1 /*
2 * Copyright (c) 1999, 2013, 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 "runtime/atomic.hpp"
29 #include "runtime/os.hpp"
30 #include "vm_version_sparc.hpp"
31
32 // Implementation of class atomic
33
34 inline void Atomic::store (jbyte store_value, jbyte* dest) { *dest = store_value; }
35 inline void Atomic::store (jshort store_value, jshort* dest) { *dest = store_value; }
36 inline void Atomic::store (jint store_value, jint* dest) { *dest = store_value; }
37 inline void Atomic::store (jlong store_value, jlong* dest) { *dest = store_value; }
38 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
39 inline void Atomic::store_ptr(void* store_value, void* dest) { *(void**)dest = store_value; }
40
41 inline void Atomic::store (jbyte store_value, volatile jbyte* dest) { *dest = store_value; }
42 inline void Atomic::store (jshort store_value, volatile jshort* dest) { *dest = store_value; }
43 inline void Atomic::store (jint store_value, volatile jint* dest) { *dest = store_value; }
44 inline void Atomic::store (jlong store_value, volatile jlong* dest) { *dest = store_value; }
45 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
46 inline void Atomic::store_ptr(void* store_value, volatile void* dest) { *(void* volatile *)dest = store_value; }
47
48 inline void Atomic::inc (volatile jint* dest) { (void)add (1, dest); }
49 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
50 inline void Atomic::inc_ptr(volatile void* dest) { (void)add_ptr(1, dest); }
51
52 inline void Atomic::dec (volatile jint* dest) { (void)add (-1, dest); }
53 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
54 inline void Atomic::dec_ptr(volatile void* dest) { (void)add_ptr(-1, dest); }
55
56 inline jlong Atomic::load(volatile jlong* src) { return *src; }
57
58 inline jint Atomic::add (jint add_value, volatile jint* dest) {
59 intptr_t rv;
60 __asm__ volatile(
61 "1: \n\t"
62 " ld [%2], %%o2\n\t"
63 " add %1, %%o2, %%o3\n\t"
64 " cas [%2], %%o2, %%o3\n\t"
65 " cmp %%o2, %%o3\n\t"
66 " bne 1b\n\t"
67 " nop\n\t"
68 " add %1, %%o2, %0\n\t"
69 : "=r" (rv)
70 : "r" (add_value), "r" (dest)
71 : "memory", "o2", "o3");
72 return rv;
73 }
74
75 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
76 intptr_t rv;
77 #ifdef _LP64
78 __asm__ volatile(
79 "1: \n\t"
80 " ldx [%2], %%o2\n\t"
81 " add %0, %%o2, %%o3\n\t"
82 " casx [%2], %%o2, %%o3\n\t"
83 " cmp %%o2, %%o3\n\t"
84 " bne %%xcc, 1b\n\t"
85 " nop\n\t"
86 " add %0, %%o2, %0\n\t"
87 : "=r" (rv)
88 : "r" (add_value), "r" (dest)
89 : "memory", "o2", "o3");
90 #else
91 __asm__ volatile(
92 "1: \n\t"
93 " ld [%2], %%o2\n\t"
94 " add %1, %%o2, %%o3\n\t"
95 " cas [%2], %%o2, %%o3\n\t"
96 " cmp %%o2, %%o3\n\t"
97 " bne 1b\n\t"
98 " nop\n\t"
99 " add %1, %%o2, %0\n\t"
100 : "=r" (rv)
101 : "r" (add_value), "r" (dest)
102 : "memory", "o2", "o3");
103 #endif // _LP64
104 return rv;
105 }
106
107 inline void* Atomic::add_ptr(intptr_t add_value, volatile void* dest) {
108 return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
109 }
110
111
