Re: [boost] [GSOC]SIMD Library

Subject: Re: [boost] [GSOC]SIMD Library
From: Cory Nelson (phrosty_at_[hidden])
Date: 2011-03-31 05:47:27

On Wed, Mar 30, 2011 at 10:31 PM, falcou <Joel.Falcou_at_[hidden]> wrote:
> On Wed, 30 Mar 2011 16:46:30 -0700, Cory Nelson <phrosty_at_[hidden]> wrote:
>
>> It would be useful if the types chose their instruction set by policy.
>>
>> template<typename Policy>
>> void go(float *f)
>> {
>> typedef vec4<float, Policy> vec;
>> ...
>> }
>>
>> void (*go_ptr)(float*) = go<x87>;
>>
>> if(supports_sse) go_ptr = go<sse2>;
>>
>> It would let us handle our own multiple-instruction-sets-in-one-binary
>> needs at whatever level we deem best.
>
> cant be easily added at this level. However, the underlying functor system
> maybe able to have you write:
>
>
> simd::functor<some_func, sse2_> f2;
> simd::functor<some_func, sse3_> f3;
>
>
> boost::function<proper prototype> current_f = has_sse3 ? f3 : f2;
>
>
> The main problem is that i am not sure it wont crap out at compile time
> due to improper intrinsic being used.

What would ever make intrinsics improper?

-- 
Cory Nelson
http://int64.org