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Mac Forum / Programming / CodeWarrior / October 2003Compiling for the G5
Hi, I am going to get a Dual 2 GHz G5 PowerMac soon to speed up my simulations, and I wonder how to compile my code to make the most of this machine. As many of you will be aware, the G5 has 64-bit-wide registers, data paths, and internal logic units, instead of the 32 bit of the G3/G4. Apple distributes gcc3.3 in their August 2003 Developer Tools update, which is meant to make use of this feature. This will work in Project Builder, but what about CodeWarrior ? Does anyone have any experience with this ? I have CW v8.3. Also, is it possilble to compile code for the G5 on the G4 ? How ? While I am at it, any tips how to make my code more G5-suitable would also be highly appreciated. Thank you very much in advance, Karen  Signatureremove underscore and seven from my email address > Hi, > [quoted text clipped - 6 lines] > work in Project Builder, but what about CodeWarrior ? Does anyone have > any experience with this ? I have CW v8.3. MetroWerks seesm to have dropped th eballas fasr as supporting the G5 is concerned. If you relaly need ervy last ounce of performance on the G5 then you shoul dprobabyl consider using Apple's developer tools (gcc), which have support for the G5. > Also, is it possilble to compile code for the G5 on the G4 ? How ? The G5 instruction set is almost identical to, and mostly compatible with the G4. If you use Apple's gcc you just turn on the G5 code generation option, which mainly affects instruction scheduling. In general you can build the code on G4 and/or G5 and run it on G4 and/or G5. The only real issue is performance. > While I am at it, any tips how to make my code more G5-suitable would > also be highly appreciated. There are a number of tech notes on this subject at developer.apple.com, and if you're serious about optimisation then you should also download the CHUD (performance tools) package from the same place. Good luck, Paul > > Hi, > > [quoted text clipped - 9 lines] > MetroWerks seesm to have dropped th eballas fasr as supporting the G5 is > concerned. It would be more correct to say that documentation for the G5 was released too late for Metrowerks to include support in CW 9. Chris > It would be more correct to say that documentation for the G5 was > released too late for Metrowerks to include support in CW 9. OK, except that they don't seem to be in any hurry to rectify this situation. Apparently we won't see G5 support until CW 10 at the earliest. Paul Your best hope for G5 compilation are the recently released IBM xlc and xlC (C++) compilers. On the bright side, the code they put out is stupid fast. Get them at http://www-3.ibm.com/software/awdtools/ccompilers/ > > It would be more correct to say that documentation for the G5 was > > released too late for Metrowerks to include support in CW 9. [quoted text clipped - 3 lines] > > Paul Thank you for your help, everybody. The links and tips are very useful ! Karen Signatureremove underscore and seven from my email address > Your best hope for G5 compilation are the recently released IBM xlc > and xlC (C++) compilers. On the bright side, the code they put out is > stupid fast. > > Get them at http://www-3.ibm.com/software/awdtools/ccompilers/ Have you actually tried to use the IBM compilers ? They are still beta and apparently not feature complete, e.g. xlc++ does not support Altivec or inline asm. But I'd be interested to see any real world benchmark results for xlc/xlc++ versus CodeWarrior and/or gcc 3.3. Paul >> It would be more correct to say that documentation for the G5 was >> released too late for Metrowerks to include support in CW 9. > >OK, except that they don't seem to be in any hurry to rectify this >situation. Apparently we won't see G5 support until CW 10 at the earliest. What company are you talking for or are you "Assuming things" ? Ron SignatureNow Shipping CodeWarrior Development Studio, ARM ISA Edition for Linux Platform Development v2 <http://store.metrowerks.com/> Sales and Support 512-996-5300 800-377-5416 Ron Liechty - MWRon@metrowerks.com - http://www.metrowerks.com >>>It would be more correct to say that documentation for the G5 was >>>released too late for Metrowerks to include support in CW 9. [quoted text clipped - 3 lines] > > What company are you talking for or are you "Assuming things" ? I thought I was paraphrasing you, Ron ? Didn't you say recently that G5 support would not appear until CW 10 ? Apologies if I have misquoted or misinterpreted you. Paul >>>>It would be more correct to say that documentation for the G5 was >>>>released too late for Metrowerks to include support in CW 9. [quoted text clipped - 7 lines] >support would not appear until CW 10 ? Apologies if I have misquoted or >misinterpreted you. I don't think anything is written in Stone at this time. Right now I don't see any great demand for it, if that changes we will change too. I just didn't want to be boxed into any commitment. Ron SignatureNow Shipping CodeWarrior Development Studio, ARM ISA Edition for Linux Platform Development v2 <http://store.metrowerks.com/> Sales and Support 512-996-5300 800-377-5416 Ron Liechty - MWRon@metrowerks.com - http://www.metrowerks.com > I don't think anything is written in Stone at this time. Right now I > don't see any great demand for it, if that changes we will change too. > I just didn't want to be boxed into any commitment. It would be a shame if MetroWerks threw away its competitive edge - CW still generates the best AltiVec code for G4 of any compiler on any platform and this is one of the main reasons that I still use it rather than switching to PB/XCode/gcc. If MW doesn't invest in supporting the G5 now it will be only a second or third best compiler in a year's time. Paul >> I don't think anything is written in Stone at this time. Right now I >> don't see any great demand for it, if that changes we will change too. [quoted text clipped - 5 lines] >than switching to PB/XCode/gcc. If MW doesn't invest in supporting the >G5 now it will be only a second or third best compiler in a year's time. I think you mistook my reply. I meant I didn't want to be boxed into saying it would not be before CW 10, not that it won't be in CW 10. Ron SignatureNow Shipping CodeWarrior Development Studio, ARM ISA Edition for Linux Platform Development v2 <http://store.metrowerks.com/> Sales and Support 512-996-5300 800-377-5416 Ron Liechty - MWRon@metrowerks.com - http://www.metrowerks.com >>>I don't think anything is written in Stone at this time. Right now I >>>don't see any great demand for it, if that changes we will change too. [quoted text clipped - 8 lines] > I think you mistook my reply. I meant I didn't want to be boxed into > saying it would not be before CW 10, not that it won't be in CW 10. OK - point taken - let's hope it's sooner than CW10 then. Regards, Paul |
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