[GitHub/exynos8895/android_kernel_samsung_universal8895.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 TEST(bit, op, c_op, val)				\
do {								\
	atomic##bit##_set(&v, v0);				\
	r = v0;							\
	atomic##bit##_##op(val, &v);				\
	r c_op val;						\
	WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n",	\
		(unsigned long long)atomic##bit##_read(&v),	\
		(unsigned long long)r);				\
} while (0)

static __init void test_atomic(void)
{
	int v0 = 0xaaa31337;
	int v1 = 0xdeadbeef;
	int onestwos = 0x11112222;
	int one = 1;

	atomic_t v;
	int r;

	TEST(, add, +=, onestwos);
	TEST(, add, +=, -one);
	TEST(, sub, -=, onestwos);
	TEST(, sub, -=, -one);
	TEST(, or, |=, v1);
	TEST(, and, &=, v1);
	TEST(, xor, ^=, v1);
	TEST(, andnot, &= ~, v1);
}

#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
static __init void 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);

	TEST(64, add, +=, onestwos);
	TEST(64, add, +=, -one);
	TEST(64, sub, -=, onestwos);
	TEST(64, sub, -=, -one);
	TEST(64, or, |=, v1);
	TEST(64, and, &=, v1);
	TEST(64, xor, ^=, v1);
	TEST(64, andnot, &= ~, v1);

	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);
	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);
}

static __init int test_atomics(void)
{
	test_atomic();
	test_atomic64();

