| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | |
| 2 // for details. All rights reserved. Use of this source code is governed by a | |
| 3 // BSD-style license that can be found in the LICENSE file. | |
| 4 // The class 'AssemblerMacros' contains assembler instruction groups that | |
| 5 // are used in Dart. | |
| 6 | |
| 7 #ifndef VM_ASSEMBLER_MACROS_IA32_H_ | |
| 8 #define VM_ASSEMBLER_MACROS_IA32_H_ | |
| 9 | |
| 10 #ifndef VM_ASSEMBLER_MACROS_H_ | |
| 11 #error Do not include assembler_macros_ia32.h directly; use assembler_macros.h. | |
| 12 #endif | |
| 13 | |
| 14 #include "vm/allocation.h" | |
| 15 #include "vm/constants_ia32.h" | |
| 16 | |
| 17 namespace dart { | |
| 18 | |
| 19 // Forward declarations. | |
| 20 class Assembler; | |
| 21 class Class; | |
| 22 class Label; | |
| 23 | |
| 24 class AssemblerMacros : public AllStatic { | |
| 25 public: | |
| 26 // Inlined allocation of an instance of class 'cls', code has no runtime | |
| 27 // calls. Jump to 'failure' if the instance cannot be allocated here. | |
| 28 // Allocated instance is returned in 'instance_reg'. | |
| 29 // Only the tags field of the object is initialized. | |
| 30 static void TryAllocate(Assembler* assembler, | |
| 31 const Class& cls, | |
| 32 Label* failure, | |
| 33 bool near_jump, | |
| 34 Register instance_reg); | |
| 35 | |
| 36 // Set up a dart frame on entry with a frame pointer and PC information to | |
| 37 // enable easy access to the RawInstruction object of code corresponding | |
| 38 // to this frame. | |
| 39 // The dart frame layout is as follows: | |
| 40 // .... | |
| 41 // ret PC | |
| 42 // saved EBP <=== EBP | |
| 43 // pc (used to derive the RawInstruction Object of the dart code) | |
| 44 // locals space <=== ESP | |
| 45 // ..... | |
| 46 // This code sets this up with the sequence: | |
| 47 // pushl ebp | |
| 48 // movl ebp, esp | |
| 49 // call L | |
| 50 // L: <code to adjust saved pc if there is any intrinsification code> | |
| 51 // ..... | |
| 52 static void EnterDartFrame(Assembler* assembler, intptr_t frame_size); | |
| 53 | |
| 54 // Set up a stub frame so that the stack traversal code can easily identify | |
| 55 // a stub frame. | |
| 56 // The stub frame layout is as follows: | |
| 57 // .... | |
| 58 // ret PC | |
| 59 // saved EBP | |
| 60 // 0 (used to indicate frame is a stub frame) | |
| 61 // ..... | |
| 62 // This code sets this up with the sequence: | |
| 63 // pushl ebp | |
| 64 // movl ebp, esp | |
| 65 // pushl immediate(0) | |
| 66 // ..... | |
| 67 static void EnterStubFrame(Assembler* assembler); | |
| 68 | |
| 69 // Instruction pattern from entrypoint is used in dart frame prologs | |
| 70 // to set up the frame and save a PC which can be used to figure out the | |
| 71 // RawInstruction object corresponding to the code running in the frame. | |
| 72 // entrypoint: | |
| 73 // pushl ebp (size is 1 byte) | |
| 74 // movl ebp, esp (size is 2 bytes) | |
| 75 // call L (size is 5 bytes) | |
| 76 // L: | |
| 77 static const intptr_t kOffsetOfSavedPCfromEntrypoint = 8; | |
| 78 }; | |
| 79 | |
| 80 } // namespace dart. | |
| 81 | |
| 82 #endif // VM_ASSEMBLER_MACROS_IA32_H_ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 12398029:
Remove the barely used macro assemblers after merging their contents to the base (Closed)
Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/