configure.host: Add SH support.

	* configure.host: Add SH support.
        * sysdep/sh/locks.h: New file.

From-SVN: r55922

3 files changed, 85 insertions, 0 deletions

diff --git a/libjava/ChangeLog b/libjava/ChangeLog
index e5734ca..6c8b3d2 100644
--- a/libjava/ChangeLog
+++ b/libjava/ChangeLog
@@ -1,3 +1,8 @@
+2002-08-01  Kaz Kojima  <kkojima@gcc.gnu.org>
+
+	* configure.host: Add SH support.
+        * sysdep/sh/locks.h: New file.
+
 2002-07-31  Bryce McKinlay  <bryce@waitaki.otago.ac.nz>
 
 	* java/awt/Frame.java (Frame): Remove println calls.
diff --git a/libjava/configure.host b/libjava/configure.host
index a4819f3..5baabd4 100644
--- a/libjava/configure.host
+++ b/libjava/configure.host
@@ -135,6 +135,14 @@ case "${host}" in
 	enable_getenv_properties_default=no
 	enable_main_args_default=no
 	;;
+  sh-* | sh[34]*-*)
+	sysdeps_dir=sh
+	libgcj_flags="${libgcj_flags} -mieee"
+	libgcj_interpreter=yes
+	CHECKREFSPEC=-fcheck-references
+	EXCEPTIONSPEC=
+	enable_hash_synchronization_default=yes
+	;;
 esac
 
 # This case statement supports generic port properties and may refine
diff --git a/libjava/sysdep/sh/locks.h b/libjava/sysdep/sh/locks.h
new file mode 100644
index 0000000..f6076d6
--- /dev/null
+++ b/libjava/sysdep/sh/locks.h
@@ -0,0 +1,72 @@
+// locks.h - Thread synchronization primitives. SuperH implementation.
+
+/* Copyright (C) 2002  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+#ifndef __SYSDEP_LOCKS_H__
+#define __SYSDEP_LOCKS_H__
+
+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;
+}
+
+inline static void
+release_set (volatile obj_addr_t *addr, obj_addr_t new_val)
+{
+  __asm__ __volatile__ (" " : : : "memory");
+  *(addr) = new_val;
+}
+
+inline static bool
+compare_and_swap_release (volatile obj_addr_t *addr, obj_addr_t old,
+			  obj_addr_t new_val)
+{
+  return compare_and_swap (addr, old, new_val);
+}
+
+#endif /* ! __SYSDEP_LOCKS_H__ */