask[i+31]
		addr := base_addr + SignExtend64(vindex[m+31:m]) * ZeroExtend64(scale) * 8
		dst[i+31:i] := MEM[addr+31:addr]
	ELSE
		dst[i+31:i] := src[i+31:i]
	FI
ENDFOR
mask[MAX:128] := 0
dst[MAX:128] := 0