start on SIMD documentation

[Andrei Alexandrescu]

On 1/13/12 2:41 PM, Walter Bright wrote:
> On 1/13/2012 12:27 PM, Peter Alexander wrote:
>> On 13/01/12 8:02 PM, Mehrdad wrote:
>>> Er... is there any reason why we're using such a cryptic PXOR value
>>> instead of operator overloading?
>>
>> I imagine Walter will add the operator overloads later.
>
> Right. simd() is just the bottom layer building block. It's a compiler
> intrinsic, and I don't want to make every overload a compiler intrinsic.

People will want to pass a variable for op. Would that work?

Andrei