Category : C Source Code
Archive   : CBENCH.ZIP
Filename : DRY.C

/*
* "DHRYSTONE" Benchmark Program
*
* This version of the program has been modified in the following ways:
*
* 1. The "results table" has been removed.
* 2. The program is designed to be called from a higher level
* driver program with one argument, the loop count. ("main"
* has been changed to "dry".)
* 3. The timing mechanism has been changed. It now calls a
* routine, timestart, to start the timer and another, timend
* to get the total runtime (in tenths of a second).
* 4. Some of the defined options have been set in constant
* ways:
*
* - Register variables are always used. (If a compiler
* doesn't support them, it will run slower. If a
* compiler won't accept them, that fact should be
* noted.)
* - No structure assignments or enumerated types are
* used.
*
*
* Version: C/1, 12/01/84
*
* Date: PROGRAM updated 11/02/85, RESULTS updated 12/13/85
*
* Author: Reinhold P. Weicker, CACM Vol 27, No 10, 10/84 pg. 1013
*
* Translated from ADA by Rick Richardson
* Every method to preserve ADA-likeness has been used,
* at the expense of C-ness.
*
* Compile: cc -O dry.c -o drynr : No registers
* cc -O -DREG=register dry.c -o dryr : Registers
*
* Defines: Defines are provided for old C compiler's
* which don't have enums, and can't assign structures.
* The time(2) function is library dependant; Most
* return the time in seconds, but beware of some, like
* Aztec C, which return other units.
* The LOOPS define is initially set for 50000 loops.
* If you have a machine with large integers and is
* very fast, please change this number to 500000 to
* get better accuracy. Please select the way to
* measure the execution time using the TIME define.
* For single user machines, time(2) is adequate. For
* multi-user machines where you cannot get single-user
* access, use the times(2) function. If you have
* neither, use a stopwatch in the dead of night.
* Use a "printf" at the point marked "start timer"
* to begin your timings. DO NOT use the UNIX "time(1)"
* command, as this will measure the total time to
* run this program, which will (erroneously) include
* the time to malloc(3) storage and to compute the
* time it takes to do nothing.
*
* Run: drynr; dryr
*
* Results: If you get any new machine/OS results, please send to:
*
* {ihnp4,vax135,..}!houxm!castor!pcrat!rer
*
* and thanks to all that do. Space prevents listing
* the names of those who have provided some of these
* results.
*
* Note: I order the list in increasing performance of the
* "with registers" benchmark. If the compiler doesn't
* provide register variables, then the benchmark
* is the same for both REG and NOREG. I'm not going
* to list a compiler in a better place because if it
* had register variables it might do better. No
* register variables is a big loss in my book.
*
* PLEASE: Send complete information about the machine type,
* clock speed, OS and C manufacturer/version. If
* the machine is modified, tell me what was done.
* On UNIX, execute uname -a and cc -V to get this info.
*
* 80x8x NOTE: 80x8x benchers: please try to do all memory models
* for a particular compiler.
*
*
* The following program contains statements of a high-level programming
* language (C) in a distribution considered representative:
*
* assignments 53%
* control statements 32%
* procedure, function calls 15%
*
* 100 statements are dynamically executed. The program is balanced with
* respect to the three aspects:
* - statement type
* - operand type (for simple data types)
* - operand access
* operand global, local, parameter, or constant.
*
* The combination of these three aspects is balanced only approximately.
*
* The program does not compute anything meaningfull, but it is
* syntactically and semantically correct.
*
*/


/* Put in for the MS-DOS version. --djk
*/
#define MSDOSTIME
#define REG register

#undef TIMES
#undef TIME
#undef LOOPS

#if MICROSOFT
#undef NOENUM /* Microsoft does enumerated types */
#undef NOSTRUCTASSIGN /* and structure assignments */
#else
#undef NOENUM /* Assume enumerated types */
#undef NOSTRUCTASSIGN /* Assume structure assignments */
#endif



#if 0 /* Turned all of the below off. -- djk */

/* Accuracy of timings and human fatigue controlled by next two lines.
** NOTE: This count is now passed in from a higher level.
*/
#define LOOPS 50000 /* Use this for slow or 16 bit machines */
/*#define LOOPS 500000 /* Use this for faster machines */


/* Compiler dependent options */
#define NOENUM /* Define if compiler has no enum's */
#define NOSTRUCTASSIGN /* Define if compiler can't assign structures */

#undef NOENUM /* Define if compiler has no enum's */
#undef NOSTRUCTASSIGN /* Define if compiler can't assign structures */



/* define only one of the next two defines */
#define TIMES /* Use times(2) time function */
#define TIME /* Use time(2) time function */


/* define the granularity of your times(2) function (when used) */
#define HZ 60 /* times(2) returns 1/60 second (most) */
/*#define HZ 100 /* times(2) returns 1/100 second (WECo) */


#ifndef REG
#define REG
#endif

#endif /* Turned all of the above off. -- djk */



#ifdef NOSTRUCTASSIGN
#define structassign(d, s) memcpy(&(d), &(s), sizeof(d))
#else
#define structassign(d, s) d = s
#endif

