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Re: A problem with gforth-fast

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Bernd Paysan wrote:

> Andrew Haley wrote:
> 
>> Bernd Paysan <bernd.paysan@gmx.de> wrote:
>> Fascinating.  Is it simply that cos() leaves the stack pointer
>> depressed?  And no-one noticed!  I guess as long as you don't call it
>> too many times in a loop, no-one ever would.  :-)
> 
> It clobbers ECX.  As long as you don't keep anything of value in ECX, it
> works fine.  Apparently, GCC doesn't usually allocate ECX, which is
> precisely the reason why we use it as TOS cache.  All assembly
> instructions that needs ECX, like shifts or rep movs/rep stos do fit with
> the TOS=ECX.

Question for the users: The workaround and the backport to then 0.7.3 is not 
actually difficult; the difficult part was to identify all the math 
functions which do it.  Should I just do a backport and make a 0.7.3 
release?  It's after all a critical bug, because it breaks programs.

-- 
Bernd Paysan
"If you want it done right, you have to do it yourself"
http://bernd-paysan.de/

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A problem with gforth-fast humptydumpty <ouatubi@gmail.com> - 2013-10-11 02:51 -0700
  Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 17:00 +0200
    Re: A problem with gforth-fast humptydumpty <ouatubi@gmail.com> - 2013-10-11 08:54 -0700
    Re: A problem with gforth-fast Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-11 10:57 -0500
      Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 18:49 +0200
        Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 21:08 +0200
          Re: A problem with gforth-fast humptydumpty <ouatubi@gmail.com> - 2013-10-11 12:54 -0700
            Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 23:21 +0200
              Re: A problem with gforth-fast humptydumpty <ouatubi@gmail.com> - 2013-10-11 23:58 -0700
        Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-11 21:30 +0200
        Re: A problem with gforth-fast Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-12 03:06 -0500
          Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-12 15:50 +0200
          Re: A problem with gforth-fast anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-14 17:17 +0000
            Re: A problem with gforth-fast Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-14 12:49 -0500
              Re: A problem with gforth-fast anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-15 09:50 +0000
                Re: A problem with gforth-fast Andrew Haley <andrew29@littlepinkcloud.invalid> - 2013-10-15 07:48 -0500
                Re: A problem with gforth-fast anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-15 13:35 +0000
                Re: A problem with gforth-fast Bernd Paysan <bernd.paysan@gmx.de> - 2013-10-15 17:09 +0200
                Re: A problem with gforth-fast anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2013-10-16 16:36 +0000

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