[kaffe] Re: "PS2" Patches to Kaffe
dylans at xs4all.nl
Mon Jul 8 14:19:09 PDT 2002
Kevin D. Kissell wrote:
> Some more unsolicited notes and comment (I think it would be
> a really good idea if I could be put on the kaffe developers
> mailing list, either as kevink at mips.com or kevink at paralogos.com,
> just let me know as whom I should be posting).
> I have a slight disagreement with Dylan's patch,
> though the effect should be pretty much the same.
> In his last posted patch, we have:
> *** kaffe-1.0.7-rc1/config/mips/mips.c Fri Oct 15 03:38:46 1999
> --- kaffe-1.0.7-rc1-ps2/config/mips/mips.c Mon Jun 17 00:59:46 2002
> *** 19,25 ****
> --- 19,31 ----
> #include "object.h"
> #include "support.h"
> #include "../../kaffe/kaffevm/thread.h"
> + #include "common.h"
> + #ifdef PS2LINUX
> + # include "jit.h"
> + int maxArgs;
> + int isStatic;
> + #endif
> I ran into this problem myself, but noted that in fact
> the contents of mips.c is only needed if one has a JIT.
> I was able to build and run a interpreter-only kaffe
> by making the following change:
> *** config/mips/linux/md.c.dist Fri Jul 5 14:46:33 2002
> --- config/mips/linux/md.c Fri Jul 5 14:46:49 2002
> *** 9,12 ****
> --- 9,14 ----
> * of this file.
> + #if defined(TRANSLATOR)
> #include "mips/mips.c"
> + #endif
> Which struck me as being a better solution,
> particuarly for memory-starved environments.
I already had the feeling some bitrot was going on here
but since I'm still trying to understand how the kaffe
code fits together, this was just a quick hack to get
> So with that modification, I applied Dylan's
> patches both my MIPS Malta 2.4.18 platform and
> my PS2 (actually, I had independently done most
> of them, and thank Dylan for having attacked the
> software-floating-double hack, which was the last
> thing I ran up against before setting the problem
> aside). On the PS2, things build, and many things
> run. As Dylan may recall, I was working on fixing
> the FPU emulation for the PS2 kernel, and I have
> that *partly* working. If I do a default build,
> the jit3 code seems to be active, and it is generating
> a fair amount of double-precision FPU instructions
> that are being fed to the emulator. The output of
> a "make check" looks as follows:
I was wondering about this part of my patch, would this go
away when a FPU emulator is present?
I also have 5 failures left for the interpreter, they
all seem to come back to the difference between 0.0 and -0.0 and
Inf/-Inf. Does the FPU emulator know the difference between these
values? Also note that one of Float tests ( don't remember which )
is acually a Float/Double test that fails on the Double part....
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