HvcallpExtendedFastHypercall

__int64 __fastcall HvcallpExtendedFastHypercall(__int64 a1, _QWORD *a2, __int64 a3){
  signed __int64 v3; 

  v3 = (unsigned __int64)(a3 + 15) >> 4;
  if( v3 > 1 )
    __asm { jmp     r9 }
  return HvcallCodeVa(a1, *a2, a2[1]);
}

Referenced by:

HvcallFastExtended
HvcallpExtendedFastHypercallWithOutput