Any usable SIMD implementation?

[9il via Digitalmars-d]

On Tuesday, 5 April 2016 at 08:34:32 UTC, Walter Bright wrote:
> On 4/4/2016 11:10 PM, 9il wrote:
> I still don't understand why you cannot just set '-version=xxx' 
> on the command line and then switch off that version in your 
> custom code.

I can do it, however I would like to get this information from 
compiler. Why?

1. This would help to eliminate configuration bugs.
2. This would reduce work for users and simplified user 
experience.
3. This is possible and not very hard to implement if I am not 
wrong.

Ilya