Re: [Xenomai] [PATCH 0/1] armv5tej support in xenomai

[Romain Naour <romain.naour@openwide.fr>]

Le 28/12/2013 14:36, Gilles Chanteperdrix a écrit :
> On 12/28/2013 02:18 PM, Romain Naour wrote:
>> Le 28/12/2013 13:44, Gilles Chanteperdrix a écrit :
>>> On 12/28/2013 01:31 PM, Romain Naour wrote:
>>>> Hi Gilles,
>>>>
>>>> Can confirm that the armv5tej architecture is supported by xenomai ?
>>>>
>>>> There are currently some compilation errors like this one on buildroot's autobuilder:
>>>> http://autobuild.buildroot.net/results/e3b/e3b534dafb6dd7d788b0c3629ccc0b25702790f0/build-end.log
>>>>
>>>> This error is fixed by the following path.
>>> This fixes xenomai build issue, yes, but I have no idea how xenomai
>>> behaves with programs using the jazelle instruction set.
>> I don't know either.
>>> Does gcc generate jazelle instructions now?
>>>
>> I don't think so.
>> I don't know much about jazelle instructions set.
> My point being, unless I am mistaken, the J in arm5TEJ means "jazelle".
> So, what is the point of generating a compiler for this architecture if
> you do not use the corresponding instructions?
>
>
Jazelle instructions seems to be only used by a JVM, not by gcc.
So, in the current case, the cpu jazelle support is useless without a JVM.

Best regards,
Romain Naour