1 /*
2 * Copyright(c) 2019-2023 Qualcomm Innovation Center, Inc. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 */
17
18 #include <stdlib.h>
19 #include <stdio.h>
20 #include <stdint.h>
21 #include <string.h>
22 #include <unistd.h>
23 #include <inttypes.h>
24 #include <pthread.h>
25
26 int err;
27
28 #include "hex_test.h"
29
atomic_inc32(int32_t * x)30 static inline int32_t atomic_inc32(int32_t *x)
31 {
32 int32_t old, dummy;
33 __asm__ __volatile__(
34 "1: %0 = memw_locked(%2)\n\t"
35 " %1 = add(%0, #1)\n\t"
36 " memw_locked(%2, p0) = %1\n\t"
37 " if (!p0) jump 1b\n\t"
38 : "=&r"(old), "=&r"(dummy)
39 : "r"(x)
40 : "p0", "memory");
41 return old;
42 }
43
atomic_inc64(int64_t * x)44 static inline int64_t atomic_inc64(int64_t *x)
45 {
46 int64_t old, dummy;
47 __asm__ __volatile__(
48 "1: %0 = memd_locked(%2)\n\t"
49 " %1 = #1\n\t"
50 " %1 = add(%0, %1)\n\t"
51 " memd_locked(%2, p0) = %1\n\t"
52 " if (!p0) jump 1b\n\t"
53 : "=&r"(old), "=&r"(dummy)
54 : "r"(x)
55 : "p0", "memory");
56 return old;
57 }
58
atomic_dec32(int32_t * x)59 static inline int32_t atomic_dec32(int32_t *x)
60 {
61 int32_t old, dummy;
62 __asm__ __volatile__(
63 "1: %0 = memw_locked(%2)\n\t"
64 " %1 = add(%0, #-1)\n\t"
65 " memw_locked(%2, p0) = %1\n\t"
66 " if (!p0) jump 1b\n\t"
67 : "=&r"(old), "=&r"(dummy)
68 : "r"(x)
69 : "p0", "memory");
70 return old;
71 }
72
atomic_dec64(int64_t * x)73 static inline int64_t atomic_dec64(int64_t *x)
74 {
75 int64_t old, dummy;
76 __asm__ __volatile__(
77 "1: %0 = memd_locked(%2)\n\t"
78 " %1 = #-1\n\t"
79 " %1 = add(%0, %1)\n\t"
80 " memd_locked(%2, p0) = %1\n\t"
81 " if (!p0) jump 1b\n\t"
82 : "=&r"(old), "=&r"(dummy)
83 : "r"(x)
84 : "p0", "memory");
85 return old;
86 }
87
88 #define LOOP_CNT 1000
89 volatile int32_t tick32 = 1; /* Using volatile because we are testing atomics */
90 volatile int64_t tick64 = 1; /* Using volatile because we are testing atomics */
91
thread1_func(void * arg)92 void *thread1_func(void *arg)
93 {
94 for (int i = 0; i < LOOP_CNT; i++) {
95 atomic_inc32(&tick32);
96 atomic_dec64(&tick64);
97 }
98 return NULL;
99 }
100
thread2_func(void * arg)101 void *thread2_func(void *arg)
102 {
103 for (int i = 0; i < LOOP_CNT; i++) {
104 atomic_dec32(&tick32);
105 atomic_inc64(&tick64);
106 }
107 return NULL;
108 }
109
test_pthread(void)110 void test_pthread(void)
111 {
112 pthread_t tid1, tid2;
113
114 pthread_create(&tid1, NULL, thread1_func, "hello1");
115 pthread_create(&tid2, NULL, thread2_func, "hello2");
116 pthread_join(tid1, NULL);
117 pthread_join(tid2, NULL);
118
119 check32(tick32, 1);
120 check64(tick64, 1);
121 }
122
main(int argc,char ** argv)123 int main(int argc, char **argv)
124 {
125 test_pthread();
126 puts(err ? "FAIL" : "PASS");
127 return err;
128 }
129