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Scientific Subroutine Package (SSP)
Program Title Scientific Subroutine Package,
Version III
Program Origin IBM System/360 Application Program
Number 360A-CM-03X
Source Language FORTRAN IV
Program Description "The Scientific Subroutine Package
(SSP) is a collection of over 250
FORTRAN subroutines divided, for
the sake of presentation, into two
groups: statistics and mathematics.
Also, over 200 subroutines are
presented in both single and double
precision mode. SSP is a
collection of input/output-free
computational building blocks that
can be combined with a user's
input, output, or computational
routines to meet his needs."
Program Documentation This document describes the
implementation and use of SSP on
the Wesleyan Computing Center
DECSystem-10. The user is referred
to System/360 Scientific Subroutine
Package, Version III, Programmer's
Manual (IBM publication
gh20-0205-4) for complete
descriptions and listings of the
subroutines. Copies of this manual
are in the keypunch room, the
computer room, and the WCC library.
Date 1973 July 22
Scientific Subroutine Package PAGE 2
Using SSP on the Dec-10
Various files related to SSP are kept in four different
places. The relocatable binary files of the SSP routines
are in the indexed library file WES:SSP.REL. The test cases
(in card deck format for input to CDRSTK) are on DECtape
D00011. MAGtape M02017 contains a separate description of
each program. MAGtape M12142 contains all of the above,
plus the source files for all SSP routines, plus control
files for compiling and arranging the sources.
LIBRARY FILE
To use one or more unmodified SSP routines with your
main program, simply include CALLs to those routines (the
calling sequences are described in the IBM SSP Programmer's
Manual) in your program and add ",WES:SSP/LIBRARY" to your
LOAD, EXECUTE, or DEBUG command string. The LOADER will
load those (and only those) SSP routines that your program
calls.
SAMPLE DECKS
If you want to run one of the SSP sample decks, (e. g.
DASCR - data screening) type the following:
.LOGIN 30,30 (30,30 is the demonstration
PPN)
.MOUNT DTA SSP/VID:D00011/WLOCKED
.R CDRSTK
*START SSP:DASCR.CDK (CDRSTK treats the file as if
it's a card deck)
*^C
.DISMOUT SSP/REMOVE
.KJOB/F
Listings of the sample main program and any special sample
subroutines that it calls, the output from the program, and
a log file describing what happened will all be printed. If
you want to use a sample main program with your own data, or
to modify one for your own purposes, get a copy of the
program and any special sample subroutines it calls from
M12142 (see below).
INDIVIDUAL PROGRAM DESCRIPTIONS
M02017 contains a separate description of each SSP
subroutine, sample main program, and special sample
subroutine (except FUN). These descriptions consist of the
text from the comment cards at the beginning of each
program. Each program description contains purpose, usage,
description of parameters, remarks, subroutines and function
subprograms required, and method. The tape is in FAILSAFE
Scientific Subroutine Package PAGE 3
Using SSP on the Dec-10
format. The files are in alphabetical order and have the
extension .DOC. To get descriptions of, for example, MINV,
MULTR, and EIGEN, type:
.MOUNT MTA FAILSAFE/VID:M02017/WLOCKED
.R FAILSAFE
*/W
*/G50,1107
*EIGEN.DOC,MINV.DOC,MULTR.DOC
*^C
.UNLOAD FAILSAFE:
.DISMOUNT FAILSAFE/REMOVE
.PRINT/FORM:3HOLE/HEADER:0/DISPOSE:RENAME *.DOC
Note that if the files are not requested in the order in
which they appear on the tape (in this case, alphabetical),
FAILSAFE will search the tape more than once in order to
find the files.
M02017
This tape is a 556 bpi double FAILSAFE of [50,1107].
If you want to get a copy of the source code for any SSP
program, this is where it's at. It contains the following
files:
SSP.DIR Checksum directory of the files on the tape
SSP.RNO The source for this document
SSP.MAN This thing
SSP.CCL PIP command file to rename all SSP files to
a different directory in this order.
SSP.CTL Batch control file to compile, list, and
fudge all SSP subroutines
SSP.CMD Lists all SSP sources in the order in which
their .REL files will appear in the library
file. The order is essentially
alphabetical, except that a few files were
moved so that the LOADER won't miss
anything on a one-pass search.
SSP.REL The indexed library file created by SSP.CTL
containing what's listed in SSP.CMD
*.CDK Card image sample decks for input to CDRSTK
*.SSP The subroutine source files. The order of
these and of *.SMP and *.SSS is the same as
that in the "CATEGORICAL GUIDE TO
SUBROUTINES AND SAMPLE PROGRAMS" in the SSP
Programmer's Manual.
LOC.MAC MACRO rewrite of LOC
*.SMP Sample main programs
*.SSS Special sample subroutines
LOC.IBM The original FORTRAN LOC (replaced with a
MACRO version)
RANDU.IBM The IBM 360 machine-specific RANDU which
Scientific Subroutine Package PAGE 4
Using SSP on the Dec-10
has been replaced with a routine which
simply calls SETRAN, RAN, and SAVRAN.
*.DOC Individual program document files (see
description above). The order is
alphabetical.
Implementation
Modifications
1) RANDU, which is, of course, machine-specific, has been
replaced with a routine that uses the same calling
sequence as RANDU but calls SETRAN, RAN, and SAVRAN to
do the work. The original RANDU is on the tape as
RANDU.IBM.
2) The maximum magnitude of an exponent on the 360 is
about twice that on the 10. The following programs
were changed accordingly: TALLY, TAB1, TAB2, MISR,
SMIRN, MPAIR, BDTR, CDTR, NDTRI, BISER, PHI, POINT,
TETRA, RECP, ACFI, DACFI, DCAR, DDCAR, DBAR, DDBAR,
GMMMA, DLGAM, BESY, BESK, EXPI, SICI, CEL1, DCEL1,
CEL2, DCEL2.
3) The package contains several Gaussian quadrature
routines. In three of these (DQL32, DQH64, DQA32) the
exponents of the coefficients of some of the terms in
the series were too small (i. e. too far negative).
In each of these cases the exponent of each term in the
series was increased by 20 and the sum of the series
was multiplied by 1d-20.
4) Tests for end of card file were inserted in the sample
programs.
5) A call to the subroutine VARMX in the sample program
FACTO was short one argument. That was fixed.
6) The very frequently used LOC routine was rewritten in
MACRO. The rewrite runs 3 to 5 times faster.
Testing
The sample programs were run and the results were
compared with those given in the IBM SSP manual. The
results agreeed within the accuracies of the machines. One
sample program, SMPRT produced 3992 floating overflows, but
correct results. According to the documentation on POLRT
(the subroutine which SMPRT uses) this is not unexpected.