_mm_srai_pi16
Classification
MMX, Shift, CPUID Test: MMX
Header File
Instruction
PSRAW mm, imm8
Synopsis
_mm_srai_pi16(__m64 a, int imm8);
Description
Shift packed 16-bit integers in "a" right by "imm8" while shifting in sign bits, and store the results in "dst".
Operation
FOR j := 0 to 3
i := j*16
IF imm8[7:0] > 15
dst[i+15:i] := (a[i+15] ? 0xFFFF : 0x0)
ELSE
dst[i+15:i] := SignExtend16(a[i+15:i] >> imm8[7:0])
FI
ENDFOR