start on SIMD documentation

[Walter Bright]

On 1/13/2012 3:51 PM, Andrei Alexandrescu wrote:
> On 1/13/12 4:57 PM, Walter Bright wrote:
>> On 1/13/2012 2:31 PM, Andrei Alexandrescu wrote:
>>> People will want to pass a variable for op. Would that work?
>>
>> It'll currently fail miserably - it has to be a constant. Otherwise, we
>> have runtime code generation. While not impossible, it is a large
>> increase in scope.
>
> Then probably the operation should be simd!opcode(arguments). If a function is
> intrinsic it shouldn't have special syntactic rights.

You're right, I'm just not too thrilled about generating hundreds of template 
instantiations.