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Groups > comp.lang.c > #124657

Re: UB in asm

From Keith Thompson <kst-u@mib.org>
Newsgroups comp.lang.c
Subject Re: UB in asm
Date 2017-12-24 13:35 -0800
Organization None to speak of
Message-ID <ln608vhkqp.fsf@kst-u.example.com> (permalink)
References (3 earlier) <p1nmfh$4v9$1@news.xmission.com> <Q9N%B.75769$oi6.71523@fx40.am4> <p1odeh$f2h$1@dont-email.me> <AgP%B.88960$uS5.19755@fx45.am4> <p1p4fk$74e$1@news.albasani.net>

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Johannes Bauer <dfnsonfsduifb@gmx.de> writes:
> On 24.12.2017 15:58, bartc wrote:
>>> Several x86 opcodes have UB for some inputs.
>>>
>>> For example, BSF and BSR ("If the content source operand is 0, the
>>> content of the destination operand is undefined.")
>> 
>> So the result is undefined, that's all?
>
> Just like with any UB in a C program: That's all.

No, if I understand the description of the x86 instructions correctly,
there's a big difference.

BSF and BSR are "Bit Scan Forward" and "Bit Scan Reverse", respectively.
BSF scans the source operand for the least significant 1 bit and stores
its index in the destination.  If there is no 1 bit in the source
operand value, the ZF flag is set and the value stored in the
destination is undefined.  As far as I can tell, no other side effects
are permitted to occur (assuming the source is valid).  The destination
will contain *some* bit pattern; it's just not specified what that bit
pattern will be.

In C, "undefined behavior" means that the standard places no
requirements on the behavior, not just that some value is undefined.
For example, signed integer overflow might wrap around, it might
saturate, it might terminate your program, or it might melt your CPU
(the latter is unlikely but is permitted by the standard).

-- 
Keith Thompson (The_Other_Keith) kst-u@mib.org  <http://www.ghoti.net/~kst>
Working, but not speaking, for JetHead Development, Inc.
"We must do something.  This is something.  Therefore, we must do this."
    -- Antony Jay and Jonathan Lynn, "Yes Minister"

