Re: [boost] Accelerating algorithms with SIMD - Segmented iterators and alternatives

Subject: Re: [boost] Accelerating algorithms with SIMD - Segmented iterators and alternatives
From: Mathias Gaunard (mathias.gaunard_at_[hidden])
Date: 2010-10-18 06:24:10

On 16/10/10 20:20, David Abrahams wrote:
> At Sat, 16 Oct 2010 19:01:12 +0100,
> Mathias Gaunard wrote:
>>
>> On 15/10/2010 04:48, David Abrahams wrote:
>>> At Thu, 14 Oct 2010 20:00:15 +0100,
>>> Mathias Gaunard wrote:
>>>>
>>>> On 13/10/10 18:50, David Abrahams wrote:
>>>>
>>>>> I think you mean
>>>>>
>>>>>      1 2 | 3 4 5 6 | 7 8 9 10 | 11
>>>>
>>>> What is that nonsense supposed to be?
>>>
>>> I fear this conversation is becoming uncivil.
>>
>> Sorry, I just couldn't make sense of what this is supposed to be,
>> and used bad phrasing.
>>
>> What would the value type of that range be?
>
> int

So how does that help using SIMD instructions at all?
What do the | represent for you?

>
>>
>>> That's what "if" statements are for.
>>
>> We want to avoid these.
>
> Actually, you don't need them.  This is really simple; it's just like
> processing a deque.

As I said, it isn't. Iterating all segments of a deque is done with the 
same code but at different locations.

I need different code for iterating each segment.