Re: [Sablevm-developer] problem with divisions, float, double

[Grzegorz B. P. <ga...@de...>]

Hi again,

Small update.  With help from our Debian Project Leader, Martin
Michlmayr I got the output of running BTF on an ARM machine (attached).
It looks like all DADD, DDIV, DMUL, DREM, operations involving NaN or
Infinity return wrong results.  At the end we also see that an integer
operation causes CPU to generate signal which should not be there...

I did some tests running "equivalent" C code on ARM machnes from
handhelds.org's iPAQ cluster, but everything seems to work just fine,
so I have no clue yet as to what exactly is the problem.

You might want to look at instructions.m4.c and instrucions*.c files
generated for it for the engine you're using (switch/direct/inlined).
After all it's just a plain C code so it shouldn't be anything magical
to just get it to work.  Ex. you can easily take gdb/ddd and put a
breakpoint on DADD and see what exactly it exectues.  You want to
configure --enable-debugging-features to change optimiation level from
-O2 to -O0, which will make debugging much easier.

Let me know if you have questions,

HTH

			Grzegorz B. Prokopski

-- 
Grzegorz B. Prokopski <ga...@de...>
Debian GNU/Linux      http://www.debian.org
SableVM - LGPLed JVM  http://www.sablevm.org
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