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.h (part 1 of 3)
11 *
12 * Date: May 25, 1988
13 *
14 * Author: Reinhold P. Weicker
15 * Siemens AG, AUT E 51
16 * Postfach 3220
17 * 8520 Erlangen
18 * Germany (West)
19 * Phone: [+49]-9131-7-20330
20 * (8-17 Central European Time)
21 * Usenet: ..!mcsun!unido!estevax!weicker
22 *
23 * Original Version (in Ada) published in
24 * "Communications of the ACM" vol. 27., no. 10 (Oct. 1984),
25 * pp. 1013 - 1030, together with the statistics
26 * on which the distribution of statements etc. is based.
27 *
28 * In this C version, the following C library functions are used:
29 * - strcpy, strcmp (inside the measurement loop)
30 * - printf, scanf (outside the measurement loop)
31 * In addition, Berkeley UNIX system calls "times ()" or "time ()"
32 * are used for execution time measurement. For measurements
33 * on other systems, these calls have to be changed.
34 *
35 * Collection of Results:
36 * Reinhold Weicker (address see above) and
37 *
38 * Rick Richardson
39 * PC Research. Inc.
40 * 94 Apple Orchard Drive
41 * Tinton Falls, NJ 07724
42 * Phone: (201) 389-8963 (9-17 EST)
43 * Usenet: ...!uunet!pcrat!rick
44 *
45 * Please send results to Rick Richardson and/or Reinhold Weicker.
46 * Complete information should be given on hardware and software used.
47 * Hardware information includes: Machine type, CPU, type and size
48 * of caches; for microprocessors: clock frequency, memory speed
49 * (number of wait states).
50 * Software information includes: Compiler (and runtime library)
51 * manufacturer and version, compilation switches, OS version.
52 * The Operating System version may give an indication about the
53 * compiler; Dhrystone itself performs no OS calls in the measurement loop.
54 *
55 * The complete output generated by the program should be mailed
56 * such that at least some checks for correctness can be made.
57 *
58 ***************************************************************************
59 *
60 * History: This version C/2.1 has been made for two reasons:
61 *
62 * 1) There is an obvious need for a common C version of
63 * Dhrystone, since C is at present the most popular system
64 * programming language for the class of processors
65 * (microcomputers, minicomputers) where Dhrystone is used most.
66 * There should be, as far as possible, only one C version of
67 * Dhrystone such that results can be compared without
68 * restrictions. In the past, the C versions distributed
69 * by Rick Richardson (Version 1.1) and by Reinhold Weicker
70 * had small (though not significant) differences.
71 *
72 * 2) As far as it is possible without changes to the Dhrystone
73 * statistics, optimizing compilers should be prevented from
74 * removing significant statements.
75 *
76 * This C version has been developed in cooperation with
77 * Rick Richardson (Tinton Falls, NJ), it incorporates many
78 * ideas from the "Version 1.1" distributed previously by
79 * him over the UNIX network Usenet.
80 * I also thank Chaim Benedelac (National Semiconductor),
81 * David Ditzel (SUN), Earl Killian and John Mashey (MIPS),
82 * Alan Smith and Rafael Saavedra-Barrera (UC at Berkeley)
83 * for their help with comments on earlier versions of the
84 * benchmark.
85 *
86 * Changes: In the initialization part, this version follows mostly
87 * Rick Richardson's version distributed via Usenet, not the
88 * version distributed earlier via floppy disk by Reinhold Weicker.
89 * As a concession to older compilers, names have been made
90 * unique within the first 8 characters.
91 * Inside the measurement loop, this version follows the
92 * version previously distributed by Reinhold Weicker.
93 *
94 * At several places in the benchmark, code has been added,
95 * but within the measurement loop only in branches that
96 * are not executed. The intention is that optimizing compilers
97 * should be prevented from moving code out of the measurement
98 * loop, or from removing code altogether. Since the statements
99 * that are executed within the measurement loop have NOT been
100 * changed, the numbers defining the "Dhrystone distribution"
101 * (distribution of statements, operand types and locality)
102 * still hold. Except for sophisticated optimizing compilers,
103 * execution times for this version should be the same as
104 * for previous versions.
