[avr-libc-dev] [bugs #7667] float exception leaves R1 undefined

[Joerg Wunsch]

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/**************************************************************************/
[bugs #7667] Latest Modifications:

Changes by: 
                Joerg Wunsch <address@hidden>
'Date: 
                Tue 12/14/04 at 23:41 (Europe/Berlin)

            What     | Removed                   | Added
---------------------------------------------------------------------------
          Resolution | None                      | Fixed
         Assigned to | None                      | joerg_wunsch
              Status | Open                      | Closed


------------------ Additional Follow-up Comments ----------------------------
The suggested fix has been applied to rev 1.4 of fp_split.S,
and merged into the 1.0 branch as well.






/**************************************************************************/
[bugs #7667] Full Item Snapshot:

URL: <http://savannah.nongnu.org/bugs/?func=detailitem&item_id=7667>
Project: AVR C Runtime Library
Submitted by: 0
On: Tue 02/10/04 at 18:50

Category:  Library
Severity:  9 - Blocker
Item Group:  None
Resolution:  Fixed
Privacy:  Public
Assigned to:  joerg_wunsch
Originator Email:  address@hidden
Status:  Closed


Summary:  float exception leaves R1 undefined

Original Submission:  __subsf3 / __addsf3  leaves R1 undefined when returning 
via fp_split_nan

Follow-up Comments
------------------


-------------------------------------------------------
Date: Tue 12/14/04 at 23:41         By: Joerg Wunsch <joerg_wunsch>
The suggested fix has been applied to rev 1.4 of fp_split.S,
and merged into the 1.0 branch as well.

-------------------------------------------------------
Date: Sun 12/12/04 at 07:42         By: Joerg Wunsch <joerg_wunsch>
Bumped priority as the bug destroys the
contents of a register.

-------------------------------------------------------
Date: Mon 11/01/04 at 22:40         By: 0 <None>
The reason consists in function __fp_split (more precisely a set of
functions). Having found an invalid number, it deletes 2 bytes from a
stack and jumps on 'ret' on earlier address of return. Thus __fp_merge is 
excluded.
    Addition of the instruction `clr r1' in `fp_split.S' corrects this mistake.






File Attachments
-------------------

-------------------------------------------------------
Date: Mon 11/01/04 at 22:40  Name: avr-libc.diff  Size: 445B   By: None
Patch for `fp_split.S'.
http://savannah.nongnu.org/bugs/download.php?item_id=7667&amp;item_file_id=1827






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