1 /*
2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP
26 #define OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP
27
28 #include "orderAccess_linux_sparc.inline.hpp"
29 #include "runtime/atomic.hpp"
30 #include "runtime/os.hpp"
31 #include "vm_version_sparc.hpp"
32
33 // Implementation of class atomic
34
35 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
36 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
37 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
38 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
39 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
40 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
41
42 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
43 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
44 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
45 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
46 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
47 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
48
49 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
50 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
51 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
52
53 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
54 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
55 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
56
57 inline jlong Atomic::load(volatile jlong* src) { return *src; }
58
59 inline jint Atomic::add (jint add_value, volatile jint* dest) {
60 intptr_t rv;
61 __asm__ volatile(
62 "1: \n\t"
63 " ld [%2], %%o2\n\t"
64 " add %1, %%o2, %%o3\n\t"
65 " cas [%2], %%o2, %%o3\n\t"
66 " cmp %%o2, %%o3\n\t"
67 " bne 1b\n\t"
68 " nop\n\t"
69 " add %1, %%o2, %0\n\t"
70 : "=r" (rv)
71 : "r" (add_value), "r" (dest)
72 : "memory", "o2", "o3");
73 return rv;
74 }
75
76 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
77 intptr_t rv;
78 #ifdef _LP64
79 __asm__ volatile(
80 "1: \n\t"
81 " ldx [%2], %%o2\n\t"
82 " add %0, %%o2, %%o3\n\t"
83 " casx [%2], %%o2, %%o3\n\t"
84 " cmp %%o2, %%o3\n\t"
85 " bne %%xcc, 1b\n\t"
86 " nop\n\t"
87 " add %0, %%o2, %0\n\t"
88 : "=r" (rv)
89 : "r" (add_value), "r" (dest)
90 : "memory", "o2", "o3");
91 #else
92 __asm__ volatile(
93 "1: \n\t"
94 " ld [%2], %%o2\n\t"
95 " add %1, %%o2, %%o3\n\t"
96 " cas [%2], %%o2, %%o3\n\t"
97 " cmp %%o2, %%o3\n\t"
98 " bne 1b\n\t"
99 " nop\n\t"
100 " add %1, %%o2, %0\n\t"
101 : "=r" (rv)
102 : "r" (add_value), "r" (dest)
103 : "memory", "o2", "o3");
104 #endif // _LP64
105 return rv;
106 }
107
108 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
109 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
110 }
111
112
113 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
114 intptr_t rv = exchange_value;
115 __asm__ volatile(
116 " swap [%2],%1\n\t"
117 : "=r" (rv)
118 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
119 : "memory");
120 return rv;
121 }
122
123 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
124 intptr_t rv = exchange_value;
125 #ifdef _LP64
126 __asm__ volatile(
127 "1:\n\t"
128 " mov %1, %%o3\n\t"
129 " ldx [%2], %%o2\n\t"
130 " casx [%2], %%o2, %%o3\n\t"
131 " cmp %%o2, %%o3\n\t"
132 " bne %%xcc, 1b\n\t"
133 " nop\n\t"
134 " mov %%o2, %0\n\t"
135 : "=r" (rv)
136 : "r" (exchange_value), "r" (dest)
137 : "memory", "o2", "o3");
138 #else
139 __asm__ volatile(
140 "swap [%2],%1\n\t"
141 : "=r" (rv)
142 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
143 : "memory");
144 #endif // _LP64
145 return rv;
146 }
147
148 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
149 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
150 }
151
152
153 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
154 jint rv;
155 __asm__ volatile(
156 " cas [%2], %3, %0"
157 : "=r" (rv)
158 : "0" (exchange_value), "r" (dest), "r" (compare_value)
159 : "memory");
160 return rv;
161 }
162
163 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
164 #ifdef _LP64
165 jlong rv;
166 __asm__ volatile(
167 " casx [%2], %3, %0"
168 : "=r" (rv)
169 : "0" (exchange_value), "r" (dest), "r" (compare_value)
170 : "memory");
171 return rv;
172 #else
173 assert(VM_Version::v9_instructions_work(), "cas only supported on v9");
174 volatile jlong_accessor evl, cvl, rv;
175 evl.long_value = exchange_value;
176 cvl.long_value = compare_value;
177
178 __asm__ volatile(
179 " sllx %2, 32, %2\n\t"
180 " srl %3, 0, %3\n\t"
181 " or %2, %3, %2\n\t"
182 " sllx %5, 32, %5\n\t"
183 " srl %6, 0, %6\n\t"
184 " or %5, %6, %5\n\t"
185 " casx [%4], %5, %2\n\t"
186 " srl %2, 0, %1\n\t"
187 " srlx %2, 32, %0\n\t"
188 : "=r" (rv.words[0]), "=r" (rv.words[1])
189 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1])
190 : "memory");
191
192 return rv.long_value;
193 #endif
194 }
195
196 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
197 intptr_t rv;
198 #ifdef _LP64
199 __asm__ volatile(
200 " casx [%2], %3, %0"
201 : "=r" (rv)
202 : "0" (exchange_value), "r" (dest), "r" (compare_value)
203 : "memory");
204 #else
205 __asm__ volatile(
206 " cas [%2], %3, %0"
207 : "=r" (rv)
208 : "0" (exchange_value), "r" (dest), "r" (compare_value)
209 : "memory");
210 #endif // _LP64
211 return rv;
212 }
213
214 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
215 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
216 }
217
218 #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP