1 /* { dg-do run } */
2 /* { dg-require-effective-target sync_long_long_runtime } */
3 /* { dg-require-effective-target pthread_h } */
4 /* { dg-require-effective-target pthread } */
5 /* { dg-options "-pthread -std=gnu99" } */
6 /* { dg-additional-options "-march=pentium" { target { { i?86-*-* x86_64-*-* } && ia32 } } } */
7
8 /* test of long long atomic ops performed in parallel in 3 pthreads
9 david.gilbert@linaro.org */
10
11 #include <pthread.h>
12 #include <unistd.h>
13 #ifdef _WIN32
14 #include <windows.h>
15 #endif
16
17 /*#define DEBUGIT 1 */
18
19 #ifdef DEBUGIT
20 #include <stdio.h>
21
22 #define DOABORT(x,...) {\
23 fprintf (stderr, x, __VA_ARGS__); fflush (stderr); abort ();\
24 }
25
26 #else
27
28 #define DOABORT(x,...) abort ();
29
30 #endif
31
32 /* Passed to each thread to describe which bits it is going to work on. */
33 struct threadwork {
34 unsigned long long count; /* incremented each time the worker loops. */
35 unsigned int thread; /* ID */
36 unsigned int addlsb; /* 8 bit */
37 unsigned int logic1lsb; /* 5 bit */
38 unsigned int logic2lsb; /* 8 bit */
39 };
40
41 /* The shared word where all the atomic work is done. */
42 static volatile long long workspace;
43
44 /* A shared word to tell the workers to quit when non-0. */
45 static long long doquit;
46
47 extern void abort (void);
48
49 /* Note this test doesn't test the return values much. */
50 void*
worker(void * data)51 worker (void* data)
52 {
53 struct threadwork *tw = (struct threadwork*)data;
54 long long add1bit = 1ll << tw->addlsb;
55 long long logic1bit = 1ll << tw->logic1lsb;
56 long long logic2bit = 1ll << tw->logic2lsb;
57
58 /* Clear the bits we use. */
59 __sync_and_and_fetch (&workspace, ~(0xffll * add1bit));
60 __sync_fetch_and_and (&workspace, ~(0x1fll * logic1bit));
61 __sync_fetch_and_and (&workspace, ~(0xffll * logic2bit));
62
63 do
64 {
65 long long tmp1, tmp2, tmp3;
66 /* OK, lets try and do some stuff to the workspace - by the end
67 of the main loop our area should be the same as it is now - i.e. 0. */
68
69 /* Push the arithmetic section up to 128 - one of the threads will
70 case this to carry across the 32bit boundary. */
71 for (tmp2 = 0; tmp2 < 64; tmp2++)
72 {
73 /* Add 2 using the two different adds. */
74 tmp1 = __sync_add_and_fetch (&workspace, add1bit);
75 tmp3 = __sync_fetch_and_add (&workspace, add1bit);
76
77 /* The value should be the intermediate add value in both cases. */
78 if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff)))
79 DOABORT ("Mismatch of add intermediates on thread %d "
80 "workspace=0x%llx tmp1=0x%llx "
81 "tmp2=0x%llx tmp3=0x%llx\n",
82 tw->thread, workspace, tmp1, tmp2, tmp3);
83 }
84
85 /* Set the logic bits. */
86 tmp2=__sync_or_and_fetch (&workspace,
87 0x1fll * logic1bit | 0xffll * logic2bit);
88
89 /* Check the logic bits are set and the arithmetic value is correct. */
90 if ((tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit
91 | 0xffll * add1bit))
92 != (0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit))
93 DOABORT ("Midloop check failed on thread %d "
94 "workspace=0x%llx tmp2=0x%llx "
95 "masktmp2=0x%llx expected=0x%llx\n",
96 tw->thread, workspace, tmp2,
97 tmp2 & (0x1fll * logic1bit | 0xffll * logic2bit |
98 0xffll * add1bit),
99 (0x1fll * logic1bit | 0xffll * logic2bit | 0x80ll * add1bit));
100
101 /* Pull the arithmetic set back down to 0 - again this should cause a
