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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: java-prs@gcc.gnu.org
Subject: [Bug libgcj/49193] New: __sync_xxxx builtins aren't used in sysdep/*/locks.h
Date: Fri, 27 May 2011 14:39:00 -0000	[thread overview]
Message-ID: <bug-49193-8172@http.gcc.gnu.org/bugzilla/> (raw)

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49193

           Summary: __sync_xxxx builtins aren't used in sysdep/*/locks.h
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libgcj
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: hjl.tools@gmail.com


sysdep/x86-64/locks.h has

inline static bool
compare_and_swap(volatile obj_addr_t *addr,
         obj_addr_t old,
         obj_addr_t new_val)
{
  char result;
#ifdef __x86_64__
  __asm__ __volatile__("lock; cmpxchgq %2, %0; setz %1"
          : "=m"(*(addr)), "=q"(result)
          : "r" (new_val), "a"(old), "m"(*addr)
          : "memory");
#else
  __asm__ __volatile__("lock; cmpxchgl %2, %0; setz %1"
               : "=m"(*addr), "=q"(result)
               : "r" (new_val), "a"(old), "m"(*addr)
               : "memory");
#endif
  return (bool) result;
}

We can replace them with __sync_xxxx builtins.


             reply	other threads:[~2011-05-27 14:39 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-05-27 14:39 hjl.tools at gmail dot com [this message]
2011-05-31 11:54 ` [Bug libgcj/49193] " hjl at gcc dot gnu.org
2011-08-02 17:08 ` hjl.tools at gmail dot com
2011-12-27  9:40 ` uros at gcc dot gnu.org

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