--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/asm/sparc/MemoryInstructionDecoder.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,86 @@
+/*
+ * 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.*;
+
+abstract class MemoryInstructionDecoder extends InstructionDecoder {
+    final int    op3;
+    final String name;
+    final int    dataType;
+
+    SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, SPARCRegister rs2) {
+        return new SPARCRegisterIndirectAddress(rs1, rs2);
+    }
+
+    SPARCRegisterIndirectAddress newRegisterIndirectAddress(SPARCRegister rs1, int offset) {
+        return new SPARCRegisterIndirectAddress(rs1, offset);
+    }
+
+    static void setAddressSpace(int instruction, SPARCRegisterIndirectAddress addr) {
+        int asi = (instruction & ASI_MASK) >>> ASI_START_BIT;
+        addr.setAddressSpace(asi);
+    }
+
+    SPARCRegisterIndirectAddress getRegisterIndirectAddress(int instruction) {
+        SPARCRegister rs1 = SPARCRegisters.getRegister(getSourceRegister1(instruction));
+        boolean iBit = isIBitSet(instruction);
+        SPARCRegisterIndirectAddress addr = null;
+        if (iBit) {
+            int simm13 = extractSignedIntFromNBits(instruction, 13);
+            addr = newRegisterIndirectAddress(rs1,simm13);
+        } else {
+            SPARCRegister rs2 = SPARCRegisters.getRegister(getSourceRegister2(instruction));
+            addr = newRegisterIndirectAddress(rs1,rs2);
+        }
+        return addr;
+    }
+
+    MemoryInstructionDecoder(int op3, String name, int dataType) {
+        this.op3 = op3;
+        this.name = name;
+        this.dataType = dataType;
+    }
+
+    Instruction decode(int instruction, SPARCInstructionFactory factory) {
+        SPARCRegisterIndirectAddress addr = getRegisterIndirectAddress(instruction);
+        SPARCRegister rd = getDestination(instruction);
+        boolean isV9Okay = (factory instanceof SPARCV9InstructionFactory);
+        if ( (rd == null) || (! isV9Okay && rd.isV9Only()) )
+            return factory.newIllegalInstruction(instruction);
+
+        return decodeMemoryInstruction(instruction, addr, rd, factory);
+    }
+
+    SPARCRegister getDestination(int instruction) {
+        int rdNum = getDestinationRegister(instruction);
+        SPARCRegister rd = RegisterDecoder.decode(dataType, rdNum);
+        return rd;
+    }
+
+    abstract Instruction decodeMemoryInstruction(int instruction,
+                                   SPARCRegisterIndirectAddress addr,
+                                   SPARCRegister rd, SPARCInstructionFactory factory);
+}