_mm_mask_shrdi_epi16
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
immintrin.h
Instruction
VPSHRDW xmm {k}, xmm, xmm, imm8
Synopsis
 _mm_mask_shrdi_epi16(__m128i src, __mmask8 k, __m128i a, __m128i b, int imm8);
Description
Concatenate packed 16-bit integers in "b" and "a" producing an intermediate 32-bit result. Shift the result right by "imm8" bits, and store the lower 16-bits in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 7
	i := j*16
	IF k[j]
		dst[i+15:i] := ((b[i+15:i] << 16)[31:0] | a[i+15:i]) >> imm8[3:0]
	ELSE
		dst[i+15:i] := src[i+15:i]
	FI
ENDFOR
dst[MAX:128] := 0