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Thread

Re: What every compiler writer should know about programmersWhat every compiler writer should know about programmers gazelle@shell.xmission.com (Kenny McCormack) - 2017-12-24 07:54 +0000
  Re: What every compiler writer should know about programmersWhat every compiler writer should know about programmers bartc <bc@freeuk.com> - 2017-12-24 12:34 +0000
    Re: What every compiler writer should know about programmersWhat every compiler writer should know about programmers Melzzzzz <Melzzzzz@zzzzz.com> - 2017-12-24 12:44 +0000
    Re: UB in asm Noob <root@127.0.0.1> - 2017-12-24 15:26 +0100
      Re: UB in asm bartc <bc@freeuk.com> - 2017-12-24 14:58 +0000
        Re: UB in asm Johannes Bauer <dfnsonfsduifb@gmx.de> - 2017-12-24 21:59 +0100
          Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 13:35 -0800
            Re: UB in asm Robert Wessel <robertwessel2@yahoo.com> - 2017-12-24 16:10 -0600
            Re: UB in asm Johannes Bauer <dfnsonfsduifb@gmx.de> - 2018-01-02 12:06 +0100
              Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2018-01-02 08:03 -0500
                Re: UB in asm supercat@casperkitty.com - 2018-01-02 08:53 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2018-01-02 09:33 -0800
                Re: UB in asm supercat@casperkitty.com - 2018-01-02 09:53 -0800
                Re: UB in asm scott@slp53.sl.home (Scott Lurndal) - 2018-01-02 19:31 +0000
              Re: UB in asm Keith Thompson <kst-u@mib.org> - 2018-01-02 09:26 -0800
                Re: UB in asm Johannes Bauer <dfnsonfsduifb@gmx.de> - 2018-01-04 10:56 +0100
                Re: UB in asm James Kuyper <jameskuyper@verizon.net> - 2018-01-04 05:19 -0500
                Re: UB in asm aph@littlepinkcloud.invalid - 2018-01-04 05:38 -0600
                Re: UB in asm James Kuyper <jameskuyper@verizon.net> - 2018-01-04 07:05 -0500
                Re: UB in asm aph@littlepinkcloud.invalid - 2018-01-04 06:46 -0600
                Re: UB in asm scott@slp53.sl.home (Scott Lurndal) - 2018-01-04 16:09 +0000
                Re: UB in asm supercat@casperkitty.com - 2018-01-04 08:12 -0800
                Re: UB in asm supercat@casperkitty.com - 2018-01-04 08:00 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2018-01-04 10:02 -0500
          Re: UB in asm James Kuyper <jameskuyper@verizon.net> - 2017-12-24 17:04 -0500
          Re: UB in asm bartc <bc@freeuk.com> - 2017-12-24 22:29 +0000
            Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 14:50 -0800
              Re: UB in asm bartc <bc@freeuk.com> - 2017-12-24 23:23 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 15:58 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 16:26 -0800
                Re: UB in asm Gareth Owen <gwowen@gmail.com> - 2017-12-26 18:03 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-26 12:23 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-26 12:44 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 08:31 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-27 09:15 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 09:55 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 16:00 -0500
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-27 13:13 -0800
                Re: UB in asm Tim Rentsch <txr@alumni.caltech.edu> - 2017-12-27 11:28 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-27 11:35 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 20:29 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 12:46 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 22:00 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 14:16 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-27 13:09 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-26 20:54 +0000
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-25 01:24 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 17:55 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 18:24 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-29 19:39 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-30 11:20 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-24 21:17 -0500
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-24 18:34 -0800
                Re: UB in asm Noob <root@127.0.0.1> - 2017-12-25 14:36 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-25 15:52 +0000
            Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-24 21:22 -0500
              Re: UB in asm bartc <bc@freeuk.com> - 2017-12-25 13:08 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-25 10:06 -0500
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-26 16:07 +0100
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-26 08:55 -0800
                Re: UB in asm already5chosen@yahoo.com - 2017-12-26 09:45 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-26 13:12 -0500
                Re: UB in asm jameskuyper@verizon.net - 2017-12-26 10:30 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-26 13:48 -0500
                Re: UB in asm already5chosen@yahoo.com - 2017-12-26 10:51 -0800
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-27 05:27 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-27 10:09 +0100
                Re: UB in asm already5chosen@yahoo.com - 2017-12-27 04:10 -0800
                Re: UB in asm "James R. Kuyper" <jameskuyper@verizon.net> - 2017-12-27 08:50 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 14:30 +0000
                Re: UB in asm jameskuyper@verizon.net - 2017-12-27 06:49 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 15:25 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-27 17:05 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 09:45 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-27 20:40 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 12:43 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 10:09 +0100
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-28 11:24 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 08:59 +0100
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-29 13:25 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 11:29 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 18:06 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 20:23 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 12:59 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 16:28 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 14:34 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 11:09 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 08:57 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 09:37 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 10:47 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 11:04 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 21:17 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 01:45 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 11:11 +0100
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 16:17 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 13:51 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 17:49 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 22:08 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 17:41 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 15:36 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 11:49 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 12:53 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 21:27 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 20:42 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-30 20:50 -0500
                Re: UB in asm supercat@casperkitty.com - 2018-01-02 08:41 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 14:41 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 10:58 +0100
                Re: UB in asm already5chosen@yahoo.com - 2017-12-28 03:46 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 08:41 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 12:15 +0000
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-28 05:23 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 13:49 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 14:42 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 11:56 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 09:58 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 11:07 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 13:32 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 13:54 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 14:06 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 15:14 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 19:45 +0000
                Re: UB in asm Ian Collins <ian-news@hotmail.com> - 2017-12-29 08:51 +1300
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 12:14 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 20:03 -0500
                Re: UB in asm already5chosen@yahoo.com - 2017-12-29 02:28 -0800
