[oe] powerpc-g++ 4.2.4 problem casting long long to double

[Khem Raj]

On Fri, May 21, 2010 at 6:40 AM, Vitus Jensen <vjensen at gmx.de> wrote:
> On Fri, 21 May 2010, Vitus Jensen wrote:
>
>> On Fri, 21 May 2010, Vitus Jensen wrote:
>>
>>>  On Wed, 19 May 2010, Koen Kooi wrote:
>>> >   On 19-05-10 17:46, Vitus Jensen wrote:
>>> > >   On Wed, 19 May 2010, Vitus Jensen wrote:
>>> > > >   On Wed, 19 May 2010, Gary Thomas wrote:
>>> > > > >    On 05/19/2010 03:38 AM, Vitus Jensen wrote:
>>
>> ...
>>>
>>> > >   So currently .dev should be unbuildable for ppc users?  Without
>>> > >   selecting a non-default compiler that is.
>>> > >   I thought I pinned powerpc at 4.1.1, but it turns out that it was
>>> > > only
>>> >   for ppc405:
>>> > >   ANGSTROM_GCC_VERSION_ppc405         ?= "4.1.1"
>>> > >   Feel free to send patches to add that for other ppc platforms.
>>>
>>>  I'd loved to but it should be a usable version for ppc603e.  We have
>>> used
>>>  ELDK gcc 3.3.3 in the past so that version would be a known good one.
>>>
>>>  [stable/2009]
>>>  4.2.4  wrong result
>>>  4.1.1  wrong result (see first posting)
>>>  3.3.3  doesn't compile, obstack macro problem
>>>  3.3.4  doesn't compile, signal.h stack_t problem
>>>
>>>  [org.openembedded.dev]
>>>  4.3.3  doesn't compile
>>>  4.1.1  doesn't compile
>>>  4.2.4  doesn't compile, libstdc++ problem
>>>
>>>  All compilations in the .dev branch used MACHINE=n1200, in stable I used
>>>  our bluepro.  Always a clean build of meta-toolchain.  I know that there
>>>  are currently problems in .dev so I will wait/monitor the list and try
>>> to
>>>  get 3.3.3 and something newer than 4.3.3. to compile.
>>
>> Faster than thought: 4.4.4 compiles for n1200 (ppc603e) on .dev and
>> produces correct output.  (double)(long long)10 equals 10.0.
>
> Only at -O2 and -O3, at those levels the internal function __floatdidf isn't
> called (previously it was only -O3).

I dont think thats the case. It always generates the call to __floatdidf

At -O1 and below it is called and
> still produces incorrect results :-( Oh well, I give up for now.
>

All I have to test is qemu running OE/ppc603e. So i tried this test on
qemu/uclibc and it seems to
work for me at O1/O2/O3 using gcc 4.4.4 and minimal-uclibc distro. I
would also try with eglibc
but I need to build it.

> Vitus
>
> --
> Vitus Jensen, Hannover, Germany, Universe (current)
> pgp public key available from keyservers
>
> _______________________________________________
> Openembedded-devel mailing list
> Openembedded-devel at lists.openembedded.org
> http://lists.linuxtogo.org/cgi-bin/mailman/listinfo/openembedded-devel
>