_mm512_mask_shldi_epi16
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
Instruction
VPSHLDW zmm {k}, zmm, zmm, imm8
Synopsis
_mm512_mask_shldi_epi16(__m512i src, __mmask32 k, __m512i a, __m512i b, int imm8);
Description
Concatenate packed 16-bit integers in "a" and "b" producing an intermediate 32-bit result. Shift the result left by "imm8" bits, and store the upper 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 31
i := j*16
IF k[j]
tmp[31:0] := ((a[i+15:i] << 16)[31:0] | b[i+15:i]) << imm8[3:0]
dst[i+15:i] := tmp[31:16]
ELSE
dst[i+15:i] := src[i+15:i]
FI
ENDFOR
dst[MAX:512] := 0