[Bug 17979] New: Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Summary: Suspected Rounding Error
           Product: Wine
           Version: 1.0.1
          Platform: Other
        OS/Version: other
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

I am running confidence tests on some mass spectrometry software to verify that
it works the same under wine as it does under windoze.  Pretty much everything
is working with the exception of file conversion.

I'm seeing rounding errors in the text file output.  Not sure which side they
are on, but consistently, the least significant digit is '3' on windows and '2'
under ubuntu.  No other digits are involved.  Here is a sample diff:

diff compare/test.10008.10008.4.dta comparewin/test.10008.10008.4.dta
213c213
< 1163.312 84.55

---
> 1163.313 84.55

diff compare/test.10154.10154.4.dta comparewin/test.10154.10154.4.dta
592c592
< 1387.812 26.53

---
> 1387.813 26.53

diff compare/test.10208.10208.4.dta comparewin/test.10208.10208.4.dta
187c187
< 1413.062 17.90

---
> 1413.063 17.90

I am using a clean 1.0.1 with winetricks installed mfc42 and vcrun6. Could be
printf type formatting error. The trace+all file is about 2GB. I cut a section
out that shows a dive into the widechar/printf stuff that may be of interest.

Source data is a 300MB vendor binary data file and this program is the
conversion software, so I can't cut it down to make it more manageable. If
someone can give me a filter for the trace, I will supply it.

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

--- Comment #1 from Jim Rorie   2009-04-08 11:31:36 ---
Created an attachment (id=20341)
 --> (http://bugs.winehq.org/attachment.cgi?id=20341)
Trace Snippet

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

--- Comment #2 from Dmitry Timoshkov   2009-04-08 23:58:57 ---
Does native msvcrt (install with winetricks) make any difference?

Also please test with 1.1.18.

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #3 from Nikolay Sivov   2009-07-26 05:35:41 ---
Hi, Jim. Does setting msvcrt to native (as suggested) change anything?

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

--- Comment #4 from Jim Rorie   2009-07-27 09:37:11 ---
(In reply to comment #3)
> Hi, Jim. Does setting msvcrt to native (as suggested) change anything?

I just verified.  Setting msvcrt to native on under winecfg resulted in a
perfect match.  I then ran it again with msvcrt set back to wine(default) and
the rounding error reappeared.  It's consistent.

Using Native msvcrt
-----------------
diff comparewin/test.9923.9923.4.dta Compare_New_Linux/test.9923.9923.4.dta 
jfrorie@medusa:~/Projects/ApolloData$

Under Wine msvcrt
---------------------------
diff comparewin/test.9923.9923.4.dta Compare_New_Linux/test.9923.9923.4.dta
178c178
< 1200.813 427.92
---
> 1200.812 427.92

jfrorie@medusa:~/Projects/ApolloData$

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|-unknown                    |msvcrt

--- Comment #5 from Nikolay Sivov   2009-07-27 11:15:20 ---
(In reply to comment #4)
> I just verified.  Setting msvcrt to native on under winecfg resulted in a
> perfect match.  I then ran it again with msvcrt set back to wine(default) and
> the rounding error reappeared.  It's consistent.

Ok, is it true for 1.1.26?

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

--- Comment #6 from Austin English  2010-09-07 15:26:05 CDT ---
Can this program be downloaded anywhere (perhaps a demo)? Is this still an
issue in current (1.3.2 or newer) wine?

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

--- Comment #7 from Jim Rorie  2010-09-07 16:58:21 CDT ---
I no longer have access to the software to test this problem.

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Austin English  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |ABANDONED

--- Comment #8 from Austin English  2010-09-07 17:05:57 CDT ---
(In reply to comment #7)
> I no longer have access to the software to test this problem.

Since it can no longer be tested then, let's mark it abandoned.

Thanks for letting us know.

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Austin English  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |CLOSED

--- Comment #9 from Austin English  2010-09-07 17:12:15 CDT ---
Closing.

[Bug 17979] Suspected Rounding Error

http://bugs.winehq.org/show_bug.cgi?id=17979

Nikolay Sivov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|[e-mail]        |