--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/asm/sparc/ReadDecoder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,48 @@
+/*
+ * Copyright 2002 Sun Microsystems, Inc.  All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.asm.sparc;
+
+import sun.jvm.hotspot.asm.*;
+
+class ReadDecoder extends ReadWriteDecoder {
+    ReadDecoder(int specialRegNum) {
+        super(specialRegNum);
+    }
+
+    Instruction decodeReadWrite(int instruction, SPARCInstructionFactory factory,
+                                int rs1Num, int rdNum) {
+        Instruction instr = null;
+        int specialReg = specialRegNum;
+        if (rs1Num == 0)
+            specialReg = SPARCSpecialRegisters.Y;
+        if (rs1Num == 15 && rdNum == 0) {
+            instr = factory.newStbarInstruction();
+        } else {
+            instr = factory.newReadInstruction(specialReg, rs1Num,
+                                  SPARCRegisters.getRegister(rdNum));
+        }
+        return instr;
+    }
+}