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/*
* Copyright(c) 2019-2021 Qualcomm Innovation Center, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <inttypes.h>
#include <pthread.h>
/* Using volatile because we are testing atomics */
static inline int atomic_inc32(volatile int *x)
{
int old, dummy;
__asm__ __volatile__(
"1: %0 = memw_locked(%2)\n\t"
" %1 = add(%0, #1)\n\t"
" memw_locked(%2, p0) = %1\n\t"
" if (!p0) jump 1b\n\t"
: "=&r"(old), "=&r"(dummy)
: "r"(x)
: "p0", "memory");
return old;
}
/* Using volatile because we are testing atomics */
static inline long long atomic_inc64(volatile long long *x)
{
long long old, dummy;
__asm__ __volatile__(
"1: %0 = memd_locked(%2)\n\t"
" %1 = #1\n\t"
" %1 = add(%0, %1)\n\t"
" memd_locked(%2, p0) = %1\n\t"
" if (!p0) jump 1b\n\t"
: "=&r"(old), "=&r"(dummy)
: "r"(x)
: "p0", "memory");
return old;
}
/* Using volatile because we are testing atomics */
static inline int atomic_dec32(volatile int *x)
{
int old, dummy;
__asm__ __volatile__(
"1: %0 = memw_locked(%2)\n\t"
" %1 = add(%0, #-1)\n\t"
" memw_locked(%2, p0) = %1\n\t"
" if (!p0) jump 1b\n\t"
: "=&r"(old), "=&r"(dummy)
: "r"(x)
: "p0", "memory");
return old;
}
/* Using volatile because we are testing atomics */
static inline long long atomic_dec64(volatile long long *x)
{
long long old, dummy;
__asm__ __volatile__(
"1: %0 = memd_locked(%2)\n\t"
" %1 = #-1\n\t"
" %1 = add(%0, %1)\n\t"
" memd_locked(%2, p0) = %1\n\t"
" if (!p0) jump 1b\n\t"
: "=&r"(old), "=&r"(dummy)
: "r"(x)
: "p0", "memory");
return old;
}
#define LOOP_CNT 1000
/* Using volatile because we are testing atomics */
volatile int tick32 = 1;
/* Using volatile because we are testing atomics */
volatile long long tick64 = 1;
int err;
void *thread1_func(void *arg)
{
int i;
for (i = 0; i < LOOP_CNT; i++) {
atomic_inc32(&tick32);
atomic_dec64(&tick64);
}
return NULL;
}
void *thread2_func(void *arg)
{
int i;
for (i = 0; i < LOOP_CNT; i++) {
atomic_dec32(&tick32);
atomic_inc64(&tick64);
}
return NULL;
}
void test_pthread(void)
{
pthread_t tid1, tid2;
pthread_create(&tid1, NULL, thread1_func, "hello1");
pthread_create(&tid2, NULL, thread2_func, "hello2");
pthread_join(tid1, NULL);
pthread_join(tid2, NULL);
if (tick32 != 1) {
printf("ERROR: tick32 %d != 1\n", tick32);
err++;
}
if (tick64 != 1) {
printf("ERROR: tick64 %lld != 1\n", tick64);
err++;
}
}
int main(int argc, char **argv)
{
test_pthread();
puts(err ? "FAIL" : "PASS");
return err;
}
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