macro-assembler.h revision 3ef787dbeca8a5fb1086949cda830dccee07bfbd 
1// Copyright 2012 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
10//       disclaimer in the documentation and/or other materials provided
11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28#ifndef V8_MACRO_ASSEMBLER_H_
29#define V8_MACRO_ASSEMBLER_H_
30
31
32// Helper types to make boolean flag easier to read at call-site.
33enum InvokeFlag {
34  CALL_FUNCTION,
35  JUMP_FUNCTION
36};
37
38
39// Invalid depth in prototype chain.
40const int kInvalidProtoDepth = -1;
41
42#if V8_TARGET_ARCH_IA32
43#include "assembler.h"
44#include "ia32/assembler-ia32.h"
45#include "ia32/assembler-ia32-inl.h"
46#include "code.h"  // must be after assembler_*.h
47#include "ia32/macro-assembler-ia32.h"
48#elif V8_TARGET_ARCH_X64
49#include "assembler.h"
50#include "x64/assembler-x64.h"
51#include "x64/assembler-x64-inl.h"
52#include "code.h"  // must be after assembler_*.h
53#include "x64/macro-assembler-x64.h"
54#elif V8_TARGET_ARCH_ARM
55#include "arm/constants-arm.h"
56#include "assembler.h"
57#include "arm/assembler-arm.h"
58#include "arm/assembler-arm-inl.h"
59#include "code.h"  // must be after assembler_*.h
60#include "arm/macro-assembler-arm.h"
61#elif V8_TARGET_ARCH_MIPS
62#include "mips/constants-mips.h"
63#include "assembler.h"
64#include "mips/assembler-mips.h"
65#include "mips/assembler-mips-inl.h"
66#include "code.h"  // must be after assembler_*.h
67#include "mips/macro-assembler-mips.h"
68#else
69#error Unsupported target architecture.
70#endif
71
72namespace v8 {
73namespace internal {
74
75class FrameScope {
76 public:
77  explicit FrameScope(MacroAssembler* masm, StackFrame::Type type)
78      : masm_(masm), type_(type), old_has_frame_(masm->has_frame()) {
79    masm->set_has_frame(true);
80    if (type != StackFrame::MANUAL && type_ != StackFrame::NONE) {
81      masm->EnterFrame(type);
82    }
83  }
84
85  ~FrameScope() {
86    if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
87      masm_->LeaveFrame(type_);
88    }
89    masm_->set_has_frame(old_has_frame_);
90  }
91
92  // Normally we generate the leave-frame code when this object goes
93  // out of scope.  Sometimes we may need to generate the code somewhere else
94  // in addition.  Calling this will achieve that, but the object stays in
95  // scope, the MacroAssembler is still marked as being in a frame scope, and
96  // the code will be generated again when it goes out of scope.
97  void GenerateLeaveFrame() {
98    masm_->LeaveFrame(type_);
99  }
100
101 private:
102  MacroAssembler* masm_;
103  StackFrame::Type type_;
104  bool old_has_frame_;
105};
106
107
108class AllowExternalCallThatCantCauseGC: public FrameScope {
109 public:
110  explicit AllowExternalCallThatCantCauseGC(MacroAssembler* masm)
111      : FrameScope(masm, StackFrame::NONE) { }
112};
113
114
115class NoCurrentFrameScope {
116 public:
117  explicit NoCurrentFrameScope(MacroAssembler* masm)
118      : masm_(masm), saved_(masm->has_frame()) {
119    masm->set_has_frame(false);
120  }
121
122  ~NoCurrentFrameScope() {
123    masm_->set_has_frame(saved_);
124  }
125
126 private:
127  MacroAssembler* masm_;
128  bool saved_;
129};
130
131
132// Support for "structured" code comments.
133#ifdef DEBUG
134
135class Comment {
136 public:
137  Comment(MacroAssembler* masm, const char* msg);
138  ~Comment();
139
140 private:
141  MacroAssembler* masm_;
142  const char* msg_;
143};
144
145#else
146
147class Comment {
148 public:
149  Comment(MacroAssembler*, const char*)  {}
150};
151
152#endif  // DEBUG
153
154} }  // namespace v8::internal
155
156#endif  // V8_MACRO_ASSEMBLER_H_
157