src/os_cpu/linux_sparc/vm/atomic_linux_sparc.hpp

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

@@ -49,12 +49,25 @@
 inline void Atomic::dec_ptr(volatile intptr_t* dest) { (void)add_ptr(-1, dest); }
 inline void Atomic::dec_ptr(volatile void*     dest) { (void)add_ptr(-1, dest); }
 
 inline jlong Atomic::load(const volatile jlong* src) { return *src; }
 
-inline jint     Atomic::add    (jint     add_value, volatile jint*     dest) {
-  intptr_t rv;
+template<size_t byte_size>
+struct Atomic::PlatformAdd
+  : Atomic::AddAndFetch<Atomic::PlatformAdd<byte_size> >
+{
+  template<typename I, typename D>
+  D add_and_fetch(I add_value, D volatile* dest) const;
+};
+
+template<>
+template<typename I, typename D>
+inline D Atomic::PlatformAdd<4>::add_and_fetch(I add_value, D volatile* dest) const {
+  STATIC_CAST(4 == sizeof(I));
+  STATIC_CAST(4 == sizeof(D));
+
+  D rv;
   __asm__ volatile(
     "1: \n\t"
     " ld     [%2], %%o2\n\t"
     " add    %1, %%o2, %%o3\n\t"
     " cas    [%2], %%o2, %%o3\n\t"

@@ -66,12 +79,16 @@
     : "r" (add_value), "r" (dest)
     : "memory", "o2", "o3");
   return rv;
 }
 
-inline intptr_t Atomic::add_ptr(intptr_t add_value, volatile intptr_t* dest) {
-  intptr_t rv;
+template<typename I, typename D>
+inline D Atomic::PlatformAdd<8>::add_and_fetch(I add_value, D volatile* dest) const {
+  STATIC_CAST(8 == sizeof(I));
+  STATIC_CAST(8 == sizeof(D));
+
+  D rv;
   __asm__ volatile(
     "1: \n\t"
     " ldx    [%2], %%o2\n\t"
     " add    %1, %%o2, %%o3\n\t"
     " casx   [%2], %%o2, %%o3\n\t"

@@ -83,14 +100,13 @@
     : "r" (add_value), "r" (dest)
     : "memory", "o2", "o3");
   return rv;
 }
 
-inline void*    Atomic::add_ptr(intptr_t add_value, volatile void*     dest) {
-  return (void*)add_ptr((intptr_t)add_value, (volatile intptr_t*)dest);
-}
 
+template<>
+struct Atomic::PlatformAdd<2>: Atomic::AddShortUsingInt {};
 
 inline jint     Atomic::xchg    (jint     exchange_value, volatile jint*     dest) {
   intptr_t rv = exchange_value;
   __asm__ volatile(
     " swap   [%2],%1\n\t"