dhry_2.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_2.c (part 3 of 3)
 *
 *  Date:       May 25, 1988
 *
 *  Author:     Reinhold P. Weicker
 *
 ****************************************************************************
 */

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

#ifndef REG
#define REG
        /* REG becomes defined as empty */
        /* i.e. no register variables   */
#endif

extern  int     Int_Glob;
extern  char    Ch_1_Glob;

Boolean Func_3 (Enumeration Enum_Par_Val)
/***************************/
    /* executed once        */
    /* Enum_Par_Val == Ident_3 */
{
    Enumeration Enum_Loc;

    Enum_Loc = Enum_Par_Val;
    if (Enum_Loc == Ident_3)
        return (true);
    else /* not executed */
        return (false);
} /* Func_3 */

void Proc_6 ( Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par)
/*********************************/
    /* executed once */
    /* Enum_Val_Par == Ident_3, Enum_Ref_Par becomes Ident_2 */
{
    *Enum_Ref_Par = Enum_Val_Par;
    if (! Func_3 (Enum_Val_Par))
        /* then, not executed */
        *Enum_Ref_Par = Ident_4;
    switch (Enum_Val_Par)
    {
        case Ident_1:
            *Enum_Ref_Par = Ident_1;
            break;
        case Ident_2:
            if (Int_Glob > 100)
                *Enum_Ref_Par = Ident_1;
            else 
                *Enum_Ref_Par = Ident_4;
            break;
        case Ident_3: /* executed */
            *Enum_Ref_Par = Ident_2;
            break;
        case Ident_4: 
            break;
        case Ident_5:
            *Enum_Ref_Par = Ident_3;
            break;
    } /* switch */
} /* Proc_6 */


void Proc_7 ( One_Fifty Int_1_Par_Val, 
              One_Fifty Int_2_Par_Val, 
              One_Fifty *Int_Par_Ref )
/**********************************************/
    /* executed three times                                      */
    /* first call:      Int_1_Par_Val == 2, Int_2_Par_Val == 3,  */
    /*                  Int_Par_Ref becomes 7                    */
    /* second call:     Int_1_Par_Val == 10, Int_2_Par_Val == 5, */
    /*                  Int_Par_Ref becomes 17                   */
    /* third call:      Int_1_Par_Val == 6, Int_2_Par_Val == 10, */
    /*                  Int_Par_Ref becomes 18                   */
{
    One_Fifty Int_Loc;

    Int_Loc = Int_1_Par_Val + 2;
    *Int_Par_Ref = Int_2_Par_Val + Int_Loc;
} /* Proc_7 */


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)
/*********************************************************************/
    /* executed once      */
    /* Int_Par_Val_1 == 3 */
    /* Int_Par_Val_2 == 7 */
{
  REG One_Fifty Int_Index;
  REG One_Fifty Int_Loc;

    Int_Loc = Int_1_Par_Val + 5;
    Arr_1_Par_Ref [Int_Loc] = Int_2_Par_Val;
    Arr_1_Par_Ref [Int_Loc+1] = Arr_1_Par_Ref [Int_Loc];
    Arr_1_Par_Ref [Int_Loc+30] = Int_Loc;
    for (Int_Index = Int_Loc; Int_Index <= Int_Loc+1; ++Int_Index)
        Arr_2_Par_Ref [Int_Loc] [Int_Index] = Int_Loc;
    Arr_2_Par_Ref [Int_Loc] [Int_Loc-1] += 1;
    Arr_2_Par_Ref [Int_Loc+20] [Int_Loc] = Arr_1_Par_Ref [Int_Loc];
    Int_Glob = 5;
} /* Proc_8 */


Enumeration Func_1 (Capital_Letter Ch_1_Par_Val, Capital_Letter Ch_2_Par_Val)
/*************************************************/
    /* executed three times                                         */
    /* first call:      Ch_1_Par_Val == 'H', Ch_2_Par_Val == 'R'    */
    /* second call:     Ch_1_Par_Val == 'A', Ch_2_Par_Val == 'C'    */
    /* third call:      Ch_1_Par_Val == 'B', Ch_2_Par_Val == 'C'    */
{
    Capital_Letter        Ch_1_Loc;
    Capital_Letter        Ch_2_Loc;

    Ch_1_Loc = Ch_1_Par_Val;
    Ch_2_Loc = Ch_1_Loc;
    if (Ch_2_Loc != Ch_2_Par_Val)
    /* then, executed */
        return (Ident_1);
    else  /* not executed */
    {
        Ch_1_Glob = Ch_1_Loc;
        return (Ident_2);
    }
} /* Func_1 */


Boolean Func_2 (Str_30  Str_1_Par_Ref, Str_30  Str_2_Par_Ref)
/*************************************************/
    /* executed once */
    /* Str_1_Par_Ref == "DHRYSTONE PROGRAM, 1'ST STRING" */
    /* Str_2_Par_Ref == "DHRYSTONE PROGRAM, 2'ND STRING" */

{
    REG One_Thirty      Int_Loc;
    Capital_Letter      Ch_Loc;

    Int_Loc = 2;
    while (Int_Loc <= 2) /* loop body executed once */
    if (Func_1 (Str_1_Par_Ref[Int_Loc],
                Str_2_Par_Ref[Int_Loc+1]) == Ident_1)
    /* then, executed */
    {
        Ch_Loc = 'A';
        Int_Loc += 1;
    } /* if, while */

    if (Ch_Loc >= 'W' && Ch_Loc < 'Z')
    /* then, not executed */
    Int_Loc = 7;
    if (Ch_Loc == 'R')
    /* then, not executed */
    return (true);
    else /* executed */
    {
        if (strcmp (Str_1_Par_Ref, Str_2_Par_Ref) > 0)
        /* then, not executed */
        {
            Int_Loc += 7;
            Int_Glob = Int_Loc;
            return (true);
        }
        else /* executed */
            return (false);
    } /* if Ch_Loc */
} /* Func_2 */