benchmarks/dhrystone/dhrystone_main.c

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