benchmarks/dhrystone/dhrystone_main.c

   1 //**************************************************************************
   2 // Dhrystone bencmark
   3 //--------------------------------------------------------------------------
   4 //
   5 // This is the classic Dhrystone synthetic integer benchmark.
   6 // You should not change anything except the HOST_DEBUG and
   7 // PREALLOCATE macros for your timing run.
   8
   9 #include "dhrystone.h"
  10
  11 //--------------------------------------------------------------------------
  12 // Macros
  13
  14 // Set HOST_DEBUG to 1 if you are going to compile this for a host
  15 // machine (ie Athena/Linux) for debug purposes and set HOST_DEBUG
  16 // to 0 if you are compiling with the smips-gcc toolchain.
  17
  18 #ifndef HOST_DEBUG
  19 #define HOST_DEBUG 0
  20 #endif
  21
  22 // Set PREALLOCATE to 1 if you want to preallocate the benchmark
  23 // function before starting stats. If you have instruction/data
  24 // caches and you don't want to count the overhead of misses, then
  25 // you will need to use preallocation.
  26
  27 #ifndef PREALLOCATE
  28 #define PREALLOCATE 0
  29 #endif
  30
  31 // Set SET_STATS to 1 if you want to carve out the piece that actually
  32 // does the computation.
  33
  34 #ifndef SET_STATS
  35 #define SET_STATS 0
  36 #endif
  37
  38 #if HOST_DEBUG
  39 # define do_fprintf fprintf
  40 #else
  41 int __attribute__((noinline)) do_fprintf(FILE* f, const char* str, ...)
  42 {
  43   return 0;
  44 }
  45 #endif
  46
  47 #include "util.h"
  48
  49 #include <alloca.h>
  50
  51 /* Global Variables: */
  52
  53 Rec_Pointer     Ptr_Glob,
  54                 Next_Ptr_Glob;
  55 int             Int_Glob;
  56 Boolean         Bool_Glob;
  57 char            Ch_1_Glob,
  58                 Ch_2_Glob;
  59 int             Arr_1_Glob [50];
  60 int             Arr_2_Glob [50] [50];
  61
  62 #ifndef REG
  63         Boolean Reg = false;
  64 #define REG
  65         /* REG becomes defined as empty */
  66         /* i.e. no register variables   */
  67 #else
  68         Boolean Reg = true;
  69 #undef REG
  70 #define REG register
  71 #endif
  72
  73 Boolean         Done;
  74
  75 long            Begin_Time,
  76                 End_Time,
  77                 User_Time;
  78 float           Microseconds,
  79                 Dhrystones_Per_Second;
  80
  81 /* end of variables for time measurement */
  82
  83
  84 int main (int argc, char** argv)
  85 /*****/
  86   /* main program, corresponds to procedures        */
  87   /* Main and Proc_0 in the Ada version             */
  88 {
  89         One_Fifty       Int_1_Loc;
  90   REG   One_Fifty       Int_2_Loc;
  91         One_Fifty       Int_3_Loc;
  92   REG   char            Ch_Index;
  93         Enumeration     Enum_Loc;
  94         Str_30          Str_1_Loc;
  95         Str_30          Str_2_Loc;
  96   REG   int             Run_Index;
  97   REG   int             Number_Of_Runs;
  98
  99   /* Arguments */
 100 #if HOST_DEBUG
 101   if (argc > 2)
 102   {
 103      do_fprintf (stdout, "Usage: %s [number of loops]\n", argv[0]);
 104      exit (1);
 105   }
 106   if (argc == 2)
 107   {
 108      Number_Of_Runs = atoi (argv[1]);
 109   } else
 110 #endif
 111   {
 112      Number_Of_Runs = NUMBER_OF_RUNS;
 113   }
 114   if (Number_Of_Runs <= 0)
 115   {
 116      Number_Of_Runs = NUMBER_OF_RUNS;
 117   }
 118
 119   /* Initializations */
 120
 121   Next_Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type));
