Does dmd have SSE intrinsics?

[Christopher Wright]

Robert Jacques wrote:
> On Tue, 22 Sep 2009 07:09:09 -0400, bearophile 
> <bearophileHUGS at lycos.com> wrote:
>> Robert Jacques:
> [snip]
>>> Also, another issue for game/graphic/robotic programmers is the 
>>> ability to
>>> return fixed length arrays from functions. Though struct wrappers
>>> mitigates this.
>>
>> Why doesn't D allow to return fixed-sized arrays from functions? It's 
>> a basic feature that I can find useful in many situations, it looks 
>> more useful than most of the last features implemented in D2.
>>
>> Bye,
>> bearophile
> 
> Well, fixed length arrays are an implicit/explicit pointer to some 
> (stack/heap) allocated memory. So returning a fixed length array usually 
> means returning a pointer to now invalid stack memory. Allowing 
> fixed-length arrays to be returned by value would be nice, but basically 
> means the compiler is wrapping the array in a struct, which is easy 
> enough to do yourself. Using wrappers also avoids the breaking the 
> logical semantics of arrays (i.e. pass by reference).

You could ease the restriction by disallowing implicit conversion from 
static to dynamic arrays in certain situations. A function returning a 
dynamic array cannot return a static array; you cannot assign the return 
value of a function returning a static array to a dynamic array.

Or in those cases, put the static array on the heap.