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_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP 26 #define OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP 27 28 #include "runtime/atomic.inline.hpp" 29 #include "runtime/orderAccess.hpp" 30 #include "runtime/os.hpp" 31 32 // Implementation of class OrderAccess. 33 34 // For Sun Studio - implementation is in solaris_i486.il. 35 // For gcc - implementation is just below. 36 extern "C" void _OrderAccess_acquire(); 37 extern "C" void _OrderAccess_fence(); 38 39 inline void OrderAccess::loadload() { acquire(); } 40 inline void OrderAccess::storestore() { release(); } 41 inline void OrderAccess::loadstore() { acquire(); } 42 inline void OrderAccess::storeload() { fence(); } 43 44 inline void OrderAccess::acquire() { 45 _OrderAccess_acquire(); 46 47 } 48 49 inline void OrderAccess::release() { 50 // Avoid hitting the same cache-line from 51 // different threads. 52 volatile jint local_dummy = 0; 53 } 54 55 inline void OrderAccess::fence() { 56 if (os::is_MP()) { 57 _OrderAccess_fence(); 58 } 59 } 60 61 #ifdef _GNU_SOURCE 62 63 extern "C" { 64 inline void _OrderAccess_acquire() { 65 volatile intptr_t local_dummy; 66 #ifdef AMD64 67 __asm__ volatile ("movq 0(%%rsp), %0" : "=r" (local_dummy) : : "memory"); 68 #else 69 __asm__ volatile ("movl 0(%%esp),%0" : "=r" (local_dummy) : : "memory"); 70 #endif // AMD64 71 } 72 inline void _OrderAccess_fence() { 73 // Always use locked addl since mfence is sometimes expensive 74 __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory"); 75 } 76 77 } 78 79 #endif // GNU_SOURCE 80 81 inline jbyte OrderAccess::load_acquire(volatile jbyte* p) { return *p; } 82 inline jshort OrderAccess::load_acquire(volatile jshort* p) { return *p; } 83 inline jint OrderAccess::load_acquire(volatile jint* p) { return *p; } 84 inline jlong OrderAccess::load_acquire(volatile jlong* p) { return Atomic::load(p); } 85 inline jubyte OrderAccess::load_acquire(volatile jubyte* p) { return *p; } 86 inline jushort OrderAccess::load_acquire(volatile jushort* p) { return *p; } 87 inline juint OrderAccess::load_acquire(volatile juint* p) { return *p; } 88 inline julong OrderAccess::load_acquire(volatile julong* p) { return Atomic::load((volatile jlong*)p); } 89 inline jfloat OrderAccess::load_acquire(volatile jfloat* p) { return *p; } 90 inline jdouble OrderAccess::load_acquire(volatile jdouble* p) { return jdouble_cast(Atomic::load((volatile jlong*)p)); } 91 92 inline intptr_t OrderAccess::load_ptr_acquire(volatile intptr_t* p) { return *p; } 93 inline void* OrderAccess::load_ptr_acquire(volatile void* p) { return *(void* volatile *)p; } 94 inline void* OrderAccess::load_ptr_acquire(const volatile void* p) { return *(void* const volatile *)p; } 95 96 inline void OrderAccess::release_store(volatile jbyte* p, jbyte v) { *p = v; } 97 inline void OrderAccess::release_store(volatile jshort* p, jshort v) { *p = v; } 98 inline void OrderAccess::release_store(volatile jint* p, jint v) { *p = v; } 99 inline void OrderAccess::release_store(volatile jlong* p, jlong v) { Atomic::store(v, p); } 100 inline void OrderAccess::release_store(volatile jubyte* p, jubyte v) { *p = v; } 101 inline void OrderAccess::release_store(volatile jushort* p, jushort v) { *p = v; } 102 inline void OrderAccess::release_store(volatile juint* p, juint v) { *p = v; } 103 inline void OrderAccess::release_store(volatile julong* p, julong v) { Atomic::store((jlong)v, (volatile jlong*)p); } 104 inline void OrderAccess::release_store(volatile jfloat* p, jfloat v) { *p = v; } 105 inline void OrderAccess::release_store(volatile jdouble* p, jdouble v) { release_store((volatile jlong*)p, jlong_cast(v)); } 106 107 inline void OrderAccess::release_store_ptr(volatile intptr_t* p, intptr_t