Why don't we switch to C like floating pointed arithmetic instead of automatic expansion to reals?

[Iain Buclaw via Digitalmars-d]

On 6 August 2016 at 22:12, David Nadlinger via Digitalmars-d
<digitalmars-d at puremagic.com> wrote:
> On Saturday, 6 August 2016 at 10:02:25 UTC, Iain Buclaw wrote:
>>
>> No pragmas tied to a specific architecture should be allowed in the
>> language spec, please.
>
>
> I wholeheartedly agree. However, it's not like FP optimisation pragmas would
> be specific to any particular architecture. They just describe classes of
> transformations that are allowed on top of the standard semantics.
>
> For example, whether transforming `a + (b * c)` into a single operation is
> allowed is not a question of the target architecture at all, but rather
> whether the implicit rounding after evaluating (b * c) can be skipped or
> not. While this in turn of course enables the compiler to use FMA
> instructions on x86/AVX, ARM/NEON, PPC, …, it is not architecture-specific
> at all on a conceptual level.
>

Well, you get fusedMath for free when turning on -mfma or -mfused-madd
- whatever is most relevant for the target.

Try adding -mfma here.  http://goo.gl/xsvDXM