Tiago,

https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/
mailing2023-10 pre-Kona
https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p3018r0.pdf


On Sun, Dec 31, 2023 at 4:28 AM Tiago Freire via Std-Proposals <std-proposals@lists.isocpp.org> wrote:
Hi everyone,
My name is Tiago Freire, I'm new to this mailing list, so I apologize in advance if I have violated any rule of how this email works.

I'm interested in adding extended precision unsigned integer arithmetic to the standard, specifically:
add_carry - addition with carry bit
sub_borrow - subtraction with borrow bit
umul - multiplication with double with as output
udiv - complement of umul (i.e. division of extended precision)

If you are familiar with this you should know what I mean.
I wanted to know what the status of the work in such subject, and if there are already any existing documentation on it or someoe previously working on. I would like to get involved. Otherwise, I will follow up with a new proposal document.

Best regards,
Tiago Freire 
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