[fpc-pascal] Currency and ABS(-674.59)

Sven Barth pascaldragon at googlemail.com
Tue Mar 6 13:56:25 CET 2012

Am 06.03.2012 13:28, schrieb michael.vancanneyt at wisa.be:
> On Tue, 6 Mar 2012, Jonas Maebe wrote:
>> On 06 Mar 2012, at 13:05, Michael.VanCanneyt at Wisa.be wrote:
>>> On Tue, 6 Mar 2012, Zaher Dirkey wrote:
>>>> On Mon, Mar 5, 2012 at 12:22 AM, Jonas Maebe
>>>> <jonas.maebe at elis.ugent.be>wrote:
>>>>> This particular problem could obviously be resolved by adding a
>>>>> currency-specific version of abs()
>>>> Can i ask to add overload function for ABS(Currency) be a feature
>>>> request
>>>> in FPC?
>>> Yes, please add an entry in the bugtracker.
>> Note that this requires compiler patching, because abs() is internal
>> (it can be used in constant expressions). I would personally argue to
>> do away entirely with the "treat currency as a floating point type on
>> i386 so it can use the 80x87", and instead map it implementation-wise
>> to int64 like on all other platforms. You may lose a bit of
>> performance, but you'll gain consistency. And you won't need hacks
>> like this (which, as mentioned before, only solves one particular
>> use-case, and so I'm not very much in favour of doing this).
> As far as I know, Currency is always a scaled int64, and didn't
> interpret the
> request as a request to change that. I missed probably part of the
> argumentation but on the face of it, having a ABS(Currency) seems like a
> reasonable request.

No, Currency is based on Extended on i386 and x86_64 (except win64!).


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