On Sunday, 8 July 2018 at 19:07:57 UTC, Random D user wrote:
>
> In my experience, you can only get the real benefits out of SIMD if you carefully handcraft your hot loops to fully use it. Sprinkling some SIMD here and there with a SIMD vector type, doesn't really seem to yield big benefits.
>

I agree. That's why it's useful to have a (stable) syntax for such instruction like PMADDWD that can't be described with just operator overloading.