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_ms_delta(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 } 291