On Thursday 03 January 2008, Christian Convey wrote: > On Jan 2, 2008 8:54 PM, Christian Convey <[EMAIL PROTECTED]> wrote: > > On Jan 2, 2008 10:23 AM, Alexander Neundorf <[EMAIL PROTECTED]> > > wrote: [snip] > > > > > Ok. So you have one build tree, and everything's built in this tree, > > > both for the PPC and for the SPEs, and you run make once and get > > > everything ? > > > > Yes. You typically have one directory for you SPE source code, and > > one directory for your PPC source code. > > > > You set a few Make variables to tell IBM's Make include file which > > code is PPC vs. SPE. It more or less does the rest. > > > > > Is this the typical setup or do you typically have a "project" for the > > > PPC stuff and a separate project/separate developers for the SPE stuff > > > ? > > > > I'm not sure what the common practices is in this regard. My guess is > > that you have a single project for the whole deal most often. > > > > On the other hand, there's nothing stopping people from developing SPE > > and/or PPC code libraries, that are sometimes made part of larger > > projects. So in those cases I suppose there would be subprojects. > > > > > This is indeed cross compiling, or at least building software with one > > > language for different CPUs. > > > > Correct. Although cross-compiling is possible, my guess is that most > > application developers just invoke a PPC/SPE native compiler that's > > hosted on their Cell system.
So there is only one compiler which works for both architectures ? > > For example, in my case, I edit my > > source files on my Ubuntu box, but they're shared via NFS. I SSH into > > my Playstation and tell it to compile those files. > > > > I suspect that people developing kernels for the Cell use a > > cross-compiler, but I can't really say for sure. > > > > > Is it actually possible to create executables for the SPEs (if yes, can > > > you just run them from the shell ?) or do you create some kind of > > > modules/libs which are then uploaded to the SPEs by the PPC ? > > > > There are a few ways to do it. You can link SPE object code (they > > call it an SPE program, but I think it's probably just a bunch of > > subroutines) into the binary image of a PPC program. The Cell SDK > > knows how to hunt down the SPE code within the PPC program's binary > > image, transfer it over to an SPE, and start it running. > > > > It may be possible to have a native SPE program with no PPC code in it > > at all, but I kind of doubt it. Hmm, this sounds quite ... interesting. Can you put a simple (but complete) hello-world kind of example somewhere ? Alex _______________________________________________ CMake mailing list [email protected] http://www.cmake.org/mailman/listinfo/cmake
