Index: runtime/vm/assembler_dbc.h |
diff --git a/runtime/vm/assembler_dbc.h b/runtime/vm/assembler_dbc.h |
new file mode 100644 |
index 0000000000000000000000000000000000000000..590dd5ca012d645496b03788cbd25424a6d1a98c |
--- /dev/null |
+++ b/runtime/vm/assembler_dbc.h |
@@ -0,0 +1,197 @@ |
+// Copyright (c) 2016, the Dart project authors. Please see the AUTHORS file |
+// for details. All rights reserved. Use of this source code is governed by a |
+// BSD-style license that can be found in the LICENSE file. |
+ |
+#ifndef VM_ASSEMBLER_DBC_H_ |
+#define VM_ASSEMBLER_DBC_H_ |
+ |
+#ifndef VM_ASSEMBLER_H_ |
+#error Do not include assembler_dbc.h directly; use assembler.h instead. |
+#endif |
+ |
+#include "platform/assert.h" |
+#include "platform/utils.h" |
+#include "vm/constants_dbc.h" |
+#include "vm/cpu.h" |
+#include "vm/hash_map.h" |
+#include "vm/object.h" |
+#include "vm/simulator.h" |
+ |
+namespace dart { |
+ |
+ |
+// Dummy declaration to make things compile. |
+class Address : public ValueObject { |
+ private: |
+ Address(); |
+}; |
+ |
+ |
+class Label : public ValueObject { |
+ public: |
+ Label() : position_(0) { } |
+ |
+ ~Label() { |
+ // Assert if label is being destroyed with unresolved branches pending. |
+ ASSERT(!IsLinked()); |
+ } |
+ |
+ // Returns the position for bound and linked labels. Cannot be used |
+ // for unused labels. |
+ intptr_t Position() const { |
+ ASSERT(!IsUnused()); |
+ return IsBound() ? -position_ - kWordSize : position_ - kWordSize; |
+ } |
+ |
+ bool IsBound() const { return position_ < 0; } |
+ bool IsUnused() const { return position_ == 0; } |
+ bool IsLinked() const { return position_ > 0; } |
+ |
+ private: |
+ intptr_t position_; |
+ |
+ void Reinitialize() { |
+ position_ = 0; |
+ } |
+ |
+ void BindTo(intptr_t position) { |
+ ASSERT(!IsBound()); |
+ position_ = -position - kWordSize; |
+ ASSERT(IsBound()); |
+ } |
+ |
+ void LinkTo(intptr_t position) { |
+ ASSERT(!IsBound()); |
+ position_ = position + kWordSize; |
+ ASSERT(IsLinked()); |
+ } |
+ |
+ friend class Assembler; |
+ DISALLOW_COPY_AND_ASSIGN(Label); |
+}; |
+ |
+ |
+class Assembler : public ValueObject { |
+ public: |
+ explicit Assembler(bool use_far_branches = false) |
+ : buffer_(), |
+ comments_() { |
+ } |
+ |
+ ~Assembler() { } |
+ |
+ void Bind(Label* label); |
+ void Jump(Label* label); |
+ |
+ // Misc. functionality |
+ intptr_t CodeSize() const { return buffer_.Size(); } |
+ intptr_t prologue_offset() const { return 0; } |
+ |
+ // Count the fixups that produce a pointer offset, without processing |
+ // the fixups. |
+ intptr_t CountPointerOffsets() const { return 0; } |
+ |
+ const ZoneGrowableArray<intptr_t>& GetPointerOffsets() const { |
+ ASSERT(buffer_.pointer_offsets().length() == 0); // No pointers in code. |
+ return buffer_.pointer_offsets(); |
+ } |
+ |
+ ObjectPoolWrapper& object_pool_wrapper() { return object_pool_wrapper_; } |
+ |
+ RawObjectPool* MakeObjectPool() { |
+ return object_pool_wrapper_.MakeObjectPool(); |
+ } |
+ |
+ void FinalizeInstructions(const MemoryRegion& region) { |
+ buffer_.FinalizeInstructions(region); |
+ } |
+ |
+ // Debugging and bringup support. |
+ void Stop(const char* message); |
+ void Unimplemented(const char* message); |
+ void Untested(const char* message); |
+ void Unreachable(const char* message); |
+ |
+ static void InitializeMemoryWithBreakpoints(uword data, intptr_t length); |
+ |
+ void Comment(const char* format, ...) PRINTF_ATTRIBUTE(2, 3); |
+ static bool EmittingComments(); |
+ |
+ const Code::Comments& GetCodeComments() const; |
+ |
+ static const char* RegisterName(Register reg); |
+ |
+ static const char* FpuRegisterName(FpuRegister reg) { |
+ return "?"; |
+ } |
+ |
+ static uword GetBreakInstructionFiller() { |
+ return Bytecode::kTrap; |
+ } |
+ |
+ static bool IsSafe(const Object& value) { return true; } |
+ static bool IsSafeSmi(const Object& value) { return false; } |
+ |
+ // Bytecodes. |
+ |
+#define DECLARE_EMIT(Name, Signature, Fmt0, Fmt1, Fmt2) \ |
+ void Name(PARAMS_##Signature); |
+ |
+#define PARAMS_0 |
+#define PARAMS_A_D uintptr_t ra, uintptr_t rd |
+#define PARAMS_D uintptr_t rd |
+#define PARAMS_A_B_C uintptr_t ra, uintptr_t rb, uintptr_t rc |
+#define PARAMS_A uintptr_t ra |
+#define PARAMS_X intptr_t x |
+#define PARAMS_T intptr_t x |
+#define PARAMS_A_X uintptr_t ra, intptr_t x |
+ |
+ |
+ BYTECODES_LIST(DECLARE_EMIT) |
+ |
+#undef PARAMS_0 |
+#undef PARAMS_A_D |
+#undef PARAMS_D |
+#undef PARAMS_A_B_C |
+#undef PARAMS_A |
+#undef PARAMS_X |
+#undef PARAMS_T |
+#undef PARAMS_A_X |
+#undef DECLARE_EMIT |
+ |
+ void Emit(int32_t value); |
+ |
+ void PushConstant(const Object& obj); |
+ void LoadConstant(uintptr_t ra, const Object& obj); |
+ |
+ intptr_t AddConstant(const Object& obj); |
+ |
+ private: |
+ AssemblerBuffer buffer_; // Contains position independent code. |
+ ObjectPoolWrapper object_pool_wrapper_; |
+ |
+ class CodeComment : public ZoneAllocated { |
+ public: |
+ CodeComment(intptr_t pc_offset, const String& comment) |
+ : pc_offset_(pc_offset), comment_(comment) { } |
+ |
+ intptr_t pc_offset() const { return pc_offset_; } |
+ const String& comment() const { return comment_; } |
+ |
+ private: |
+ intptr_t pc_offset_; |
+ const String& comment_; |
+ |
+ DISALLOW_COPY_AND_ASSIGN(CodeComment); |
+ }; |
+ |
+ GrowableArray<CodeComment*> comments_; |
+ |
+ DISALLOW_ALLOCATION(); |
+ DISALLOW_COPY_AND_ASSIGN(Assembler); |
+}; |
+ |
+ |
+} // namespace dart |
+ |
+#endif // VM_ASSEMBLER_DBC_H_ |