Eric Botcazou wrote: >> Jiri Gaisler has now signed the FSF copyleft (it took quite long to get >> through the procedure) and I was said that I could post the patches >> now. > > Thanks for your perseverance. > >> The patches are straightforward I think. >> 1. Adds machine description gcc-4.4.2/gcc/config/sparc/leon.md >> 2. gcc-4.4.2.ori/gcc/config/sparc/sparc.c: >> + adds leon_costs struct. >> + 4 target CPUs are added: >> sparchfleon : hard float v7 >> sparchfleonv8: hard float v8 >> sparcsfleon : soft float v7 >> sparcsfleonv8: soft float v8 >> + 1 cpu type: PROCESSOR_LEON >> that is called "leon" in sparc.md >> 3. gcc-4.4.2.ori/gcc/config/sparc/sparc.h: >> add the 4 target cpu defines >> 4. gcc-4.4.2.ori/gcc/config/sparc/sparc.md: >> define cpu "leon" and include "leon.md" >> 5. gcc-4.4.2/gcc/config/sparc/t-leon: >> makefile template for leon >> 6. gcc-4.4.2/gcc/config.gcc: >> include t-leon for sparc[sf|hf]leon[v8]. >> >> They dont interfere with current code. If I should change something, >> please let me know or maybe here is something I didnt think of... > > The patches would need to be ported to the mainline tree as they will be > merged there; we generally don't add support for new processors to branches.
Which repository can I use to generate patches against. Is there a git repository that I can use? > > The patch doesn't contain a config/sparc/leon.h file, so it will use whatever > default configuration it inherits; is that really intended? Maybe I shuould change that. Up to now I was using --with-cpu=xxx to configure to select the default cpu. I'll wait for AdaCore patches and see how you did it. > > I think we want sparc-leon to be a stand-alone target, with multiple > libraries > for V7/V8/soft-float/hard-float, so that a single compiler can generate code > for all the variants. That is to say, you configure --target=sparc-leon-elf > and you pass -mcpu=v7/-/mcpu=v8/-mhard-float/-msoft-float to the resulting > compiler to select the right variant. --with-cpu isn't appropriate for this. I could add a multilib version. The BCC toolchain from the Gaisler homepage is multilibbed and uses -mv8/-mcpu=v8 -msoft-float to select which config to use. However I also want a singlelib version to be able to compile. When createing a glibc crosscompiler, compiling 4 version of glibc makes it inpracticable. And crosscompiling user space apps I dont want the need to supply the extra switches explicitly all the time. Maybe there is a simple way to achieve both multilib and singlelib? > > It turns out that we have ported GNAT (the GNU Ada compiler) to embedded LEON > targets at AdaCore so we also have some material, mostly orthogonal to yours. > Give me a few days to port your 4.4 patches and dig out ours, and I'll post a > combined patch to serve as a basis for further discussions. > Ok, I'll wait. -- Greetings Konrad
