dhryst~1.c

操作系统源代码

/* dhrystone - benchmark program */

#define REGISTER
/*
 *
 *	"DHRYSTONE" Benchmark Program
 *
 *	Version:	C/1.1, 12/01/84
 *
 *	Date:		PROGRAM updated 01/06/86, COMMENTS changed 01/31/87
 *
 *	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.  Be careful to
 *			adjust the HZ parameter below for the units which
 *			are returned by your times(2) function.  You can
 *			sometimes find this in <sys/param.h>.  If you have
 *			neither time(2) nor times(2), use a stopwatch in
 *			the dead of the 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!castor!pcrat!rick
 *
 *			and thanks to all that do.
 *
 *	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.
 *
 *	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.
 *
 */


#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

/* Accuracy of timings and human fatigue controlled by next two lines */
/*#define LOOPS	50000	*/	/* Use this for slow or 16 bit machines */
/*#define LOOPS	500000 */	/* Use this for faster machines */
/*#define LOOPS	(sizeof(int) == 2 ? 50000 : 1000000)*/

/* Seconds to run */
#define SECONDS	15

/* Compiler dependent options */
#define	NOENUM			/* Define if compiler has no enum's */
/* #define 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 */


#ifdef TIME
/* Ganularity of time(2) is of course 1 second */
#define HZ	1
#endif

#ifdef TIMES
/* Define the granularity of your times(2) function */
/*#define HZ	50 */		/* times(2) returns 1/50 second (europe?) */
#define HZ	60		/* times(2) returns 1/60 second (most) */
/*#define HZ	100 	*/	/* times(2) returns 1/100 second (WECo) */
#endif

/* For compatibility with goofed up version */
/*#undef GOOF		*/	/* Define if you want the goofed up version */


#ifdef GOOF
char Version[] = "1.0";
#else
char Version[] = "1.1";
#endif


#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;

#ifdef NULL
#undef NULL
#endif

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

#ifndef REG
#define	REG
#endif


#ifdef TIMES
#include <sys/times.h>
#endif

_PROTOTYPE(int main, (void));
_PROTOTYPE(void prep_timer, (void));
_PROTOTYPE(void timeout, (int sig));
_PROTOTYPE(void Proc0, (void));
_PROTOTYPE(void Proc1, (RecordPtr PtrParIn));
_PROTOTYPE(void Proc2, (OneToFifty *IntParIO));
_PROTOTYPE(void Proc3, (RecordPtr *PtrParOut));
_PROTOTYPE(void Proc4, (void));
_PROTOTYPE(void Proc5, (void));
_PROTOTYPE(void Proc6, (Enumeration EnumParIn, Enumeration *EnumParOut));
_PROTOTYPE(void Proc7, (OneToFifty IntParI1, OneToFifty IntParI2, 
						OneToFifty *IntParOut));
_PROTOTYPE(void Proc8, (Array1Dim Array1Par, Array2Dim Array2Par, 
				OneToFifty IntParI1, OneToFifty IntParI2));
/*_PROTOTYPE(Enumeration Func1,(CapitalLetter CharPar1, CapitalLetter CharPar2));*/
_PROTOTYPE(boolean Func2, (String30 StrParI1, String30 StrParI2));
_PROTOTYPE(boolean Func3, (Enumeration EnumParIn));

_PROTOTYPE(Enumeration Func1, (int CharPar1, int CharPar2));


int main()
{
  Proc0();
  return(0);
}


#if __STDC__
volatile int done;
#else
int done;
#endif

void prep_timer()
{
  signal(SIGALRM, timeout);
  done = 0;
}

void timeout(sig)
int sig;
{
  done = 1;
}

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


void Proc0()
{
  OneToFifty IntLoc1;
  REG OneToFifty IntLoc2;
  OneToFifty IntLoc3;
  REG char CharIndex;
  Enumeration EnumLoc;
  String30 String1Loc;
  String30 String2Loc;
  register unsigned long i;
  unsigned long starttime;
  unsigned long benchtime;
  unsigned long nulltime;
  unsigned long nullloops;
  unsigned long benchloops;
#ifdef TIMES
  struct tms tms;
#endif

  i = 0;
  prep_timer();

#ifdef TIME
  starttime = time((long *) 0);
#endif

#ifdef TIMES
  times(&tms);
  starttime = tms.tms_utime;
#endif

  alarm(1);
  while (!done) i++;

#ifdef TIME
  nulltime = time((long *) 0) - starttime;	/* Computes o'head of loop */
#endif

#ifdef TIMES
  times(&tms);
  nulltime = tms.tms_utime - starttime;	/* Computes overhead of looping */
#endif

  nullloops = i;


  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");
#ifndef	GOOF
  strcpy(String1Loc, "DHRYSTONE PROGRAM, 1'ST STRING");	/* GOOF */
#endif

  Array2Glob[8][7] = 10;	/* Was missing in published program */


/*****************
-- Start Timer --
*****************/
  i = 0;
  prep_timer();

#ifdef TIME
  starttime = time((long *) 0);
#endif

#ifdef TIMES
  times(&tms);
  starttime = tms.tms_utime;
#endif

  alarm(SECONDS);
  while (!done) {
	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 TIME
  benchtime = time((long *) 0) - starttime;
#endif

#ifdef TIMES
  times(&tms);
  benchtime = tms.tms_utime - starttime;
#endif
  benchloops = i;

  /* Approximately correct benchtime to the nulltime. */
  benchtime -= nulltime / (nullloops / benchloops);

  printf("Dhrystone(%s) time for %lu passes = %lu.%02lu\n",
         Version,
         benchloops, benchtime / HZ, benchtime % HZ * 100 / HZ);
  printf("This machine benchmarks at %lu dhrystones/second\n",
         benchloops * HZ / benchtime);
}


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


  structassign(NextRecord, *PtrGlb);
  PtrParIn->IntComp = 5;
  NextRecord.IntComp = PtrParIn->IntComp;
  NextRecord.PtrComp = PtrParIn->PtrComp;
  Proc3((RecordPtr *)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
}


void 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;
  }
}


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


void Proc4()
{
  REG boolean BoolLoc;


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


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


void 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;
}
}


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


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


void 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;
register int l;
{
  while (l--) *d++ = *s++;
}

#endif