| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 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 | |
| 123 | int main(int argc, char **argv) |
| 124 | { |
| 125 | test_pthread(); |
| 126 | puts(err ? "FAIL" : "PASS"); |
| 127 | return err; |
| 128 | } |