Re: Cross-compile (i386/ARM) question

["Bogdan Marinescu" <bogdan.marinescu@...>]

OK, so my worst fears are now real :) If I don't ask too much, cold
you please elaborate a bit more on the weirdness part?

Thanks,
Bogdan

On Wed, Aug 27, 2008 at 11:36 PM, steve donovan
<steve.j.donovan@gmail.com> wrote:
> Double on ARMs can be very weird - we hit this problem!
>
> steve d.
>
> On 8/27/08, Bogdan Marinescu <bogdan.marinescu@gmail.com> wrote:
>> Hi list,
>>
>> I'm trying to compile a Lua source file on the PC (with the standard
>> luac compiler, I'm not using the cross-compile patch that was posted
>> on this list a while ago ) and then run the compiled bytecode on my
>> ARM boards. Keep in mind that:
>>
>> - i386 and ARM are both little endian
>> - and 32 bits (as I'm using the 32-bit mode on my dual core CPU).
>> - and the data types are the same
>> This almost works. Almost, as in "some parts of the code work, and
>> some don't, and I can't find a pattern for this". Lua does NOT return
>> an error on the compiled work, it just doesn't execute it properly. Of
>> course, the source code works all the time.
>> So what's left? Maybe the floating point data types have different
>> representations and/or semantics? I'm not really using floating point,
>> but the Lua's number type is the default (double), so everything works
>> in double. I'm using GCC for ARM to compile my code, without any
>> specific options for floating point code generation.
>>
>> Thanks,
>> Bogdan
>>
>