#ifdef NOENUM
#define Ident1 1
#define Ident2 2
#define Ident3 3
#define Ident4 4
#define Ident5 5
typedef int Enumeration;
#else
typedef enum {Ident1, Ident2, Ident3, Ident4, Ident5} Enumeration;
#endif

typedef int OneToThirty;
typedef int OneToFifty;
typedef char CapitalLetter;
typedef char String30[31];
typedef int Array1Dim[51];
typedef int Array2Dim[51][51];

struct Record
{
struct Record *PtrComp;
Enumeration Discr;
Enumeration EnumComp;
OneToFifty IntComp;
String30 StringComp;
};

typedef struct Record RecordType;
typedef RecordType * RecordPtr;
typedef int boolean;

#define NULL 0
#define TRUE 1
#define FALSE 0

extern Enumeration Func1();
extern boolean Func2();

#ifdef TIMES
#include
#include
#endif


int dry (lpcnt)
unsigned int lpcnt;
{
#if 1
return (Proc0(lpcnt));
#else
Proc0(lpcnt);
exit(0);
#endif
}

/*
* Package 1
*/
int IntGlob;
boolean BoolGlob;
char Char1Glob;
char Char2Glob;
Array1Dim Array1Glob;
Array2Dim Array2Glob;
RecordPtr PtrGlb;
RecordPtr PtrGlbNext;

int Proc0(lpcnt)
unsigned int lpcnt;
{
OneToFifty IntLoc1;
REG OneToFifty IntLoc2;
OneToFifty IntLoc3;
REG char CharLoc;
REG char CharIndex;
Enumeration EnumLoc;
String30 String1Loc;
String30 String2Loc;
extern char *malloc();

#ifdef MSDOSTIME
unsigned int i;
#endif
#ifdef TIME
long time();
long starttime;
long benchtime;
long nulltime;
register unsigned int i;

starttime = time( (long *) 0);
for (i = 0; i < LOOPS; ++i);
nulltime = time( (long *) 0) - starttime; /* Computes o'head of loop */
#endif
#ifdef TIMES
time_t starttime;
time_t benchtime;
time_t nulltime;
struct tms tms;
register unsigned int i;

times(&tms); starttime = tms.tms_utime;
for (i = 0; i < LOOPS; ++i);
times(&tms);
nulltime = tms.tms_utime - starttime; /* Computes overhead of looping */

#endif

PtrGlbNext = (RecordPtr) malloc(sizeof(RecordType));
PtrGlb = (RecordPtr) malloc(sizeof(RecordType));
PtrGlb->PtrComp = PtrGlbNext;
PtrGlb->Discr = Ident1;
PtrGlb->EnumComp = Ident3;
PtrGlb->IntComp = 40;
strcpy(PtrGlb->StringComp, "DHRYSTONE PROGRAM, SOME STRING");

/*****************
-- Start Timer --
*****************/
#ifdef MSDOSTIME
timestart ();
#endif
#ifdef TIME
starttime = time( (long *) 0);
#endif
#ifdef TIMES
times(&tms); starttime = tms.tms_utime;
#endif
for (i = 0; i < lpcnt; ++i)
{

Proc5();
Proc4();
IntLoc1 = 2;
IntLoc2 = 3;
strcpy(String2Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
EnumLoc = Ident2;
BoolGlob = ! Func2(String1Loc, String2Loc);
while (IntLoc1 < IntLoc2)
{
IntLoc3 = 5 * IntLoc1 - IntLoc2;
Proc7(IntLoc1, IntLoc2, &IntLoc3);
++IntLoc1;
}
Proc8(Array1Glob, Array2Glob, IntLoc1, IntLoc3);
Proc1(PtrGlb);
for (CharIndex = 'A'; CharIndex <= Char2Glob; ++CharIndex)
if (EnumLoc == Func1(CharIndex, 'C'))
Proc6(Ident1, &EnumLoc);
IntLoc3 = IntLoc2 * IntLoc1;
IntLoc2 = IntLoc3 / IntLoc1;
IntLoc2 = 7 * (IntLoc3 - IntLoc2) - IntLoc1;
Proc2(&IntLoc1);
}

/*****************
-- Stop Timer --
*****************/

#ifdef MSDOSTIME
return (timend ());
#endif
#ifdef TIME
benchtime = time( (long *) 0) - starttime - nulltime;
printf("Dhrystone time for %ld passes = %ld\n",
(long) LOOPS, benchtime);
printf("This machine benchmarks at %ld dhrystones/second\n",
((long) LOOPS) / benchtime);
#endif
#ifdef TIMES
times(&tms);
benchtime = tms.tms_utime - starttime - nulltime;
printf("Dhrystone time for %ld passes = %ld\n",
(long) LOOPS, benchtime/HZ);
printf("This machine benchmarks at %ld dhrystones/second\n",
((long) LOOPS) * HZ / benchtime);
#endif

