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// Flags used for the AllocateInNewSpace functions.
40enum AllocationFlags {
41  // No special flags.
42  NO_ALLOCATION_FLAGS = 0,
43  // Return the pointer to the allocated already tagged as a heap object.
44  TAG_OBJECT = 1 << 0,
45  // The content of the result register already contains the allocation top in
46  // new space.
47  RESULT_CONTAINS_TOP = 1 << 1,
48  // Specify that the requested size of the space to allocate is specified in
49  // words instead of bytes.
50  SIZE_IN_WORDS = 1 << 2,
51  // Align the allocation to a multiple of kDoubleSize
52  DOUBLE_ALIGNMENT = 1 << 3,
53  // Directly allocate in old pointer space
54  PRETENURE_OLD_POINTER_SPACE = 1 << 4,
55  // Directly allocate in old data space
56  PRETENURE_OLD_DATA_SPACE = 1 << 5
57};
58
59
60// Invalid depth in prototype chain.
61const int kInvalidProtoDepth = -1;
62
63#if V8_TARGET_ARCH_IA32
64#include "assembler.h"
65#include "ia32/assembler-ia32.h"
66#include "ia32/assembler-ia32-inl.h"
67#include "code.h"  // must be after assembler_*.h
68#include "ia32/macro-assembler-ia32.h"
69#elif V8_TARGET_ARCH_X64
70#include "assembler.h"
71#include "x64/assembler-x64.h"
72#include "x64/assembler-x64-inl.h"
73#include "code.h"  // must be after assembler_*.h
74#include "x64/macro-assembler-x64.h"
75#elif V8_TARGET_ARCH_ARM
76#include "arm/constants-arm.h"
77#include "assembler.h"
78#include "arm/assembler-arm.h"
79#include "arm/assembler-arm-inl.h"
80#include "code.h"  // must be after assembler_*.h
81#include "arm/macro-assembler-arm.h"
82#elif V8_TARGET_ARCH_MIPS
83#include "mips/constants-mips.h"
84#include "assembler.h"
85#include "mips/assembler-mips.h"
86#include "mips/assembler-mips-inl.h"
87#include "code.h"  // must be after assembler_*.h
88#include "mips/macro-assembler-mips.h"
89#else
90#error Unsupported target architecture.
91#endif
92
93namespace v8 {
94namespace internal {
95
96class FrameScope {
97 public:
98  explicit FrameScope(MacroAssembler* masm, StackFrame::Type type)
99      : masm_(masm), type_(type), old_has_frame_(masm->has_frame()) {
100    masm->set_has_frame(true);
101    if (type != StackFrame::MANUAL && type_ != StackFrame::NONE) {
102      masm->EnterFrame(type);
103    }
104  }
105
106  ~FrameScope() {
107    if (type_ != StackFrame::MANUAL && type_ != StackFrame::NONE) {
108      masm_->LeaveFrame(type_);
109    }
110    masm_->set_has_frame(old_has_frame_);
111  }
112
113  // Normally we generate the leave-frame code when this object goes
114  // out of scope.  Sometimes we may need to generate the code somewhere else
115  // in addition.  Calling this will achieve that, but the object stays in
116  // scope, the MacroAssembler is still marked as being in a frame scope, and
117  // the code will be generated again when it goes out of scope.
118  void GenerateLeaveFrame() {
119    masm_->LeaveFrame(type_);
120  }
121
122 private:
123  MacroAssembler* masm_;
124  StackFrame::Type type_;
125  bool old_has_frame_;
126};
127
128
129class AllowExternalCallThatCantCauseGC: public FrameScope {
130 public:
131  explicit AllowExternalCallThatCantCauseGC(MacroAssembler* masm)
132      : FrameScope(masm, StackFrame::NONE) { }
133};
134
135
136class NoCurrentFrameScope {
137 public:
138  explicit NoCurrentFrameScope(MacroAssembler* masm)
139      : masm_(masm), saved_(masm->has_frame()) {
140    masm->set_has_frame(false);
141  }
142
143  ~NoCurrentFrameScope() {
144    masm_->set_has_frame(saved_);
145  }
146
147 private:
148  MacroAssembler* masm_;
149  bool saved_;
150};
151
152
153// Support for "structured" code comments.
154#ifdef DEBUG
155
156class Comment {
157 public:
158  Comment(MacroAssembler* masm, const char* msg);
159  ~Comment();
160
161 private:
162  MacroAssembler* masm_;
163  const char* msg_;
164};
165
166#else
167
168class Comment {
169 public:
170  Comment(MacroAssembler*, const char*)  {}
171};
172
173#endif  // DEBUG
174
175
176class AllocationUtils {
177 public:
178  static ExternalReference GetAllocationTopReference(
179      Isolate* isolate, AllocationFlags flags) {
180    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
181      return ExternalReference::old_pointer_space_allocation_top_address(
182          isolate);
183    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
184      return ExternalReference::old_data_space_allocation_top_address(isolate);
185    }
186    return ExternalReference::new_space_allocation_top_address(isolate);
187  }
188
189
190  static ExternalReference GetAllocationLimitReference(
191      Isolate* isolate, AllocationFlags flags) {
192    if ((flags & PRETENURE_OLD_POINTER_SPACE) != 0) {
193      return ExternalReference::old_pointer_space_allocation_limit_address(
194          isolate);
195    } else if ((flags & PRETENURE_OLD_DATA_SPACE) != 0) {
196      return ExternalReference::old_data_space_allocation_limit_address(
197          isolate);
198    }
199    return ExternalReference::new_space_allocation_limit_address(isolate);
200  }
201};
202
203
204} }  // namespace v8::internal
205
206#endif  // V8_MACRO_ASSEMBLER_H_
207