109 lines
2.8 KiB
C
109 lines
2.8 KiB
C
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/*******************************************************************************
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* The BYTE UNIX Benchmarks - Release 3
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* Module: arith.c SID: 3.3 5/15/91 19:30:19
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*
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*******************************************************************************
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* Bug reports, patches, comments, suggestions should be sent to:
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*
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* Ben Smith, Rick Grehan or Tom Yager
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* ben@bytepb.byte.com rick_g@bytepb.byte.com tyager@bytepb.byte.com
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*
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*******************************************************************************
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* Modification Log:
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* May 12, 1989 - modified empty loops to avoid nullifying by optimizing
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* compilers
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* August 28, 1990 - changed timing relationship--now returns total number
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* of iterations (ty)
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* November 9, 1990 - made changes suggested by Keith Cantrell
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* (digi!kcantrel) to defeat optimization
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* to non-existence
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* October 22, 1997 - code cleanup to remove ANSI C compiler warnings
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* Andy Kahn <kahn@zk3.dec.com>
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*
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******************************************************************************/
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char SCCSid[] = "@(#) @(#)arith.c:3.3 -- 5/15/91 19:30:19";
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/*
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* arithmetic test
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include "timeit.c"
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int dumb_stuff(int);
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unsigned long iter;
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/* this function is called when the alarm expires */
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void report(int sig)
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{
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fprintf(stderr,"COUNT|%ld|1|lps\n", iter);
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exit(0);
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}
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int main(int argc, char *argv[])
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{
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int duration;
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int result = 0;
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if (argc != 2) {
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printf("Usage: %s duration\n", argv[0]);
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exit(1);
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}
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duration = atoi(argv[1]);
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/* set up alarm call */
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iter = 0; /* init iteration count */
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wake_me(duration, report);
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/* this loop will be interrupted by the alarm call */
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while (1)
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{
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/* in switching to time-based (instead of iteration-based),
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the following statement was added. It should not skew
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the timings too much--there was an increment and test
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in the "while" expression above. The only difference is
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that now we're incrementing a long instead of an int. (ty) */
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++iter;
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/* the loop calls a function to insure that something is done
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the results of the function are fed back in (just so they
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they won't be thrown away. A loop with
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unused assignments may get optimized out of existence */
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result = dumb_stuff(result);
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}
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}
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/************************** dumb_stuff *******************/
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int dumb_stuff(i)
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int i;
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{
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#ifndef arithoh
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datum x, y, z;
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z = 0;
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#endif
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/*
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* 101
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* sum i*i/(i*i-1)
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* i=2
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*/
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/* notice that the i value is always reset by the loop */
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for (i=2; i<=101; i++)
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{
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#ifndef arithoh
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x = i;
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y = x*x;
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z += y/(y-1);
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}
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return(x+y+z);
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#else
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}
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return(0);
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#endif
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}
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