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/*

 ****************************************************************************

 *

 *                   "DHRYSTONE" Benchmark Program

 *                   -----------------------------

 *

 *  Version:    C, Version 2.1

 *

 *  File:       dhry_1.c (part 2 of 3)

 *

 *  Date:       May 25, 1988

 *

 *  Author:     Reinhold P. Weicker

 *

 ****************************************************************************

 */

/*

  Original from https://github.com/sifive/benchmark-dhrystone

  Modified for the NEORV32 Processor

*/

#define TIME

#include <neorv32.h>

#include <string.h>

#include "dhry.h"

#ifndef DHRY_ITERS

#define DHRY_ITERS 10000

#endif

/* 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 ();

Enumeration     Func_1 ();

  /* forward declaration necessary since Enumeration may not simply be int */

#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: */

#ifdef TIMES

struct tms      time_info;

extern  int     times ();

                /* see library function "times" */

#define Too_Small_Time (2*HZ)

                /* Measurements should last at least about 2 seconds */

#endif

#ifdef TIME

extern long     time();

                /* see library function "time"  */

#define Too_Small_Time 2

                /* Measurements should last at least 2 seconds */

#endif

#ifdef MSC_CLOCK

extern clock_t  clock();

#define Too_Small_Time (2*HZ)

#endif

long            Begin_Time,

                End_Time,

                User_Time;

float           Microseconds,

                Dhrystones_Per_Second;

/* end of variables for time measurement */

int main (void)

/*****/

  /* 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;

  REG   int             Number_Of_Runs;

  { /* *****  NEORV32-SPECIFIC ***** */

    neorv32_cpu_dint(); // no interrupt, thanks

    neorv32_rte_setup(); // capture all exceptions and give debug information, ho hw flow control

    neorv32_uart0_setup(19200, PARITY_NONE, FLOW_CONTROL_NONE);

    // check available hardware extensions and compare with compiler flags

    neorv32_rte_check_isa(0); // silent = 0 -> show message if isa mismatch

    neorv32_uart0_printf("NEORV32: Processor running at %u Hz\n", (uint32_t)NEORV32_SYSINFO.CLK);

    neorv32_uart0_printf("NEORV32: Executing Dhrystone (%u iterations). This may take some time...\n\n", (uint32_t)DHRY_ITERS);

    // clear cycle counter

    neorv32_cpu_set_mcycle(0);

#ifndef RUN_DHRYSTONE

    #warning DHRYSTONE HAS NOT BEEN COMPILED! Use >>make USER_FLAGS+=-DRUN_DHRYSTONE clean_all exe<< to compile it.

    // inform the user if you are actually executing this

    neorv32_uart0_printf("ERROR! CoreMark has not been compiled. Use >>make USER_FLAGS+=-DRUN_COREMARK clean_all exe<< to compile it.\n");

    while(1);

#endif

  } /* ***** /NEORV32-SPECIFIC ***** */

  /* Initializations */

  { /* *****  NEORV32-SPECIFIC ***** */

    // use static memory allocation, no dynamic malloc

    //Next_Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));

    //Ptr_Glob = (Rec_Pointer) malloc (sizeof (Rec_Type));

    static Rec_Type Rec_Type_v0, Rec_Type_v1;

    Next_Ptr_Glob = &Rec_Type_v0;

    Ptr_Glob = &Rec_Type_v1;

  } /* ***** /NEORV32-SPECIFIC ***** */

  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.                   */

  neorv32_uart0_printf ("\n");

  neorv32_uart0_printf ("Dhrystone Benchmark, Version 2.1 (Language: C)\n");

  neorv32_uart0_printf ("\n");

  if (Reg)

  {

    neorv32_uart0_printf ("Program compiled with 'register' attribute\n");

    neorv32_uart0_printf ("\n");

  }

  else

  {

    neorv32_uart0_printf ("Program compiled without 'register' attribute\n");

    neorv32_uart0_printf ("\n");

  }

#ifdef DHRY_ITERS

  Number_Of_Runs = DHRY_ITERS;

