On Wed, 2022-05-25 at 16:32 +0530, RICHU NORMAN wrote: > This is great, thank you so much!
You're welcome. > I am also looking for support regarding adding instructions for the > target > machine. That's something I've not done (my expertise is mostly in the frontends and diagnostics). With that caveat, I believe the official documentation is here: https://gcc.gnu.org/onlinedocs/gccint/Machine-Desc.html FWIW one of my colleagues wrote a series of posts about how to add an entirely new CPU to the GNU toolchain here (originally called "ggx", but now "moxie"): http://atgreen.github.io/ggx/ though that's from 2008 so might be out-of-date, and covers the whole toolchain, not just GCC, so might be overwhelming. Hope this is helpful Dave > > > > On Wed, May 25, 2022 at 4:14 PM David Malcolm <dmalc...@redhat.com> > wrote: > > > On Wed, 2022-05-25 at 10:25 +0530, RICHU NORMAN wrote: > > > Hi, > > > I am a beginner in gcc. I am trying to add an instruction to riscv- > > > gcc.It > > > would be helpful could help with a few tips . > > > > Hi Richu - welcome to GCC development. > > > > FWIW I've written a guide for new GCC contributors which you might > > find > > helpful: > > https://gcc-newbies-guide.readthedocs.io/en/latest/index.html > > > > Caveat: I'm much more familiar with the frontends/diagnostics, rather > > than the backends/RTL, so there may be a "frontend" bias in that > > guide. > > > > > 1.How to write comments to rtl or create a custom log file to log > > > comments > > > to rtl dump? > > > 2.How to run testsuite ? > > > 3.Is there a way to directly run an rtl test case? Like giving rtl > > > input > > > and checking the generated asm.(Like in the attachment which is > > > posted in > > > bugzilla[ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82815 ]) > > > Please suggest a way to run the gcc-testsuite with these cases. Pfa > > > > I wrote some notes on dealing with the testsuite, and on running > > individual cases here: > > > > > > https://gcc-newbies-guide.readthedocs.io/en/latest/working-with-the-testsuite.html > > > > Hope this is helpful; good luck > > Dave > > > > >
