ftl/FTLRegisterAtOffset.h

   1 /*
   2  * Copyright (C) 2013, 2014 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 FTLRegisterAtOffset_h
  27 #define FTLRegisterAtOffset_h
  28
  29 #if ENABLE(FTL_JIT)
  30
  31 #include "Reg.h"
  32 #include <wtf/PrintStream.h>
  33
  34 namespace JSC { namespace FTL {
  35
  36 class RegisterAtOffset {
  37 public:
  38     RegisterAtOffset()
  39         : m_offset(0)
  40     {
  41     }
  42
  43     RegisterAtOffset(Reg reg, ptrdiff_t offset)
  44         : m_reg(reg)
  45         , m_offset(offset)
  46     {
  47     }
  48
  49     bool operator!() const { return !m_reg; }
  50
  51     Reg reg() const { return m_reg; }
  52     ptrdiff_t offset() const { return m_offset; }
  53
  54     bool operator==(const RegisterAtOffset& other) const
  55     {
  56         return reg() == other.reg() && offset() == other.offset();
  57     }
  58
  59     bool operator<(const RegisterAtOffset& other) const
  60     {
  61         if (reg() != other.reg())
  62             return reg() < other.reg();
  63         return offset() < other.offset();
  64     }
  65
  66     static Reg getReg(RegisterAtOffset* value) { return value->reg(); }
  67
  68     void dump(PrintStream& out) const;
  69
  70 private:
  71     Reg m_reg;
  72     ptrdiff_t m_offset;
  73 };
  74
  75 } } // namespace JSC::FTL
  76
  77 #endif // ENABLE(FTL_JIT)
  78
  79 #endif // FTLRegisterAtOffset_h
  80