+2013-04-16 Andreas Schwab <schwab@suse.de>
+
+ * configure.ac (aarch64-*-*): Don't disable java.
+ * configure: Regenerate.
+
2013-04-10 Chung-Ju Wu <jasonwucj@gmail.com>
* MAINTAINERS (Write After Approval): Add myself.
+2013-04-16 Andreas Schwab <schwab@suse.de>
+
+ * configure.host: Add support for aarch64.
+ * sysdep/aarch64/locks.h: New file.
+
2013-03-12 Andrew John Hughes <gnu.andrew@redhat.com>
* include/posix-threads.h:
# This case statement supports per-CPU defaults.
case "${host}" in
+ aarch64*-linux*)
+ libgcj_interpreter=yes
+ sysdeps_dir=aarch64
+ ATOMICSPEC=-fuse-atomic-builtins
+ ;;
arm*-elf)
with_libffi_default=no
PROCESS=Ecos
sysdeps_dir=i386
DIVIDESPEC=-f%{m32:no-}use-divide-subroutine
;;
+ aarch64*-linux* )
+ slow_pthread_self=no
+ can_unwind_signal=no
+ CHECKREFSPEC=-fcheck-references
+ DIVIDESPEC=-fuse-divide-subroutine
+ ;;
arm*-linux* )
slow_pthread_self=no
can_unwind_signal=no
--- /dev/null
+// locks.h - Thread synchronization primitives. AArch64 implementation.
+
+#ifndef __SYSDEP_LOCKS_H__
+#define __SYSDEP_LOCKS_H__
+
+typedef size_t obj_addr_t; /* Integer type big enough for object */
+ /* address. */
+
+// Atomically replace *addr by new_val if it was initially equal to old.
+// Return true if the comparison succeeded.
+// Assumed to have acquire semantics, i.e. later memory operations
+// cannot execute before the compare_and_swap finishes.
+inline static bool
+compare_and_swap(volatile obj_addr_t *addr,
+ obj_addr_t old,
+ obj_addr_t new_val)
+{
+ return __sync_bool_compare_and_swap(addr, old, new_val);
+}
+
+// Set *addr to new_val with release semantics, i.e. making sure
+// that prior loads and stores complete before this
+// assignment.
+inline static void
+release_set(volatile obj_addr_t *addr, obj_addr_t new_val)
+{
+ __sync_synchronize();
+ *addr = new_val;
+}
+
+// Compare_and_swap with release semantics instead of acquire semantics.
+// On many architecture, the operation makes both guarantees, so the
+// implementation can be the same.
+inline static bool
+compare_and_swap_release(volatile obj_addr_t *addr,
+ obj_addr_t old,
+ obj_addr_t new_val)
+{
+ return __sync_bool_compare_and_swap(addr, old, new_val);
+}
+
+// Ensure that subsequent instructions do not execute on stale
+// data that was loaded from memory before the barrier.
+inline static void
+read_barrier()
+{
+ __sync_synchronize();
+}
+
+// Ensure that prior stores to memory are completed with respect to other
+// processors.
+inline static void
+write_barrier()
+{
+ __sync_synchronize();
+}
+#endif