// See LICENSE for license details. //************************************************************************** // Dhrystone bencmark //-------------------------------------------------------------------------- // // This is the classic Dhrystone synthetic integer benchmark. // struct tms time_info; #define read_csr(reg) ({ unsigned long __tmp; \ asm volatile ("csrr %0, " #reg : "=r"(__tmp)); \ __tmp; }) #pragma GCC optimize ("no-inline") #include "dhrystone.h" void debug_printf(const char* str, ...); #include /* Global Variables: */ Rec_Pointer Ptr_Glob, Next_Ptr_Glob; int Int_Glob; Boolean Bool_Glob; char Ch_1_Glob, Ch_2_Glob; int Arr_1_Glob [50]; int Arr_2_Glob [50] [50]; Enumeration Func_1 (); /* forward declaration necessary since Enumeration may not simply be int */ #ifndef REG Boolean Reg = false; #define REG /* REG becomes defined as empty */ /* i.e. no register variables */ #else Boolean Reg = true; #undef REG #define REG register #endif Boolean Done; long Begin_Time, End_Time, User_Time; long Microseconds, Dhrystones_Per_Second; /* end of variables for time measurement */ int main (int argc, char** argv) /*****/ /* main program, corresponds to procedures */ /* Main and Proc_0 in the Ada version */ { One_Fifty Int_1_Loc; REG One_Fifty Int_2_Loc; One_Fifty Int_3_Loc; REG char Ch_Index; Enumeration Enum_Loc; Str_30 Str_1_Loc; Str_30 Str_2_Loc; REG int Run_Index; REG int Number_Of_Runs; /* Arguments */ Number_Of_Runs = NUMBER_OF_RUNS; /* Initializations */ Next_Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type)); Ptr_Glob = (Rec_Pointer) alloca (sizeof (Rec_Type)); Ptr_Glob->Ptr_Comp = Next_Ptr_Glob; Ptr_Glob->Discr = Ident_1; Ptr_Glob->variant.var_1.Enum_Comp = Ident_3; Ptr_Glob->variant.var_1.Int_Comp = 40; strcpy (Ptr_Glob->variant.var_1.Str_Comp, "DHRYSTONE PROGRAM, SOME STRING"); strcpy (Str_1_Loc, "DHRYSTONE PROGRAM, 1'ST STRING"); Arr_2_Glob [8][7] = 10; /* Was missing in published program. Without this statement, */ /* Arr_2_Glob [8][7] would have an undefined value. */ /* Warning: With 16-Bit processors and Number_Of_Runs > 32000, */ /* overflow may occur for this array element. */ debug_printf("\n"); debug_printf("Dhrystone Benchmark, Version %s\n", Version); if (Reg) { debug_printf("Program compiled with 'register' attribute\n"); } else { debug_printf("Program compiled without 'register' attribute\n"); } debug_printf("Using %s, HZ=%d\n", CLOCK_TYPE, HZ); debug_printf("\n"); Done = false; while (!Done) { debug_printf("Trying %d runs through Dhrystone:\n", Number_Of_Runs); /***************/ /* Start timer */ /***************/ Start_Timer(); for (Run_Index = 1; Run_Index <= Number_Of_Runs; ++Run_Index) { Proc_5(); Proc_4(); /* Ch_1_Glob == 'A', Ch_2_Glob == 'B', Bool_Glob == true */ Int_1_Loc = 2; Int_2_Loc = 3; strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 2'ND STRING"); Enum_Loc = Ident_2; Bool_Glob = ! Func_2 (Str_1_Loc, Str_2_Loc); /* Bool_Glob == 1 */ while (Int_1_Loc < Int_2_Loc) /* loop body executed once */ { Int_3_Loc = 5 * Int_1_Loc - Int_2_Loc; /* Int_3_Loc == 7 */ Proc_7 (Int_1_Loc, Int_2_Loc, &Int_3_Loc); /* Int_3_Loc == 7 */ Int_1_Loc += 1; } /* while */ /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */ Proc_8 (Arr_1_Glob, Arr_2_Glob, Int_1_Loc, Int_3_Loc); /* Int_Glob == 5 */ Proc_1 (Ptr_Glob); for (Ch_Index = 'A'; Ch_Index <= Ch_2_Glob; ++Ch_Index) /* loop body executed twice */ { if (Enum_Loc == Func_1 (Ch_Index, 'C')) /* then, not executed */ { Proc_6 (Ident_1, &Enum_Loc); strcpy (Str_2_Loc, "DHRYSTONE PROGRAM, 3'RD STRING"); Int_2_Loc = Run_Index; Int_Glob = Run_Index; } } /* Int_1_Loc == 3, Int_2_Loc == 3, Int_3_Loc == 7 */ Int_2_Loc = Int_2_Loc * Int_1_Loc; Int_1_Loc = Int_2_Loc / Int_3_Loc; Int_2_Loc = 7 * (Int_2_Loc - Int_3_Loc) - Int_1_Loc; /* Int_1_Loc == 1, Int_2_Loc == 13, Int_3_Loc == 7 */ Proc_2 (&Int_1_Loc); /* Int_1_Loc == 5 */ } /* loop "for Run_Index" */ /**************/ /* Stop timer */ /**************/ Stop_Timer(); User_Time = End_Time - Begin_Time; if (User_Time < Too_Small_Time) { printf("Measured time too small to obtain meaningful results\n"); Number_Of_Runs = Number_Of_Runs * 10; printf("\n"); } else Done = true; } debug_printf("Final values of the variables used in the benchmark:\n"); debug_printf("\n"); debug_printf("Int_Glob: %d\n", Int_Glob); debug_printf(" should be: %d\n", 5); debug_printf("Bool_Glob: %d\n", Bool_Glob); debug_printf(" should be: %d\n", 1); debug_printf("Ch_1_Glob: %c\n", Ch_1_Glob); debug_printf(" should be: %c\n", 'A'); debug_printf("Ch_2_Glob: %c\n", Ch_2_Glob); debug_printf(" should be: %c\n", 'B'); debug_printf("Arr_1_Glob[8]: %d\n", Arr_1_Glob[8]); debug_printf(" should be: %d\n", 7); debug_printf("Arr_2_Glob[8][7]: %d\n", Arr_2_Glob[8][7]); debug_printf(" should be: Number_Of_Runs + 10\n"); debug_printf("Ptr_Glob->\n"); debug_printf(" Ptr_Comp: %d\n", (long) Ptr_Glob->Ptr_Comp); debug_printf(" should be: (implementation-dependent)\n"); debug_printf(" Discr: %d\n", Ptr_Glob->Discr); debug_printf(" should be: %d\n", 0); debug_printf(" Enum_Comp: %d\n", Ptr_Glob->variant.var_1.Enum_Comp); debug_printf(" should be: %d\n", 2); debug_printf(" Int_Comp: %d\n", Ptr_Glob->variant.var_1.Int_Comp); debug_printf(" should be: %d\n", 17); debug_printf(" Str_Comp: %s\n", Ptr_Glob->variant.var_1.Str_Comp); debug_printf(" should be: DHRYSTONE PROGRAM, SOME STRING\n"); debug_printf("Next_Ptr_Glob->\n"); debug_printf(" Ptr_Comp: %d\n", (long) Next_Ptr_Glob->Ptr_Comp); debug_printf(" should be: (implementation-dependent), same as above\n"); debug_printf(" Discr: %d\n", Next_Ptr_Glob->Discr); debug_printf(" should be: %d\n", 0); debug_printf(" Enum_Comp: %d\n", Next_Ptr_Glob->variant.var_1.Enum_Comp); debug_printf(" should be: %d\n", 1); debug_printf(" Int_Comp: %d\n", Next_Ptr_Glob->variant.var_1.Int_Comp); debug_printf(" should be: %d\n", 18); debug_printf(" Str_Comp: %s\n", Next_Ptr_Glob->variant.var_1.Str_Comp); debug_printf(" should be: DHRYSTONE PROGRAM, SOME STRING\n"); debug_printf("Int_1_Loc: %d\n", Int_1_Loc); debug_printf(" should be: %d\n", 5); debug_printf("Int_2_Loc: %d\n", Int_2_Loc); debug_printf(" should be: %d\n", 13); debug_printf("Int_3_Loc: %d\n", Int_3_Loc); debug_printf(" should be: %d\n", 7); debug_printf("Enum_Loc: %d\n", Enum_Loc); debug_printf(" should be: %d\n", 1); debug_printf("Str_1_Loc: %s\n", Str_1_Loc); debug_printf(" should be: DHRYSTONE PROGRAM, 1'ST STRING\n"); debug_printf("Str_2_Loc: %s\n", Str_2_Loc); debug_printf(" should be: DHRYSTONE PROGRAM, 2'ND STRING\n"); debug_printf("\n"); Microseconds = ((User_Time / Number_Of_Runs) * Mic_secs_Per_Second) / HZ; Dhrystones_Per_Second = (HZ * Number_Of_Runs) / User_Time; printf("Microseconds for one run through Dhrystone: %ld\n", Microseconds); printf("Dhrystones per Second: %ld\n", Dhrystones_Per_Second); return 0; } Proc_1 (Ptr_Val_Par) /******************/ REG Rec_Pointer Ptr_Val_Par; /* executed once */ { REG Rec_Pointer Next_Record = Ptr_Val_Par->Ptr_Comp; /* == Ptr_Glob_Next */ /* Local variable, initialized with Ptr_Val_Par->Ptr_Comp, */ /* corresponds to "rename" in Ada, "with" in Pascal */ structassign (*Ptr_Val_Par->Ptr_Comp, *Ptr_Glob); Ptr_Val_Par->variant.var_1.Int_Comp = 5; Next_Record->variant.var_1.Int_Comp = Ptr_Val_Par->variant.var_1.Int_Comp; Next_Record->Ptr_Comp = Ptr_Val_Par->Ptr_Comp; Proc_3 (&Next_Record->Ptr_Comp); /* Ptr_Val_Par->Ptr_Comp->Ptr_Comp == Ptr_Glob->Ptr_Comp */ if (Next_Record->Discr == Ident_1) /* then, executed */ { Next_Record->variant.var_1.Int_Comp = 6; Proc_6 (Ptr_Val_Par->variant.var_1.Enum_Comp, &Next_Record->variant.var_1.Enum_Comp); Next_Record->Ptr_Comp = Ptr_Glob->Ptr_Comp; Proc_7 (Next_Record->variant.var_1.Int_Comp, 10, &Next_Record->variant.var_1.Int_Comp); } else /* not executed */ structassign (*Ptr_Val_Par, *Ptr_Val_Par->Ptr_Comp); } /* Proc_1 */ Proc_2 (Int_Par_Ref) /******************/ /* executed once */ /* *Int_Par_Ref == 1, becomes 4 */ One_Fifty *Int_Par_Ref; { One_Fifty Int_Loc; Enumeration Enum_Loc; Int_Loc = *Int_Par_Ref + 10; do /* executed once */ if (Ch_1_Glob == 'A') /* then, executed */ { Int_Loc -= 1; *Int_Par_Ref = Int_Loc - Int_Glob; Enum_Loc = Ident_1; } /* if */ while (Enum_Loc != Ident_1); /* true */ } /* Proc_2 */ Proc_3 (Ptr_Ref_Par) /******************/ /* executed once */ /* Ptr_Ref_Par becomes Ptr_Glob */ Rec_Pointer *Ptr_Ref_Par; { if (Ptr_Glob != Null) /* then, executed */ *Ptr_Ref_Par = Ptr_Glob->Ptr_Comp; Proc_7 (10, Int_Glob, &Ptr_Glob->variant.var_1.Int_Comp); } /* Proc_3 */ Proc_4 () /* without parameters */ /*******/ /* executed once */ { Boolean Bool_Loc; Bool_Loc = Ch_1_Glob == 'A'; Bool_Glob = Bool_Loc | Bool_Glob; Ch_2_Glob = 'B'; } /* Proc_4 */ Proc_5 () /* without parameters */ /*******/ /* executed once */ { Ch_1_Glob = 'A'; Bool_Glob = false; } /* Proc_5 */