[uClibc 0000845]: uClibc Floating Point Bug with all Print Functions

bugs at busybox.net bugs at busybox.net
Fri Apr 21 16:30:13 UTC 2006


The following issue has been SUBMITTED. 
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http://busybox.net/bugs/view.php?id=845 
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Reported By:                james
Assigned To:                uClibc
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Project:                    uClibc
Issue ID:                   845
Category:                   Architecture Specific
Reproducibility:            always
Severity:                   major
Priority:                   normal
Status:                     assigned
====================================================================== 
Date Submitted:             04-21-2006 09:30 PDT
Last Modified:              04-21-2006 09:30 PDT
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Summary:                    uClibc Floating Point Bug with all Print Functions
Description: 
We have identified a bug with the uClibc library used with an ARM core
processor. Floating point numbers under
http://busybox.net/bugs/view.php?id=43#11.0 with certain formating flags
do not print with printf.  The one I am using is a 6 character width and 2
digit precision on a floating point number.

For example:
ret = printf("%6.2f\n", 15.0);  /* prints " 15.00", ret = 7 */
ret = printf("%6.2f\n", 10.0);  /* prints " 1", ret = 0, should be "
10.00" 
*/
ret = printf("%6.2f\n", 5.0);  /* prints "", ret = 0, should be "  5.00"
*/

This happens with the entire family of printf (sprintf, fprintf, etc)
that uses the vfprintf library calls.

A customer of ours has also identified this problem: We have the same
problem with all powers of 10 (100.0, 1000.0, 10000.0,
....).
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Issue History 
Date Modified   Username       Field                    Change               
====================================================================== 
04-21-06 09:30  james          New Issue                                    
04-21-06 09:30  james          Status                   new => assigned     
04-21-06 09:30  james          Assigned To               => uClibc          
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