[linux-2.6-block.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.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#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
	pr_info("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
	pr_info("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	*/
b3b16d28 FF	11
	12	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
	13
86a89380	14	#include <linux/init.h>
50af5ead	15	#include <linux/bug.h>
0dbdd1bf	16	#include <linux/kernel.h>
60063497	17	#include <linux/atomic.h>
86a89380 LB	18
	19	#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
	20	static __init int test_atomic64(void)
	21	{
	22	long long v0 = 0xaaa31337c001d00dLL;
	23	long long v1 = 0xdeadbeefdeafcafeLL;
	24	long long v2 = 0xfaceabadf00df001LL;
	25	long long onestwos = 0x1111111122222222LL;
	26	long long one = 1LL;
	27
	28	atomic64_t v = ATOMIC64_INIT(v0);
	29	long long r = v0;
	30	BUG_ON(v.counter != r);
	31
	32	atomic64_set(&v, v1);
	33	r = v1;
	34	BUG_ON(v.counter != r);
	35	BUG_ON(atomic64_read(&v) != r);
	36
	37	INIT(v0);
	38	atomic64_add(onestwos, &v);
	39	r += onestwos;
	40	BUG_ON(v.counter != r);
	41
	42	INIT(v0);
	43	atomic64_add(-one, &v);
	44	r += -one;
	45	BUG_ON(v.counter != r);
	46
	47	INIT(v0);
	48	r += onestwos;
	49	BUG_ON(atomic64_add_return(onestwos, &v) != r);
	50	BUG_ON(v.counter != r);
	51
	52	INIT(v0);
	53	r += -one;
	54	BUG_ON(atomic64_add_return(-one, &v) != r);
	55	BUG_ON(v.counter != r);
	56
	57	INIT(v0);
	58	atomic64_sub(onestwos, &v);
	59	r -= onestwos;
	60	BUG_ON(v.counter != r);
	61
	62	INIT(v0);
	63	atomic64_sub(-one, &v);
	64	r -= -one;
	65	BUG_ON(v.counter != r);
	66
	67	INIT(v0);
	68	r -= onestwos;
	69	BUG_ON(atomic64_sub_return(onestwos, &v) != r);
	70	BUG_ON(v.counter != r);
	71
	72	INIT(v0);
	73	r -= -one;
	74	BUG_ON(atomic64_sub_return(-one, &v) != r);
	75	BUG_ON(v.counter != r);
	76
	77	INIT(v0);
	78	atomic64_inc(&v);
	79	r += one;
	80	BUG_ON(v.counter != r);
	81
82	INIT(v0);
83	r += one;
84	BUG_ON(atomic64_inc_return(&v) != r);
85	BUG_ON(v.counter != r);
86
87	INIT(v0);
88	atomic64_dec(&v);
89	r -= one;
90	BUG_ON(v.counter != r);
91
92	INIT(v0);
93	r -= one;
94	BUG_ON(atomic64_dec_return(&v) != r);
95	BUG_ON(v.counter != r);
96
97	INIT(v0);
98	BUG_ON(atomic64_xchg(&v, v1) != v0);
99	r = v1;
100	BUG_ON(v.counter != r);
101
102	INIT(v0);
103	BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
104	r = v1;
105	BUG_ON(v.counter != r);
106
107	INIT(v0);
108	BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
109	BUG_ON(v.counter != r);
110
111	INIT(v0);
9efbcd59	112	BUG_ON(atomic64_add_unless(&v, one, v0));
86a89380 LB	113	BUG_ON(v.counter != r);
	114
	115	INIT(v0);
9efbcd59	116	BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 LB	117	r += one;
	118	BUG_ON(v.counter != r);
	119
7463449b	120	#ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
86a89380 LB	121	INIT(onestwos);
	122	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
	123	r -= one;
	124	BUG_ON(v.counter != r);
	125
	126	INIT(0);
	127	BUG_ON(atomic64_dec_if_positive(&v) != -one);
	128	BUG_ON(v.counter != r);
	129
	130	INIT(-one);
	131	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
	132	BUG_ON(v.counter != r);
8f4f202b	133	#else
7463449b	134	#warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
8f4f202b	135	#endif
86a89380 LB	136
86a89380 LB	137	INIT(onestwos);
25a304f2	138	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	139	r += one;
	140	BUG_ON(v.counter != r);
	141
	142	INIT(0);
25a304f2	143	BUG_ON(atomic64_inc_not_zero(&v));
86a89380 LB	144	BUG_ON(v.counter != r);
	145
	146	INIT(-one);
25a304f2	147	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	148	r += one;
	149	BUG_ON(v.counter != r);
	150
	151	#ifdef CONFIG_X86
b3b16d28	152	pr_info("passed for %s platform %s CX8 and %s SSE\n",
a5c9161f	153	#ifdef CONFIG_X86_64
b3b16d28	154	"x86-64",
a5c9161f	155	#elif defined(CONFIG_X86_CMPXCHG64)
b3b16d28	156	"i586+",
86a89380	157	#else
b3b16d28	158	"i386+",
86a89380	159	#endif
a5c9161f PA	160	boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
a5c9161f PA	161	boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
86a89380	162	#else
b3b16d28	163	pr_info("passed\n");
86a89380 LB	164	#endif
	165
	166	return 0;
	167	}
	168
	169	core_initcall(test_atomic64);