OpenE2K/gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Update sysdep/sh/locks.h with atomic builtins

Browse Source 
Update sysdep/sh/locks.h with atomic builtins
	* sysdep/sh/locks.h (__cas_lock): Remove.
	(__cas_start_atomic, __cas_end_atomic): Likewise.
	(compare_and_swap): Call __sync_bool_compare_and_swap.

From-SVN: r188640
This commit is contained in:
Kaz Kojima 2012-06-14 22:58:05 +00:00
parent 2bcf3c5c3a
commit bed3fc4127
2 changed files with 7 additions and 35 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libjava/ChangeLog
View File

@ -1,3 +1,9 @@
2012-06-14 Kaz Kojima <kkojima@gcc.gnu.org>
* sysdep/sh/locks.h (__cas_lock): Remove.
(__cas_start_atomic, __cas_end_atomic): Likewise.
(compare_and_swap): Call __sync_bool_compare_and_swap.
2012-05-21 Benjamin Kosnik <bkoz@redhat.com>
PR libstdc++/52700

36
libjava/sysdep/sh/locks.h
View File

@ -14,45 +14,11 @@ details. */
typedef size_t obj_addr_t; /* Integer type big enough for object */
/* address. */
static unsigned char __cas_lock = 0;
inline static void
__cas_start_atomic (void)
{
unsigned int val;
do
__asm__ __volatile__ ("tas.b @%1; movt %0"
: "=r" (val)
: "r" (&__cas_lock)
: "memory");
while (val == 0);
}
inline static void
__cas_end_atomic (void)
{
__asm__ __volatile__ (" " : : : "memory");
__cas_lock = 0;
}
inline static bool
compare_and_swap (volatile obj_addr_t *addr, obj_addr_t old,
obj_addr_t new_val)
{
bool ret;
__cas_start_atomic ();
if (*addr != old)
ret = false;
else
{
*addr = new_val;
ret = true;
}
__cas_end_atomic ();
return ret;
return __sync_bool_compare_and_swap (addr, old, new_val);
}
inline static void