112 inline jint Atomic::xchg (jint exchange_value, volatile jint* dest) {
113 intptr_t rv = exchange_value;
114 __asm__ volatile(
115 " swap [%2],%1\n\t"
116 : "=r" (rv)
117 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
118 : "memory");
119 return rv;
120 }
121
122 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
123 intptr_t rv = exchange_value;
124 #ifdef _LP64
125 __asm__ volatile(
126 "1:\n\t"
127 " mov %1, %%o3\n\t"
128 " ldx [%2], %%o2\n\t"
129 " casx [%2], %%o2, %%o3\n\t"
130 " cmp %%o2, %%o3\n\t"
131 " bne %%xcc, 1b\n\t"
132 " nop\n\t"
133 " mov %%o2, %0\n\t"
134 : "=r" (rv)
135 : "r" (exchange_value), "r" (dest)
136 : "memory", "o2", "o3");
137 #else
138 __asm__ volatile(
139 "swap [%2],%1\n\t"
140 : "=r" (rv)
141 : "0" (exchange_value) /* we use same register as for return value */, "r" (dest)
142 : "memory");
143 #endif // _LP64
144 return rv;
145 }
146
147 inline void* Atomic::xchg_ptr(void* exchange_value, volatile void* dest) {
148 return (void*)xchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest);
149 }
150
151
152 inline jint Atomic::cmpxchg (jint exchange_value, volatile jint* dest, jint compare_value) {
153 jint rv;
154 __asm__ volatile(
155 " cas [%2], %3, %0"
156 : "=r" (rv)
157 : "0" (exchange_value), "r" (dest), "r" (compare_value)
158 : "memory");
159 return rv;
160 }
161
162 inline jlong Atomic::cmpxchg (jlong exchange_value, volatile jlong* dest, jlong compare_value) {
163 #ifdef _LP64
164 jlong rv;
165 __asm__ volatile(
166 " casx [%2], %3, %0"
167 : "=r" (rv)
168 : "0" (exchange_value), "r" (dest), "r" (compare_value)
169 : "memory");
170 return rv;
171 #else
172 assert(VM_Version::v9_instructions_work(), "cas only supported on v9");
173 volatile jlong_accessor evl, cvl, rv;
174 evl.long_value = exchange_value;
175 cvl.long_value = compare_value;
176
177 __asm__ volatile(
178 " sllx %2, 32, %2\n\t"
179 " srl %3, 0, %3\n\t"
180 " or %2, %3, %2\n\t"
181 " sllx %5, 32, %5\n\t"
182 " srl %6, 0, %6\n\t"
183 " or %5, %6, %5\n\t"
184 " casx [%4], %5, %2\n\t"
185 " srl %2, 0, %1\n\t"
186 " srlx %2, 32, %0\n\t"
187 : "=r" (rv.words[0]), "=r" (rv.words[1])
188 : "r" (evl.words[0]), "r" (evl.words[1]), "r" (dest), "r" (cvl.words[0]), "r" (cvl.words[1])
189 : "memory");
190
191 return rv.long_value;
192 #endif
193 }
194
195 inline intptr_t Atomic::cmpxchg_ptr(intptr_t exchange_value, volatile intptr_t* dest, intptr_t compare_value) {
196 intptr_t rv;
197 #ifdef _LP64
198 __asm__ volatile(
199 " casx [%2], %3, %0"
200 : "=r" (rv)
201 : "0" (exchange_value), "r" (dest), "r" (compare_value)
202 : "memory");
203 #else
204 __asm__ volatile(
205 " cas [%2], %3, %0"
206 : "=r" (rv)
207 : "0" (exchange_value), "r" (dest), "r" (compare_value)
208 : "memory");
209 #endif // _LP64
210 return rv;
211 }
212
213 inline void* Atomic::cmpxchg_ptr(void* exchange_value, volatile void* dest, void* compare_value) {
214 return (void*)cmpxchg_ptr((intptr_t)exchange_value, (volatile intptr_t*)dest, (intptr_t)compare_value);
215 }
216
217 #endif // OS_CPU_LINUX_SPARC_VM_ATOMIC_LINUX_SPARC_INLINE_HPP