 122   Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type));
 123
 124   Ptr_Glob->Ptr_Comp                    = Next_Ptr_Glob;
 125   Ptr_Glob->Discr                       = Ident_1;
 126   Ptr_Glob->variant.var_1.Enum_Comp     = Ident_3;
 127   Ptr_Glob->variant.var_1.Int_Comp      = 40;
 128   strcpy (Ptr_Glob->variant.var_1.Str_Comp,
 129           "DHRYSTONE PROGRAM, SOME STRING");
 130   strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
 131
 132   Arr_2_Glob [8][7] = 10;
 133         /* Was missing in published program. Without this statement,    */
 134         /* Arr_2_Glob [8][7] would have an undefined value.             */
 135         /* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
 136         /* overflow may occur for this array element.                   */
 137
 138 #if HOST_DEBUG
 139   do_fprintf (stdout, "\n");
 140   do_fprintf (stdout, "Dhrystone Benchmark, Version %s\n", Version);
 141   if (Reg)
 142   {
 143     do_fprintf (stdout, "Program compiled with 'register' attribute\n");
 144   }
 145   else
 146   {
 147     do_fprintf (stdout, "Program compiled without 'register' attribute\n");
 148   }
 149   do_fprintf (stdout, "Using %s, HZ=%d\n", CLOCK_TYPE, HZ);
 150   do_fprintf (stdout, "\n");
 151 #endif
 152
 153   Done = false;
 154   while (!Done) {
 155 #if HOST_DEBUG
 156     do_fprintf (stdout, "Trying %d runs through Dhrystone:\n", Number_Of_Runs);
 157 #endif
 158
 159     /***************/
 160     /* Start timer */
 161     /***************/
 162
 163     Start_Timer();
 164     setStats(1);
 165
 166     for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index)
 167     {
 168
 169       Proc_5();
 170       Proc_4();
 171         /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
 172       Int_1_Loc = 2;
 173       Int_2_Loc = 3;
 174       strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
 175       Enum_Loc = Ident_2;
 176       Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc);
 177         /* Bool_Glob == 1 */
 178       while (Int_1_Loc < Int_2_Loc)  /* loop body executed once */
 179       {
 180         Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
 181           /* Int_3_Loc == 7 */
 182         Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc);
 183           /* Int_3_Loc == 7 */
 184         Int_1_Loc += 1;
 185       } /* while */
 186         /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 187       Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
 188         /* Int_Glob == 5 */
 189       Proc_1 (Ptr_Glob);
 190       for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index)
 191                                /* loop body executed twice */
 192       {
 193         if (Enum_Loc == Func_1 (Ch_Index, 'C'))
 194             /* then, not executed */
 195           {
 196           Proc_6 (Ident_1, &Enum_Loc);
 197           strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
 198           Int_2_Loc = Run_Index;
 199           Int_Glob = Run_Index;
 200           }
 201       }
 202         /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 203       Int_2_Loc = Int_2_Loc * Int_1_Loc;
 204       Int_1_Loc = Int_2_Loc / Int_3_Loc;
 205       Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
 206         /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
 207       Proc_2 (&Int_1_Loc);
 208         /* Int_1_Loc == 5 */
 209
 210     } /* loop "for Run_Index" */
 211
 212     /**************/
 213     /* Stop timer */
 214     /**************/
 215
 216     setStats(0);
