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 void finishTest( int toHostValue )
  48 {
  49 #if HOST_DEBUG
  50   if ( toHostValue == 1 )
  51     printf( "*** PASSED ***\n" );
  52   else
  53     printf( "*** FAILED *** (tohost = %d)\n", toHostValue );
  54   exit(0);
  55 #else
  56   asm( "mtpcr %0, tohost" : : "r" (toHostValue) );
  57   while ( 1 ) { }
  58 #endif
  59 }
  60
  61 void setStats( int enable )
  62 {
  63 #if ( !HOST_DEBUG && SET_STATS )
  64   asm( "mtpcr %0, cr10" : : "r" (enable) );
  65 #endif
  66 }
  67
  68 #include <alloca.h>
  69
  70 /* Global Variables: */
  71
  72 Rec_Pointer     Ptr_Glob,
  73                 Next_Ptr_Glob;
  74 int             Int_Glob;
  75 Boolean         Bool_Glob;
  76 char            Ch_1_Glob,
  77                 Ch_2_Glob;
  78 int             Arr_1_Glob [50];
  79 int             Arr_2_Glob [50] [50];
  80
  81 #ifndef REG
  82         Boolean Reg = false;
  83 #define REG
  84         /* REG becomes defined as empty */
  85         /* i.e. no register variables   */
  86 #else
  87         Boolean Reg = true;
  88 #undef REG
  89 #define REG register
  90 #endif
  91
  92 Boolean         Done;
  93
  94 long            Begin_Time,
  95                 End_Time,
  96                 User_Time;
  97 float           Microseconds,
  98                 Dhrystones_Per_Second;
  99
 100 /* end of variables for time measurement */
 101
 102
 103 int main (int argc, char** argv)
 104 /*****/
 105   /* main program, corresponds to procedures        */
 106   /* Main and Proc_0 in the Ada version             */
 107 {
 108         One_Fifty       Int_1_Loc;
 109   REG   One_Fifty       Int_2_Loc;
 110         One_Fifty       Int_3_Loc;
 111   REG   char            Ch_Index;
 112         Enumeration     Enum_Loc;
 113         Str_30          Str_1_Loc;
 114         Str_30          Str_2_Loc;
 115   REG   int             Run_Index;
 116   REG   int             Number_Of_Runs;
 117
 118   /* Arguments */
 119 #if HOST_DEBUG
 120   if (argc > 2)
 121   {
 122      do_fprintf (stdout, "Usage: %s [number of loops]\n", argv[0]);
 123      exit (1);
 124   }
 125   if (argc == 2)
 126   {
 127      Number_Of_Runs = atoi (argv[1]);
 128   } else
 129 #endif
 130   {
 131      Number_Of_Runs = NUMBER_OF_RUNS;
 132   }
 133   if (Number_Of_Runs <= 0)
 134   {
 135      Number_Of_Runs = NUMBER_OF_RUNS;
 136   }
 137
 138   /* Initializations */
 139
 140   Next_Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type));
 141   Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type));
 142
 143   Ptr_Glob->Ptr_Comp                    = Next_Ptr_Glob;
 144   Ptr_Glob->Discr                       = Ident_1;
 145   Ptr_Glob->variant.var_1.Enum_Comp     = Ident_3;
 146   Ptr_Glob->variant.var_1.Int_Comp      = 40;
 147   strcpy (Ptr_Glob->variant.var_1.Str_Comp,
 148           "DHRYSTONE PROGRAM, SOME STRING");
 149   strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
 150
 151   Arr_2_Glob [8][7] = 10;
 152         /* Was missing in published program. Without this statement,    */
 153         /* Arr_2_Glob [8][7] would have an undefined value.             */
 154         /* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
 155         /* overflow may occur for this array element.                   */
 156
 157 #if HOST_DEBUG
 158   do_fprintf (stdout, "\n");
 159   do_fprintf (stdout, "Dhrystone Benchmark, Version %s\n", Version);
 160   if (Reg)
 161   {
 162     do_fprintf (stdout, "Program compiled with 'register' attribute\n");
 163   }
 164   else
 165   {
 166     do_fprintf (stdout, "Program compiled without 'register' attribute\n");
 167   }
 168   do_fprintf (stdout, "Using %s, HZ=%d\n", CLOCK_TYPE, HZ);
 169   do_fprintf (stdout, "\n");
 170 #endif
 171
 172   Done = false;
 173   while (!Done) {
 174 #if HOST_DEBUG
 175     do_fprintf (stdout, "Trying %d runs through Dhrystone:\n", Number_Of_Runs);
 176 #endif
 177
 178     /***************/
 179     /* Start timer */
 180     /***************/
 181
 182     Start_Timer();
 183     setStats(1);
 184
 185     for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index)
 186     {
 187
 188       Proc_5();
 189       Proc_4();
 190         /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
 191       Int_1_Loc = 2;
 192       Int_2_Loc = 3;
 193       strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
