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src/os_cpu/linux_x86/vm/atomic_linux_x86.hpp

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rev 13452 : imported patch Atomic_cmpxchg
rev 13453 : imported patch Atomic_add
rev 13454 : [mq]: Atomic_add_v2


  23  */
  24 
  25 #ifndef OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP
  26 #define OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP
  27 
  28 // Implementation of class atomic
  29 
  30 inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
  31 inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
  32 inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
  33 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
  34 inline void Atomic::store_ptr(void*    store_value, void*     dest) { *(void**)dest = store_value; }
  35 
  36 inline void Atomic::store    (jbyte    store_value, volatile jbyte*    dest) { *dest = store_value; }
  37 inline void Atomic::store    (jshort   store_value, volatile jshort*   dest) { *dest = store_value; }
  38 inline void Atomic::store    (jint     store_value, volatile jint*     dest) { *dest = store_value; }
  39 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
  40 inline void Atomic::store_ptr(void*    store_value, volatile void*     dest) { *(void* volatile *)dest = store_value; }
  41 
  42 
  43 inline jint     Atomic::add    (jint     add_value, volatile jint*     dest) {
  44   jint addend = add_value;












  45   __asm__ volatile (  "lock xaddl %0,(%2)"
  46                     : "=r" (addend)
  47                     : "0" (addend), "r" (dest)
  48                     : "cc", "memory");
  49   return addend + add_value;
  50 }
  51 



  52 inline void Atomic::inc    (volatile jint*     dest) {
  53   __asm__ volatile (  "lock addl $1,(%0)" :
  54                     : "r" (dest) : "cc", "memory");
  55 }
  56 
  57 inline void Atomic::inc_ptr(volatile void*     dest) {
  58   inc_ptr((volatile intptr_t*)dest);
  59 }
  60 
  61 inline void Atomic::dec    (volatile jint*     dest) {
  62   __asm__ volatile (  "lock subl $1,(%0)" :
  63                     : "r" (dest) : "cc", "memory");
  64 }
  65 
  66 inline void Atomic::dec_ptr(volatile void*     dest) {
  67   dec_ptr((volatile intptr_t*)dest);
  68 }
  69 
  70 inline jint     Atomic::xchg    (jint     exchange_value, volatile jint*     dest) {
  71   __asm__ volatile (  "xchgl (%2),%0"


  94 }
  95 
  96 template<>
  97 template<typename T>
  98 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
  99                                                 T volatile* dest,
 100                                                 T compare_value,
 101                                                 cmpxchg_memory_order /* order */) const {
 102   STATIC_ASSERT(4 == sizeof(T));
 103   __asm__ volatile ("lock cmpxchgl %1,(%3)"
 104                     : "=a" (exchange_value)
 105                     : "r" (exchange_value), "a" (compare_value), "r" (dest)
 106                     : "cc", "memory");
 107   return exchange_value;
 108 }
 109 
 110 #ifdef AMD64
 111 inline void Atomic::store    (jlong    store_value, jlong*    dest) { *dest = store_value; }
 112 inline void Atomic::store    (jlong    store_value, volatile jlong*    dest) { *dest = store_value; }
 113 
 114 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
 115   intptr_t addend = add_value;




 116   __asm__ __volatile__ ("lock xaddq %0,(%2)"
 117                         : "=r" (addend)
 118                         : "0" (addend), "r" (dest)
 119                         : "cc", "memory");
 120   return addend + add_value;
 121 }
 122 
 123 inline void*    Atomic::add_ptr(intptr_t add_value, volatile void*     dest) {
 124   return (void*)add_ptr(add_value, (volatile intptr_t*)dest);
 125 }
 126 
 127 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
 128   __asm__ __volatile__ ("lock addq $1,(%0)"
 129                         :
 130                         : "r" (dest)
 131                         : "cc", "memory");
 132 }
 133 
 134 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
 135   __asm__ __volatile__ ("lock subq $1,(%0)"
 136                         :
 137                         : "r" (dest)
 138                         : "cc", "memory");
 139 }
 140 
 141 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
 142   __asm__ __volatile__ ("xchgq (%2),%0"
 143                         : "=r" (exchange_value)
 144                         : "0" (exchange_value), "r" (dest)


