_mm_mask_i64gather_ps
Classification
AVX_ALL, Load, CPUID Test: AVX2
Header File
immintrin.h
Instruction
VGATHERQPS xmm, vm64x, xmm
Synopsis
 _mm_mask_i64gather_ps(__m128 src, float const* base_addr, __m128i vindex, __m128 mask, const int scale);
Description
Gather single-precision (32-bit) floating-point elements 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 "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 1
	i := j*32
	m := j*64
	IF mask[i+31]
		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
mask[MAX:64] := 0
dst[MAX:64] := 0