RE: RFC: Bytecode file format

[Hong Zhang]

> 8-byte word:    endianness (magic value 0x123456789abcdef0)
> byte:           word size
> byte[7]:        empty
> word:           major version
> word:           minor version
> 
> Where all word values are as big as the word size says they are.
> 
> The magic value can be something else, but it should byteswap such that if

> you read it in you can tell whether it was a big-endian write or a 
> little-endian write.

Since the magic value can tell the endian, there is really no need
for the endianness field.

Personally I don't like the word size concept. I prefer we use fixed
4-byte word. If we support multiple word size, each runtime have to
deal with several bytecode data format, 2, 4, 6, 8-byte word. I believe
the 4-byte word will be 99+% of all practical use. We should let minority
convert it, instead of asking every runtime to handle every thing.

Hong