Re: [RFC] decimal float point patch based on libdecnumber: testcase

[Daniel Jacobowitz <drow@false.org>]

On Fri, Jun 23, 2006 at 07:27:29AM +0800, Wu Zhou wrote:
> That is because they have different precision/exponent. Number 
> 1234567890123456.dd have 16 digits, its coefficient is 1234567890123456, 
> and exponent is 0, so it won't print back with an exponent.  While in the 
> case of "1.2E10dd", the coefficient is 12, exponent is 9, so it will print 
> back with an exponent. And in exponent display mode, the coefficient will 
> be normalized, in this case, to 1.2; and exponent get to 10 respectively.
> 
> For "p 1200000000000000.dd", it will return 1200000000000000. It is 
> equal to but different than 1.2E+15.  Their precison is not the same.

So they map down to different bit patterns.  How bizarre.

> Do you mean that we need to output something more close to the fact. to 
> say, "Addition/Multiple of decimal floating point is not supported right 
> now".  or something other like this.  If you want, I can do that.

No, I think what's there is fine - but add a test or two for that error
message.

-- 
Daniel Jacobowitz
CodeSourcery