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Today's Topics:
1. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
2. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
3. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
4. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
5. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
6. [mingw] #41597: std::remquo does not yield the proper result
for the quotient (MinGW Notification List)
----------------------------------------------------------------------
Message: 1
Date: Mon, 22 Feb 2021 13:14:40 +0000
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 21:25
Last Update: 2021-02-22 13:14
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 13:14 Updated by: keith
Comment:
I've prepared the attached tentative patch, to resolve this issue; it appears
to DTRT, testing under Wine with your example values, (and a few other
multiples of 90.0, for the dividend).
I've also attached an updated copy of libmingwex.a, with the patch applied.
Please install it, in place of your existing libmingwex.a, test, and confirm
that it resolves the issue for you.
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
------------------------------
Message: 2
Date: Mon, 22 Feb 2021 15:19:39 +0200
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 23:25
Last Update: 2021-02-22 15:19
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 15:19 Updated by: yaser_elkelany
Comment:
Good best
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
------------------------------
Message: 3
Date: Mon, 22 Feb 2021 13:52:19 +0000
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 21:25
Last Update: 2021-02-22 13:52
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 13:52 Updated by: keith
Comment:
Reply To avhaecke
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
...
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
Just to clarify: I assume that your GCC-4.9.1 is not a MinGW release? I can
find no evidence of any legitimate MinGW GCC release, of that version; the only
GCC-4.9.x release, which we did publish, was GCC-4.9.3, (and I assume, given
the vintage of the remquo() implementation in libmingwex.a, that our GCC-4.9.3
release would have exhibited the same erroneous behaviour).
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
------------------------------
Message: 4
Date: Mon, 22 Feb 2021 15:51:02 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 22:25
Last Update: 2021-02-22 15:51
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 15:51 Updated by: avhaecke
Comment:
To answer Keith's question :
Yes indeed, the version GCC-4.9.1 I mentioned in the original post was not a
MinGW Release. It came (in 2014) from MinGW-build project as a binary package.
You can still find it online on source forge with MinGW-w64 project at :
https://sourceforge.net/projects/mingw-w64/files/
under :
Home / Toolchains targetting Win64 / Personal Builds / mingw-builds / 4.9.1 /
threads-posix/ seh
I do not currently have access to the installation archive and cannot tell you
more precisely which package it came from : I will be able to check next week.
Reply To keith
Reply To avhaecke
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
...
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
Just to clarify: I assume that your GCC-4.9.1 is not a MinGW release? I can
find no evidence of any legitimate MinGW GCC release, of that version; the only
GCC-4.9.x release, which we did publish, was GCC-4.9.3, (and I assume, given
the vintage of the remquo() implementation in libmingwex.a, that our GCC-4.9.3
release would have exhibited the same erroneous behaviour).
Reply To keith
Reply To avhaecke
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
...
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
Just to clarify: I assume that your GCC-4.9.1 is not a MinGW release? I can
find no evidence of any legitimate MinGW GCC release, of that version; the only
GCC-4.9.x release, which we did publish, was GCC-4.9.3, (and I assume, given
the vintage of the remquo() implementation in libmingwex.a, that our GCC-4.9.3
release would have exhibited the same erroneous behaviour).
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
------------------------------
Message: 5
Date: Mon, 22 Feb 2021 16:30:56 +0100
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 22:25
Last Update: 2021-02-22 16:30
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 16:30 Updated by: avhaecke
Comment:
Reply To keith
I've prepared the attached tentative patch, to resolve this issue; it appears
to DTRT, testing under Wine with your example values, (and a few other
multiples of 90.0, for the dividend).
I've also attached an updated copy of libmingwex.a, with the patch applied.
Please install it, in place of your existing libmingwex.a, test, and confirm
that it resolves the issue for you.
Thank you for your patch (and your support).
However, I cannot link with your new libmingwex.a library as it appears to have
the following symbols as Undefined (U) :
_impmsvcrt_realloc
_impmsvcrt_free
Those 2 symbols do not appear in the libmingwex library that came from the
installer.