#else

  neorv32_uart0_printf ("Please give the number of runs through the benchmark: ");

  {

    int n;

    scanf ("%d", &n);

    Number_Of_Runs = n;

  }

  neorv32_uart0_printf ("\n");

#endif

  neorv32_uart0_printf ("Execution starts, %u runs through Dhrystone\n", (uint32_t)Number_Of_Runs);

  /***************/

  /* Start timer */

  /***************/

/*

#ifdef TIMES

  times (&time_info);

  Begin_Time = (long) time_info.tms_utime;

#endif

#ifdef TIME

  Begin_Time = time ( (long *) 0);

#endif

#ifdef MSC_CLOCK

  Begin_Time = clock();

#endif

*/

  { /* *****  NEORV32-SPECIFIC ***** */

    Begin_Time = (long)neorv32_cpu_get_systime();

  } /* ***** /NEORV32-SPECIFIC ***** */

  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" */

  /**************/

  /* Stop timer */

  /**************/

/*

#ifdef TIMES

  times (&time_info);

  End_Time = (long) time_info.tms_utime;

#endif

#ifdef TIME

  End_Time = time ( (long *) 0);

#endif

#ifdef MSC_CLOCK

  End_Time = clock();

#endif

*/

  { /* *****  NEORV32-SPECIFIC ***** */

    End_Time = (long)neorv32_cpu_get_systime();

  } /* ***** /NEORV32-SPECIFIC ***** */

  neorv32_uart0_printf ("Execution ends\n");

  neorv32_uart0_printf ("\n");

  neorv32_uart0_printf ("Final values of the variables used in the benchmark:\n");

  neorv32_uart0_printf ("\n");

  neorv32_uart0_printf ("Int_Glob:            %u\n", (uint32_t)Int_Glob);

  neorv32_uart0_printf ("        should be:   %u\n", 5);

  neorv32_uart0_printf ("Bool_Glob:           %u\n", (uint32_t)Bool_Glob);

  neorv32_uart0_printf ("        should be:   %u\n", 1);

  neorv32_uart0_printf ("Ch_1_Glob:           %c\n", (uint32_t)Ch_1_Glob);

  neorv32_uart0_printf ("        should be:   %c\n", 'A');

  neorv32_uart0_printf ("Ch_2_Glob:           %c\n", (uint32_t)Ch_2_Glob);

  neorv32_uart0_printf ("        should be:   %c\n", 'B');

  neorv32_uart0_printf ("Arr_1_Glob[8]:       %u\n", (uint32_t)Arr_1_Glob[8]);

  neorv32_uart0_printf ("        should be:   %u\n", 7);

  neorv32_uart0_printf ("Arr_2_Glob[8][7]:    %u\n", (uint32_t)Arr_2_Glob[8][7]);

  neorv32_uart0_printf ("        should be:   Number_Of_Runs + 10\n");

  neorv32_uart0_printf ("Ptr_Glob->\n");

  neorv32_uart0_printf ("  Ptr_Comp:          %u\n", (uint32_t) Ptr_Glob->Ptr_Comp);

  neorv32_uart0_printf ("        should be:   (implementation-dependent)\n");

  neorv32_uart0_printf ("  Discr:             %u\n", (uint32_t)Ptr_Glob->Discr);

  neorv32_uart0_printf ("        should be:   %u\n", 0);

  neorv32_uart0_printf ("  Enum_Comp:         %u\n", (uint32_t)Ptr_Glob->variant.var_1.Enum_Comp);

  neorv32_uart0_printf ("        should be:   %u\n", 2);

  neorv32_uart0_printf ("  Int_Comp:          %u\n", (uint32_t)Ptr_Glob->variant.var_1.Int_Comp);

  neorv32_uart0_printf ("        should be:   %u\n", 17);

  neorv32_uart0_printf ("  Str_Comp:          %s\n", Ptr_Glob->variant.var_1.Str_Comp);

  neorv32_uart0_printf ("        should be:   DHRYSTONE PROGRAM, SOME STRING\n");

