Implement the "unum" representation in D ?

[Timon Gehr via Digitalmars-d]

On 09/16/2015 10:46 AM, deadalnix wrote:
> On Saturday, 11 July 2015 at 18:16:22 UTC, Timon Gehr wrote:
>> On 07/11/2015 05:07 PM, Andrei Alexandrescu wrote:
>>> On 7/10/15 11:02 PM, Nick B wrote:
>>>> John Gustafson book is now out:
>>>>
>>>> It can be found here:
>>>>
>>>> http://www.amazon.com/End-Error-Computing-Chapman-Computational/dp/1482239868/ref=sr_1_1?s=books&ie=UTF8&qid=1436582956&sr=1-1&keywords=John+Gustafson&pebp=1436583212284&perid=093TDC82KFP9Y4S5PXPY
>>>>
>>>>
>>>
>>> Very interesting, I'll read it. Thanks! -- Andrei
>>>
>>
>> I think Walter should read chapter 5.
>
> What is this chapter about ?

Relevant quote: "Programmers and users were never given visibility or 
control of when a value was promoted to “double extended precision” 
(80-bit or higher) format, unless they wrote assembly language; it just 
happened automatically, opportunistically, and unpredictably. Confusion 
caused by different results outweighed the advantage of reduced 
rounding-overflow-underflow problems, and now coprocessors must dumb 
down their results to mimic systems that have no such extra scratchpad 
capability."