 217     Stop_Timer();
 218
 219     User_Time = End_Time - Begin_Time;
 220
 221     if (User_Time < Too_Small_Time)
 222     {
 223       do_fprintf (stdout, "Measured time too small to obtain meaningful results\n");
 224       Number_Of_Runs = Number_Of_Runs * 10;
 225       do_fprintf (stdout, "\n");
 226     } else Done = true;
 227   }
 228
 229   do_fprintf (stderr, "Final values of the variables used in the benchmark:\n");
 230   do_fprintf (stderr, "\n");
 231   do_fprintf (stderr, "Int_Glob:            %d\n", Int_Glob);
 232   do_fprintf (stderr, "        should be:   %d\n", 5);
 233   do_fprintf (stderr, "Bool_Glob:           %d\n", Bool_Glob);
 234   do_fprintf (stderr, "        should be:   %d\n", 1);
 235   do_fprintf (stderr, "Ch_1_Glob:           %c\n", Ch_1_Glob);
 236   do_fprintf (stderr, "        should be:   %c\n", 'A');
 237   do_fprintf (stderr, "Ch_2_Glob:           %c\n", Ch_2_Glob);
 238   do_fprintf (stderr, "        should be:   %c\n", 'B');
 239   do_fprintf (stderr, "Arr_1_Glob[8]:       %d\n", Arr_1_Glob[8]);
 240   do_fprintf (stderr, "        should be:   %d\n", 7);
 241   do_fprintf (stderr, "Arr_2_Glob[8][7]:    %d\n", Arr_2_Glob[8][7]);
 242   do_fprintf (stderr, "        should be:   Number_Of_Runs + 10\n");
 243   do_fprintf (stderr, "Ptr_Glob->\n");
 244   do_fprintf (stderr, "  Ptr_Comp:          %d\n", (int) Ptr_Glob->Ptr_Comp);
 245   do_fprintf (stderr, "        should be:   (implementation-dependent)\n");
 246   do_fprintf (stderr, "  Discr:             %d\n", Ptr_Glob->Discr);
 247   do_fprintf (stderr, "        should be:   %d\n", 0);
 248   do_fprintf (stderr, "  Enum_Comp:         %d\n", Ptr_Glob->variant.var_1.Enum_Comp);
 249   do_fprintf (stderr, "        should be:   %d\n", 2);
 250   do_fprintf (stderr, "  Int_Comp:          %d\n", Ptr_Glob->variant.var_1.Int_Comp);
 251   do_fprintf (stderr, "        should be:   %d\n", 17);
 252   do_fprintf (stderr, "  Str_Comp:          %s\n", Ptr_Glob->variant.var_1.Str_Comp);
 253   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
 254   do_fprintf (stderr, "Next_Ptr_Glob->\n");
 255   do_fprintf (stderr, "  Ptr_Comp:          %d\n", (int) Next_Ptr_Glob->Ptr_Comp);
 256   do_fprintf (stderr, "        should be:   (implementation-dependent), same as above\n");
 257   do_fprintf (stderr, "  Discr:             %d\n", Next_Ptr_Glob->Discr);
 258   do_fprintf (stderr, "        should be:   %d\n", 0);
 259   do_fprintf (stderr, "  Enum_Comp:         %d\n", Next_Ptr_Glob->variant.var_1.Enum_Comp);
 260   do_fprintf (stderr, "        should be:   %d\n", 1);
 261   do_fprintf (stderr, "  Int_Comp:          %d\n", Next_Ptr_Glob->variant.var_1.Int_Comp);
 262   do_fprintf (stderr, "        should be:   %d\n", 18);
 263   do_fprintf (stderr, "  Str_Comp:          %s\n",
 264                                 Next_Ptr_Glob->variant.var_1.Str_Comp);
 265   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
 266   do_fprintf (stderr, "Int_1_Loc:           %d\n", Int_1_Loc);
 267   do_fprintf (stderr, "        should be:   %d\n", 5);
 268   do_fprintf (stderr, "Int_2_Loc:           %d\n", Int_2_Loc);
 269   do_fprintf (stderr, "        should be:   %d\n", 13);
 270   do_fprintf (stderr, "Int_3_Loc:           %d\n", Int_3_Loc);
 271   do_fprintf (stderr, "        should be:   %d\n", 7);
 272   do_fprintf (stderr, "Enum_Loc:            %d\n", Enum_Loc);
 273   do_fprintf (stderr, "        should be:   %d\n", 1);
 274   do_fprintf (stderr, "Str_1_Loc:           %s\n", Str_1_Loc);
