- Gpc - gnu.de

Vectorizing
by Peter 12 Jan '17

12 Jan '17

I've managed to get some Pascal code to vectorize! See attached example. I used GNU Pascal version 20070904, based on gcc-4.3.6. (64bit) Earlier 4.3.x might work, please try it. Caveats; Array to vectorize must start with lower bound zero. Must use While loop (For loop did'nt work). 32 bit Integers not working, floats or 64bit Ints only. gpc -O3 -ftree-vectorizer-verbose=2 av.pas av.pas:19: note: LOOP VECTORIZED. av.pas:0: note: vectorized 1 loops in function. Regards, Peter

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Inlining with gcc 4.x.x (Linux) ?
by Peter 12 Jan '17

12 Jan '17

I've built GPC 3.4.6 and 4.3.6 on Debian Stretch (64bit) Running benchmarks on a Perlin Noise routine I get 3.4.6 5.6 secs 4.3.6 11.0 secs !! The difference seems to be mainly down to a failure of 4.3.6 to inline. Call functions themselves may not take much time but I believe the real problem is that without the subroutines inlined, the main Noise function is no longer a leaf function, and therefore under register pressure. â¦..... a := Lerp (sx, u10, v10); b := Lerp (sx, u11, v11); d := Lerp (sy, a, b); Noise3 := Lerp(sz, c, d); End; This code produces with 3.4.6 { Hard to know where it starts without line numbers ! } addsd %xmm9, %xmm7 addsd %xmm3, %xmm2 subsd %xmm0, %xmm1 subsd %xmm7, %xmm2 mulsd %xmm14, %xmm1 mulsd %xmm14, %xmm2 addsd %xmm0, %xmm1 addsd %xmm7, %xmm2 subsd %xmm1, %xmm2 mulsd %xmm2, %xmm12 movsd %xmm12, %xmm0 addsd %xmm1, %xmm0 ret which is pretty lean & mean. However, with 4.3.6 I get movsd 112(%rsp), %xmm2 movsd 104(%rsp), %xmm1 movsd 48(%rsp), %xmm0 call _p__M0_S5_Lerp movsd 128(%rsp), %xmm2 movsd %xmm0, 152(%rsp) movsd 120(%rsp), %xmm1 movsd 48(%rsp), %xmm0 call _p__M0_S5_Lerp movsd 152(%rsp), %xmm1 movapd %xmm0, %xmm2 movsd 56(%rsp), %xmm0 call _p__M0_S5_Lerp movsd 40(%rsp), %xmm1 movapd %xmm0, %xmm2 movsd 64(%rsp), %xmm0 call _p__M0_S5_Lerp addq $240, %rsp popq %rbx popq %rbp popq %r12 popq %r13 popq %r14 popq %r15 ret ( Stack spills tend to be expensive on [my] AMD processor as the level 0/1 cache isn't that fast. Maybe I have broken my build of 4.3.6 Can anyone else conform the status of inlining on linux x86 with 4.x.x compilers? The simple example from the info file program InlineDemo; function Max (x, y: Integer): Integer; attribute (inline); begin if x > y then Max := x else Max := y end; begin WriteLn (Max (42, 17), ' ', Max (-4, -2)) end. Also does not work for me with 4.3.6. It still produces a call instruction. call _p__M0_S0_Max I recall also that inlining did not work with the official 4.1 Debian package. I was thinking of reporting this as a (Debian) bug a while back, but GPC was then removed from the archive, which made that moot. Going forward, I'm wondering which gcc version to base my builds on. 4.3.6 supports potentially a few more architectures, ARMel PowerPC SH4 and supports the -m32 switch, but a 100% slowdown on the CPU intensive stuff I use the compiler for is too much a penalty for me. >From further tinkering around, I notice that 3.4.6 often inlines even when not asked to do so, whereas 4.3.6 very rarely if ever inlines. Neither compiler seems to obey the inline attribute! Anyone any thoughts on this? Hoping of course that its an easy to fix typo type bug... Regards, Peter B

