I feel like working with embedded compilers is like working in the dark ages sometimes. I end up doing things that are like black magic to just make things work:

union {
float infloat;
uint32_t outint;
} puneit;

As long as the compiler supports C99 this is supposed to work. I think even if you are using it as a C++ compiler. There is also no way for us to get a compiler from the vendor for our embedded chips to do this the C++ 20 way:

float ieee_float(uint32_t f)
{
return std::bit_cast<float>(f);
}

I am not even sure if the compiler I am using is C++ 11 compatible.

edit: okay, it supports C++ 11