Whetstone

Converted Whetstone Double Precision Benchmark

Version 1.2 22 March 1998

(c) Copyright 1998 Painter Engineering, Inc. All Rights Reserved.

Permission is granted to use, duplicate, and publish this text and program as long as it includes this entire comment block and limited rights reference.

Converted by Rich Painter, Painter Engineering, Inc. based on the www.netlib.org benchmark/whetstoned version obtained 16 March 1998.

A novel approach was used here to keep the look and feel of the FORTRAN version. Altering the FORTRAN-based array indices, starting at element 1, to start at element 0 for C, would require numerous changes, including decrementing the variable indices by 1. Instead, the array E1[] was declared 1 element larger in C. This allows the FORTRAN index range to function without any literal or variable indices changes. The array element E1[0] is simply never used and does not alter the benchmark results.

The major FORTRAN comment blocks were retained to minimize differences between versions. Modules N5 and N12, like in the FORTRAN version, have been eliminated here.

An optional command-line argument has been provided [-c] to offer continuous repetition of the entire benchmark. An optional argument for setting an alternate LOOP count is also provided. Define PRINTOUT to cause the POUT() function to print outputs at various stages. Final timing measurements should be made with the PRINTOUT undefined.

Questions and comments may be directed to the author at r.painter@ieee.org