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GNU Pascal is still kind of alive (was: Extended Pascal)
by Treutwein Bernhard 10 Jan '17

10 Jan '17

Thanks a lot Waldek for: >Actually, this list is out of date. Starting from gpc-20051104 >qualified module import and structured value initializers are supported. >Few other were supported earlier. Current statement (which >AFAICS corresponds to gpc-20051104) is: > >: The Extended Pascal features still missing from GPC >: are set types with variable bounds and discriminated ordinal schema as >: schema discriminants. > Please don't be insulted, I appreciate very much what you are doing for GNU Pascal, but I think your note gives a good impression of the major obstacles for newcomers to gpc. A lot of information is hidden behind the web sites in personal memories. I know of the following sites: http://www.gnu-pascal.de/gpc/h-index.html http://alignment.hep.brandeis.edu/Software/Pascal/Pascal.html http://www.microbizz.nl/gpc.html https://github.com/hebisch/gpc Maybe there are more. Some infos from the brains went to the mailing list and is available in the archive. But it is unclear to me (and I guess others also) which information is still relevant and which is out of date. This is a bit frustrating, but as long as we have only more or less hobbyists working on GNU Pascal, we are out of luck. I do not know who, how, and where the collected and hopefully current information could be concentrated, but I think it would be very good to have a central place ... Peter Gerwinski noted las march a vague chance to have some student working for her/his thesis on GNU Pascal ... -- Bernhard

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RE: Update: Current GPC
by Treutwein Bernhard 10 Jan '17

10 Jan '17

Dear Waldek, [...] >If this is the case you should enable others to update the wiki. Oops. I just tried to edit the start page. As a signed in user, I am allowed to edit the page. @Oscar and @Ken: please try it also and go ahead if nobody objects -- Bernhard >-----Original Message----- >From: Treutwein Bernhard >Sent: Monday, January 09, 2017 1:56 PM >To: 'gpc(a)gnu.de' >Subject: Current GPC was: GNU Pascal is still kind of alive > >Dear Waldek, > >>> https://github.com/hebisch/gpc >>> >[...] >>At github there is updated manual (changes to earlier versions are >>small, but for example it contains up-to-date features list). > >Do I understand you correctly: > >https://github.com/hebisch/gpc is the current repository for >GNU Pascal source and documentation. > >If this is the case you should enable others to update the wiki. > >PS: I contacted Peter Gerwinski via PM if he is still watching >this mailing list and who/how somebody could be authorized >to update www.gnu-pascal.de. > >-- > Bernhard

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Re: GPC compile on Mac OS X 10.10.5?
by Schneider 10 Jan '17

10 Jan '17

Adriaan: > >*I'm on the new Mac OS X 10.10.5 and I've lost my gpc compiler.* > > Sorry, were to busy to reply, but will > > Regards, > > Adriaan van Os 3/4 of a year later I'm still having trouble with various alternatives to GPC. Are you in a position to get back to this? I see at http://www.microbizz.nl/gpc.html that > If you need paid technical support, send an email to > gpc(a)microbizz.nl. Microbizz can help you port your software to GNU > Pascal and to Mac OS X How much might it be to get GPC going again on the Mac? Regards, Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Center for Cancer Research Gene Regulation and Chromosome Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 schneidt(a)mail.nih.gov https://schneider.ncifcrf.gov (current link) https://alum.mit.edu/www/toms (permanent link)

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Current GPC was: GNU Pascal is still kind of alive
by Treutwein Bernhard 09 Jan '17

09 Jan '17

Dear Waldek, >> https://github.com/hebisch/gpc >> [...] >At github there is updated manual (changes to earlier versions are >small, but for example it contains up-to-date features list). Do I understand you correctly: https://github.com/hebisch/gpc is the current repository for GNU Pascal source and documentation. If this is the case you should enable others to update the wiki. PS: I contacted Peter Gerwinski via PM if he is still watching this mailing list and who/how somebody could be authorized to update www.gnu-pascal.de. -- Bernhard

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list server not responding?
by Schneider 07 Jan '17