 194       Enum_Loc = Ident_2;
 195       Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc);
 196         /* Bool_Glob == 1 */
 197       while (Int_1_Loc < Int_2_Loc)  /* loop body executed once */
 198       {
 199         Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
 200           /* Int_3_Loc == 7 */
 201         Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc);
 202           /* Int_3_Loc == 7 */
 203         Int_1_Loc += 1;
 204       } /* while */
 205         /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 206       Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
 207         /* Int_Glob == 5 */
 208       Proc_1 (Ptr_Glob);
 209       for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index)
 210                                /* loop body executed twice */
 211       {
 212         if (Enum_Loc == Func_1 (Ch_Index, 'C'))
 213             /* then, not executed */
 214           {
 215           Proc_6 (Ident_1, &Enum_Loc);
 216           strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
 217           Int_2_Loc = Run_Index;
 218           Int_Glob = Run_Index;
 219           }
 220       }
 221         /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 222       Int_2_Loc = Int_2_Loc * Int_1_Loc;
 223       Int_1_Loc = Int_2_Loc / Int_3_Loc;
 224       Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
 225         /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
 226       Proc_2 (&Int_1_Loc);
 227         /* Int_1_Loc == 5 */
 228
 229     } /* loop "for Run_Index" */
 230
 231     /**************/
 232     /* Stop timer */
 233     /**************/
 234
 235     setStats(0);
 236     Stop_Timer();
 237
 238     User_Time = End_Time - Begin_Time;
 239
 240     if (User_Time < Too_Small_Time)
 241     {
 242       do_fprintf (stdout, "Measured time too small to obtain meaningful results\n");
 243       Number_Of_Runs = Number_Of_Runs * 10;
 244       do_fprintf (stdout, "\n");
 245     } else Done = true;
 246   }
 247
 248   do_fprintf (stderr, "Final values of the variables used in the benchmark:\n");
 249   do_fprintf (stderr, "\n");
 250   do_fprintf (stderr, "Int_Glob:            %d\n", Int_Glob);
 251   do_fprintf (stderr, "        should be:   %d\n", 5);
 252   do_fprintf (stderr, "Bool_Glob:           %d\n", Bool_Glob);
 253   do_fprintf (stderr, "        should be:   %d\n", 1);
 254   do_fprintf (stderr, "Ch_1_Glob:           %c\n", Ch_1_Glob);
 255   do_fprintf (stderr, "        should be:   %c\n", 'A');
 256   do_fprintf (stderr, "Ch_2_Glob:           %c\n", Ch_2_Glob);
 257   do_fprintf (stderr, "        should be:   %c\n", 'B');
 258   do_fprintf (stderr, "Arr_1_Glob[8]:       %d\n", Arr_1_Glob[8]);
 259   do_fprintf (stderr, "        should be:   %d\n", 7);
 260   do_fprintf (stderr, "Arr_2_Glob[8][7]:    %d\n", Arr_2_Glob[8][7]);
 261   do_fprintf (stderr, "        should be:   Number_Of_Runs + 10\n");
 262   do_fprintf (stderr, "Ptr_Glob->\n");
 263   do_fprintf (stderr, "  Ptr_Comp:          %d\n", (int) Ptr_Glob->Ptr_Comp);
 264   do_fprintf (stderr, "        should be:   (implementation-dependent)\n");
 265   do_fprintf (stderr, "  Discr:             %d\n", Ptr_Glob->Discr);
 266   do_fprintf (stderr, "        should be:   %d\n", 0);
 267   do_fprintf (stderr, "  Enum_Comp:         %d\n", Ptr_Glob->variant.var_1.Enum_Comp);
 268   do_fprintf (stderr, "        should be:   %d\n", 2);
 269   do_fprintf (stderr, "  Int_Comp:          %d\n", Ptr_Glob->variant.var_1.Int_Comp);
 270   do_fprintf (stderr, "        should be:   %d\n", 17);
 271   do_fprintf (stderr, "  Str_Comp:          %s\n", Ptr_Glob->variant.var_1.Str_Comp);
 272   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
 273   do_fprintf (stderr, "Next_Ptr_Glob->\n");
 274   do_fprintf (stderr, "  Ptr_Comp:          %d\n", (int) Next_Ptr_Glob->Ptr_Comp);
 275   do_fprintf (stderr, "        should be:   (implementation-dependent), same as above\n");
 276   do_fprintf (stderr, "  Discr:             %d\n", Next_Ptr_Glob->Discr);
 277   do_fprintf (stderr, "        should be:   %d\n", 0);
 278   do_fprintf (stderr, "  Enum_Comp:         %d\n", Next_Ptr_Glob->variant.var_1.Enum_Comp);
 279   do_fprintf (stderr, "        should be:   %d\n", 1);
 280   do_fprintf (stderr, "  Int_Comp:          %d\n", Next_Ptr_Glob->variant.var_1.Int_Comp);
 281   do_fprintf (stderr, "        should be:   %d\n", 18);
