lib/dhry_1.c

   1 // SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 /*
   3  ****************************************************************************
   4  *
   5  *                   "DHRYSTONE" Benchmark Program
   6  *                   -----------------------------
   7  *
   8  *  Version:    C, Version 2.1
   9  *
  10  *  File:       dhry_1.c (part 2 of 3)
  11  *
  12  *  Date:       May 25, 1988
  13  *
  14  *  Author:     Reinhold P. Weicker
  15  *
  16  ****************************************************************************
  17  */
  18
  19 #include "dhry.h"
  20
  21 #include <linux/ktime.h>
  22 #include <linux/slab.h>
  23 #include <linux/string.h>
  24
  25 /* Global Variables: */
  26
  27 int Int_Glob;
  28 char Ch_1_Glob;
  29
  30 static Rec_Pointer Ptr_Glob, Next_Ptr_Glob;
  31 static Boolean Bool_Glob;
  32 static char Ch_2_Glob;
  33 static int Arr_1_Glob[50];
  34 static int Arr_2_Glob[50][50];
  35
  36 static void Proc_3(Rec_Pointer *Ptr_Ref_Par)
  37 /******************/
  38 /* executed once */
  39 /* Ptr_Ref_Par becomes Ptr_Glob */
  40 {
  41         if (Ptr_Glob) {
  42                 /* then, executed */
  43                 *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp;
  44         }
  45         Proc_7(10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp);
  46 } /* Proc_3 */
  47
  48
  49 static void Proc_1(Rec_Pointer Ptr_Val_Par)
  50 /******************/
  51 /* executed once */
  52 {
  53         Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp;
  54                                                 /* == Ptr_Glob_Next */
  55         /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp,    */
  56         /* corresponds to "rename" in Ada, "with" in Pascal           */
  57
  58         *Ptr_Val_Par->Ptr_Comp = *Ptr_Glob;
  59         Ptr_Val_Par->variant.var_1.Int_Comp = 5;
  60         Next_Record->variant.var_1.Int_Comp =
  61                 Ptr_Val_Par->variant.var_1.Int_Comp;
  62         Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp;
  63         Proc_3(&Next_Record->Ptr_Comp);
  64         /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp == Ptr_Glob->Ptr_Comp */
  65         if (Next_Record->Discr == Ident_1) {
  66                 /* then, executed */
  67                 Next_Record->variant.var_1.Int_Comp = 6;
  68                 Proc_6(Ptr_Val_Par->variant.var_1.Enum_Comp,
  69                        &Next_Record->variant.var_1.Enum_Comp);
  70                 Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp;
  71                 Proc_7(Next_Record->variant.var_1.Int_Comp, 10,
  72                        &Next_Record->variant.var_1.Int_Comp);
  73         } else {
  74                 /* not executed */
  75                 *Ptr_Val_Par = *Ptr_Val_Par->Ptr_Comp;
  76         }
  77 } /* Proc_1 */
  78
  79
  80 static void Proc_2(One_Fifty *Int_Par_Ref)
  81 /******************/
  82 /* executed once */
  83 /* *Int_Par_Ref == 1, becomes 4 */
  84 {
  85         One_Fifty  Int_Loc;
  86         Enumeration   Enum_Loc;
  87
  88         Int_Loc = *Int_Par_Ref + 10;
  89         do {
  90                 /* executed once */
  91                 if (Ch_1_Glob == 'A') {
  92                         /* then, executed */
  93                         Int_Loc -= 1;
  94                         *Int_Par_Ref = Int_Loc - Int_Glob;
  95                         Enum_Loc = Ident_1;
  96                 } /* if */
  97         } while (Enum_Loc != Ident_1); /* true */
  98 } /* Proc_2 */
  99
 100
 101 static void Proc_4(void)
 102 /*******/
 103 /* executed once */
 104 {
 105         Boolean Bool_Loc;
 106
 107         Bool_Loc = Ch_1_Glob == 'A';
 108         Bool_Glob = Bool_Loc | Bool_Glob;
 109         Ch_2_Glob = 'B';
 110 } /* Proc_4 */
 111
 112
 113 static void Proc_5(void)
 114 /*******/
 115 /* executed once */
 116 {
 117         Ch_1_Glob = 'A';
 118         Bool_Glob = false;
 119 } /* Proc_5 */
 120
 121
 122 int dhry(int n)
 123 /*****/
 124
