[linux.git] / lib / atomic64_test.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 <linux/bug.h>
#include <linux/kernel.h>
#include <linux/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);

#ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
	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 select the above Kconfig symbol
#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_64
	       "x86-64",
#elif defined(CONFIG_X86_CMPXCHG64)
	       "i586+",
#else
	       "i386+",
#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);
Commit	Line	Data
86a89380 LB	1	/*
	2	* Testsuite for atomic64_t functions
	3	*
	4	* Copyright © 2010 Luca Barbieri
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*/
	11	#include <linux/init.h>
50af5ead	12	#include <linux/bug.h>
0dbdd1bf	13	#include <linux/kernel.h>
60063497	14	#include <linux/atomic.h>
86a89380 LB	15
	16	#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
	17	static __init int test_atomic64(void)
	18	{
	19	long long v0 = 0xaaa31337c001d00dLL;
	20	long long v1 = 0xdeadbeefdeafcafeLL;
	21	long long v2 = 0xfaceabadf00df001LL;
	22	long long onestwos = 0x1111111122222222LL;
	23	long long one = 1LL;
	24
	25	atomic64_t v = ATOMIC64_INIT(v0);
	26	long long r = v0;
	27	BUG_ON(v.counter != r);
	28
	29	atomic64_set(&v, v1);
	30	r = v1;
	31	BUG_ON(v.counter != r);
	32	BUG_ON(atomic64_read(&v) != r);
	33
	34	INIT(v0);
	35	atomic64_add(onestwos, &v);
	36	r += onestwos;
	37	BUG_ON(v.counter != r);
	38
	39	INIT(v0);
	40	atomic64_add(-one, &v);
	41	r += -one;
	42	BUG_ON(v.counter != r);
	43
	44	INIT(v0);
	45	r += onestwos;
	46	BUG_ON(atomic64_add_return(onestwos, &v) != r);
	47	BUG_ON(v.counter != r);
	48
	49	INIT(v0);
	50	r += -one;
	51	BUG_ON(atomic64_add_return(-one, &v) != r);
	52	BUG_ON(v.counter != r);
	53
	54	INIT(v0);
	55	atomic64_sub(onestwos, &v);
	56	r -= onestwos;
	57	BUG_ON(v.counter != r);
	58
	59	INIT(v0);
	60	atomic64_sub(-one, &v);
	61	r -= -one;
	62	BUG_ON(v.counter != r);
	63
	64	INIT(v0);
	65	r -= onestwos;
	66	BUG_ON(atomic64_sub_return(onestwos, &v) != r);
	67	BUG_ON(v.counter != r);
	68
	69	INIT(v0);
	70	r -= -one;
	71	BUG_ON(atomic64_sub_return(-one, &v) != r);
	72	BUG_ON(v.counter != r);
	73
	74	INIT(v0);
	75	atomic64_inc(&v);
	76	r += one;
	77	BUG_ON(v.counter != r);
	78
79	INIT(v0);
80	r += one;
81	BUG_ON(atomic64_inc_return(&v) != r);
82	BUG_ON(v.counter != r);
83
84	INIT(v0);
85	atomic64_dec(&v);
86	r -= one;
87	BUG_ON(v.counter != r);
88
89	INIT(v0);
90	r -= one;
91	BUG_ON(atomic64_dec_return(&v) != r);
92	BUG_ON(v.counter != r);
93
94	INIT(v0);
95	BUG_ON(atomic64_xchg(&v, v1) != v0);
96	r = v1;
97	BUG_ON(v.counter != r);
98
99	INIT(v0);
100	BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
101	r = v1;
102	BUG_ON(v.counter != r);
103
104	INIT(v0);
105	BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
106	BUG_ON(v.counter != r);
107
108	INIT(v0);
9efbcd59	109	BUG_ON(atomic64_add_unless(&v, one, v0));
86a89380 LB	110	BUG_ON(v.counter != r);
	111
	112	INIT(v0);
9efbcd59	113	BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 LB	114	r += one;
	115	BUG_ON(v.counter != r);
	116
7463449b	117	#ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
86a89380 LB	118	INIT(onestwos);
	119	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
	120	r -= one;
	121	BUG_ON(v.counter != r);
	122
	123	INIT(0);
	124	BUG_ON(atomic64_dec_if_positive(&v) != -one);
	125	BUG_ON(v.counter != r);
	126
	127	INIT(-one);
	128	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
	129	BUG_ON(v.counter != r);
8f4f202b	130	#else
7463449b	131	#warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
8f4f202b	132	#endif
86a89380 LB	133
86a89380 LB	134	INIT(onestwos);
25a304f2	135	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	136	r += one;
	137	BUG_ON(v.counter != r);
	138
	139	INIT(0);
25a304f2	140	BUG_ON(atomic64_inc_not_zero(&v));
86a89380 LB	141	BUG_ON(v.counter != r);
	142
	143	INIT(-one);
25a304f2	144	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	145	r += one;
	146	BUG_ON(v.counter != r);
	147
	148	#ifdef CONFIG_X86
a5c9161f PA	149	printk(KERN_INFO "atomic64 test passed for %s platform %s CX8 and %s SSE\n",
	150	#ifdef CONFIG_X86_64
	151	"x86-64",
	152	#elif defined(CONFIG_X86_CMPXCHG64)
	153	"i586+",
86a89380	154	#else
a5c9161f	155	"i386+",
86a89380	156	#endif
a5c9161f PA	157	boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
a5c9161f PA	158	boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
86a89380 LB	159	#else
	160	printk(KERN_INFO "atomic64 test passed\n");
	161	#endif
	162
	163	return 0;
	164	}
	165
	166	core_initcall(test_atomic64);