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-29 13:54 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-29 14:51 -0800
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-29 16:04 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-30 02:06 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 11:22 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 21:48 -0500
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 09:11 +0100
                Re: UB in asm Spiros Bousbouras <spibou@gmail.com> - 2017-12-29 08:52 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 10:58 +0100
                Re: UB in asm Spiros Bousbouras <spibou@gmail.com> - 2017-12-29 10:38 +0000
                Re: UB in asm already5chosen@yahoo.com - 2017-12-29 03:01 -0800
                Re: UB in asm already5chosen@yahoo.com - 2017-12-29 03:07 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 12:21 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 12:20 -0800
                Re: UB in asm Robert Wessel <robertwessel2@yahoo.com> - 2017-12-29 16:05 -0600
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 14:48 -0800
                Re: UB in asm Spiros Bousbouras <spibou@gmail.com> - 2017-12-29 23:05 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 17:12 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 22:09 -0500
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 21:56 -0500
                Re: UB in asm Robert Wessel <robertwessel2@yahoo.com> - 2017-12-30 00:58 -0600
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-29 11:43 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 15:14 +0100
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-29 14:11 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-30 02:27 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 22:25 -0500
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 14:55 +0100
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 08:46 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 17:50 +0100
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 14:30 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 11:29 -0500
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 17:46 +0100
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 12:17 -0500
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 09:25 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 17:08 +0000
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 14:57 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 16:09 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 17:11 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 17:04 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 09:16 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 20:44 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 20:13 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 12:48 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 11:03 +0100
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 13:08 -0800
                Re: UB in asm Ian Collins <ian-news@hotmail.com> - 2017-12-29 11:17 +1300
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 22:54 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 11:07 +0100
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-28 15:46 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 17:00 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 23:39 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 16:05 -0800
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-28 15:55 -0800
                Re: UB in asm Spiros Bousbouras <spibou@gmail.com> - 2017-12-29 07:49 +0000
                Re: UB in asm Reinhardt Behm <rbehm@hushmail.com> - 2017-12-29 15:46 +0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 10:34 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-29 12:05 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 14:51 +0100
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-29 15:09 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-29 09:05 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 13:35 -0800
                Re: UB in asm Robert Wessel <robertwessel2@yahoo.com> - 2017-12-29 15:38 -0600
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 14:15 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 18:07 -0500
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-30 13:12 +0100
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-30 05:19 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-30 09:33 -0500
                Re: UB in asm supercat <flatfinger@casperkitty.com> - 2017-12-30 09:50 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-30 21:47 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-30 13:26 -0800
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-30 13:53 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-30 14:19 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-30 19:13 -0500
                Re: UB in asm Reinhardt Behm <rbehm@hushmail.com> - 2017-12-29 15:42 +0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-29 20:33 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 18:27 -0500
                Re: UB in asm Ian Collins <ian-news@hotmail.com> - 2017-12-30 12:49 +1300
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-29 23:56 +0000
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 16:59 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-29 22:45 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-30 12:49 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-30 15:01 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-30 20:42 +0000
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-30 14:11 -0800
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-30 22:25 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-30 19:02 -0500
                Re: UB in asm already5chosen@yahoo.com - 2017-12-31 03:25 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-31 19:48 -0500
                Re: UB in asm supercat@casperkitty.com - 2018-01-02 12:08 -0800
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 11:40 -0500
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 17:35 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 18:19 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 14:31 -0500
                Re: UB in asm jameskuyper@verizon.net - 2017-12-27 08:52 -0800
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 17:51 +0000
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 18:34 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-27 21:14 +0000
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-27 21:51 +0000
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 02:09 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 12:21 +0100
                Re: UB in asm asetofsymbols@gmail.com - 2017-12-28 00:14 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 08:57 -0800
                Re: UB in asm Keith Thompson <kst-u@mib.org> - 2017-12-27 09:55 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 11:07 -0800
                Re: UB in asm Geoff <geoff@invalid.invalid> - 2017-12-27 22:04 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 12:27 +0100
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-27 11:05 -0500
                Re: UB in asm Ian Collins <ian-news@hotmail.com> - 2017-12-28 16:36 +1300
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 12:31 +0000
                Re: UB in asm bartc <bc@freeuk.com> - 2017-12-28 12:35 +0000
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-28 15:05 +0100
                Re: UB in asm Ben Bacarisse <ben.usenet@bsb.me.uk> - 2017-12-28 14:47 +0000
                Re: UB in asm Richard Damon <Richard@Damon-Family.org> - 2017-12-28 11:45 -0500
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 09:16 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-28 11:00 -0800
                Re: UB in asm Reinhardt Behm <rbehm@hushmail.com> - 2017-12-29 15:30 +0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 11:44 -0800
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-28 15:25 -0800
                Re: UB in asm Spiros Bousbouras <spibou@gmail.com> - 2017-12-29 08:14 +0000
                Re: UB in asm Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2017-12-29 03:29 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-29 14:57 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-29 12:32 -0800
                Re: UB in asm jameskuyper@verizon.net - 2017-12-28 10:55 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-27 16:19 +0100
                Re: UB in asm supercat@casperkitty.com - 2017-12-27 09:10 -0800
                Re: UB in asm supercat@casperkitty.com - 2017-12-26 11:54 -0800
                Re: UB in asm David Brown <david.brown@hesbynett.no> - 2017-12-27 09:59 +0100
      Re: UB in asm already5chosen@yahoo.com - 2017-12-24 07:03 -0800

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