[Bug gas/31964] Add directive for more efficient encoding of binary data

[jakub at redhat dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=31964

--- Comment #3 from Jakub Jelinek <jakub at redhat dot com> ---
(In reply to Nick Clifton from comment #2)
> Hi Jakub,
> 
>   Does libiberty (or some other library) have a base64 decoding function ?

I don't think so.

>   If not, I guess I will have to steal^H^H^H^H borrow some code from some 
>   other project.

I simply wrote my own, see
https://gcc.gnu.org/pipermail/gcc-patches/2024-June/655156.html
(the base64_dec_fn helper function, base64_dec array and most of
finish_base64_embed).  Uses C++ for the base64_dec array initialization, of
course it could be initialized on demand at runtime, just wanted to make it
more efficient.
Now, I don't really remember if gas does any kind of character set translation
or not, or whether say 'A' in .ascii/.string etc. routines is expected to be
'A' in gas source and is what is being written to the sections.

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