_mm256_maskz_slli_epi64
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPSLLQ ymm {z}, ymm, imm8
Synopsis
_mm256_maskz_slli_epi64(__mmask8 k, __m256i a, unsigned int imm8);
Description
Shift packed 64-bit integers in "a" left by "imm8" while shifting in zeros, and store the results in "dst" using zeromask "k" (elements are zeroed out when the corresponding mask bit is not set).
Operation
FOR j := 0 to 3
i := j*64
IF k[j]
IF imm8[7:0] > 63
dst[i+63:i] := 0
ELSE
dst[i+63:i] := ZeroExtend64(a[i+63:i] << imm8[7:0])
FI
ELSE
dst[i+63:i] := 0
FI
ENDFOR
dst[MAX:256] := 0