_mm_mask_shufflehi_epi16
Classification
AVX-512, Miscellaneous, CPUID Test: AVX512BW
Header File
Instruction
VPSHUFHW xmm {k}, xmm, imm8
Synopsis
_mm_mask_shufflehi_epi16(__m128i src, __mmask8 k, __m128i a, int imm8);
Description
Shuffle 16-bit integers in the high 64 bits of "a" using the control in "imm8". Store the results in the high 64 bits of "dst", with the low 64 bits being copied from from "a" to "dst", using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
tmp_dst[63:0] := a[63:0]
tmp_dst[79:64] := (a >> (imm8[1:0] * 16))[79:64]
tmp_dst[95:80] := (a >> (imm8[3:2] * 16))[79:64]
tmp_dst[111:96] := (a >> (imm8[5:4] * 16))[79:64]
tmp_dst[127:112] := (a >> (imm8[7:6] * 16))[79:64]
FOR j := 0 to 7
i := j*16
IF k[j]
dst[i+15:i] := tmp_dst[i+15:i]
ELSE
dst[i+15:i] := src[i+15:i]
FI
ENDFOR
dst[MAX:128] := 0