Re: [Xen-devel] [PATCH RFC 04/25] Replace "/" operand with div64

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 07/12/2011 09:24, "Jan Beulich" <JBeulich@xxxxxxxx> wrote:

>>>> On 06.12.11 at 19:19, <stefano.stabellini@xxxxxxxxxxxxx> wrote:
>> ARM does not have a division operator: division has to be implemented
>> in software.
>> On x86 and ia64 div64 falls back to a do_div based implementation.
> 
> But this needs to be done carefully and correctly - there's no
> one-fits-all div64() implementation.

I'm sure gcc-arm must emit lib calls for divisions. Maybe arch/arm needs to
implement some of those if arm doesn't support even 32-bit divide. Common
lib code covers only 64-bit divide.

 -- Keir



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