105 *
106 * Since it has proven difficult to subtract the time for the
107 * measurement loop overhead in a correct way, the loop check
108 * has been made a part of the benchmark. This does have
109 * an impact - though a very minor one - on the distribution
110 * statistics which have been updated for this version.
111 *
112 * All changes within the measurement loop are described
113 * and discussed in the companion paper "Rationale for
114 * Dhrystone version 2".
115 *
116 * Because of the self-imposed limitation that the order and
117 * distribution of the executed statements should not be
118 * changed, there are still cases where optimizing compilers
119 * may not generate code for some statements. To a certain
120 * degree, this is unavoidable for small synthetic benchmarks.
121 * Users of the benchmark are advised to check code listings
122 * whether code is generated for all statements of Dhrystone.
123 *
124 * Version 2.1 is identical to version 2.0 distributed via
125 * the UNIX network Usenet in March 1988 except that it corrects
126 * some minor deficiencies that were found by users of version 2.0.
127 * The only change within the measurement loop is that a
128 * non-executed "else" part was added to the "if" statement in
129 * Func_3, and a non-executed "else" part removed from Proc_3.
130 *
131 ***************************************************************************
132 *
133 * Compilation model and measurement (IMPORTANT):
134 *
135 * This C version of Dhrystone consists of three files:
136 * - dhry.h (this file, containing global definitions and comments)
137 * - dhry_1.c (containing the code corresponding to Ada package Pack_1)
138 * - dhry_2.c (containing the code corresponding to Ada package Pack_2)
139 *
140 * The following "ground rules" apply for measurements:
141 * - Separate compilation
142 * - No procedure merging
143 * - Otherwise, compiler optimizations are allowed but should be indicated
144 * - Default results are those without register declarations
145 * See the companion paper "Rationale for Dhrystone Version 2" for a more
146 * detailed discussion of these ground rules.
147 *
148 * For 16-Bit processors (e.g. 80186, 80286), times for all compilation
149 * models ("small", "medium", "large" etc.) should be given if possible,
150 * together with a definition of these models for the compiler system used.
151 *
152 **************************************************************************
153 *
154 * Dhrystone (C version) statistics:
155 *
156 * [Comment from the first distribution, updated for version 2.
157 * Note that because of language differences, the numbers are slightly
158 * different from the Ada version.]
159 *
160 * The following program contains statements of a high level programming
161 * language (here: C) in a distribution considered representative:
162 *
163 * assignments 52 (51.0 %)
164 * control statements 33 (32.4 %)
165 * procedure, function calls 17 (16.7 %)
166 *
167 * 103 statements are dynamically executed. The program is balanced with
168 * respect to the three aspects:
169 *
170 * - statement type
171 * - operand type
172 * - operand locality
173 * operand global, local, parameter, or constant.
174 *
175 * The combination of these three aspects is balanced only approximately.
176 *
177 * 1. Statement Type:
178 * ----------------- number
179 *
180 * V1 = V2 9
181 * (incl. V1 = F(..)
182 * V = Constant 12
183 * Assignment, 7
184 * with array element
185 * Assignment, 6
186 * with record component
187 * --
188 * 34 34
189 *
190 * X = Y +|-|"&&"|"|" Z 5
191 * X = Y +|-|"==" Constant 6
192 * X = X +|- 1 3
193 * X = Y *|/ Z 2
194 * X = Expression, 1
195 * two operators
196 * X = Expression, 1
197 * three operators
198 * --
199 * 18 18
200 *
201 * if .... 14
202 * with "else" 7
203 * without "else" 7
204 * executed 3
205 * not executed 4
206 * for ... 7 | counted every time
207 * while ... 4 | the loop condition
208 * do ... while 1 | is evaluated
209 * switch ... 1
210 * break 1
211 * declaration with 1
212 * initialization
213 * --
214 * 34 34
215 *
216 * P (...) procedure call 11
217 * user procedure 10
218 * library procedure 1
219 * X = F (...)
