ForthHub/discussion

Are there any Posit implementations out there?

CCurl opened this issue · 6 comments

CCurl commented

From what I have read, Posits has many advantages over Floats.

Does anyone know about any Forth implementations of it?

phreda4 commented

I don't know about posit but I am almost sure that integers are better than floating point

I only found one case where I couldn't replace them but I think I couldn't find the proper algorithm for this, this is the correct perspective textured triangle drawing.

The easy way to translate the programs is using the fixed point

The approximation of numbers to extend the range of representation does not seem to me a good idea, especially since there will always be a loss of precision, it is preferable to manage these limits of representation

CCurl commented

I am not suggesting to replace the integer operations with Posit, but for those cases where you need non-integer numbers, Posit numbers are better in many ways over floating point numbers.

phreda4 commented

Sorry, I don't think I explain myself well.
I think it is not necessary to use the floating point numbers in any case.

  • 👍1
MitchBradley commented

There are posit libraries like this one: https://gitlab.com/cerlane/SoftPosit . It would be possible to use, say CForth and replace the floating point operations in floatops.c with calls to the corresponding Posit operations.

paraplegic commented
CCurl commented

Thanks folks!