dhry_1.c

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

/*
 ****************************************************************************
 *
 *                   "DHRYSTONE" Benchmark Program
 *                   -----------------------------
 *
 *  Version:    C, Version 2.1
 *
 *  File:       dhry_1.c (part 2 of 3)
 *
 *  Date:       May 25, 1988
 *
 *  Author:     Reinhold P. Weicker
 *
 ****************************************************************************
 */

#include <string.h>
#include <stdlib.h>
#include "dhry.h"


/* Global Variables: */

Rec_Pointer     Ptr_Glob,
                Next_Ptr_Glob;
int             Int_Glob;
Boolean         Bool_Glob;
char            Ch_1_Glob,
                Ch_2_Glob;
int             Arr_1_Glob [50];
int             Arr_2_Glob [50] [50];

//extern char     *malloc (int i );
extern Enumeration Func_1 (Capital_Letter Ch_1_Par_Val, Capital_Letter Ch_2_Par_Val);
extern Boolean Func_2 (Str_30  Str_1_Par_Ref, Str_30  Str_2_Par_Ref) ;
  /* forward declaration necessary since Enumeration may not simply be int */
extern Boolean Func_3 (Enumeration Enum_Par_Val);
extern void Proc_6 ( Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par) ;
extern void Proc_7 ( One_Fifty Int_1_Par_Val,
              One_Fifty Int_2_Par_Val,
              One_Fifty *Int_Par_Ref ) ;
extern void Proc_8 ( Arr_1_Dim Arr_1_Par_Ref,
              Arr_2_Dim Arr_2_Par_Ref,
              int Int_1_Par_Val,
              int Int_2_Par_Val) ;
void Proc_1 (Rec_Pointer Ptr_Val_Par) ;
void Proc_2 (One_Fifty *Int_Par_Ref) ;
void Proc_3 (Rec_Pointer *Ptr_Ref_Par) ;
void Proc_4 ( void ) ;
void Proc_5 ( void ) ;


#ifndef REG
        Boolean Reg = false;
#define REG
        /* REG becomes defined as empty */
        /* i.e. no register variables   */
#else
        Boolean Reg = true;
#endif

/* variables for time measurement: */
long            Begin_Time,
                End_Time,
                User_Time;
float           Microseconds,
                Dhrystones_Per_Second;

/* end of variables for time measurement */


void Proc_1 (Rec_Pointer Ptr_Val_Par)
/******************/

    /* executed once */
{
    REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;
                                        /* == Ptr_Glob_Next */
    /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
    /* corresponds to "rename" in Ada, "with" in Pascal           */

    structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob);
    Ptr_Val_Par->variant.var_1.Int_Comp = 5;
    Next_Record->variant.var_1.Int_Comp = Ptr_Val_Par->variant.var_1.Int_Comp;
    Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
    Proc_3 (&Next_Record->Ptr_Comp);
    /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp == Ptr_Glob->Ptr_Comp */
    if (Next_Record->Discr == Ident_1)
    {
        Next_Record->variant.var_1.Int_Comp = 6;
        Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp,
                &Next_Record->variant.var_1.Enum_Comp);
        Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
        Proc_7 (Next_Record->variant.var_1.Int_Comp, 10,
                &Next_Record->variant.var_1.Int_Comp);
    }
    else
        structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
} /* Proc_1 */


void Proc_2 (One_Fifty *Int_Par_Ref)
/******************/
    /* executed once */
    /* *Int_Par_Ref == 1, becomes 4 */

{
    One_Fifty  Int_Loc;
    Enumeration   Enum_Loc;

    Int_Loc = *Int_Par_Ref + 10;
    do /* executed once */
        if (Ch_1_Glob == 'A')
        {
            Int_Loc -= 1;
            *Int_Par_Ref = Int_Loc - Int_Glob;
            Enum_Loc = Ident_1;
        }
    while (Enum_Loc != Ident_1); /* true */
} /* Proc_2 */


void Proc_3 (Rec_Pointer *Ptr_Ref_Par)
/******************/
    /* executed once */
    /* Ptr_Ref_Par becomes Ptr_Glob */
{
    if (Ptr_Glob != Null)
        *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
    Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
} /* Proc_3 */


void Proc_4 ( void )
/*******/
    /* executed once */
{
    Boolean Bool_Loc;

    Bool_Loc = Ch_1_Glob == 'A';
    Bool_Glob = Bool_Loc | Bool_Glob;
    Ch_2_Glob = 'B';
} /* Proc_4 */


void Proc_5 ( void )
/*******/
{
    Ch_1_Glob = 'A';
    Bool_Glob = false;
} /* Proc_5 */


//int main ( void )
void testloop ( int Number_Of_Runs )
/*****/

/* main program, corresponds to procedures        */
/* Main and Proc_0 in the Ada version             */
{
    One_Fifty       Int_1_Loc;
    REG One_Fifty   Int_2_Loc;
    One_Fifty       Int_3_Loc;
    REG char        Ch_Index;
    Enumeration     Enum_Loc;
    Str_30          Str_1_Loc;
    Str_30          Str_2_Loc;
    REG int         Run_Index;
  

    /* Initializations */
    Next_Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));
    Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));

    Ptr_Glob->Ptr_Comp                    = Next_Ptr_Glob;
    Ptr_Glob->Discr                       = Ident_1;
    Ptr_Glob->variant.var_1.Enum_Comp     = Ident_3;
    Ptr_Glob->variant.var_1.Int_Comp      = 40;
    strcpy (Ptr_Glob->variant.var_1.Str_Comp,
            "DHRYSTONE PROGRAM, SOME STRING");
    strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");

    Arr_2_Glob [8][7] = 10;
        /* Was missing in published program. Without this statement,    */
        /* Arr_2_Glob [8][7] would have an undefined value.             */
        /* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
        /* overflow may occur for this array element.                   */


    /***************/
    /* Start loop */
    /***************/

    for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index)
    {
        Proc_5();
        Proc_4();
        /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
        Int_1_Loc = 2;
        Int_2_Loc = 3;
        strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
        Enum_Loc = Ident_2;
        Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc);
        /* Bool_Glob == 1 */
        while (Int_1_Loc < Int_2_Loc)  /* loop body executed once */
        {
            Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
            /* Int_3_Loc == 7 */
            Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc);
            /* Int_3_Loc == 7 */
            Int_1_Loc += 1;
        } /* while */
        /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
        Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
        /* Int_Glob == 5 */
        Proc_1 (Ptr_Glob);
        for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index)
                             /* loop body executed twice */
        {
            if (Enum_Loc == Func_1 (Ch_Index, 'C'))
            /* then, not executed */
            {
                Proc_6 (Ident_1, &Enum_Loc);
                strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
                Int_2_Loc = Run_Index;
                Int_Glob = Run_Index;
            }
        }
        /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
        Int_2_Loc = Int_2_Loc * Int_1_Loc;
        Int_1_Loc = Int_2_Loc / Int_3_Loc;
        Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
        /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
        Proc_2 (&Int_1_Loc);
        /* Int_1_Loc == 5 */

    } /* loop "for Run_Index" */

}