std.math performance (SSE vs. real)

[H. S. Teoh via Digitalmars-d]

On Mon, Jun 30, 2014 at 09:06:26PM +0000, Chris Cain via Digitalmars-d wrote:
[...]
> I think that real should be deprecated and removed in favor of a
> library quadruple (binary128) and/or library "real" type. Plus I think
> having some form of decimal64 and decimal128 types (despite being
> non-native and slower) would be highly appreciated as well. I'm siding
> with Walter that precision is important and we should make it easy to
> get more precision at the cost of speed (of course, fast float/double
> ops should be fully supported as well).  Obviously better algorithms
> that require less precision is the ideal approach, but we shouldn't
> assume that users will want to spend time on better algorithms.
> Offering easy-to-accomplish accuracy is a good feature as long as the
> difficult-to-accomplish better accuracy with higher performance is
> also possible.
> 
> I think having even more precise types you can count on for different
> situations is better. I dunno if that will actually change, but maybe
> we could implement the library versions and see if Walter ends up
> liking that approach better.

How do you implement 80-bit reals in the library?


T

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