I'm trying to reverse a decoding function in order to produce the function for encoding (for the curious this is a save game for a legacy adventure game wich use codes for saving).

So far I have ported the decoding function from ASM X86 to Python and it's working fine.
My problem is I'm not able to reverse the function because I don't understand what the code does with the bitwise operations. Specially the bitwise OR is like voodoo to me.

I'd like some help to simplify/understand the function and reverse it.

My code so far:

```
def load_and_decode_value(text, index, table):
  current_char = ord(text[index])
  return table[current_char]

def text_to_hex(text):
  with open("DECODE_TABLE.bin", mode='rb') as file:
    DECODE_TABLE = file.read()

  decoded = []
  val_index = 0
  text_len = len(text)

  for i in range(0, 5):

    val_0 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_1 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_next_0 = (val_0 * 2048) | (val_1 * 64)
    val_1 = (val_next_0 >> 8) & 0xFF
    decoded.append(val_1)

    if i == 4:
      break

    val_2 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_3 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_next_1 = (((val_2 * 2) | val_next_0) * 16777216) | (val_3 * 1048576)
    val_3 = (val_next_1 >> 0x18) & 0xFF
    decoded.append(val_3)

    val_4 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_next_2 = val_next_1 | (val_4 * 32768)
    val_4 = (val_next_2 >> 0x10) & 0xFF
    decoded.append(val_4)

    val_5 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_6 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_next_2 = val_next_2 | (val_5 * 1024)
    val_next_3 = val_next_2 | (val_6 * 32)
    val_6 = (val_next_3 >> 8) & 0xFF
    decoded.append(val_6)

    val_7 = load_and_decode_value(text, val_index, DECODE_TABLE)
    val_index += 1
    val_8 = (val_next_3 | val_7) & 0xFF 
    decoded.append(val_8)

  return decoded
```

The content of the DECODE_TABLE.bin file:

```
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF 00 01 02 03 04 05 06 07 08 09 FF FF FF FF FF FF FF 0A 0B 0C 0D 
0E 0F 10 11 01 12 13 01 14 15 00 16 17 18 19 1A FF 1B 1C 1D 1E 1F FF 
FF FF FF FF FF 0A 0B 0C 0D 0E 0F 10 11 01 12 13 01 14 15 00 16 17 18 
19 1A 1B FF 1C 1D 1E 1F FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF FF 
FF FF FF                                                             
```