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- From: rob@pact.nl (Rob Kurver)
- Newsgroups: comp.sys.transputer
- Subject: Re: IS Occam3 recursive?
- Message-ID: <rob.722124411@dutncp8>
- Date: 18 Nov 92 22:06:51 GMT
- References: <rob.721665532@dutncp8> <MICHAEL.92Nov16185558@lucrece.uk.ac.oxford> <2292@eagle.ukc.ac.uk> <rob.722034771@dutncp8> <1992Nov18.130407.12799@titan.inmos.co.uk>
- Sender: news@dutrun2.tudelft.nl (UseNet News System)
- Organization: PACT, Delft, The Netherlands
- Lines: 67
- Nntp-Posting-Host: dutncp8.tn.tudelft.nl
-
- In <1992Nov18.130407.12799@titan.inmos.co.uk> steved@lion.inmos.co.uk (Stephen Doyle) writes:
-
- >In article <rob.722034771@dutncp8> rob@pact.nl (Rob Kurver) writes:
-
- >>
- >>The CSP paradigm as supported by Occam and PACT Parallel C is a very
- >>powerful one, and is especially interesting with the support provided
- >>by the transputer.
- >>
- >>Cheers. - Rob
- >>
-
- >Rob, you seem to have forgotten about INMOS ANSI C providing the same sort of
- >CSP paradigm as your own, this obviously slipped your mind :-). I guess the
- >difference boils down to whether you want an ANSI C validated compiler with
- >functional additions for parallelism and communications or an ANSI C compiler
- >with non-ANSI language additions for the same.
-
- Steve, you seem to have forgotten about PACT Parallel C providing the same
- sort of functional additions as your own, this obviously slipped your
- mind :-). It is my humble opinion that the CSP paradigm really should be
- supported by language constructs. Yes, use of the C language constructs
- makes for a not strictly conforming program, so you'd better not use them
- if you intend to port your code to a non-transputer. Better not use
- Occam in this case, either... :-) The language constructs were added to
- PACT Parallel C in an ANSI conforming manner - if you don't use them, you
- have a fully validated ANSI C compiler. (Please reply by email if you're
- interested in the details of this.)
-
- I guess the difference boils down to whether you want an ANSI C validated
- compiler with functional additions for parallelism and communications or
- an ANSI C validated compiler with the same functional additions for
- parallelism and communications, with language constructs thrown in as
- well.
-
- > I would argue (from customer
- >feedback) that OCCAM tends to be used along with INMOS ANSI C as this
- >provides you with a flexible environment for parallel/comms/sequential
- >programming with excellent diagnostics at compile and run time.
-
- We support mixing of Occam and PACT Parallel C object modules, for the
- exact same reasons Inmos do. No argument there. Although customer
- feedback indicates people eventually forget about Occam as they find
- they can do everything they want in PACT Parallel C.
-
- >Just to cloud the issue once more INMOS' soon to be shipping new optimising C
- >compiler has a specific optimisation for tail call recursion i.e.
-
- We decided against tail recursion optimization as it really doesn't improve
- performance very much. Of course, we continue to add optimizations and
- improve our product as well, to make sure PACT Parallel C stays faster.
- I've seen benchmark results of the beta version of your new optimizing C
- compiler, and was relieved (although not surprised) to see PACT Parallel
- C is still faster.
-
- >Steve
-
- Rob
-
- P.S.: How come we don't here from Kirk Bailey about this recurring
- subject? Are you still with us, Kirk?
-
- --
- PACT Rob Kurver
- Foulkeslaan 87 rob@pact.nl
- 2625 RB Delft ph: +31 15 616864
- The Netherlands fax: +31 15 610032
-