102 carry across the 32bit boundary in one thread. */
103
104 for (tmp2 = 0; tmp2 < 64; tmp2++)
105 {
106 /* Subtract 2 using the two different subs. */
107 tmp1=__sync_sub_and_fetch (&workspace, add1bit);
108 tmp3=__sync_fetch_and_sub (&workspace, add1bit);
109
110 /* The value should be the intermediate sub value in both cases. */
111 if ((tmp1 & (add1bit * 0xff)) != (tmp3 & (add1bit * 0xff)))
112 DOABORT ("Mismatch of sub intermediates on thread %d "
113 "workspace=0x%llx tmp1=0x%llx "
114 "tmp2=0x%llx tmp3=0x%llx\n",
115 tw->thread, workspace, tmp1, tmp2, tmp3);
116 }
117
118
119 /* Clear the logic bits. */
120 __sync_fetch_and_xor (&workspace, 0x1fll * logic1bit);
121 tmp3=__sync_and_and_fetch (&workspace, ~(0xffll * logic2bit));
122
123 /* The logic bits and the arithmetic bits should be zero again. */
124 if (tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit))
125 DOABORT ("End of worker loop; bits none 0 on thread %d "
126 "workspace=0x%llx tmp3=0x%llx "
127 "mask=0x%llx maskedtmp3=0x%llx\n",
128 tw->thread, workspace, tmp3, (0x1fll * logic1bit |
129 0xffll * logic2bit | 0xffll * add1bit),
130 tmp3 & (0x1fll * logic1bit | 0xffll * logic2bit | 0xffll * add1bit));
131
132 __sync_add_and_fetch (&tw->count, 1);
133 }
134 while (!__sync_bool_compare_and_swap (&doquit, 1, 1));
135
136 pthread_exit (0);
137 }
138
139 int
main()140 main ()
141 {
142 /* We have 3 threads doing three sets of operations, an 8 bit
143 arithmetic field, a 5 bit logic field and an 8 bit logic
144 field (just to pack them all in).
145
146 6 5 4 4 3 2 1
147 3 6 8 0 2 4 6 8 0
148 |...,...|...,...|...,...|...,...|...,...|...,...|...,...|...,...
149 - T0 -- T1 -- T2 --T2 -- T0 -*- T2-- T1-- T1 -***- T0-
150 logic2 logic2 arith log2 arith log1 log1 arith log1
151
152 */
153 unsigned int t;
154 long long tmp;
155 int err;
156
157 struct threadwork tw[3]={
158 { 0ll, 0, 27, 0, 56 },
159 { 0ll, 1, 8,16, 48 },
160 { 0ll, 2, 40,21, 35 }
161 };
162
163 pthread_t threads[3];
164
165 __sync_lock_release (&doquit);
166
167 /* Get the work space into a known value - All 1's. */
168 __sync_lock_release (&workspace); /* Now all 0. */
169 tmp = __sync_val_compare_and_swap (&workspace, 0, -1ll);
170 if (tmp!=0)
171 DOABORT ("Initial __sync_val_compare_and_swap wasn't 0 workspace=0x%llx "
172 "tmp=0x%llx\n", workspace,tmp);
173
174 for (t = 0; t < 3; t++)
175 {
176 err=pthread_create (&threads[t], NULL , worker, &tw[t]);
177 if (err) DOABORT ("pthread_create failed on thread %d with error %d\n",
178 t, err);
179 };
180
181 #ifdef _WIN32
182 Sleep (5000);
183 #else
184 sleep (5);
185 #endif
186
187 /* Stop please. */
188 __sync_lock_test_and_set (&doquit, 1ll);
189
190 for (t = 0; t < 3; t++)
191 {
192 err=pthread_join (threads[t], NULL);
193 if (err)
194 DOABORT ("pthread_join failed on thread %d with error %d\n", t, err);
195 };
196
197 __sync_synchronize ();
198
199 /* OK, so all the workers have finished -
200 the workers should have zero'd their workspace, the unused areas
201 should still be 1. */
202 if (!__sync_bool_compare_and_swap (&workspace, 0x040000e0ll, 0))
203 DOABORT ("End of run workspace mismatch, got %llx\n", workspace);
204
205 /* All the workers should have done some work. */
206 for (t = 0; t < 3; t++)
207 {
208 if (tw[t].count == 0) DOABORT ("Worker %d gave 0 count\n", t);
209 };
210
211 return 0;
212 }
213
214