220 * function call 6
221 * user function 5
222 * library function 1
223 * --
224 * 17 17
225 * ---
226 * 103
227 *
228 * The average number of parameters in procedure or function calls
229 * is 1.82 (not counting the function values as implicit parameters).
230 *
231 *
232 * 2. Operators
233 * ------------
234 * number approximate
235 * percentage
236 *
237 * Arithmetic 32 50.8
238 *
239 * + 21 33.3
240 * - 7 11.1
241 * * 3 4.8
242 * / (int div) 1 1.6
243 *
244 * Comparison 27 42.8
245 *
246 * == 9 14.3
247 * /= 4 6.3
248 * > 1 1.6
249 * < 3 4.8
250 * >= 1 1.6
251 * <= 9 14.3
252 *
253 * Logic 4 6.3
254 *
255 * && (AND-THEN) 1 1.6
256 * | (OR) 1 1.6
257 * ! (NOT) 2 3.2
258 *
259 * -- -----
260 * 63 100.1
261 *
262 *
263 * 3. Operand Type (counted once per operand reference):
264 * ---------------
265 * number approximate
266 * percentage
267 *
268 * Integer 175 72.3 %
269 * Character 45 18.6 %
270 * Pointer 12 5.0 %
271 * String30 6 2.5 %
272 * Array 2 0.8 %
273 * Record 2 0.8 %
274 * --- -------
275 * 242 100.0 %
276 *
277 * When there is an access path leading to the final operand (e.g. a record
278 * component), only the final data type on the access path is counted.
279 *
280 *
281 * 4. Operand Locality:
282 * -------------------
283 * number approximate
284 * percentage
285 *
286 * local variable 114 47.1 %
287 * global variable 22 9.1 %
288 * parameter 45 18.6 %
289 * value 23 9.5 %
290 * reference 22 9.1 %
291 * function result 6 2.5 %
292 * constant 55 22.7 %
293 * --- -------
294 * 242 100.0 %
295 *
296 *
297 * The program does not compute anything meaningful, but it is syntactically
298 * and semantically correct. All variables have a value assigned to them
299 * before they are used as a source operand.
300 *
301 * There has been no explicit effort to account for the effects of a
302 * cache, or to balance the use of long or short displacements for code or
303 * data.
304 *
305 ***************************************************************************
306 */
307
308 typedef enum {
309 Ident_1,
310 Ident_2,
311 Ident_3,
312 Ident_4,
313 Ident_5
314 } Enumeration; /* for boolean and enumeration types in Ada, Pascal */
315
316 /* General definitions: */
317
318 typedef int One_Thirty;
319 typedef int One_Fifty;
320 typedef char Capital_Letter;
321 typedef int Boolean;
322 typedef char Str_30[31];
323 typedef int Arr_1_Dim[50];
324 typedef int Arr_2_Dim[50][50];
325
326 typedef struct record {
327 struct record *Ptr_Comp;
328 Enumeration Discr;
329 union {
330 struct {
331 Enumeration Enum_Comp;
332 int Int_Comp;
333 char Str_Comp[31];
334 } var_1;
335 struct {
336 Enumeration E_Comp_2;
337 char Str_2_Comp[31];
338 } var_2;
339 struct {
340 char Ch_1_Comp;
341 char Ch_2_Comp;
342 } var_3;
343 } variant;
344 } Rec_Type, *Rec_Pointer;
345
346
347 extern int Int_Glob;
348 extern char Ch_1_Glob;
349
350 void Proc_6(Enumeration Enum_Val_Par, Enumeration *Enum_Ref_Par);
351 void Proc_7(One_Fifty Int_1_Par_Val, One_Fifty Int_2_Par_Val,
352 One_Fifty *Int_Par_Ref);
353 void Proc_8(Arr_1_Dim Arr_1_Par_Ref, Arr_2_Dim Arr_2_Par_Ref,
354 int Int_1_Par_Val, int Int_2_Par_Val);
355 Enumeration Func_1(Capital_Letter Ch_1_Par_Val, Capital_Letter Ch_2_Par_Val);
356 Boolean Func_2(Str_30 Str_1_Par_Ref, Str_30 Str_2_Par_Ref);
357
358 int dhry(int n);
359
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