ftl/FTLExitArgument.h

   1 /*
   2  * Copyright (C) 2013 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 FTLExitArgument_h
  27 #define FTLExitArgument_h
  28
  29 #if ENABLE(FTL_JIT)
  30
  31 #include "FTLValueFormat.h"
  32 #include <wtf/PrintStream.h>
  33
  34 namespace JSC { namespace FTL {
  35
  36 struct ExitArgumentRepresentation {
  37     ValueFormat format;
  38     unsigned argument;
  39 };
  40
  41 class ExitArgument {
  42 public:
  43     ExitArgument()
  44     {
  45         m_representation.format = InvalidValueFormat;
  46     }
  47
  48     ExitArgument(ValueFormat format, unsigned argument)
  49     {
  50         m_representation.format = format;
  51         m_representation.argument = argument;
  52     }
  53
  54     explicit ExitArgument(ExitArgumentRepresentation representation)
  55     {
  56         m_representation = representation;
  57     }
  58
  59     bool operator!() const { return m_representation.format == InvalidValueFormat; }
  60
  61     ValueFormat format() const
  62     {
  63         ASSERT(*this);
  64         return m_representation.format;
  65     }
  66
  67     unsigned argument() const
  68     {
  69         ASSERT(*this);
  70         return m_representation.argument;
  71     }
  72
  73     ExitArgument withFormat(ValueFormat format)
  74     {
  75         return ExitArgument(format, argument());
  76     }
  77
  78     ExitArgumentRepresentation representation() const { return m_representation; }
  79
  80     void dump(PrintStream&) const;
  81
  82 private:
  83     ExitArgumentRepresentation m_representation;
  84 };
  85
  86 } } // namespace JSC::FTL
  87
  88 #endif // ENABLE(FTL_JIT)
  89
  90 #endif // FTLExitArgument_h
  91