[haiku-bugs] [Haiku] #7174: Decimal Floating Point support
- From: "fano" <trac@xxxxxxxxxxxx>
- Date: Fri, 28 Jan 2011 20:20:57 -0000
#7174: Decimal Floating Point support
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Reporter: fano | Owner: nobody
Type: enhancement | Status: new
Priority: normal | Milestone: R1
Component: System/POSIX | Version: R1/alpha2
Keywords: | Blocked By:
Has a Patch: 0 | Platform: All
Blocking: |
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In these days I was working (on Linux) on an application in which I have
to represent currency and seemed natural to me to use double to represent
it!
A great mistake now I know... double simply not work (that is I have 0.05
I multiply for 2 and obtain... 0.09 not 0.10!).
I have found that there is a new _Decimal type in the work and GCC say it
is included from GCC 4.2, but sadly is not compiled by default... so in
Linux it says: _Decimal32 not found! ... and I've to re-write to use
integer and divide by 100 for visualization :-(
I've tried this simple C code on Haiku and it is better:
{{{
#include <stdio.h>
int
main(void) {
_Decimal32 d = 4.0;
return 0;
}
}}}
GCC says: << decimal floating point not supported for this target >>
Better that Linux that says _Decimal32 not exist! But why is not
supported?
This support can be added? I think Decimal Floating point could be very
useful if you want precise decimal calculation...
For references:
http://gcc.gnu.org/onlinedocs/gcc/Decimal-Float.html
--
Ticket URL: <http://dev.haiku-os.org/ticket/7174>
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