 125   /* main program, corresponds to procedures        */
 126   /* Main and Proc_0 in the Ada version             */
 127 {
 128         One_Fifty Int_1_Loc;
 129         One_Fifty Int_2_Loc;
 130         One_Fifty Int_3_Loc;
 131         char Ch_Index;
 132         Enumeration Enum_Loc;
 133         Str_30 Str_1_Loc;
 134         Str_30 Str_2_Loc;
 135         int Run_Index;
 136         int Number_Of_Runs;
 137         ktime_t Begin_Time, End_Time;
 138         u32 User_Time;
 139
 140         /* Initializations */
 141
 142         Next_Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_ATOMIC);
 143         if (!Next_Ptr_Glob)
 144                 return -ENOMEM;
 145
 146         Ptr_Glob = (Rec_Pointer)kzalloc(sizeof(Rec_Type), GFP_ATOMIC);
 147         if (!Ptr_Glob) {
 148                 kfree(Next_Ptr_Glob);
 149                 return -ENOMEM;
 150         }
 151
 152         Ptr_Glob->Ptr_Comp = Next_Ptr_Glob;
 153         Ptr_Glob->Discr = Ident_1;
 154         Ptr_Glob->variant.var_1.Enum_Comp = Ident_3;
 155         Ptr_Glob->variant.var_1.Int_Comp = 40;
 156         strcpy(Ptr_Glob->variant.var_1.Str_Comp,
 157                "DHRYSTONE PROGRAM, SOME STRING");
 158         strcpy(Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
 159
 160         Arr_2_Glob[8][7] = 10;
 161         /* Was missing in published program. Without this statement,    */
 162         /* Arr_2_Glob[8][7] would have an undefined value.             */
 163         /* Warning: With 16-Bit processors and Number_Of_Runs > 32000,  */
 164         /* overflow may occur for this array element.                   */
 165
 166         pr_debug("Dhrystone Benchmark, Version 2.1 (Language: C)\n");
 167
 168         Number_Of_Runs = n;
 169
 170         pr_debug("Execution starts, %d runs through Dhrystone\n",
 171                  Number_Of_Runs);
 172
 173         /***************/
 174         /* Start timer */
 175         /***************/
 176
 177         Begin_Time = ktime_get();
 178
 179         for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index) {
 180                 Proc_5();
 181                 Proc_4();
 182                 /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */
 183                 Int_1_Loc = 2;
 184                 Int_2_Loc = 3;
 185                 strcpy(Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
 186                 Enum_Loc = Ident_2;
 187                 Bool_Glob = !Func_2(Str_1_Loc, Str_2_Loc);
 188                 /* Bool_Glob == 1 */
 189                 while (Int_1_Loc < Int_2_Loc) {
 190                         /* loop body executed once */
 191                         Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc;
 192                         /* Int_3_Loc == 7 */
 193                         Proc_7(Int_1_Loc, Int_2_Loc, &Int_3_Loc);
 194                         /* Int_3_Loc == 7 */
 195                         Int_1_Loc += 1;
 196                 } /* while */
 197                 /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 198                 Proc_8(Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc);
 199                 /* Int_Glob == 5 */
 200                 Proc_1(Ptr_Glob);
 201                 for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index) {
 202                         /* loop body executed twice */
 203                         if (Enum_Loc == Func_1(Ch_Index, 'C')) {
 204                                 /* then, not executed */
 205                                 Proc_6(Ident_1, &Enum_Loc);
 206                                 strcpy(Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING");
 207                                 Int_2_Loc = Run_Index;
 208                                 Int_Glob = Run_Index;
 209                         }
 210                 }
 211                 /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */
 212                 Int_2_Loc = Int_2_Loc * Int_1_Loc;
 213                 Int_1_Loc = Int_2_Loc / Int_3_Loc;
 214                 Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc;