 146   return exchange_value;
 147 }
 148 
 149 template<>
 150 template<typename T>
 151 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 152                                                 T volatile* dest,
 153                                                 T compare_value,
 154                                                 cmpxchg_memory_order /* order */) const {
 155   STATIC_ASSERT(8 == sizeof(T));
 156   __asm__ __volatile__ ("lock cmpxchgq %1,(%3)"
 157                         : "=a" (exchange_value)
 158                         : "r" (exchange_value), "a" (compare_value), "r" (dest)
 159                         : "cc", "memory");
 160   return exchange_value;
 161 }
 162 
 163 inline jlong Atomic::load(const volatile jlong* src) { return *src; }
 164 
 165 #else // !AMD64
 166 
 167 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
 168   return (intptr_t)Atomic::add((jint)add_value, (volatile jint*)dest);
 169 }
 170 
 171 inline void*    Atomic::add_ptr(intptr_t add_value, volatile void*     dest) {
 172   return (void*)Atomic::add((jint)add_value, (volatile jint*)dest);
 173 }
 174 
 175 
 176 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
 177   inc((volatile jint*)dest);
 178 }
 179 
 180 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
 181   dec((volatile jint*)dest);
 182 }
 183 
 184 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
 185   return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
 186 }
 187 
 188 extern "C" {
 189   // defined in linux_x86.s
 190   jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong);
 191   void _Atomic_move_long(const volatile jlong* src, volatile jlong* dst);
 192 }
 193 
 194 template<>




  23  */
  24 
  25 #ifndef OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP
  26 #define OS_CPU_LINUX_X86_VM_ATOMIC_LINUX_X86_HPP
  27 
  28 // Implementation of class atomic
  29 
  30 inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
  31 inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
  32 inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
  33 inline void Atomic::store_ptr(intptr_t store_value, intptr_t* dest) { *dest = store_value; }
  34 inline void Atomic::store_ptr(void*    store_value, void*     dest) { *(void**)dest = store_value; }
  35 
  36 inline void Atomic::store    (jbyte    store_value, volatile jbyte*    dest) { *dest = store_value; }
  37 inline void Atomic::store    (jshort   store_value, volatile jshort*   dest) { *dest = store_value; }
  38 inline void Atomic::store    (jint     store_value, volatile jint*     dest) { *dest = store_value; }
  39 inline void Atomic::store_ptr(intptr_t store_value, volatile intptr_t* dest) { *dest = store_value; }
  40 inline void Atomic::store_ptr(void*    store_value, volatile void*     dest) { *(void* volatile *)dest = store_value; }
  41 
  42 
  43 template<size_t byte_size>
  44 struct Atomic::PlatformAdd
  45   : Atomic::FetchAndAdd<Atomic::PlatformAdd<byte_size> >
  46 {
  47   template<typename I, typename D>
  48   D fetch_and_add(I add_value, D volatile* dest) const;
  49 };
  50 
  51 template<>
  52 template<typename I, typename D>
  53 inline D Atomic::PlatformAdd<4>::fetch_and_add(I add_value, D volatile* dest) const {
  54   STATIC_ASSERT(4 == sizeof(I));
  55   STATIC_ASSERT(4 == sizeof(D));
  56   D old_value;
  57   __asm__ volatile (  "lock xaddl %0,(%2)"
  58                     : "=r" (old_value)
  59                     : "0" (add_value), "r" (dest)
  60                     : "cc", "memory");
  61   return old_value;
  62 }
  63 
  64 template<>
  65 struct Atomic::PlatformAdd<2>: Atomic::AddShortUsingInt {};
  66 
  67 inline void Atomic::inc    (volatile jint*     dest) {
  68   __asm__ volatile (  "lock addl $1,(%0)" :
  69                     : "r" (dest) : "cc", "memory");
  70 }
  71 
  72 inline void Atomic::inc_ptr(volatile void*     dest) {
  73   inc_ptr((volatile intptr_t*)dest);
  74 }
  75 
  76 inline void Atomic::dec    (volatile jint*     dest) {
  77   __asm__ volatile (  "lock subl $1,(%0)" :
  78                     : "r" (dest) : "cc", "memory");
  79 }
  80 
  81 inline void Atomic::dec_ptr(volatile void*     dest) {
  82   dec_ptr((volatile intptr_t*)dest);
  83 }
  84 
  85 inline jint     Atomic::xchg    (jint     exchange_value, volatile jint*     dest) {
  86   __asm__ volatile (  "xchgl (%2),%0"


