llint/LLIntData.h

   1 /*
   2  * Copyright (C) 2011 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef LLIntData_h
  27 #define LLIntData_h
  28
  29 #include "JSCJSValue.h"
  30 #include "Opcode.h"
  31
  32 namespace JSC {
  33
  34 class VM;
  35 struct Instruction;
  36
  37 #if !ENABLE(JIT)
  38 typedef OpcodeID LLIntCode;
  39 #else
  40 typedef void (*LLIntCode)();
  41 #endif
  42
  43 namespace LLInt {
  44
  45 class Data {
  46 public:
  47     static void performAssertions(VM&);
  48
  49 private:
  50     static Instruction* s_exceptionInstructions;
  51     static Opcode s_opcodeMap[numOpcodeIDs];
  52
  53     friend void initialize();
  54
  55     friend Instruction* exceptionInstructions();
  56     friend Opcode* opcodeMap();
  57     friend Opcode getOpcode(OpcodeID);
  58     friend void* getCodePtr(OpcodeID);
  59 };
  60
  61 void initialize();
  62
  63 inline Instruction* exceptionInstructions()
  64 {
  65     return Data::s_exceptionInstructions;
  66 }
  67
  68 inline Opcode* opcodeMap()
  69 {
  70     return Data::s_opcodeMap;
  71 }
  72
  73 inline Opcode getOpcode(OpcodeID id)
  74 {
  75 #if ENABLE(COMPUTED_GOTO_OPCODES)
  76     return Data::s_opcodeMap[id];
  77 #else
  78     return static_cast<Opcode>(id);
  79 #endif
  80 }
  81
  82 ALWAYS_INLINE void* getCodePtr(OpcodeID id)
  83 {
  84     return reinterpret_cast<void*>(getOpcode(id));
  85 }
  86
  87 #if ENABLE(JIT)
  88 ALWAYS_INLINE LLIntCode getCodeFunctionPtr(OpcodeID codeId)
  89 {
  90     return reinterpret_cast<LLIntCode>(getCodePtr(codeId));
  91 }
  92 #endif
  93
  94 ALWAYS_INLINE void* getCodePtr(JSC::EncodedJSValue glueHelper())
  95 {
  96     return bitwise_cast<void*>(glueHelper);
  97 }
  98
  99
 100 } } // namespace JSC::LLInt
 101
 102 #endif // LLIntData_h
 103