add phobos module std.halffloat ?

[Robert Jacques]

On Wed, 19 Dec 2012 05:47:38 -0600, Iain Buclaw <ibuclaw at ubuntu.com> wrote:
> On 19 December 2012 11:30, tn <no at email.com> wrote:
>> On Wednesday, 19 December 2012 at 10:13:56 UTC, Iain Buclaw wrote:
>>> On 19 December 2012 08:55, Walter Bright <newshound2 at digitalmars.com>
>>> wrote:
>>>  On 12/19/2012 12:47 AM, Alex Rønne Petersen wrote:
>>>>  On 19-12-2012 08:35, Jacob Carlborg wrote:
>>>>>  On 2012-12-19 08:30, Walter Bright wrote:

[snip]

>> What is the difference between std.numeric.CustomFloat and this?
>>
>
> With this, there's a choice of rounding modes,  casting between float and
> integral types,  and the fact that not many people know about it?
>

*Ahem* That should be possible future support for rounding modes.  
Currently, the code paths exist but are restricted to ROUND.TONEAREST. I'm  
not sure why this is given std.math.FloatingPointControl.rounding.