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_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
26 #define OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
27
28 // Implementation of class atomic
29
30 // Implement ADD using a CAS loop.
31 template<size_t byte_size>
32 struct Atomic::PlatformAdd {
33 template<typename I, typename D>
34 inline D operator()(I add_value, D volatile* dest) const {
35 D old_value = *dest;
36 while (true) {
37 D new_value = old_value + add_value;
38 D result = cmpxchg(new_value, dest, old_value);
39 if (result == old_value) break;
40 old_value = result;
41 }
42 return old_value + add_value;
43 }
44 };
45
46 template<>
47 template<typename T>
48 inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
49 T volatile* dest) const {
50 STATIC_ASSERT(4 == sizeof(T));
51 __asm__ volatile ( "swap [%2],%0"
52 : "=r" (exchange_value)
53 : "0" (exchange_value), "r" (dest)
54 : "memory");
55 return exchange_value;
56 }
57
58 template<>
59 template<typename T>
60 inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
61 T volatile* dest) const {
62 STATIC_ASSERT(8 == sizeof(T));
63 T old_value = *dest;
64 while (true) {
65 T result = cmpxchg(exchange_value, dest, old_value);
66 if (result == old_value) break;
67 old_value = result;
68 }
69 return old_value;
70 }
71
72 // No direct support for cmpxchg of bytes; emulate using int.
73 template<>
74 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
75
76 template<>
77 template<typename T>
78 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
79 T volatile* dest,
80 T compare_value,
81 cmpxchg_memory_order order) const {
82 STATIC_ASSERT(4 == sizeof(T));
83 T rv;
84 __asm__ volatile(
85 " cas [%2], %3, %0"
86 : "=r" (rv)
87 : "0" (exchange_value), "r" (dest), "r" (compare_value)
88 : "memory");
89 return rv;
90 }
91
92 template<>
93 template<typename T>
94 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
95 T volatile* dest,
96 T compare_value,
97 cmpxchg_memory_order order) const {
98 STATIC_ASSERT(8 == sizeof(T));
99 T rv;
100 __asm__ volatile(
101 " casx [%2], %3, %0"
102 : "=r" (rv)
103 : "0" (exchange_value), "r" (dest), "r" (compare_value)
104 : "memory");
105 return rv;
106 }
107
108 #endif // OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
|
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_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
26 #define OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
27
28 // Implementation of class atomic
29
30 // Implement ADD using a CAS loop.
31 template<size_t byte_size>
32 struct Atomic::PlatformAdd {
33 template<typename I, typename D>
34 inline D operator()(I add_value, D volatile* dest, atomic_memory_order order) const {
35 D old_value = *dest;
36 while (true) {
37 D new_value = old_value + add_value;
38 D result = cmpxchg(new_value, dest, old_value);
39 if (result == old_value) break;
40 old_value = result;
41 }
42 return old_value + add_value;
43 }
44 };
45
46 template<>
47 template<typename T>
48 inline T Atomic::PlatformXchg<4>::operator()(T exchange_value,
49 T volatile* dest,
50 atomic_memory_order order) const {
51 STATIC_ASSERT(4 == sizeof(T));
52 __asm__ volatile ( "swap [%2],%0"
53 : "=r" (exchange_value)
54 : "0" (exchange_value), "r" (dest)
55 : "memory");
56 return exchange_value;
57 }
58
59 template<>
60 template<typename T>
61 inline T Atomic::PlatformXchg<8>::operator()(T exchange_value,
62 T volatile* dest,
63 atomic_memory_order order) const {
64 STATIC_ASSERT(8 == sizeof(T));
65 T old_value = *dest;
66 while (true) {
67 T result = cmpxchg(exchange_value, dest, old_value);
68 if (result == old_value) break;
69 old_value = result;
70 }
71 return old_value;
72 }
73
74 // No direct support for cmpxchg of bytes; emulate using int.
75 template<>
76 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
77
78 template<>
79 template<typename T>
80 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
81 T volatile* dest,
82 T compare_value,
83 atomic_memory_order order) const {
84 STATIC_ASSERT(4 == sizeof(T));
85 T rv;
86 __asm__ volatile(
87 " cas [%2], %3, %0"
88 : "=r" (rv)
89 : "0" (exchange_value), "r" (dest), "r" (compare_value)
90 : "memory");
91 return rv;
92 }
93
94 template<>
95 template<typename T>
96 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
97 T volatile* dest,
98 T compare_value,
99 atomic_memory_order order) const {
100 STATIC_ASSERT(8 == sizeof(T));
101 T rv;
102 __asm__ volatile(
103 " casx [%2], %3, %0"
104 : "=r" (rv)
105 : "0" (exchange_value), "r" (dest), "r" (compare_value)
106 : "memory");
107 return rv;
108 }
109
110 #endif // OS_CPU_SOLARIS_SPARC_VM_ATOMIC_SOLARIS_SPARC_HPP
|