 282   do_fprintf (stderr, "  Str_Comp:          %s\n",
 283                                 Next_Ptr_Glob->variant.var_1.Str_Comp);
 284   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, SOME STRING\n");
 285   do_fprintf (stderr, "Int_1_Loc:           %d\n", Int_1_Loc);
 286   do_fprintf (stderr, "        should be:   %d\n", 5);
 287   do_fprintf (stderr, "Int_2_Loc:           %d\n", Int_2_Loc);
 288   do_fprintf (stderr, "        should be:   %d\n", 13);
 289   do_fprintf (stderr, "Int_3_Loc:           %d\n", Int_3_Loc);
 290   do_fprintf (stderr, "        should be:   %d\n", 7);
 291   do_fprintf (stderr, "Enum_Loc:            %d\n", Enum_Loc);
 292   do_fprintf (stderr, "        should be:   %d\n", 1);
 293   do_fprintf (stderr, "Str_1_Loc:           %s\n", Str_1_Loc);
 294   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, 1'ST STRING\n");
 295   do_fprintf (stderr, "Str_2_Loc:           %s\n", Str_2_Loc);
 296   do_fprintf (stderr, "        should be:   DHRYSTONE PROGRAM, 2'ND STRING\n");
 297   do_fprintf (stderr, "\n");
 298
 299
 300 #if HOST_DEBUG
 301     Microseconds = (float) User_Time * Mic_secs_Per_Second
 302                         / ((float) HZ * ((float) Number_Of_Runs));
 303     Dhrystones_Per_Second = ((float) HZ * (float) Number_Of_Runs)
 304                         / (float) User_Time;
 305
 306     do_fprintf (stdout, "Microseconds for one run through Dhrystone: ");
 307     do_fprintf (stdout, "%10.1f \n", Microseconds);
 308     do_fprintf (stdout, "Dhrystones per Second:                      ");
 309     do_fprintf (stdout, "%10.0f \n", Dhrystones_Per_Second);
 310     do_fprintf (stdout, "\n");
 311 #endif
 312
 313   finishTest(1);
 314 }
 315
 316
 317 void Proc_1(Rec_Pointer Ptr_Val_Par)
 318 /******************/
 319     /* executed once */
 320 {
 321   REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;
 322                                         /* == Ptr_Glob_Next */
 323   /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
 324   /* corresponds to "rename" in Ada, "with" in Pascal           */
 325
 326   structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob);
 327   Ptr_Val_Par->variant.var_1.Int_Comp = 5;
 328   Next_Record->variant.var_1.Int_Comp
 329         = Ptr_Val_Par->variant.var_1.Int_Comp;
 330   Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
 331   Proc_3 (&Next_Record->Ptr_Comp);
 332     /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp
 333                         == Ptr_Glob->Ptr_Comp */
 334   if (Next_Record->Discr == Ident_1)
 335     /* then, executed */
 336   {
 337     Next_Record->variant.var_1.Int_Comp = 6;
 338     Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp,
 339            &Next_Record->variant.var_1.Enum_Comp);
 340     Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
 341     Proc_7 (Next_Record->variant.var_1.Int_Comp, 10,
 342            &Next_Record->variant.var_1.Int_Comp);
 343   }
 344   else /* not executed */
 345     structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp);
 346 } /* Proc_1 */
 347
 348
 349 void Proc_2(int* Int_Par_Ref)
 350 /******************/
 351     /* executed once */
 352     /* *Int_Par_Ref == 1, becomes 4 */
 353 {
 354   One_Fifty  Int_Loc;
 355   Enumeration   Enum_Loc;
 356
 357   Int_Loc = *Int_Par_Ref + 10;
 358   do /* executed once */
 359     if (Ch_1_Glob == 'A')
 360       /* then, executed */
 361     {
 362       Int_Loc -= 1;
 363       *Int_Par_Ref = Int_Loc - Int_Glob;
 364       Enum_Loc = Ident_1;
 365     } /* if */
 366   while (Enum_Loc != Ident_1); /* true */
 367 } /* Proc_2 */
 368
 369
 370 void Proc_3(Rec_Pointer* Ptr_Ref_Par)
 371 /******************/
 372     /* executed once */
 373     /* Ptr_Ref_Par becomes Ptr_Glob */
 374 {
 375   if (Ptr_Glob != Null)
 376     /* then, executed */
 377     *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
 378   Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
 379 } /* Proc_3 */
 380
 381
 382 void Proc_4()
 383 /*******/
 384     /* executed once */
 385 {
 386   Boolean Bool_Loc;
 387
 388   Bool_Loc = Ch_1_Glob == 'A';
 389   Bool_Glob = Bool_Loc | Bool_Glob;
 390   Ch_2_Glob = 'B';
 391 } /* Proc_4 */
 392
 393
 394 void Proc_5()
 395 /*******/
 396     /* executed once */
 397 {
 398   Ch_1_Glob = 'A';
 399   Bool_Glob = false;
 400 } /* Proc_5 */