07 Jan '17

I'm getting both individual postings and a digest. I want to stop the digest. So I sent: > Date: Wed, 4 Jan 2017 18:30:25 -0500 > From: Schneider <schneidt(a)mail.nih.gov> > To: gpc-request(a)gnu.de > Subject: set help > User-Agent: Mutt/1.7.1 (2016-10-04) The response included: > set digest plain > set digest mime > set digest off > When the `digest' option is turned off, you will receive postings > immediately when they are posted. Use `set digest plain' if instead > you want to receive postings bundled into a plain text digest > (i.e. RFC 1153 digest). Use `set digest mime' if instead you want to > receive postings bundled together into a MIME digest. So I sent: > Date: Wed, 4 Jan 2017 18:43:31 -0500 > From: Schneider <schneidt(a)mail.nih.gov> > To: gpc-request(a)gnu.de > Subject: set digest off > User-Agent: Mutt/1.7.1 (2016-10-04) but I'm still getting the digest every day. Have I done this wrong somehow or is the server broken? Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Center for Cancer Research RNA Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 schneidt(a)mail.nih.gov https://schneider.ncifcrf.gov (current link) https://alum.mit.edu/www/toms (permanent link)

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Running on a Mac
by Paul Isaacs 04 Jan '17

04 Jan '17

Hello, For Macs, Will gcc-3.4.4 and gpc20060325 compile and run on a current Mac? If not, will a cross compile of same run on a current Mac? Thanks, Paul Isaacs

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GPC on Mac
by Schneider 18 Jul '16

18 Jul '16

Is there any progress to get the GPC compiler going again on the Mac? Tom Thomas D. Schneider, Ph.D. Senior Investigator National Institutes of Health National Cancer Institute Center for Cancer Research Gene Regulation and Chromosome Biology Laboratory Molecular Information Theory Group Frederick, Maryland 21702-1201 schneidt(a)mail.nih.gov https://schneider.ncifcrf.gov (current link) https://alum.mit.edu/www/toms (permanent link)

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Re: GPC compile on Mac OS X 10.10.5?
by Pascal 14 Jul '16

14 Jul '16

Hello Tom, If ever you consider a port to an another language, I suggest Ada. Ada is issued from Pascal with strong type checking and more. (www.ada2012.org) It is an ISO standard. I port all my Pascal programs to Ada since 2000 and I'm very happy with it. I used P2Ada: http://p2ada.sourceforge.net. I have some exemples on my web site (in French). Feel free to ask questions if you are interested in. Regards, Pascal. http://blady.pagesperso-orange.fr > Le 27 janv. 2016 à 22:08, gpc-request(a)gnu.de a écrit : > > Date: Wed, 27 Jan 2016 14:11:59 -0500 > From: Schneider <schneidt(a)mail.nih.gov> > To: <samiam(a)moorecad.com> > Cc: gpc(a)gnu.de > Subject: Re: GPC compile on Mac OS X 10.10.5? > Message-ID: <20160127191159.GA73206(a)FR-W-C132678.ncifcrf.gov> > Content-Type: text/plain; charset="us-ascii" > > Scott: > >> What was wrong with getting a p2c translation (just curious). You >> only have to do the translation once, then you code in C after that. > > I'm used to programming in Pascal, not C. Also, it's safer because of > the type checking. If I switched I could never go back. > >> I used p2c (I assume we are talking about the same one). Its a very >> picky tool that crashes when you look at it funny, but I was able to >> get satisfactory results. > > You are right about looking at it funny! One kind of bug(?) is that > it changes how it handles i/o for the input file in the middle of the > code. I haven't determined why but fortunately it's a rare problem. > > Tom > > Thomas D. Schneider, Ph.D. > Senior Investigator > National Institutes of Health > National Cancer Institute > Center for Cancer Research > Gene Regulation and Chromosome Biology Laboratory > Molecular Information Theory Group > Frederick, Maryland 21702-1201 > schneidt(a)mail.nih.gov > https://schneider.ncifcrf.gov (current link) > https://alum.mit.edu/www/toms (permanent link) >

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