IovpAdvanceStackDownwards

__int64 __fastcall IovpAdvanceStackDownwards(
        __int64 a1,
        char a2,
        __int64 a3,
        __int64 a4,
        int a5,
        int a6,
        int a7,
        _QWORD *a8){
  unsigned __int8 *v10; 
  int v11; 
  __int64 v12; 
  __int64 v13; 
  unsigned __int8 *v14; 
  unsigned __int8 *v15; 
  _QWORD *v16; 
  __int64 v17; 
  __int64 result; 
  __int64 v19; 
  unsigned __int8 *v21; 
  v10 = (unsigned __int8 *)(120i64 * a2 + a1 - 120);
  v21 = v10;
  if( !*v10 && a7 )
  {
    memset((INT64)v10, 0i64);
    *((_QWORD *)v10 + 4) = a3;
    *((_QWORD *)v10 + 3) = v10 + 16;
    *((_QWORD *)v10 + 2) = v10 + 16;
  }
  v11 = 0;
  if( a4 )
  {
    if( a5 <= 0 )
    {
      v13 = *((_QWORD *)v10 + 1);
      v12 = 0i64;
      v15 = 0i64;
      v14 = 0i64;
    }
    else
    {
      v13 = *(_QWORD *)&v10[120 * a5 + 8];
      v12 = *(_QWORD *)&v10[120 * a5 + 40];
      *((_QWORD *)v10 + 1) = v13;
      v15 = &v10[120 * a5 + 48];
      v14 = &v10[120 * a5 + 56];
      v11 = *(_DWORD *)&v10[120 * a5 + 4] & 0x10000000;
      *((_DWORD *)v10 + 1) |= v11;
    }
  }
  else
  {
    v12 = 0i64;
    v13 = 0i64;
    v14 = 0i64;
    v15 = 0i64;
  }
  if( a5 > 1 )
  {
    v16 = v10 + 16;
    v19 = (unsigned int)(a5 - 1);
    v17 = a3;
    do
    {
      v16 += 15;
      v17 += 72i64;
      memset((INT64)(v16 - 2), 0i64);
      v16[1] = v16;
      *v16 = v16;
      *((_BYTE *)v16 - 16) = 1;
      v16[2] = v17;
      *(v16 - 1) = v13;
      v16[4] = *(_QWORD *)v15;
      v16[5] = *(_QWORD *)v14;
      v16[3] = v12;
      *((_DWORD *)v16 - 3) |= v11 | 0x800000;
      --v19;
    }
    while( v19 );
    v10 = v21;
  }
  *a8 = v10;
  if( !a7 )
    return *v10;
  if( a6 )
    *((_QWORD *)v10 + 1) = v10;
  result = *v10;
  *v10 = 1;
  return result;
}

Referenced by: