I've already written a prototype of the half-cycle trig functions. https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113152
There are two issues that need to be address. First, some operating systems provide half-cycle trig functions in their libm. The initial patch tries to use libm functions if found, but in hindsight I think gfortran should simply provide its own implementations. Second, the patch needs to be cleaned up and rigorously tested. I haven't had time to do this. If you are looking for a relatively small and well-defined project, I'll suggest looking at implementations for the new intrinsic subprograms SPLIT() and TOKENIZE(). As far as I know, no one is working on these routines. -- steve On Mon, Mar 24, 2025 at 04:45:06PM +0000, Yuao Ma wrote: > Hello GCC Community, > > I hope this message finds you well. My name is Yuao, and I’m excited to > express > my interest in the "Fortran – 2018/202x" project for Google Summer of Code. > I’m > writing to clarify the scope of this project and gather any recommendations > you > may have. > > >From the project documentation and the "What's New in 202x" resources, I > understand that “Extracting tokens from a string,” “Interoperability with C,” > and “Trig function changes” would be considered a medium-sized undertaking. > After exploring the codebase, I noticed that trigonometric functions working > in > degrees have already been implemented. I’d be very interested in continuing > with the half-revolution functionality as well as addressing the “Changes for > conformance with the new IEEE standard.” I’d love to hear your thoughts on > whether this focus is aligned with current project needs or if there are other > areas you recommend I prioritize. > > Thank you for your time and guidance. I look forward to your feedback on how I > can best contribute. > > Kind regards, > Yuao -- Steve
