[Tinyos-devel] external (nx*) types and floating point

[Vlado Handziski]

Sure, that sounds reasonable. Do we have any use cases for nx_double? MSPGCC
supports only single precision floats which take 2 bytes.

Vlado

On Mon, May 5, 2008 at 7:30 PM, David Gay <dgay42 at gmail.com> wrote:

> On Mon, May 5, 2008 at 9:28 AM, Vlado Handziski
> <handzisk at tkn.tu-berlin.de> wrote:
> > I think I lost you there. What do you understand under MCU specific
> > nx_float/nx_double definitions? How the serialization is implemented?
> Cause
> > the whole point of nx_* was to provide platform independent types, so the
> > "semantics" of the type should be the same all over, isn't it?
>
> The platform-independent rep of floating point types would be the
> standard IEEE 32 (or 64) bit floating point formats, in some standard
> bit order. The platform-specific code would convert to/from that rep
> (I can't think of any efficient, or even practical, way to write that
> code in a platform-independent way).
>
> David
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.millennium.berkeley.edu/pipermail/tinyos-devel/attachments/20080505/60e01046/attachment.htm