2 * Testsuite for atomic64_t functions
4 * Copyright © 2010 Luca Barbieri
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.
12 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14 #include <linux/init.h>
15 #include <linux/bug.h>
16 #include <linux/kernel.h>
17 #include <linux/atomic.h>
19 #define TEST(bit, op, c_op, val) \
21 atomic##bit##_set(&v, v0); \
23 atomic##bit##_##op(val, &v); \
25 WARN(atomic##bit##_read(&v) != r, "%Lx != %Lx\n", \
26 (unsigned long long)atomic##bit##_read(&v), \
27 (unsigned long long)r); \
30 static __init void test_atomic(void)
34 int onestwos = 0x11112222;
40 TEST(, add, +=, onestwos);
41 TEST(, add, +=, -one);
42 TEST(, sub, -=, onestwos);
43 TEST(, sub, -=, -one);
47 TEST(, andnot, &= ~, v1);
50 #define INIT(c) do { atomic64_set(&v, c); r = c; } while (0)
51 static __init void test_atomic64(void)
53 long long v0 = 0xaaa31337c001d00dLL;
54 long long v1 = 0xdeadbeefdeafcafeLL;
55 long long v2 = 0xfaceabadf00df001LL;
56 long long onestwos = 0x1111111122222222LL;
59 atomic64_t v = ATOMIC64_INIT(v0);
61 BUG_ON(v.counter != r);
65 BUG_ON(v.counter != r);
66 BUG_ON(atomic64_read(&v) != r);
68 TEST(64, add, +=, onestwos);
69 TEST(64, add, +=, -one);
70 TEST(64, sub, -=, onestwos);
71 TEST(64, sub, -=, -one);
73 TEST(64, and, &=, v1);
74 TEST(64, xor, ^=, v1);
75 TEST(64, andnot, &= ~, v1);
79 BUG_ON(atomic64_add_return(onestwos, &v) != r);
80 BUG_ON(v.counter != r);
84 BUG_ON(atomic64_add_return(-one, &v) != r);
85 BUG_ON(v.counter != r);
89 BUG_ON(atomic64_sub_return(onestwos, &v) != r);
90 BUG_ON(v.counter != r);
94 BUG_ON(atomic64_sub_return(-one, &v) != r);
95 BUG_ON(v.counter != r);
100 BUG_ON(v.counter != r);
104 BUG_ON(atomic64_inc_return(&v) != r);
105 BUG_ON(v.counter != r);
110 BUG_ON(v.counter != r);
114 BUG_ON(atomic64_dec_return(&v) != r);
115 BUG_ON(v.counter != r);
118 BUG_ON(atomic64_xchg(&v, v1) != v0);
120 BUG_ON(v.counter != r);
123 BUG_ON(atomic64_cmpxchg(&v, v0, v1) != v0);
125 BUG_ON(v.counter != r);
128 BUG_ON(atomic64_cmpxchg(&v, v2, v1) != v0);
129 BUG_ON(v.counter != r);
132 BUG_ON(atomic64_add_unless(&v, one, v0));
133 BUG_ON(v.counter != r);
136 BUG_ON(!atomic64_add_unless(&v, one, v1));
138 BUG_ON(v.counter != r);
140 #ifdef CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
142 BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
144 BUG_ON(v.counter != r);
147 BUG_ON(atomic64_dec_if_positive(&v) != -one);
148 BUG_ON(v.counter != r);
151 BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
152 BUG_ON(v.counter != r);
154 #warning Please implement atomic64_dec_if_positive for your architecture and select the above Kconfig symbol
158 BUG_ON(!atomic64_inc_not_zero(&v));
160 BUG_ON(v.counter != r);
163 BUG_ON(atomic64_inc_not_zero(&v));
164 BUG_ON(v.counter != r);
167 BUG_ON(!atomic64_inc_not_zero(&v));
169 BUG_ON(v.counter != r);
172 static __init int test_atomics(void)
178 pr_info("passed for %s platform %s CX8 and %s SSE\n",
181 #elif defined(CONFIG_X86_CMPXCHG64)
186 boot_cpu_has(X86_FEATURE_CX8) ? "with" : "without",
187 boot_cpu_has(X86_FEATURE_XMM) ? "with" : "without");
195 core_initcall(test_atomics);