core/WordcodeTranslator.h

   1 /* -*- Mode: C++; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 4 -*- */
   2 /* vi: set ts=4 sw=4 expandtab: (add to ~/.vimrc: set modeline modelines=5) */
   3 /* ***** BEGIN LICENSE BLOCK *****
   4  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   5  *
   6  * The contents of this file are subject to the Mozilla Public License Version
   7  * 1.1 (the "License"); you may not use this file except in compliance with
   8  * the License. You may obtain a copy of the License at
   9  * http://www.mozilla.org/MPL/
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  11  * Software distributed under the License is distributed on an "AS IS" basis,
  12  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  13  * for the specific language governing rights and limitations under the
  14  * License.
  15  *
  16  * The Original Code is [Open Source Virtual Machine.].
  17  *
  18  * The Initial Developer of the Original Code is
  19  * Adobe System Incorporated.
  20  * Portions created by the Initial Developer are Copyright (C) 2004-2006
  21  * the Initial Developer. All Rights Reserved.
  22  *
  23  * Contributor(s):
  24  *   Adobe AS3 Team
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  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either the GNU General Public License Version 2 or later (the "GPL"), or
  28  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #include "avmplus.h"
  41
  42 namespace avmplus
  43 {
  44 #ifdef VMCFG_WORDCODE
  45
  46 #  ifdef VMCFG_DIRECT_THREADED
  47 #    define NEW_OPCODE(n)         ((uintptr_t)opcode_labels[n])
  48 #  else
  49 #    ifdef _DEBUG
  50 #      define NEW_OPCODE(opcode)  ((opcode) | ((opcode) << 16))  // aids debugging
  51 #    else
  52 #      define NEW_OPCODE(opcode)  opcode
  53 #    endif
  54 #  endif
  55
  56     // Abstract Base class
  57     class WordcodeTranslator : public CodeWriter
  58     {
  59     public:
  60         WordcodeTranslator() { };
  61         virtual ~WordcodeTranslator() { };
  62
  63         // In all cases below, pc points to the opcode.
  64
  65         virtual void computeExceptionFixups() = 0;
  66
  67         // Call before every instruction to handle exception range translation and
  68         // fix up branches to this address
  69         virtual void fixExceptionsAndLabels(const uint8_t *pc) = 0;
  70
  71         // Paste up the translated code and install it in info
  72         virtual uint32_t epilogue(uintptr_t** code_result = NULL) = 0;
  73
  74         // Handle specific instructions or instruction classes
  75         virtual void emitOp0(const uint8_t *pc, WordOpcode opcode) = 0;
  76         void emitOp0(WordOpcode opcode) { emitOp0(NULL, opcode); }
  77         virtual void emitOp1(const uint8_t *pc, WordOpcode opcode) = 0;
  78         virtual void emitOp1(WordOpcode opcode, uint32_t operand) = 0;
  79         virtual void emitOp2(const uint8_t *pc, WordOpcode opcode) = 0;
  80         virtual void emitOp2(WordOpcode opcode, uint32_t op1, uint32_t op2) = 0;
  81 #ifdef DEBUGGER
  82         virtual void emitDebug(const uint8_t *pc) = 0;
  83 #endif
  84         virtual void emitRelativeJump(const uint8_t *pc, WordOpcode opcode) = 0;
  85         virtual void emitLookupswitch(const uint8_t *pc) = 0;
  86         virtual void emitLabel(const uint8_t *pc) = 0;
  87         virtual void emitPushbyte(const uint8_t *pc) = 0;
  88         virtual void emitPushshort(const uint8_t *pc) = 0;
  89         virtual void emitPushint(const uint8_t *pc) = 0;
  90         virtual void emitPushuint(const uint8_t *pc) = 0;
  91         virtual void emitGetscopeobject(const uint8_t *pc) = 0;
  92
  93 #ifdef SUPERWORD_PROFILING
  94         static void swprofStart();
  95         static void swprofStop();
  96         static void swprofCode(const uint32_t* start, const uint32_t* limit);
  97         static void swprofPC(const uint32_t* pc);
  98 #endif
  99     };
 100
 101 #endif // AVMPUS_WORD_CODE
 102 }