  neorv32_uart0_printf ("Next_Ptr_Glob->\n");

  neorv32_uart0_printf ("  Ptr_Comp:          %u\n", (uint32_t) Next_Ptr_Glob->Ptr_Comp);

  neorv32_uart0_printf ("        should be:   (implementation-dependent), same as above\n");

  neorv32_uart0_printf ("  Discr:             %u\n", (uint32_t)Next_Ptr_Glob->Discr);

  neorv32_uart0_printf ("        should be:   %u\n", 0);

  neorv32_uart0_printf ("  Enum_Comp:         %u\n", (uint32_t)Next_Ptr_Glob->variant.var_1.Enum_Comp);

  neorv32_uart0_printf ("        should be:   %u\n", 1);

  neorv32_uart0_printf ("  Int_Comp:          %u\n", (uint32_t)Next_Ptr_Glob->variant.var_1.Int_Comp);

  neorv32_uart0_printf ("        should be:   %u\n", 18);

  neorv32_uart0_printf ("  Str_Comp:          %s\n",

                                Next_Ptr_Glob->variant.var_1.Str_Comp);

  neorv32_uart0_printf ("        should be:   DHRYSTONE PROGRAM, SOME STRING\n");

  neorv32_uart0_printf ("Int_1_Loc:           %u\n", (uint32_t)Int_1_Loc);

  neorv32_uart0_printf ("        should be:   %u\n", 5);

  neorv32_uart0_printf ("Int_2_Loc:           %u\n", (uint32_t)Int_2_Loc);

  neorv32_uart0_printf ("        should be:   %u\n", 13);

  neorv32_uart0_printf ("Int_3_Loc:           %u\n", (uint32_t)Int_3_Loc);

  neorv32_uart0_printf ("        should be:   %u\n", 7);

  neorv32_uart0_printf ("Enum_Loc:            %u\n", (uint32_t)Enum_Loc);

  neorv32_uart0_printf ("        should be:   %u\n", 1);

  neorv32_uart0_printf ("Str_1_Loc:           %s\n", Str_1_Loc);

  neorv32_uart0_printf ("        should be:   DHRYSTONE PROGRAM, 1'ST STRING\n");

  neorv32_uart0_printf ("Str_2_Loc:           %s\n", Str_2_Loc);

  neorv32_uart0_printf ("        should be:   DHRYSTONE PROGRAM, 2'ND STRING\n");

  neorv32_uart0_printf ("\n");

  User_Time = End_Time - Begin_Time;

//  if (User_Time < Too_Small_Time)

//  {

//    neorv32_uart0_printf ("Measured time too small to obtain meaningful results\n");

//    neorv32_uart0_printf ("Please increase number of runs\n");

//    neorv32_uart0_printf ("\n");

//  }

//  else

  {

/*

#ifdef TIME

    Microseconds = (float) User_Time * Mic_secs_Per_Second

                        / (float) Number_Of_Runs;

    Dhrystones_Per_Second = (float) Number_Of_Runs / (float) User_Time;

#else

    Microseconds = (float) User_Time * Mic_secs_Per_Second

                        / ((float) HZ * ((float) Number_Of_Runs));

    Dhrystones_Per_Second = ((float) HZ * (float) Number_Of_Runs)

                        / (float) User_Time;

#endif

*/

    { /* *****  NEORV32-SPECIFIC ***** */

      neorv32_uart0_printf ("Microseconds for one run through Dhrystone: %u \n", (uint32_t)((User_Time * (Mic_secs_Per_Second / Number_Of_Runs)) / NEORV32_SYSINFO.CLK));

      uint32_t dhry_per_sec = (uint32_t)(NEORV32_SYSINFO.CLK / (User_Time / Number_Of_Runs));

      neorv32_uart0_printf ("Dhrystones per Second:                      %u \n\n", (uint32_t)dhry_per_sec);

      neorv32_uart0_printf("NEORV32: << DETAILED RESULTS (integer parts only) >>\n");

