_mm256_mask_srav_epi64
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPSRAVQ ymm {k}, ymm, ymm
Synopsis
_mm256_mask_srav_epi64(__m256i src, __mmask8 k, __m256i a, __m256i count);
Description
Shift packed 64-bit integers in "a" right by the amount specified by the corresponding element in "count" while shifting in sign bits, and store the results in "dst" using writemask "k" (elements are copied from "src" when the corresponding mask bit is not set).
Operation
FOR j := 0 to 3
i := j*64
IF k[j]
IF count[i+63:i] < 64
dst[i+63:i] := SignExtend64(a[i+63:i] >> count[i+63:i])
ELSE
dst[i+63:i] := (a[i+63] ? 0xFFFFFFFFFFFFFFFF : 0)
FI
ELSE
dst[i+63:i] := src[i+63:i]
FI
ENDFOR
dst[MAX:256] := 0