 215                 /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */
 216                 Proc_2(&Int_1_Loc);
 217                 /* Int_1_Loc == 5 */
 218
 219         } /* loop "for Run_Index" */
 220
 221         /**************/
 222         /* Stop timer */
 223         /**************/
 224
 225         End_Time = ktime_get();
 226
 227 #define dhry_assert_int_eq(val, expected)                               \
 228         if (val != expected)                                            \
 229                 pr_err("%s: %d (FAIL, expected %d)\n", #val, val,       \
 230                        expected);                                       \
 231         else                                                            \
 232                 pr_debug("%s: %d (OK)\n", #val, val)
 233
 234 #define dhry_assert_char_eq(val, expected)                              \
 235         if (val != expected)                                            \
 236                 pr_err("%s: %c (FAIL, expected %c)\n", #val, val,       \
 237                        expected);                                       \
 238         else                                                            \
 239                 pr_debug("%s: %c (OK)\n", #val, val)
 240
 241 #define dhry_assert_string_eq(val, expected)                            \
 242         if (strcmp(val, expected))                                      \
 243                 pr_err("%s: %s (FAIL, expected %s)\n", #val, val,       \
 244                        expected);                                       \
 245         else                                                            \
 246                 pr_debug("%s: %s (OK)\n", #val, val)
 247
 248         pr_debug("Execution ends\n");
 249         pr_debug("Final values of the variables used in the benchmark:\n");
 250         dhry_assert_int_eq(Int_Glob, 5);
 251         dhry_assert_int_eq(Bool_Glob, 1);
 252         dhry_assert_char_eq(Ch_1_Glob, 'A');
 253         dhry_assert_char_eq(Ch_2_Glob, 'B');
 254         dhry_assert_int_eq(Arr_1_Glob[8], 7);
 255         dhry_assert_int_eq(Arr_2_Glob[8][7], Number_Of_Runs + 10);
 256         pr_debug("Ptr_Comp: %px\n", Ptr_Glob->Ptr_Comp);
 257         dhry_assert_int_eq(Ptr_Glob->Discr, 0);
 258         dhry_assert_int_eq(Ptr_Glob->variant.var_1.Enum_Comp, 2);
 259         dhry_assert_int_eq(Ptr_Glob->variant.var_1.Int_Comp, 17);
 260         dhry_assert_string_eq(Ptr_Glob->variant.var_1.Str_Comp,
 261                               "DHRYSTONE PROGRAM, SOME STRING");
 262         if (Next_Ptr_Glob->Ptr_Comp != Ptr_Glob->Ptr_Comp)
 263                 pr_err("Next_Ptr_Glob->Ptr_Comp: %px (expected %px)\n",
 264                        Next_Ptr_Glob->Ptr_Comp, Ptr_Glob->Ptr_Comp);
 265         else
 266                 pr_debug("Next_Ptr_Glob->Ptr_Comp: %px\n",
 267                          Next_Ptr_Glob->Ptr_Comp);
 268         dhry_assert_int_eq(Next_Ptr_Glob->Discr, 0);
 269         dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Enum_Comp, 1);
 270         dhry_assert_int_eq(Next_Ptr_Glob->variant.var_1.Int_Comp, 18);
 271         dhry_assert_string_eq(Next_Ptr_Glob->variant.var_1.Str_Comp,
 272                               "DHRYSTONE PROGRAM, SOME STRING");
 273         dhry_assert_int_eq(Int_1_Loc, 5);
 274         dhry_assert_int_eq(Int_2_Loc, 13);
 275         dhry_assert_int_eq(Int_3_Loc, 7);
 276         dhry_assert_int_eq(Enum_Loc, 1);
 277         dhry_assert_string_eq(Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING");
 278         dhry_assert_string_eq(Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING");
 279
 280         User_Time = ktime_to_ms(ktime_sub(End_Time, Begin_Time));
 281
 282         kfree(Ptr_Glob);
 283         kfree(Next_Ptr_Glob);
 284
 285         /* Measurements should last at least 2 seconds */
 286         if (User_Time < 2 * MSEC_PER_SEC)
 287                 return -EAGAIN;
 288
 289         return div_u64(mul_u32_u32(MSEC_PER_SEC, Number_Of_Runs), User_Time);
 290 }