rev 13452 : [mq]: coleen_review1
rev 13458 : imported patch cmpxchg_using_helper

   1 /*
   2  * Copyright (c) 1999, 2017, 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_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP
  26 #define OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP
  27 
  28 inline void Atomic::store    (jbyte    store_value, jbyte*    dest) { *dest = store_value; }
  29 inline void Atomic::store    (jshort   store_value, jshort*   dest) { *dest = store_value; }
  30 inline void Atomic::store    (jint     store_value, jint*     dest) { *dest = store_value; }
  31 
  32 
  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 inline void Atomic::inc    (volatile jint*     dest) { (void)add    (1, dest); }
  43 inline void Atomic::inc_ptr(volatile intptr_t* dest) { (void)add_ptr(1, dest); }
  44 inline void Atomic::inc_ptr(volatile void*     dest) { (void)add_ptr(1, dest); }
  45 
  46 inline void Atomic::dec    (volatile jint*     dest) { (void)add    (-1, dest); }
  47 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
  48 inline void Atomic::dec_ptr(volatile void*     dest) { (void)add_ptr(-1, dest); }
  49 
  50 // For Sun Studio - implementation is in solaris_x86_64.il.
  51 
  52 extern "C" {
  53   jint _Atomic_add(jint add_value, volatile jint* dest);
  54   jint _Atomic_xchg(jint exchange_value, volatile jint* dest);
  55   jbyte _Atomic_cmpxchg_byte(jbyte exchange_value, volatile jbyte* dest,
  56                              jbyte compare_value);
  57   jint _Atomic_cmpxchg(jint exchange_value, volatile jint* dest,
  58                        jint compare_value);
  59   jlong _Atomic_cmpxchg_long(jlong exchange_value, volatile jlong* dest,
  60                              jlong compare_value);
  61 }
  62 
  63 inline jint     Atomic::add    (jint     add_value, volatile jint*     dest) {
  64   return _Atomic_add(add_value, dest);
  65 }
  66 
  67 inline jint     Atomic::xchg       (jint     exchange_value, volatile jint*     dest) {
  68   return _Atomic_xchg(exchange_value, dest);
  69 }
  70 
  71 // Not using cmpxchg_using_stub here, because some configurations of
  72 // Solaris compiler don't deal well with passing a "defined in .il"
  73 // function as an argument.  We *should* switch to using gcc-style
  74 // inline assembly, but attempting to do so with Studio 12.4 ran into
  75 // segfaults.
  76 
  77 template<>
  78 template<typename T>
  79 inline T Atomic::PlatformCmpxchg<1>::operator()(T exchange_value,
  80                                                 T volatile* dest,
  81                                                 T compare_value,
  82                                                 cmpxchg_memory_order order) const {

  83   return IntegerTypes::cast<T>(
  84     _Atomic_cmpxchg_byte(IntegerTypes::cast<jbyte>(exchange_value),
  85                          reinterpret_cast<jbyte volatile*>(dest),
  86                          IntegerTypes::cast<jbyte>(compare_value)));
  87 }
  88 
  89 template<>
  90 template<typename T>
  91 inline T Atomic::PlatformCmpxchg<4>::operator()(T exchange_value,
  92                                                 T volatile* dest,
  93                                                 T compare_value,
  94                                                 cmpxchg_memory_order order) const {

  95   return IntegerTypes::cast<T>(
  96     _Atomic_cmpxchg(IntegerTypes::cast<jint>(exchange_value),
  97                     reinterpret_cast<jint volatile*>(dest),
  98                     IntegerTypes::cast<jint>(compare_value)));
  99 }
 100 
 101 template<>
 102 template<typename T>
 103 inline T Atomic::PlatformCmpxchg<8>::operator()(T exchange_value,
 104                                                 T volatile* dest,
 105                                                 T compare_value,
 106                                                 cmpxchg_memory_order order) const {

 107   return IntegerTypes::cast<T>(
 108     _Atomic_cmpxchg_long(IntegerTypes::cast<jlong>(exchange_value),
 109                          reinterpret_cast<jlong volatile*>(dest),
 110                          IntegerTypes::cast<jlong>(compare_value)));
 111 }
 112 
 113 inline void Atomic::store    (jlong    store_value, jlong*             dest) { *dest = store_value; }
 114 inline void Atomic::store    (jlong    store_value, volatile jlong*    dest) { *dest = store_value; }
 115 extern "C" jlong _Atomic_add_long(jlong add_value, volatile jlong* dest);
 116 extern "C" jlong _Atomic_xchg_long(jlong exchange_value, volatile jlong* dest);
 117 
 118 inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
 119   return (intptr_t)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
 120 }
 121 
 122 inline void*    Atomic::add_ptr(intptr_t add_value, volatile void*     dest) {
 123   return (void*)_Atomic_add_long((jlong)add_value, (volatile jlong*)dest);
 124 }
 125 
 126 inline intptr_t Atomic::xchg_ptr(intptr_t exchange_value, volatile intptr_t* dest) {
 127   return (intptr_t)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
 128 }
 129 
 130 inline void*    Atomic::xchg_ptr(void*    exchange_value, volatile void*     dest) {
 131   return (void*)_Atomic_xchg_long((jlong)exchange_value, (volatile jlong*)dest);
 132 }
 133 
 134 inline jlong Atomic::load(const volatile jlong* src) { return *src; }
 135 
 136 #endif // OS_CPU_SOLARIS_X86_VM_ATOMIC_SOLARIS_X86_HPP
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