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- From: keith@msmri.med.ubc.ca (Keith S Cover)
- Newsgroups: comp.lang.c++,sci.math.num-analysis
- Subject: SUMMARY: Multiple precision software
- Message-ID: <1dosmoINNei7@iskut.ucs.ubc.ca>
- Date: 10 Nov 92 17:49:12 GMT
- Distribution: inet
- Organization: University of British Columbia, Vancouver, B.C., Canada
- Lines: 162
- NNTP-Posting-Host: msmri.med.ubc.ca
-
- Here are the replies I received to my requested for multiple precision
- software. The software not written in C++ could be provided with a
- C++ wrapper.
-
- Keith S Cover
- Physics, UBC
- Vancouver, B.C.
- Canada
-
- ============================================================================
-
- From khattra@cs.sfu.ca Fri Oct 30 11:40:25 1992
- Organization: CSS, Simon Fraser University, Burnaby, B.C., Canada
-
- It's not a class library, but you may want to snarf
- the multi-precision code from GNU bc.
-
- --
- Taj Khattra
-
- =============================================================================
-
- From kbriggs@mundoe.maths.mu.oz.au Mon Nov 2 15:08:47 1992
-
- Brent's MP has been the standard for at least 15 years. It is on netlib,
- I think under `bmp'. It was documented in TOMS, I think around volume 3 or
- 4. I can get the exact refs if you need them.
- Keith.
-
- =============================================================================
-
- From plyon@emx.cc.utexas.edu Mon Nov 2 21:18:24 1992
-
- There is an article by Jerry Schwartz entitled "Implementing infinite
- precision arithmetic" in the _9th Symposium on Computer Arithmetic_
- (Santa Monica, CA) (Sorry, I do not know the publisher), in which he
- alludes to a C++ implementation, but I do not know where one might
- come by this.
-
- There is a C library of extended precision floating point functions
- called CEPHES available for anon ftp from usc.edu in the
- directory pub/C-numanal. You might wish to have a look at that; it could
- be that it could be converted to a C++ class library without much
- difficulty.
-
- You also might find the article "Optimizing Programmes over the
- Constructive Reals" useful (by Vernon Lee and Hans Boehm, ACM SIGPLAN
- '90 Conference on Programming Language Design and Implementation).
-
- It might also be useful to collect the "free-c" (at least I think
- that's what it's called) document by Ajah Shah from Netlib
- (research.att.com).
-
- Hope this helps...
-
-
- Paul Lyon
-
- ============================================================================
-
- From tjm@netcom.com Mon Nov 2 22:24:24 1992
- From: "Thomas J. Merritt" <tjm@netcom.com>
-
- I have a class "Float" that provides a software implementation of
- floating point with arbitrary precision. It currently suports +, -, *,
- /, sqrt, exp, log, pow, [a]sin[h], [a]cos[h], [a]tan[h], and convertions
- to and from strings and doubles. It conforms to IEEE-754/854. The
- implementation is relatively fast and accurate.
-
- If you would like more detail or would like to be a beta site for this
- software drop me a note.
-
- % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % %
- Thomas J. Merritt % Code Generation % PO Box 192746
- tjm@netcom.com % |Technology % San Francisco, CA 94119
- % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % % %
-
- =============================================================================
-
- From 48GANELIN@cua.edu Thu Nov 5 17:10:38 1992
- Date: 05 Nov 1992 20:12:12 -0500 (EST)
- From: Pavel Ganelin <48GANELIN@cua.edu>
-
- GNU C++ compiler has multiprecision Integer, Rational and
- RealFixedLenght arithmnetic.
-
- prep.ai.mit.edu ~/pub/gnu/gcc-2.2.2.tar.Z
- prep.ai.mit.edu ~/pub/gnu/gcc-lib++-2.2.tar.Z
-
-
- It is very easy to use in program. Integeran represenation is hidden
- and you can use big numbers in expression the same way as usual ones.
- The only problem I had it do very strange things on DJ GPP port for PC386,
- when you try to covert back from Rational to double or long.
-
- =============================================================================
-
- From: dbailey@wk49.nas.nasa.gov (David H. Bailey)
- Sender: news@nas.nasa.gov (News Administrator)
- Organization: NAS, NASA Ames Research Center, Moffett Field, CA
- Date: Fri, 6 Nov 92 01:12:07 GMT
-
- Some of you may be aware of a multiprecision computation package and a
- multiprecision Fortran translator that I have developed during the
- past year or two. I am now pleased to announce that this software has
- been approved by NASA Ames for unlimited international distribution,
- at no cost. A brief description of this software is as follows:
-
- The first package contains approximately 85 Fortran subroutines that
- perform a variety of arithmetic operations and transcendental
- functions. The basic arithmetic routines are very efficient, and for
- extra high levels of precision (about about 1000 digits), some
- additional routines are available that employ advanced algorithms,
- such FFT-based multiplication and the Borwein transcendental
- algorithms, for additional speedup. On some problems these routines
- are over 200 times faster than certain other multiprecision tools.
-
- However, as with other such packages, manually converting a program to
- use these routines is a tedious and error-prone process. To
- facilitate such conversions, I have now developed a multiprecision
- translator for Fortran programs. By means of source directives
- (special comments) placed in a standard Fortran-77 program, the user
- declares the precision level and specifies which variables in each
- subprogram are to be treated as multiprecision. The translator
- program reads this source program and outputs a program with the
- appropriate multiprecision subroutine calls, which can then be linked
- with the multiprecision package and executed.
-
- This translator program supports multiprecision integer, real and
- complex datatypes. The required array space for multiprecision data
- types is automatically allocated. In the evaluation of computational
- expressions, all of the usual conventions for operator precedence and
- mixed mode operations are upheld. Furthermore, most of the Fortran-77
- intrinsics, such as ABS, MOD, NINT, COS, EXP are supported and produce
- true multiprecision values.
-
- Both the multiprecision package and translator are written in highly
- portable Fortran-77 and have been successfully implemented on a
- variety of systems, ranging from parallel supercomputers to
- workstations.
-
- If anyone is interested in obtaining this software, plus the
- accompanying documentation, send me a note, and I will respond by
- e-mail. I eventually intend to place this software on public media
- such as netlib, but for the time being I am handling it myself, so
- that any bug fixes or enhancements can be promptly distributed. Since
- it is a small but significant amount of trouble for me to respond,
- please don't request unless you are somewhat serious about needing
- this software.
-
- David H. Bailey
- NASA Ames Research Center
- dbailey@nas.nasa.gov
-
- =============================================================================
-
- From: moshier@world.std.com (Stephen L Moshier)
- Organization: The World Public Access UNIX, Brookline, MA
-
- There are at least three such packages in netlib (research.att.com).
- Two Fortran programs are in netlib/toms, and there is a C suite
- in netlib/cephes.
-