GSoC 2024 ‐ Gunj Joshi

About me

Hello 👋. I am Gunj Joshi, from Banswara, Rajasthan, India. I am a pre-final year undergraduate at Indian Institute of Information Technology, Kottayam, Kerala, India. It has been an year since I started my open-source journey, and believe me, it has been a great ride! Apart from stdlib, my interests include mathematics (which might be evident from my GSoC project) and sports.

Project overview

The goals of my project included adding C implementations for various base special mathematical functions. Along with that, I also worked on adding single-precision variants for pre-existing functions. To achieve this, I followed certain reference implementations, some of which include:

• FreeBSD
• Cephes
• Boost and a few others.

The approach for developing a certain C implementation from the reference implementation to its stdlib equivalent included quite a few things, out of which some are as follows:

• Using a relevant napi function, in order to match the function signature.
  
  For instance, binomcoef, has the following signature:

double stdlib_base_binomcoef( const int64_t n, const int64_t k ) {

It takes in two 64-bit integers, and gives a number of type double as output. In order to achieve this, I worked on adding LL_D in math/base/napi/binary, which was as follows:

napi_value stdlib_math_base_napi_ll_d( napi_env env, napi_callback_info info, double (*fcn)( double, int64_t, int64_t ) )

• Replacing certain functions used in reference implementations with their stdlib equivalents. For instance, replacing scalbn in FreeBSD implementation for rempio2 by ldexp, which is the appropriate stdlib equivalent.
  

...

Project recap

TODO: add a summary of what you did.

Completed work

TODO: include a list of links to all relevant PRs along with a short description for each. For small bug fix PRs, you can group them together and describe them as, e.g., "various maintenance work".

Current state

TODO: add a summary of the current state of the project.

What remains

TODO: add a summary of what remains left to do. If there is a tracking issue, include a link to that issue.

Challenges and lessons learned

TODO: add a summary of any unexpected challenges that you faced, along with any lessons learned during the course of your project.

Conclusion

TODO: add a report summary and include any acknowledgments (e.g., shout outs to contributors/maintainers who helped out along the way, etc).