GCC has builtin support for decimal floats: https://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html
There are also library implementations floating around, some of them are mentioned in this thread: https://discourse.llvm.org/t/rfc-decimal-floating-point-supp...
decnumber has also rust wrappers if you are so inclined
https://github.com/python/cpython/blob/main/Lib/_pydecimal.p...
Cool, didn't know that gcc had built-in support. But is it really as incomplete as it says there?
One of the most elementary requirements of IEEE754 is:
> A programming environment conforms to this standard, in a particular radix, by implementing one or more of the basic formats of that radix as both a supported arithmetic format and a supported interchange format.
(Section 3.1.2)
While you could argue that you may configure Decimals context parameters to match those of some IEEE754 format and thus claim conformance as arithmetic format, Python has absolutely no support for the specified interchange formats.
To be honest, seeing this I'm bit befuddled on why closer conformance with IEEE754 is not sought. Quick search found e.g. this issue report on adding IEEE754 parametrized context, which is a trivial patch, and it has been just sitting there for 10 years: https://github.com/python/cpython/issues/53032
Adding code to import/export BID/DPD formats, while maybe not as trivial, seems still comparatively small task and would improve interoperability significantly imho.
