9efbcd5902
atomic64_add_unless must return 1 if it perfomed the add and 0 otherwise. The test assumed the opposite convention. Reported-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Luca Barbieri <luca@luca-barbieri.com> LKML-Reference: <1267469749-11878-2-git-send-email-luca@luca-barbieri.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
163 lines
3.3 KiB
C
163 lines
3.3 KiB
C
/*
|
|
* Testsuite for atomic64_t functions
|
|
*
|
|
* Copyright © 2010 Luca Barbieri
|
|
*
|
|
* 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.
|
|
*/
|
|
#include <linux/init.h>
|
|
#include <asm/atomic.h>
|
|
|
|
#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
|
|
static __init int test_atomic64(void)
|
|
{
|
|
long long v0 = 0xaaa31337c001d00dLL;
|
|
long long v1 = 0xdeadbeefdeafcafeLL;
|
|
long long v2 = 0xfaceabadf00df001LL;
|
|
long long onestwos = 0x1111111122222222LL;
|
|
long long one = 1LL;
|
|
|
|
atomic64_t v = ATOMIC64_INIT(v0);
|
|
long long r = v0;
|
|
BUG_ON(v.counter != r);
|
|
|
|
atomic64_set(&v, v1);
|
|
r = v1;
|
|
BUG_ON(v.counter != r);
|
|
BUG_ON(atomic64_read(&v) != r);
|
|
|
|
INIT(v0);
|
|
atomic64_add(onestwos, &v);
|
|
r += onestwos;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
atomic64_add(-one, &v);
|
|
r += -one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r += onestwos;
|
|
BUG_ON(atomic64_add_return(onestwos, &v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r += -one;
|
|
BUG_ON(atomic64_add_return(-one, &v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
atomic64_sub(onestwos, &v);
|
|
r -= onestwos;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
atomic64_sub(-one, &v);
|
|
r -= -one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r -= onestwos;
|
|
BUG_ON(atomic64_sub_return(onestwos, &v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r -= -one;
|
|
BUG_ON(atomic64_sub_return(-one, &v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
atomic64_inc(&v);
|
|
r += one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r += one;
|
|
BUG_ON(atomic64_inc_return(&v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
atomic64_dec(&v);
|
|
r -= one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
r -= one;
|
|
BUG_ON(atomic64_dec_return(&v) != r);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
BUG_ON(atomic64_xchg(&v, v1) != v0);
|
|
r = v1;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
|
|
r = v1;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
BUG_ON(atomic64_add_unless(&v, one, v0));
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(v0);
|
|
BUG_ON(!atomic64_add_unless(&v, one, v1));
|
|
r += one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
#if defined(CONFIG_X86) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(_ASM_GENERIC_ATOMIC64_H)
|
|
INIT(onestwos);
|
|
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
|
|
r -= one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(0);
|
|
BUG_ON(atomic64_dec_if_positive(&v) != -one);
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(-one);
|
|
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
|
|
BUG_ON(v.counter != r);
|
|
#else
|
|
#warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above
|
|
#endif
|
|
|
|
INIT(onestwos);
|
|
BUG_ON(atomic64_inc_not_zero(&v));
|
|
r += one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(0);
|
|
BUG_ON(!atomic64_inc_not_zero(&v));
|
|
BUG_ON(v.counter != r);
|
|
|
|
INIT(-one);
|
|
BUG_ON(atomic64_inc_not_zero(&v));
|
|
r += one;
|
|
BUG_ON(v.counter != r);
|
|
|
|
#ifdef CONFIG_X86
|
|
printk(KERN_INFO "atomic64 test passed for %s+ platform %s CX8 and %s SSE\n",
|
|
#ifdef CONFIG_X86_CMPXCHG64
|
|
"586",
|
|
#else
|
|
"386",
|
|
#endif
|
|
boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
|
|
boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
|
|
#else
|
|
printk(KERN_INFO "atomic64 test passed\n");
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
core_initcall(test_atomic64);
|