As a consequence, when I try to link with the new libmingwex.a, I get the 3
following errors :
\home\keith\builds\mingw\mingw-wsl\build\mingwrt\..\..\mingwrt\mingwex\memalign.c
: 645: undefined reference to '_impmsvcrt_free'
\home\keith\builds\mingw\mingw-wsl\build\mingwrt\..\..\mingwrt\mingwex\memalign.c
: 557: undefined reference to '_impmsvcrt_realloc'
\home\keith\builds\mingw\mingw-wsl\build\mingwrt\..\..\mingwrt\mingwex\memalign.c
: 582: undefined reference to '_impmsvcrt_realloc'
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
------------------------------
Message: 6
Date: Mon, 22 Feb 2021 17:40:48 +0000
From: MinGW Notification List <[email protected]>
To: OSDN Ticket System <[email protected]>
Subject: [MinGW-Notify] [mingw] #41597: std::remquo does not yield the
proper result for the quotient
Message-ID: <[email protected]>
Content-Type: text/plain; charset=UTF-8
#41597: std::remquo does not yield the proper result for the quotient
Open Date: 2021-02-17 21:25
Last Update: 2021-02-22 17:40
URL for this Ticket:
https://osdn.net//projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
---------------------------------------------------------------------
Last Changes/Comment on this Ticket:
2021-02-22 17:40 Updated by: keith
Comment:
Reply To avhaecke
Reply To keith
I've prepared the attached tentative patch, to resolve this issue; it appears
to DTRT, testing under Wine with your example values, (and a few other
multiples of 90.0, for the dividend).
I've also attached an updated copy of libmingwex.a, with the patch applied.
Please install it, in place of your existing libmingwex.a, test, and confirm
that it resolves the issue for you.
Thank you for your patch (and your support).
However, I cannot link with your new libmingwex.a library as it appears to have
the following symbols as Undefined (U) :
_imp____msvcrt_realloc
_imp____msvcrt_free
Those 2 symbols do not appear in the libmingwex library that came from the
installer.
Okay. Then your mingwrt/w32api installation is too old; did you follow
apodtele's advice, and upgrade to GCC-9.2.0? In conjunction with that, you
should also be using up-to-date versions of the MinGW runtime, and W32API
libraries — it simply isn't practical for me to continue backporting to those
versions of the same vintage as GCC-6.3.0; the attached replacement
libmingwex.a is compatible with version 5.4.x runtime libraries, (and maybe
also 5.3.x), but probably not with anything older.
Furthermore, if you are using a mingw-get installer which suggests that
GCC-6.3.0 is the latest release, then it is still referring to the (defunct)
SourceForge FRS; please refer to this mailing-list post, for advice on ensuring
that you can continue to receive upates.
---------------------------------------------------------------------
Ticket Status:
Reporter: avhaecke
Owner: keith
Type: Issues
Status: Open [Owner assigned]
Priority: 5 - Medium
MileStone: (None)
Component: WSL
Severity: 5 - Medium
Resolution: None
---------------------------------------------------------------------
Ticket details:
Context :
This problem was encountered with gcc on MinGW in the following version :
gcc.exe (MinGW.org GCC-6.3.0-1) 6.3.0
Description :
The following code :
double numer = 90.1 ; double denom = 90 .0 ; int quot ; double result =
std::remquo(numer, denom, ") ; std::cout << "result " << result <<
std::endl ; std::cout << "quot " << quot << std::endl;should yield :
result 0.1
quot 1
As is expected from std::remquo, quot has a magnitude which should be congruent
(modulo 2 to the nth) to the magnitude of the integral quotient of x/y, n being
greater or equal than 3.
However with gcc 6.3.0, on MinGW, the above instructions yield :
result 0.1
quot 0
On another version of gcc (gcc 4.9.1 2014), the expected behavior is
encountered.
--
Ticket information of MinGW - Minimalist GNU for Windows project
MinGW - Minimalist GNU for Windows Project is hosted on OSDN
Project URL: https://osdn.net/projects/mingw/
OSDN: https://osdn.net
URL for this Ticket:
https://osdn.net/projects/mingw/ticket/41597
RSS feed for this Ticket:
https://osdn.net/ticket/ticket_rss.php?group_id=3917&tid=41597
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