loader: Build the preloader for ARM

[André Hentschel]

Am 04.02.2011 17:26, schrieb Marcus Meissner:
> On Fri, Feb 04, 2011 at 04:51:46PM +0100, André Hentschel wrote:
>> Am 04.02.2011 16:31, schrieb Alexandre Julliard:
>>> André Hentschel <nerv at dawncrow.de> writes:
>>>
>>>> +unsigned int wld_modulo( const unsigned int a, const Elf32_Word b )
>>>> +{
>>>> +#ifdef __ARM_EABI__
>>>> +    unsigned int i;
>>>> +    if(b > a) return a;
>>>> +    for(i = 0; i * b < a + b; i++)
>>>> +        if(i * b > a - b) return (a - i * b);
>>>> +    return 0;
>>>
>>> That's very inefficient, there are better ways...
>>>
>>
>> Thanks for having a look at it.
>> The Problem is that i also can't use '/', otherwise it wants to link to __aeabi_uidiv .
>> That leads to some Problems, so i'll try to find some better math solution and if that fails i maybe try it the assembler way...
> 
> modulo would be "%" btw,
> 
> return a%b;
> 
> but this might generate external functions too... hmm, try -Os as option?
> 
> Ciao, Marcus

% and / both lead to external dependencies here...
maybe the euclidean algorithm helps, because -Os would need ugly changes to configure i guess.

-- 

Best Regards, André Hentschel