On 2005-01-05, Al <alnews67@hotmail.com> wrote:>> Interesting that you can't actually name any... > > 8051.Not relevent.>> Why? > > Because I need it to work on any processor. *ANY* processor. > Even those that don't exist yet ;-)That's an unrealistic expection. -- Grant Edwards grante Yow! I want another at RE-WRITE on my CEASAR visi.com SALAD!!
Processors who's stack grows up
Started by ●January 4, 2005
Reply by ●January 5, 20052005-01-05
Reply by ●January 5, 20052005-01-05
Richard,
You are correct. We don't do 8-bits anyway, but thanks for the input!
Adam
"www.FreeRTOS.org" <noemail@given.com> wrote in message
news:tUzCd.42971$48.1879@fe1.news.blueyonder.co.uk...
>
> "Adam Messer" <adam_messer@mentor.com> wrote in message
> news:41dabc9a$1@solnews.wv.mentorg.com...
>> Hello,
>>
>> I am the lead engineer on the Nucleus Plus RTOS. One of my coworkers
>> asked me if I knew any processors that had a stack that grows up. The
>> only
>> one I knew of, for sure, was the Intel i960. We have a fair amount of
>> code
>> in our system that accommodates stacks that grow up. If we can't find a
>> reasonable number of processors who's stack does grow up we will remove
> that
>> code.
>>
>> TIA,
>> Adam Messer
>> adam_messer@mentor.com
>>
>>
>
> PIC and 8051 I think. Don't suppose you are interested in these those.
>
> Regards,
> Richard.
>
> http://www.FreeRTOS.org
>
>
Reply by ●January 5, 20052005-01-05
Georgi,
Thanks for the input!
Adam
"Georgi Beloev" <gbH8SPAM@beloev.net> wrote in message
news:ztudncoe188mTEfcRVn-rg@megapath.net...
> Adam Messer wrote:
>> Hello,
>>
>> I am the lead engineer on the Nucleus Plus RTOS. One of my coworkers
>> asked me if I knew any processors that had a stack that grows up. The
>> only
>> one I knew of, for sure, was the Intel i960. We have a fair amount of
>> code
>> in our system that accommodates stacks that grow up. If we can't find a
>> reasonable number of processors who's stack does grow up we will remove
>> that
>> code.
>>
>> TIA,
>> Adam Messer
>> adam_messer@mentor.com
>>
>>
>
> On the ARM you can decrement or increment the stack pointer when loading
> multiple registers - take a look at LDMIA, LDMIB, LDMDA, and LDMDB. I
> don't know if any standard development environment uses the
> stack-growing-up convention.
>
> Regards,
> -- Georgi
Reply by ●January 6, 20052005-01-06
> Not a joy. Just professional. I need products that work. Always. Nucleus > always did. I don't want it changed! > > Al.If you want to product that always work , then you cannot select a CPU where the stack grows up, so Nucleus will work for you anyway. Thus no motivation to keep that code in Nucleus... -- Best Regards, Ulf Samuelsson ulf@a-t-m-e-l.com This is a personal view which may or may not be share by my Employer Atmel Nordic AB
Reply by ●January 6, 20052005-01-06
On 5 Jan 2005 20:29:28 GMT, Al <alnews67@hotmail.com> wrote: [Snipped]> >I've worked with Nucleus source code on many occasions and have had no >problems regarding readability :-) Conditionals can be easily stripped with >a preprocessor, so I don't generally worry.[Snipped] Regarding the point above. Normally when using a preprocessor to strip out the conditional code. It expands everything. Is there an option or other tool that will only strip out the conditionals ? Regards Anton Erasmus
Reply by ●January 6, 20052005-01-06
>PIC and 8051 I think. Don't suppose you are interested in these those.PICs (at least the 12-bit and 14-bit cores) don't have a memory-mapped stack, so whether they grow up or down is invisible and hence irrelevant. Wouter van Ooijen -- ------------------------------------ http://www.voti.nl Webshop for PICs and other electronics http://www.voti.nl/hvu Teacher electronics and informatics
Reply by ●January 6, 20052005-01-06
"Wouter van Ooijen (www.voti.nl)" <wouter@voti.nl> wrote in message news:41dd6283.156976680@news.xs4all.nl...> >PIC and 8051 I think. Don't suppose you are interested in these those. > > PICs (at least the 12-bit and 14-bit cores) don't have a memory-mapped > stack, so whether they grow up or down is invisible and hence > irrelevant. >The Microchip PIC18 C compiler uses the POSTINC/POSTDEC registers to effect a stack and frame. Regards, http://www.FreeRTOS.org
Reply by ●January 6, 20052005-01-06
>> Because I need it to work on any processor. *ANY* processor. >> Even those that don't exist yet ;-)Such as my paper design for a balanced-ternary number system reconfigurable array processor? Which is unlikely to ever exist. -- mac the na�f
Reply by ●January 7, 20052005-01-07
In article <1105005503.c2e7c4d716c50ca8103adc1a6645169f@teranews>, Anton Erasmus <nobody@spam.prevent.net> writes:> On 5 Jan 2005 20:29:28 GMT, Al <alnews67@hotmail.com> wrote: > > [Snipped] >> >>I've worked with Nucleus source code on many occasions and have had no >>problems regarding readability :-) Conditionals can be easily stripped with >>a preprocessor, so I don't generally worry. > > [Snipped] > > Regarding the point above. Normally when using a preprocessor to strip > out the conditional code. It expands everything. Is there an option or > other tool that will only strip out the conditionals ? >I'm using a tool called 'preparser' which comes from the isdn4linux community, see: http://www.isdn4linux.de/cgi-bin/viewcvs.cgi/isdn/README.preparser?rev=HEAD Apparently the sourcecode is not online, but the author says he'll send it upon request. Rob -- Robert Kaiser email: rkaiser AT sysgo DOT com SYSGO AG http://www.elinos.com Klein-Winternheim / Germany http://www.sysgo.com
Reply by ●January 7, 20052005-01-07
In article <41dabc9a$1@solnews.wv.mentorg.com>, "Adam Messer" <adam_messer@mentor.com> writes:> We have a fair amount of code > in our system that accommodates stacks that grow up. If we can't find a > reasonable number of processors who's stack does grow up we will remove that > code.The MIPS processor doesn't really have a notion of a stack (and I suspect this applies to some other RISC architectures as well). It is up to the compiler to implement a stack and so a compiler writer can choose to let the stack grow up or down. However, I'm not aware of any MIPS compilers that actually let the stack grow up. Rob -- Robert Kaiser email: rkaiser AT sysgo DOT com SYSGO AG http://www.elinos.com Klein-Winternheim / Germany http://www.sysgo.com
