107 "1:\n\t"
108 " mov %1, %%o3\n\t"
109 " ldx [%2], %%o2\n\t"
110 " casx [%2], %%o2, %%o3\n\t"
111 " cmp %%o2, %%o3\n\t"
112 " bne %%xcc, 1b\n\t"
113 " nop\n\t"
114 " mov %%o2, %0\n\t"
115 : "=r" (rv)
116 : "r" (exchange_value), "r" (dest)
117 : "memory", "o2", "o3");
118 return rv;
119 }
120
121 // No direct support for cmpxchg of bytes; emulate using int.
122 template<>
123 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
124
125 template<>
126 template<typename T>
127 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
128 T volatile* dest,
129 T compare_value,
130 atomic_memory_order order) const {
131 STATIC_ASSERT(4 == sizeof(T));
132 T rv;
133 __asm__ volatile(
134 " cas [%2], %3, %0"
135 : "=r" (rv)
136 : "0" (exchange_value), "r" (dest), "r" (compare_value)
137 : "memory");
138 return rv;
139 }
140
141 template<>
142 template<typename T>
143 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
144 T volatile* dest,
145 T compare_value,
146 atomic_memory_order order) const {
147 STATIC_ASSERT(8 == sizeof(T));
148 T rv;
149 __asm__ volatile(
150 " casx [%2], %3, %0"
151 : "=r" (rv)
152 : "0" (exchange_value), "r" (dest), "r" (compare_value)
153 : "memory");
154 return rv;
155 }
156
157 #endif // OS_CPU_LINUX_SPARC_ATOMIC_LINUX_SPARC_HPP
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107 "1:\n\t"
108 " mov %1, %%o3\n\t"
109 " ldx [%2], %%o2\n\t"
110 " casx [%2], %%o2, %%o3\n\t"
111 " cmp %%o2, %%o3\n\t"
112 " bne %%xcc, 1b\n\t"
113 " nop\n\t"
114 " mov %%o2, %0\n\t"
115 : "=r" (rv)
116 : "r" (exchange_value), "r" (dest)
117 : "memory", "o2", "o3");
118 return rv;
119 }
120
121 // No direct support for cmpxchg of bytes; emulate using int.
122 template<>
123 struct Atomic::PlatformCmpxchg<1> : Atomic::CmpxchgByteUsingInt {};
124
125 template<>
126 template<typename T>
127 inline T Atomic::PlatformCmpxchg<4>::operator()(T volatile* dest,
128 T compare_value,
129 T exchange_value,
130 atomic_memory_order order) const {
131 STATIC_ASSERT(4 == sizeof(T));
132 T rv;
133 __asm__ volatile(
134 " cas [%2], %3, %0"
135 : "=r" (rv)
136 : "0" (exchange_value), "r" (dest), "r" (compare_value)
137 : "memory");
138 return rv;
139 }
140
141 template<>
142 template<typename T>
143 inline T Atomic::PlatformCmpxchg<8>::operator()(T volatile* dest,
144 T compare_value,
145 T exchange_value,
146 atomic_memory_order order) const {
147 STATIC_ASSERT(8 == sizeof(T));
148 T rv;
149 __asm__ volatile(
150 " casx [%2], %3, %0"
151 : "=r" (rv)
152 : "0" (exchange_value), "r" (dest), "r" (compare_value)
153 : "memory");
154 return rv;
155 }
156
157 #endif // OS_CPU_LINUX_SPARC_ATOMIC_LINUX_SPARC_HPP
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