 275   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, 1'ST STRING\n");
 276   do_fprintf (stderr, "Str_2_Loc:           %s\n", Str_2_Loc);
 277   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, 2'ND STRING\n");
 278   do_fprintf (stderr, "\n");
 279
 280
 281 #if HOST_DEBUG
 282     Microseconds = (float) User_Time * Mic_secs_Per_Second
 283                         / ((float) HZ * ((float) Number_Of_Runs));
 284     Dhrystones_Per_Second = ((float) HZ * (float) Number_Of_Runs)
 285                         / (float) User_Time;
 286
 287     do_fprintf (stdout, "Microseconds for one run through Dhrystone: ");
 288     do_fprintf (stdout, "%10.1f \n", Microseconds);
 289     do_fprintf (stdout, "Dhrystones per Second:                      ");
 290     do_fprintf (stdout, "%10.0f \n", Dhrystones_Per_Second);
 291     do_fprintf (stdout, "\n");
 292 #endif
 293
 294   return 0;
 295 }
 296
 297
 298 void Proc_1(Rec_Pointer Ptr_Val_Par)
 299 /******************/
 300     /* executed once */
 301 {
 302   REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;
 303                                         /* == Ptr_Glob_Next */
 304   /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
 305   /* corresponds to "rename" in Ada, "with" in Pascal           */
 306
 307   structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob);
 308   Ptr_Val_Par->variant.var_1.Int_Comp = 5;
 309   Next_Record->variant.var_1.Int_Comp
 310         = Ptr_Val_Par->variant.var_1.Int_Comp;
 311   Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
 312   Proc_3 (&Next_Record->Ptr_Comp);
 313     /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp
 314                         == Ptr_Glob->Ptr_Comp */
 315   if (Next_Record->Discr == Ident_1)
 316     /* then, executed */
 317   {
 318     Next_Record->variant.var_1.Int_Comp = 6;
 319     Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp,
 320            &Next_Record->variant.var_1.Enum_Comp);
 321     Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
 322     Proc_7 (Next_Record->variant.var_1.Int_Comp, 10,
 323            &Next_Record->variant.var_1.Int_Comp);
 324   }
 325   else /* not executed */
 326     structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
 327 } /* Proc_1 */
 328
 329
 330 void Proc_2(int* Int_Par_Ref)
 331 /******************/
 332     /* executed once */
 333     /* *Int_Par_Ref == 1, becomes 4 */
 334 {
 335   One_Fifty  Int_Loc;
 336   Enumeration   Enum_Loc;
 337
 338   Int_Loc = *Int_Par_Ref + 10;
 339   do /* executed once */
 340     if (Ch_1_Glob == 'A')
 341       /* then, executed */
 342     {
 343       Int_Loc -= 1;
 344       *Int_Par_Ref = Int_Loc - Int_Glob;
 345       Enum_Loc = Ident_1;
 346     } /* if */
 347   while (Enum_Loc != Ident_1); /* true */
 348 } /* Proc_2 */
 349
 350
 351 void Proc_3(Rec_Pointer* Ptr_Ref_Par)
 352 /******************/
 353     /* executed once */
 354     /* Ptr_Ref_Par becomes Ptr_Glob */
 355 {
 356   if (Ptr_Glob != Null)
 357     /* then, executed */
 358     *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
 359   Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
 360 } /* Proc_3 */
 361
 362
 363 void Proc_4()
 364 /*******/
 365     /* executed once */
 366 {
 367   Boolean Bool_Loc;
 368
 369   Bool_Loc = Ch_1_Glob == 'A';
 370   Bool_Glob = Bool_Loc | Bool_Glob;
 371   Ch_2_Glob = 'B';
 372 } /* Proc_4 */
 373
 374
 375 void Proc_5()
 376 /*******/
 377     /* executed once */
 378 {
 379   Ch_1_Glob = 'A';
 380   Bool_Glob = false;
 381 } /* Proc_5 */