}

Proc1(PtrParIn)
REG RecordPtr PtrParIn;
{
#define NextRecord (*(PtrParIn->PtrComp))

structassign(NextRecord, *PtrGlb);
PtrParIn->IntComp = 5;
NextRecord.IntComp = PtrParIn->IntComp;
NextRecord.PtrComp = PtrParIn->PtrComp;
Proc3(NextRecord.PtrComp);
if (NextRecord.Discr == Ident1)
{
NextRecord.IntComp = 6;
Proc6(PtrParIn->EnumComp, &NextRecord.EnumComp);
NextRecord.PtrComp = PtrGlb->PtrComp;
Proc7(NextRecord.IntComp, 10, &NextRecord.IntComp);
}
else
structassign(*PtrParIn, NextRecord);

#undef NextRecord
}

Proc2(IntParIO)
OneToFifty *IntParIO;
{
REG OneToFifty IntLoc;
REG Enumeration EnumLoc;

IntLoc = *IntParIO + 10;
for(;;)
{
if (Char1Glob == 'A')
{
--IntLoc;
*IntParIO = IntLoc - IntGlob;
EnumLoc = Ident1;
}
if (EnumLoc == Ident1)

break;
}
}

Proc3(PtrParOut)
RecordPtr *PtrParOut;
{
if (PtrGlb != NULL)
*PtrParOut = PtrGlb->PtrComp;
else
IntGlob = 100;
Proc7(10, IntGlob, &PtrGlb->IntComp);
}

Proc4()
{
REG boolean BoolLoc;

BoolLoc = Char1Glob == 'A';
BoolLoc |= BoolGlob;
Char2Glob = 'B';
}

Proc5()
{
Char1Glob = 'A';
BoolGlob = FALSE;
}

extern boolean Func3();

Proc6(EnumParIn, EnumParOut)
REG Enumeration EnumParIn;
REG Enumeration *EnumParOut;
{
*EnumParOut = EnumParIn;
if (! Func3(EnumParIn) )
*EnumParOut = Ident4;
switch (EnumParIn)
{
case Ident1: *EnumParOut = Ident1; break;
case Ident2: if (IntGlob > 100) *EnumParOut = Ident1;
else *EnumParOut = Ident4;
break;
case Ident3: *EnumParOut = Ident2; break;
case Ident4: break;
case Ident5: *EnumParOut = Ident3;
}
}

Proc7(IntParI1, IntParI2, IntParOut)
OneToFifty IntParI1;
OneToFifty IntParI2;
OneToFifty *IntParOut;
{
REG OneToFifty IntLoc;

IntLoc = IntParI1 + 2;
*IntParOut = IntParI2 + IntLoc;
}

Proc8(Array1Par, Array2Par, IntParI1, IntParI2)
Array1Dim Array1Par;
Array2Dim Array2Par;
OneToFifty IntParI1;
OneToFifty IntParI2;
{
REG OneToFifty IntLoc;
REG OneToFifty IntIndex;

IntLoc = IntParI1 + 5;
Array1Par[IntLoc] = IntParI2;
Array1Par[IntLoc+1] = Array1Par[IntLoc];
Array1Par[IntLoc+30] = IntLoc;
for (IntIndex = IntLoc; IntIndex <= (IntLoc+1); ++IntIndex)
Array2Par[IntLoc][IntIndex] = IntLoc;
++Array2Par[IntLoc][IntLoc-1];
Array2Par[IntLoc+20][IntLoc] = Array1Par[IntLoc];
IntGlob = 5;
}

Enumeration Func1(CharPar1, CharPar2)
CapitalLetter CharPar1;
CapitalLetter CharPar2;
{
REG CapitalLetter CharLoc1;
REG CapitalLetter CharLoc2;

CharLoc1 = CharPar1;
CharLoc2 = CharLoc1;
if (CharLoc2 != CharPar2)
return (Ident1);
else
return (Ident2);
}

boolean Func2(StrParI1, StrParI2)
String30 StrParI1;
String30 StrParI2;
{
REG OneToThirty IntLoc;
REG CapitalLetter CharLoc;

IntLoc = 1;
while (IntLoc <= 1)
if (Func1(StrParI1[IntLoc], StrParI2[IntLoc+1]) == Ident1)
{
CharLoc = 'A';
++IntLoc;
}
if (CharLoc >= 'W' && CharLoc <= 'Z')
IntLoc = 7;
if (CharLoc == 'X')
return(TRUE);
else
{
if (strcmp(StrParI1, StrParI2) > 0)
{
IntLoc += 7;
return (TRUE);
}
else
return (FALSE);
}
}

boolean Func3(EnumParIn)
REG Enumeration EnumParIn;
{
REG Enumeration EnumLoc;

EnumLoc = EnumParIn;
if (EnumLoc == Ident3) return (TRUE);
return (FALSE);
}

#ifdef NOSTRUCTASSIGN
memcpy(d, s, l)
register char *d;
register char *s;
int l;
{
while (l--) *d++ = *s++;
}
#endif