      neorv32_uart0_printf("NEORV32: Total cycles:      %u\n", (uint32_t)User_Time);

      neorv32_uart0_printf("NEORV32: Cycles per second: %u\n", (uint32_t)NEORV32_SYSINFO.CLK);

      neorv32_uart0_printf("NEORV32: Total runs:        %u\n", (uint32_t)Number_Of_Runs);

      neorv32_uart0_printf("\n");

      neorv32_uart0_printf("NEORV32: DMIPS/s:           %u\n", (uint32_t)dhry_per_sec);

      neorv32_uart0_printf("NEORV32: DMIPS/s/MHz:       %u\n", (uint32_t)(dhry_per_sec / (NEORV32_SYSINFO.CLK / 1000000)));

      neorv32_uart0_printf("\n");

      neorv32_uart0_printf("NEORV32: VAX DMIPS/s:       %u\n", (uint32_t)dhry_per_sec/1757);

      neorv32_uart0_printf("NEORV32: VAX DMIPS/s/MHz:   %u/1757\n", (uint32_t)(dhry_per_sec / (NEORV32_SYSINFO.CLK / 1000000)));

    } /* ***** /NEORV32-SPECIFIC ***** */

    /*

      neorv32_uart0_printf ("Microseconds for one run through Dhrystone: ");

      //neorv32_uart0_printf ("%6.1f \n", Microseconds);

      neorv32_uart0_printf ("%d \n", (int)Microseconds);

      neorv32_uart0_printf ("Dhrystones per Second:                      ");

      //neorv32_uart0_printf ("%6.1f \n", Dhrystones_Per_Second);

      neorv32_uart0_printf ("%d \n", (int)Dhrystones_Per_Second);

      neorv32_uart0_printf ("\n");

    */

  }

  return 0;

}

void Proc_1 (Ptr_Val_Par)

/******************/

REG 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)

    /* then, executed */

  {

    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 /* not executed */

    structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);

} /* Proc_1 */

void Proc_2 (Int_Par_Ref)

/******************/

    /* executed once */

    /* *Int_Par_Ref == 1, becomes 4 */

One_Fifty   *Int_Par_Ref;

{

  One_Fifty  Int_Loc;

  Enumeration   Enum_Loc;

  Int_Loc = *Int_Par_Ref + 10;

  do /* executed once */

    if (Ch_1_Glob == 'A')

      /* then, executed */

    {

      Int_Loc -= 1;

      *Int_Par_Ref = Int_Loc - Int_Glob;

      Enum_Loc = Ident_1;

    } /* if */

  while (Enum_Loc != Ident_1); /* true */

} /* Proc_2 */

void Proc_3 (Ptr_Ref_Par)

/******************/

    /* executed once */

    /* Ptr_Ref_Par becomes Ptr_Glob */

Rec_Pointer *Ptr_Ref_Par;

{

  if (Ptr_Glob != Null)

    /* then, executed */

    *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) /* without parameters */

/*******/

    /* 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) /* without parameters */

/*******/

    /* executed once */

{

  Ch_1_Glob = 'A';

  Bool_Glob = false;

} /* Proc_5 */

        /* Procedure for the assignment of structures,          */

        /* if the C compiler doesn't support this feature       */

#ifdef  NOSTRUCTASSIGN

memcpy (d, s, l)

register char   *d;

register char   *s;

register int    l;

{

        while (l--) *d++ = *s++;

}

#endif

/* Compare S1 and S2, returning less than, equal to or

   greater than zero if S1 is lexicographically less than,

   equal to or greater than S2. [from glibc] */

int strcmp(const char *p1, const char *p2)

{

  const unsigned char *s1 = (const unsigned char *) p1;

  const unsigned char *s2 = (const unsigned char *) p2;

  unsigned char c1, c2;

  do

    {

      c1 = (unsigned char) *s1++;

      c2 = (unsigned char) *s2++;

      if (c1 == '\0')

        return c1 - c2;

    }

  while (c1 == c2);

  return c1 - c2;

}