signed __int64 __fastcall sub_1404E7E00(_QWORD *a1, signed __int64 a2, unsigned int a3, _BYTE *a4)
{
  __int64 v4; // r10
  unsigned __int64 v5; // r11
  _QWORD *v6; // rbx
  signed __int64 result; // rax
  char v8; // cl
  char v9; // cl
  __int64 v10; // rax
  int v11; // er8
  unsigned __int64 v12; // rdx
  char *v13; // [rsp+20h] [rbp-28h]
  __int64 v14; // [rsp+28h] [rbp-20h]
  char v15[8]; // [rsp+30h] [rbp-18h]

  v4 = a3;
  v5 = a2;
  v6 = a1;
  *a4 = 0;
  result = a3 - 1;
  if ( (unsigned int)result > 7
    || (v8 = 8 * v4, (unsigned int)(8 * v4) < 0x40)
    && a2 >= (unsigned __int64)(1i64 << v8)
    && ((v9 = v8 - 1, result = -1i64 << v9, -1i64 << v9 > a2) || a2 >= 1i64 << v9) )
  {
    *a4 = 1;
  }
  else
  {
    v10 = 0i64;
    if ( a3 )
    {
      if ( *(_BYTE *)(*(_QWORD *)(v6[2] + 8i64) + 16i64) )
      {
        v11 = 0;
        do
        {
          v12 = v5 >> v11;
          v11 += 8;
          v15[v10] = v12;
          v10 = (unsigned int)(v10 + 1);
        }
        while ( (_DWORD)v10 != (_DWORD)v4 );
      }
      else
      {
        do
        {
          v15[v10] = (unsigned __int64)a2 >> (8 * ((unsigned __int8)v4 - (unsigned __int8)v10) - 8);
          v10 = (unsigned int)(v10 + 1);
        }
        while ( (_DWORD)v10 != (_DWORD)v4 );
      }
    }
    v14 = v4;
    v13 = v15;
    result = (*(__int64 (__fastcall **)(_QWORD *, char **))(*v6 + 336i64))(v6, &v13);
  }
  return result;
}