v) { *p = v; } 108 inline void OrderAccess::release_store_ptr(volatile void* p, void* v) { *(void* volatile *)p = v; } 109 110 inline void OrderAccess::store_fence(jbyte* p, jbyte v) { *p = v; fence(); } 111 inline void OrderAccess::store_fence(jshort* p, jshort v) { *p = v; fence(); } 112 inline void OrderAccess::store_fence(jint* p, jint v) { *p = v; fence(); } 113 inline void OrderAccess::store_fence(jlong* p, jlong v) { *p = v; fence(); } 114 inline void OrderAccess::store_fence(jubyte* p, jubyte v) { *p = v; fence(); } 115 inline void OrderAccess::store_fence(jushort* p, jushort v) { *p = v; fence(); } 116 inline void OrderAccess::store_fence(juint* p, juint v) { *p = v; fence(); } 117 inline void OrderAccess::store_fence(julong* p, julong v) { *p = v; fence(); } 118 inline void OrderAccess::store_fence(jfloat* p, jfloat v) { *p = v; fence(); } 119 inline void OrderAccess::store_fence(jdouble* p, jdouble v) { *p = v; fence(); } 120 121 inline void OrderAccess::store_ptr_fence(intptr_t* p, intptr_t v) { *p = v; fence(); } 122 inline void OrderAccess::store_ptr_fence(void** p, void* v) { *p = v; fence(); } 123 124 inline void OrderAccess::release_store_fence(volatile jbyte* p, jbyte v) { *p = v; fence(); } 125 inline void OrderAccess::release_store_fence(volatile jshort* p, jshort v) { *p = v; fence(); } 126 inline void OrderAccess::release_store_fence(volatile jint* p, jint v) { *p = v; fence(); } 127 inline void OrderAccess::release_store_fence(volatile jlong* p, jlong v) { release_store(p, v); fence(); } 128 inline void OrderAccess::release_store_fence(volatile jubyte* p, jubyte v) { *p = v; fence(); } 129 inline void OrderAccess::release_store_fence(volatile jushort* p, jushort v) { *p = v; fence(); } 130 inline void OrderAccess::release_store_fence(volatile juint* p, juint v) { *p = v; fence(); } 131 inline void OrderAccess::release_store_fence(volatile julong* p, julong v) { release_store((jlong *)p, (jlong)v); fence(); } 132 inline void OrderAccess::release_store_fence(volatile jfloat* p, jfloat v) { *p = v; fence(); } 133 inline void OrderAccess::release_store_fence(volatile jdouble* p, jdouble v) { release_store_fence((volatile jlong*)p, jlong_cast(v)); } 134 135 inline void OrderAccess::release_store_ptr_fence(volatile intptr_t* p, intptr_t v) { *p = v; fence(); } 136 inline void OrderAccess::release_store_ptr_fence(volatile void* p, void* v) { *(void* volatile *)p = v; fence(); } 137 138 #endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_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_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP 26 #define OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP 27 28 #include "runtime/atomic.inline.hpp" 29 #include "runtime/orderAccess.hpp" 30 #include "runtime/os.hpp" 31 32 // Implementation of class OrderAccess. 33 34 // A compiler barrier, forcing the C++ compiler to invalidate all memory assumptions 35 inline void compiler_barrier() { 36 __asm__ volatile ("" : : : "memory"); 37 } 38 39 inline void OrderAccess::loadload() { compiler_barrier(); } 40 inline void OrderAccess::storestore() { compiler_barrier(); } 41 inline void OrderAccess::loadstore() { compiler_barrier(); } 42 inline void OrderAccess::storeload() { fence(); } 43 44 inline void OrderAccess::acquire() { compiler_barrier(); } 45 inline void OrderAccess::release() { compiler_barrier(); } 46 47 inline void OrderAccess::fence() { 48 if (os::is_MP()) { 49 #ifdef AMD64 50 __asm__ volatile ("lock; addl $0,0(%%rsp)" : : : "cc", "memory"); 51 #else 52 __asm__ volatile ("lock; addl $0,0(%%esp)" : : : "cc", "memory"); 53 #endif 54 } 55 compiler_barrier(); 56 } 57 58 #define VM_HAS_GENERALIZED_ORDER_ACCESS 1 59 60 #endif // OS_CPU_SOLARIS_X86_VM_ORDERACCESS_SOLARIS_X86_INLINE_HPP |