 109 }
 110 
 111 template<>
 112 template<typename T>
 113 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
 114                                                 T volatile* dest,
 115                                                 T compare_value,
 116                                                 cmpxchg_memory_order /* order */) const {
 117   STATIC_ASSERT(4 == sizeof(T));
 118   __asm__ volatile ("lock cmpxchgl %1,(%3)"
 119                     : "=a" (exchange_value)
 120                     : "r" (exchange_value), "a" (compare_value), "r" (dest)
 121                     : "cc", "memory");
 122   return exchange_value;
 123 }
 124 
 125 #ifdef AMD64
 126 inline void Atomic::store    (jlong    store_value, jlong*    dest) { *dest = store_value; }
 127 inline void Atomic::store    (jlong    store_value, volatile jlong*    dest) { *dest = store_value; }
 128 
 129 template<>
 130 template<typename I, typename D>
 131 inline D Atomic::PlatformAdd<8>::fetch_and_add(I add_value, D volatile* dest) const {
 132   STATIC_ASSERT(8 == sizeof(I));
 133   STATIC_ASSERT(8 == sizeof(D));
 134   D old_value;
 135   __asm__ __volatile__ ("lock xaddq %0,(%2)"
 136                         : "=r" (old_value)
 137                         : "0" (add_value), "r" (dest)
 138                         : "cc", "memory");
 139   return old_value;




 140 }
 141 
 142 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
 143   __asm__ __volatile__ ("lock addq $1,(%0)"
 144                         :
 145                         : "r" (dest)
 146                         : "cc", "memory");
 147 }
 148 
 149 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
 150   __asm__ __volatile__ ("lock subq $1,(%0)"
 151                         :
 152                         : "r" (dest)
 153                         : "cc", "memory");
 154 }
 155 
 156 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
 157   __asm__ __volatile__ ("xchgq (%2),%0"
 158                         : "=r" (exchange_value)
 159                         : "0" (exchange_value), "r" (dest)


 161   return exchange_value;
 162 }
 163 
 164 template<>
 165 template<typename T>
 166 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 167                                                 T volatile* dest,
 168                                                 T compare_value,
 169                                                 cmpxchg_memory_order /* order */) const {
 170   STATIC_ASSERT(8 == sizeof(T));
 171   __asm__ __volatile__ ("lock cmpxchgq %1,(%3)"
 172                         : "=a" (exchange_value)
 173                         : "r" (exchange_value), "a" (compare_value), "r" (dest)
 174                         : "cc", "memory");
 175   return exchange_value;
 176 }
 177 
 178 inline jlong Atomic::load(const volatile jlong* src) { return *src; }
 179 
 180 #else // !AMD64









 181 
 182 inline void Atomic::inc_ptr(volatile intptr_t* dest) {
 183   inc((volatile jint*)dest);
 184 }
 185 
 186 inline void Atomic::dec_ptr(volatile intptr_t* dest) {
 187   dec((volatile jint*)dest);
 188 }
 189 
 190 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
 191   return (intptr_t)xchg((jint)exchange_value, (volatile jint*)dest);
 192 }
 193 
 194 extern "C" {
 195   // defined in linux_x86.s
 196   jlong _Atomic_cmpxchg_long(jlong, volatile jlong*, jlong);
 197   void _Atomic_move_long(const volatile jlong* src, volatile jlong* dst);
 198 }
 199 
 200 template<>


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