[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/kernel.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(CONFIG_S390) || defined(_ASM_GENERIC_ATOMIC64_H) || defined(CONFIG_ARM)
	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_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>
0dbdd1bf	12	#include <linux/kernel.h>
86a89380 LB	13	#include <asm/atomic.h>
	14
	15	#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
	16	static __init int test_atomic64(void)
	17	{
	18	long long v0 = 0xaaa31337c001d00dLL;
	19	long long v1 = 0xdeadbeefdeafcafeLL;
	20	long long v2 = 0xfaceabadf00df001LL;
	21	long long onestwos = 0x1111111122222222LL;
	22	long long one = 1LL;
	23
	24	atomic64_t v = ATOMIC64_INIT(v0);
	25	long long r = v0;
	26	BUG_ON(v.counter != r);
	27
	28	atomic64_set(&v, v1);
	29	r = v1;
	30	BUG_ON(v.counter != r);
	31	BUG_ON(atomic64_read(&v) != r);
	32
	33	INIT(v0);
	34	atomic64_add(onestwos, &v);
	35	r += onestwos;
	36	BUG_ON(v.counter != r);
	37
	38	INIT(v0);
	39	atomic64_add(-one, &v);
	40	r += -one;
	41	BUG_ON(v.counter != r);
	42
	43	INIT(v0);
	44	r += onestwos;
	45	BUG_ON(atomic64_add_return(onestwos, &v) != r);
	46	BUG_ON(v.counter != r);
	47
	48	INIT(v0);
	49	r += -one;
	50	BUG_ON(atomic64_add_return(-one, &v) != r);
	51	BUG_ON(v.counter != r);
	52
	53	INIT(v0);
	54	atomic64_sub(onestwos, &v);
	55	r -= onestwos;
	56	BUG_ON(v.counter != r);
	57
	58	INIT(v0);
	59	atomic64_sub(-one, &v);
	60	r -= -one;
	61	BUG_ON(v.counter != r);
	62
	63	INIT(v0);
	64	r -= onestwos;
	65	BUG_ON(atomic64_sub_return(onestwos, &v) != r);
	66	BUG_ON(v.counter != r);
	67
	68	INIT(v0);
	69	r -= -one;
	70	BUG_ON(atomic64_sub_return(-one, &v) != r);
	71	BUG_ON(v.counter != r);
	72
	73	INIT(v0);
	74	atomic64_inc(&v);
	75	r += one;
	76	BUG_ON(v.counter != r);
77
78	INIT(v0);
79	r += one;
80	BUG_ON(atomic64_inc_return(&v) != r);
81	BUG_ON(v.counter != r);
82
83	INIT(v0);
84	atomic64_dec(&v);
85	r -= one;
86	BUG_ON(v.counter != r);
87
88	INIT(v0);
89	r -= one;
90	BUG_ON(atomic64_dec_return(&v) != r);
91	BUG_ON(v.counter != r);
92
93	INIT(v0);
94	BUG_ON(atomic64_xchg(&v, v1) != v0);
95	r = v1;
96	BUG_ON(v.counter != r);
97
98	INIT(v0);
99	BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
100	r = v1;
101	BUG_ON(v.counter != r);
102
103	INIT(v0);
104	BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
105	BUG_ON(v.counter != r);
106
107	INIT(v0);
9efbcd59	108	BUG_ON(atomic64_add_unless(&v, one, v0));
86a89380 LB	109	BUG_ON(v.counter != r);
	110
	111	INIT(v0);
9efbcd59	112	BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 LB	113	r += one;
	114	BUG_ON(v.counter != r);
	115
007d0867	116	#if defined(CONFIG_X86) \|\| defined(CONFIG_MIPS) \|\| defined(CONFIG_PPC) \|\| \
c58bbd39	117	defined(CONFIG_S390) \|\| defined(_ASM_GENERIC_ATOMIC64_H) \|\| defined(CONFIG_ARM)
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 LB	130	#else
	131	#warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above
	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);