_mm256_mask_shldv_epi16
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
immintrin.h
Instruction
VPSHLDVW ymm {k}, ymm, ymm
Synopsis
 _mm256_mask_shldv_epi16(__m256i a, __mmask16 k, __m256i b, __m256i c);
Description
Concatenate packed 16-bit integers in "a" and "b" producing an intermediate 32-bit result. Shift the result left by the amount specified in the corresponding element of "c", and store the upper 16-bits in "dst" using writemask "k" (elements are copied from "a" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 15
	i := j*16
	IF k[j]
		tmp[31:0] := ((a[i+15:i] << 16)[31:0] | b[i+15:i]) << (c[i+15:i] & 15)
		dst[i+15:i] := tmp[31:16]
	ELSE
		dst[i+15:i] := a[i+15:i]
	FI
ENDFOR
dst[MAX:256] := 0