_mm_srai_epi64
Classification
AVX-512, Shift, CPUID Test: AVX512F
Header File
Instruction
VPSRAQ xmm, xmm, imm8
Synopsis
_mm_srai_epi64(__m128i a, unsigned int imm8);
Description
Shift packed 64-bit integers in "a" right by "imm8" while shifting in sign bits, and store the results in "dst".
Operation
FOR j := 0 to 1
i := j*64
IF imm8[7:0] > 63
dst[i+63:i] := (a[i+63] ? 0xFFFFFFFFFFFFFFFF : 0x0)
ELSE
dst[i+63:i] := SignExtend64(a[i+63:i] >> imm8[7:0])
FI
ENDFOR
dst[MAX:128] := 0