On Wednesday, 2 July 2014 at 08:52:25 UTC, Iain Buclaw via
Digitalmars-d wrote:
The crucial thing here is that the layout of float/double types
are
IEEE 754 are compatible. :)
That's nice of course, if you import/export, but hardly the only
crucial thing.
Implied correctness and warnings when assumptions break is also
important…
These behaviours you describe only affect the FP control
functions in
std.math, which are the only thing platform specific, and can
only be
written in inline assembly anyway...
It affects the backend.
It affects vectorization. (NEON is not IEEE754 AFAIK)
It affects what a conforming D compiler is allowed to do.
It affects versioning.
E.g. you can have a flags IEEE754_STRICT or IEE754_HAS_NAN etc
and use versioning that dectects the wrong compiler-mode.
