_mm_mask_shldv_epi32
Classification
AVX-512, Shift, CPUID Test: AVX512_VBMI2
Header File
Instruction
VPSHLDVD xmm {k}, xmm, xmm
Synopsis
_mm_mask_shldv_epi32(__m128i a, __mmask8 k, __m128i b, __m128i c);
Description
Concatenate packed 32-bit integers in "a" and "b" producing an intermediate 64-bit result. Shift the result left by the amount specified in the corresponding element of "c", and store the upper 32-bits in "dst" using writemask "k" (elements are copied from "a" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 3
i := j*32
IF k[j]
tmp[63:0] := ((a[i+31:i] << 32)[63:0] | b[i+31:i]) << (c[i+31:i] & 31)
dst[i+31:i] := tmp[63:32]
ELSE
dst[i+31:i] := a[i+31:i]
FI
ENDFOR
dst[MAX:128] := 0