C version of Kahan's SRTEST program available

[Dan Nelsen]

Prof. Kahan's divide test program SRTEST, ported to C, is now available on
QED's web page http://www.qedinc.com/  under the "Software etc." link.  The
README file is included below.

I would be interested in hearing how quickly this version of SRTEST fails on
a buggy Pentium (command line options for Pentium:  srtest 5 2 1 1).


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Unpacking instructions:
  1.  gunzip srtest.tar.gz          (gnu version of uncompress)
  2.  tar xvf srtest.tar
  3.  follow the compile instructions in the README file

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README file:

DOCUMENTATION:

Complete documentation for the algorithm this program uses can be downloaded
from  http://http.cs.berkeley.edu/~wkahan


DIFFERENCES:

This version uses 64-bit IEEE dbl vs. 80-bit IEEE extended in the original.
This version prints its output in a different form than the original FORTRAN
version.  Also, this version will exit once a miscompare is detected--the
original version would continue running and keep track of which miscompare
had the greatest error.


PORTABILITY:

srtest.c is somewhat portable in that it should run without modification
on big-endian or little-endian systems, with a default (int) size of 32-bits.
It has been tested on Sun and SGI workstations, and a 486 pc running Linux.
This program was developed using gcc.  Therefore, compiling with any other
compiler may require minor modifications (changing 64-bit constants from 0x0LL
to 0x0, etc.).


COMPILE INSTRUCTIONS:

To compile for Intel x86:
  gcc -Dx86 -O -o srtest srtest.c -lm

To compile for other systems:
  gcc -O -o srtest srtest.c -lm


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Daniel H. Nelsen			email:  dhnaqedinc.com 
Quantum Effect Design			WWW:  http://www.qedinc.com/
Santa Clara, CA
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