loader: Build the preloader for ARM

[Peter Rosin]

Den 2011-02-04 20:36 skrev Peter Rosin:
> Den 2011-02-04 17:41 skrev André Hentschel:
>> % and / both lead to external dependencies here...
>> maybe the euclidean algorithm helps, because -Os would need ugly changes to configure i guess.
>>
> 
> Finding gcd is a bit over the top...
> 
> How about something like the following?
> 
> Cheers,
> Peter
> 
> unsigned int wld_modulo( const unsigned int a, const Elf32_Word b )
> {
> #ifdef __ARM_EABI__
> 	unsigned int r = 0;
> 	int i;
> 
> 	for (i = sizeof(a) * 8 - 1; i >= 0; --i) {
> 		r <<= 1;
> 		if (a & (1U << i))
> 			r |= 1;
> 		if (r > b)

Ooops, bug. Should be "if (r >= b)"

> 			r -= b;
> 	}
> 
> 	return r;
> ...
> 
> 

Cheers,
Peter