Quelle  dhry_1.c   Sprache: C

// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/*
 ****************************************************************************
 *
 *                   "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 "dhry.h"

#include <linux/ktime.h>
#include <linux/slab.h>
#include <linux/string.h>

/* Global Variables: */

int Int_Glob;
char Ch_1_Glob;

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

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


static void Proc_1(Rec_Pointer Ptr_Val_Par)
/******************/
/* executed once */
{
 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           */

 *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 */
  *Ptr_Val_Par = *Ptr_Val_Par->Ptr_Comp;
 }
} /* Proc_1 */


static 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') {
   /* 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 */


static 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 */


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


int dhry(int n)
/*****/

  /* main program, corresponds to procedures        */
  /* Main and Proc_0 in the Ada version             */
{
 One_Fifty Int_1_Loc;
 One_Fifty Int_2_Loc;
 One_Fifty Int_3_Loc;
 char Ch_Index;
 Enumeration Enum_Loc;
 Str_30 Str_1_Loc;
 Str_30 Str_2_Loc;
 int Run_Index;
 int Number_Of_Runs;
 ktime_t Begin_Time, End_Time;
 u32 User_Time;

 /* Initializations */

 Next_Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_ATOMIC);
 if (!Next_Ptr_Glob)
  return -ENOMEM;

 Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_ATOMIC);
 if (!Ptr_Glob) {
  kfree(Next_Ptr_Glob);
  return -ENOMEM;
 }

 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.                   */

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

 Number_Of_Runs = n;

 pr_debug("Execution starts, %d runs through Dhrystone\n",
   Number_Of_Runs);

 /***************/
 /* Start timer */
 /***************/

 Begin_Time = ktime_get();

 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 */
 /**************/

 End_Time = ktime_get();

#define dhry_assert_int_eq(val, expected)    \
 if (val != expected)      \
  pr_err("%s: %d (FAIL, expected %d)\n", #val, val, \
         expected);     \
 else        \
  pr_debug("%s: %d (OK)\n", #val, val)

#define dhry_assert_char_eq(val, expected)    \
 if (val != expected)      \
  pr_err("%s: %c (FAIL, expected %c)\n", #val, val, \
         expected);     \
 else        \
  pr_debug("%s: %c (OK)\n", #val, val)

#define dhry_assert_string_eq(val, expected)    \
 if (strcmp(val, expected))     \
  pr_err("%s: %s (FAIL, expected %s)\n", #val, val, \
         expected);     \
 else        \
  pr_debug("%s: %s (OK)\n", #val, val)

 pr_debug("Execution ends\n");
 pr_debug("Final values of the variables used in the benchmark:\n");
 dhry_assert_int_eq(Int_Glob, 5);
 dhry_assert_int_eq(Bool_Glob, 1);
 dhry_assert_char_eq(Ch_1_Glob, 'A');
 dhry_assert_char_eq(Ch_2_Glob, 'B');
 dhry_assert_int_eq(Arr_1_Glob[8], 7);
 dhry_assert_int_eq(Arr_2_Glob[8][7], Number_Of_Runs + 10);
 pr_debug("Ptr_Comp: %px\n", Ptr_Glob->Ptr_Comp);
 dhry_assert_int_eq(Ptr_Glob->Discr, 0);
 dhry_assert_int_eq(Ptr_Glob->variant.var_1.Enum_Comp, 2);
 dhry_assert_int_eq(Ptr_Glob->variant.var_1.Int_Comp, 17);
 dhry_assert_string_eq(Ptr_Glob->variant.var_1.Str_Comp,
         "DHRYSTONE PROGRAM, SOME STRING");
 if (Next_Ptr_Glob->Ptr_Comp != Ptr_Glob->Ptr_Comp)
  pr_err("Next_Ptr_Glob->Ptr_Comp: %px (expected %px)\n",
         Next_Ptr_Glob->Ptr_Comp, Ptr_Glob->Ptr_Comp);
 else
  pr_debug("Next_Ptr_Glob->Ptr_Comp: %px\n",
    Next_Ptr_Glob->Ptr_Comp);
 dhry_assert_int_eq(Next_Ptr_Glob->Discr, 0);
 dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Enum_Comp, 1);
 dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Int_Comp, 18);
 dhry_assert_string_eq(Next_Ptr_Glob->variant.var_1.Str_Comp,
         "DHRYSTONE PROGRAM, SOME STRING");
 dhry_assert_int_eq(Int_1_Loc, 5);
 dhry_assert_int_eq(Int_2_Loc, 13);
 dhry_assert_int_eq(Int_3_Loc, 7);
 dhry_assert_int_eq(Enum_Loc, 1);
 dhry_assert_string_eq(Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
 dhry_assert_string_eq(Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");

 User_Time = ktime_ms_delta(End_Time, Begin_Time);

 kfree(Ptr_Glob);
 kfree(Next_Ptr_Glob);

 /* Measurements should last at least 2 seconds */
 if (User_Time < 2 * MSEC_PER_SEC)
  return -EAGAIN;

 return div_u64(mul_u32_u32(MSEC_PER_SEC, Number_Of_Runs), User_Time);
}