#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_atomics);
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	18
41b9e9fc PZ	19	#define TEST(bit, op, c_op, val) \
	20	do { \
	21	atomic##bit##_set(&v, v0); \
	22	r = v0; \
	23	atomic##bit##_##op(val, &v); \
	24	r c_op val; \
	25	WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \
	26	(unsigned long long)atomic##bit##_read(&v), \
	27	(unsigned long long)r); \
	28	} while (0)
	29
	30	static __init void test_atomic(void)
	31	{
	32	int v0 = 0xaaa31337;
	33	int v1 = 0xdeadbeef;
	34	int onestwos = 0x11112222;
	35	int one = 1;
	36
	37	atomic_t v;
	38	int r;
	39
	40	TEST(, add, +=, onestwos);
	41	TEST(, add, +=, -one);
	42	TEST(, sub, -=, onestwos);
	43	TEST(, sub, -=, -one);
	44	TEST(, or, \|=, v1);
	45	TEST(, and, &=, v1);
	46	TEST(, xor, ^=, v1);
	47	TEST(, andnot, &= ~, v1);
	48	}
	49
86a89380	50	#define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
41b9e9fc	51	static __init void test_atomic64(void)
86a89380 LB	52	{
	53	long long v0 = 0xaaa31337c001d00dLL;
	54	long long v1 = 0xdeadbeefdeafcafeLL;
	55	long long v2 = 0xfaceabadf00df001LL;
	56	long long onestwos = 0x1111111122222222LL;
	57	long long one = 1LL;
	58
	59	atomic64_t v = ATOMIC64_INIT(v0);
	60	long long r = v0;
	61	BUG_ON(v.counter != r);
	62
	63	atomic64_set(&v, v1);
	64	r = v1;
	65	BUG_ON(v.counter != r);
	66	BUG_ON(atomic64_read(&v) != r);
	67
41b9e9fc PZ	68	TEST(64, add, +=, onestwos);
	69	TEST(64, add, +=, -one);
	70	TEST(64, sub, -=, onestwos);
	71	TEST(64, sub, -=, -one);
	72	TEST(64, or, \|=, v1);
	73	TEST(64, and, &=, v1);
	74	TEST(64, xor, ^=, v1);
	75	TEST(64, andnot, &= ~, v1);
86a89380 LB	76
	77	INIT(v0);
	78	r += onestwos;
	79	BUG_ON(atomic64_add_return(onestwos, &v) != r);
	80	BUG_ON(v.counter != r);
	81
	82	INIT(v0);
	83	r += -one;
	84	BUG_ON(atomic64_add_return(-one, &v) != r);
	85	BUG_ON(v.counter != r);
	86
86a89380 LB	87	INIT(v0);
	88	r -= onestwos;
	89	BUG_ON(atomic64_sub_return(onestwos, &v) != r);
	90	BUG_ON(v.counter != r);
	91
	92	INIT(v0);
	93	r -= -one;
	94	BUG_ON(atomic64_sub_return(-one, &v) != r);
	95	BUG_ON(v.counter != r);
	96
	97	INIT(v0);
	98	atomic64_inc(&v);
	99	r += one;
	100	BUG_ON(v.counter != r);
	101
	102	INIT(v0);
	103	r += one;
	104	BUG_ON(atomic64_inc_return(&v) != r);
	105	BUG_ON(v.counter != r);
	106
	107	INIT(v0);
	108	atomic64_dec(&v);
	109	r -= one;
	110	BUG_ON(v.counter != r);
	111
	112	INIT(v0);
	113	r -= one;
	114	BUG_ON(atomic64_dec_return(&v) != r);
	115	BUG_ON(v.counter != r);
	116
	117	INIT(v0);
	118	BUG_ON(atomic64_xchg(&v, v1) != v0);
	119	r = v1;
	120	BUG_ON(v.counter != r);
	121
	122	INIT(v0);
	123	BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
	124	r = v1;
	125	BUG_ON(v.counter != r);
	126
	127	INIT(v0);
	128	BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
	129	BUG_ON(v.counter != r);
	130
	131	INIT(v0);
9efbcd59	132	BUG_ON(atomic64_add_unless(&v, one, v0));
86a89380 LB	133	BUG_ON(v.counter != r);
	134
	135	INIT(v0);
9efbcd59	136	BUG_ON(!atomic64_add_unless(&v, one, v1));
86a89380 LB	137	r += one;
	138	BUG_ON(v.counter != r);
	139
7463449b	140	#ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
86a89380 LB	141	INIT(onestwos);
	142	BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
	143	r -= one;
	144	BUG_ON(v.counter != r);
	145
	146	INIT(0);
	147	BUG_ON(atomic64_dec_if_positive(&v) != -one);
	148	BUG_ON(v.counter != r);
	149
	150	INIT(-one);
	151	BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
	152	BUG_ON(v.counter != r);
8f4f202b	153	#else
7463449b	154	#warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
8f4f202b	155	#endif
86a89380 LB	156
86a89380 LB	157	INIT(onestwos);
25a304f2	158	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	159	r += one;
	160	BUG_ON(v.counter != r);
	161
	162	INIT(0);
25a304f2	163	BUG_ON(atomic64_inc_not_zero(&v));
86a89380 LB	164	BUG_ON(v.counter != r);
	165
	166	INIT(-one);
25a304f2	167	BUG_ON(!atomic64_inc_not_zero(&v));
86a89380 LB	168	r += one;
86a89380 LB	169	BUG_ON(v.counter != r);
41b9e9fc PZ	170	}
	171
	172	static __init int test_atomics(void)
	173	{
	174	test_atomic();
	175	test_atomic64();
86a89380 LB	176
86a89380 LB	177	#ifdef CONFIG_X86
b3b16d28	178	pr_info("passed for %s platform %s CX8 and %s SSE\n",
a5c9161f	179	#ifdef CONFIG_X86_64
b3b16d28	180	"x86-64",
a5c9161f	181	#elif defined(CONFIG_X86_CMPXCHG64)
b3b16d28	182	"i586+",
86a89380	183	#else
b3b16d28	184	"i386+",
86a89380	185	#endif
a5c9161f PA	186	boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
a5c9161f PA	187	boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
86a89380	188	#else
b3b16d28	189	pr_info("passed\n");
86a89380 LB	190	#endif
	191
	192	return 0;
	193	}
	194
41b9e9fc	195	core_initcall(test_atomics);