root/core/WordcodeTranslator.h

INCLUDED FROM

/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is [Open Source Virtual Machine.].
 *
 * The Initial Developer of the Original Code is
 * Adobe System Incorporated.
 * Portions created by the Initial Developer are Copyright (C) 2004-2006
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Adobe AS3 Team
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#include "avmplus.h"

namespace avmplus
{
#ifdef AVMPLUS_WORD_CODE

#  ifdef AVMPLUS_DIRECT_THREADED
#    define NEW_OPCODE(n)         ((uintptr_t)opcode_labels[n])
#  else
#    ifdef _DEBUG
#      define NEW_OPCODE(opcode)  ((opcode) | ((opcode) << 16))  // aids debugging
#    else
#      define NEW_OPCODE(opcode)  opcode
#    endif
#  endif
        
        // Abstract Base class
    class WordcodeTranslator : public CodeWriter
        {
        public:
                WordcodeTranslator() { };
                virtual ~WordcodeTranslator() { };
                
                // In all cases below, pc points to the opcode.
                
                virtual void computeExceptionFixups() = 0;

                // Call before every instruction to handle exception range translation and
                // fix up branches to this address
                virtual void fixExceptionsAndLabels(const uint8_t *pc) = 0;
                
                // Paste up the translated code and install it in info
                virtual uint32 epilogue(uintptr_t** code_result = NULL) = 0;
                
                // Handle specific instructions or instruction classes
                virtual void emitOp0(const uint8_t *pc, WordOpcode opcode) = 0;
                void emitOp0(WordOpcode opcode) { emitOp0(NULL, opcode); }
                virtual void emitOp1(const uint8_t *pc, WordOpcode opcode) = 0;
                virtual void emitOp1(WordOpcode opcode, uint32 operand) = 0;
                virtual void emitOp2(const uint8_t *pc, WordOpcode opcode) = 0;
                virtual void emitOp2(WordOpcode opcode, uint32 op1, uint32 op2) = 0;
#ifdef DEBUGGER
                virtual void emitDebug(const uint8_t *pc) = 0;
#endif
                virtual void emitRelativeJump(const uint8_t *pc, WordOpcode opcode) = 0;
                virtual void emitLookupswitch(const uint8_t *pc) = 0;
                virtual void emitLabel(const uint8_t *pc) = 0;
                virtual void emitPushbyte(const uint8_t *pc) = 0;
                virtual void emitPushshort(const uint8_t *pc) = 0;
                virtual void emitPushint(const uint8_t *pc) = 0;
                virtual void emitPushuint(const uint8_t *pc) = 0;
                virtual void emitGetscopeobject(const uint8_t *pc) = 0;

                // In this case, new_pc is the pc being jumped to
                virtual void emitAbsJump(const uint8_t *new_pc) = 0;

#ifdef SUPERWORD_PROFILING
                static void swprofStart();
                static void swprofStop();
                static void swprofCode(const uint32_t* start, const uint32_t* limit);
                static void swprofPC(const uint32_t* pc);
#endif
        };

#endif // AVMPUS_WORD_CODE
}