[omniORB] CORBA::Double type corrouption issue in python omniORB

[Johnny Willemsen]

Hi,

It could be that your issue is fixed in the latest TAO version which is 
TAO 2.1.8. I merged in some changes the last months for getting TAO to 
run on the Beaglebone.

Best regards,

Johnny

On 04/19/2013 02:46 PM, Johnny Willemsen wrote:
> Hi,
>
>  >    This is a good idea. I will define an internal object class that
> works with floats and see how that goes.
>
> If you have a real mixed endian ARM target than I think there are much
> more problems than just the double, running all tests will probably show
> that.
>
> Best regards,
>
> Johnny
>
>>
>> Amit
>>
>> Sent from my iPad
>>
>> On Apr 19, 2013, at 7:21 AM, Michael Powell <mwpowellhtx at gmail.com>
>> wrote:
>>
>>> Haven't dealt much with Omni yet. A little with CORBA, mostly with WCF
>>> and custom network layers.
>>>
>>> I do work with ARM on a daily basis though. Floating point is an issue
>>> on ARM, whether it is soft, hard, or softfp. We have soft I think.
>>>
>>> Without addressing the ORB itself, could you work around it and custom
>>> marshal, say a byte array (unsigned char) from your doubles?
>>>
>>> That or possibly prefer floats to doubles. Or avoid floating point
>>> altogether if you don't need them.
>>>
>>> HTH
>>>
>>> On Fri, Apr 19, 2013 at 6:11 AM, Johnny Willemsen
>>> <jwillemsen at remedy.nl> wrote:
>>>> Hi,
>>>>
>>>> Found the needed ARM documentation on the web. Looks TAO doesn't
>>>> support the
>>>> mixed endian double on ARM. Amit, I would recommend you to run the ACE
>>>> tests/CDR_Array_Test on your target and see whether it works or not.
>>>>
>>>> Best regards,
>>>>
>>>> Johnny Willemsen
>>>> Remedy IT
>>>> http://www.theaceorb.nl
>>>>
>>>>
>>>> On 04/19/2013 10:57 AM, Duncan Grisby wrote:
>>>>>
>>>>> On Fri, 2013-04-19 at 08:57 +0200, Johnny Willemsen wrote:
>>>>>
>>>>>> I do have seen problems recently with TAO on ARM where endianess is
>>>>>> causing problems. What is the value you get on the TAO side? Have you
>>>>>> run the ACE/TAO test suite on the target?
>>>>>
>>>>>
>>>>> Some ARMs have a bizarre mixed endian double, where the 64-bit
>>>>> double is
>>>>> split into two 32-bit words in big-endian format but then the 32-bit
>>>>> words are encoded in little-endian format.
>>>>>
>>>>> omniORB has specific support for handling thes mixed endian doubles on
>>>>> ARM. I don't know if TAO does, but I expect this is the cause of your
>>>>> problem -- either you need to configure TAO to use mixed-endian
>>>>> doubles,
>>>>> or TAO needs to grow support for them.
>>>>>
>>>>> Cheers,
>>>>>
>>>>> Duncan.
>>>>
>>>>
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