Index: src/a64/decoder-a64.h |
diff --git a/src/a64/decoder-a64.h b/src/a64/decoder-a64.h |
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-// Copyright 2013 the V8 project authors. All rights reserved. |
-// Redistribution and use in source and binary forms, with or without |
-// modification, are permitted provided that the following conditions are |
-// met: |
-// |
-// * Redistributions of source code must retain the above copyright |
-// notice, this list of conditions and the following disclaimer. |
-// * Redistributions in binary form must reproduce the above |
-// copyright notice, this list of conditions and the following |
-// disclaimer in the documentation and/or other materials provided |
-// with the distribution. |
-// * Neither the name of Google Inc. nor the names of its |
-// contributors may be used to endorse or promote products derived |
-// from this software without specific prior written permission. |
-// |
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
- |
-#ifndef V8_A64_DECODER_A64_H_ |
-#define V8_A64_DECODER_A64_H_ |
- |
-#include <list> |
- |
-#include "globals.h" |
-#include "a64/instructions-a64.h" |
- |
-namespace v8 { |
-namespace internal { |
- |
- |
-// List macro containing all visitors needed by the decoder class. |
- |
-#define VISITOR_LIST(V) \ |
- V(PCRelAddressing) \ |
- V(AddSubImmediate) \ |
- V(LogicalImmediate) \ |
- V(MoveWideImmediate) \ |
- V(Bitfield) \ |
- V(Extract) \ |
- V(UnconditionalBranch) \ |
- V(UnconditionalBranchToRegister) \ |
- V(CompareBranch) \ |
- V(TestBranch) \ |
- V(ConditionalBranch) \ |
- V(System) \ |
- V(Exception) \ |
- V(LoadStorePairPostIndex) \ |
- V(LoadStorePairOffset) \ |
- V(LoadStorePairPreIndex) \ |
- V(LoadStorePairNonTemporal) \ |
- V(LoadLiteral) \ |
- V(LoadStoreUnscaledOffset) \ |
- V(LoadStorePostIndex) \ |
- V(LoadStorePreIndex) \ |
- V(LoadStoreRegisterOffset) \ |
- V(LoadStoreUnsignedOffset) \ |
- V(LogicalShifted) \ |
- V(AddSubShifted) \ |
- V(AddSubExtended) \ |
- V(AddSubWithCarry) \ |
- V(ConditionalCompareRegister) \ |
- V(ConditionalCompareImmediate) \ |
- V(ConditionalSelect) \ |
- V(DataProcessing1Source) \ |
- V(DataProcessing2Source) \ |
- V(DataProcessing3Source) \ |
- V(FPCompare) \ |
- V(FPConditionalCompare) \ |
- V(FPConditionalSelect) \ |
- V(FPImmediate) \ |
- V(FPDataProcessing1Source) \ |
- V(FPDataProcessing2Source) \ |
- V(FPDataProcessing3Source) \ |
- V(FPIntegerConvert) \ |
- V(FPFixedPointConvert) \ |
- V(Unallocated) \ |
- V(Unimplemented) |
- |
-// The Visitor interface. Disassembler and simulator (and other tools) |
-// must provide implementations for all of these functions. |
-class DecoderVisitor { |
- public: |
- virtual ~DecoderVisitor() {} |
- |
- #define DECLARE(A) virtual void Visit##A(Instruction* instr) = 0; |
- VISITOR_LIST(DECLARE) |
- #undef DECLARE |
-}; |
- |
- |
-// A visitor that dispatches to a list of visitors. |
-class DispatchingDecoderVisitor : public DecoderVisitor { |
- public: |
- DispatchingDecoderVisitor() {} |
- virtual ~DispatchingDecoderVisitor() {} |
- |
- // Register a new visitor class with the decoder. |
- // Decode() will call the corresponding visitor method from all registered |
- // visitor classes when decoding reaches the leaf node of the instruction |
- // decode tree. |
- // Visitors are called in the order. |
- // A visitor can only be registered once. |
- // Registering an already registered visitor will update its position. |
- // |
- // d.AppendVisitor(V1); |
- // d.AppendVisitor(V2); |
- // d.PrependVisitor(V2); // Move V2 at the start of the list. |
- // d.InsertVisitorBefore(V3, V2); |
- // d.AppendVisitor(V4); |
- // d.AppendVisitor(V4); // No effect. |
- // |
- // d.Decode(i); |
- // |
- // will call in order visitor methods in V3, V2, V1, V4. |
- void AppendVisitor(DecoderVisitor* visitor); |
- void PrependVisitor(DecoderVisitor* visitor); |
- void InsertVisitorBefore(DecoderVisitor* new_visitor, |
- DecoderVisitor* registered_visitor); |
- void InsertVisitorAfter(DecoderVisitor* new_visitor, |
- DecoderVisitor* registered_visitor); |
- |
- // Remove a previously registered visitor class from the list of visitors |
- // stored by the decoder. |
- void RemoveVisitor(DecoderVisitor* visitor); |
- |
- #define DECLARE(A) void Visit##A(Instruction* instr); |
- VISITOR_LIST(DECLARE) |
- #undef DECLARE |
- |
- private: |
- // Visitors are registered in a list. |
- std::list<DecoderVisitor*> visitors_; |
-}; |
- |
- |
-template<typename V> |
-class Decoder : public V { |
- public: |
- Decoder() {} |
- virtual ~Decoder() {} |
- |
- // Top-level instruction decoder function. Decodes an instruction and calls |
- // the visitor functions registered with the Decoder class. |
- virtual void Decode(Instruction *instr); |
- |
- private: |
- // Decode the PC relative addressing instruction, and call the corresponding |
- // visitors. |
- // On entry, instruction bits 27:24 = 0x0. |
- void DecodePCRelAddressing(Instruction* instr); |
- |
- // Decode the add/subtract immediate instruction, and call the corresponding |
- // visitors. |
- // On entry, instruction bits 27:24 = 0x1. |
- void DecodeAddSubImmediate(Instruction* instr); |
- |
- // Decode the branch, system command, and exception generation parts of |
- // the instruction tree, and call the corresponding visitors. |
- // On entry, instruction bits 27:24 = {0x4, 0x5, 0x6, 0x7}. |
- void DecodeBranchSystemException(Instruction* instr); |
- |
- // Decode the load and store parts of the instruction tree, and call |
- // the corresponding visitors. |
- // On entry, instruction bits 27:24 = {0x8, 0x9, 0xC, 0xD}. |
- void DecodeLoadStore(Instruction* instr); |
- |
- // Decode the logical immediate and move wide immediate parts of the |
- // instruction tree, and call the corresponding visitors. |
- // On entry, instruction bits 27:24 = 0x2. |
- void DecodeLogical(Instruction* instr); |
- |
- // Decode the bitfield and extraction parts of the instruction tree, |
- // and call the corresponding visitors. |
- // On entry, instruction bits 27:24 = 0x3. |
- void DecodeBitfieldExtract(Instruction* instr); |
- |
- // Decode the data processing parts of the instruction tree, and call the |
- // corresponding visitors. |
- // On entry, instruction bits 27:24 = {0x1, 0xA, 0xB}. |
- void DecodeDataProcessing(Instruction* instr); |
- |
- // Decode the floating point parts of the instruction tree, and call the |
- // corresponding visitors. |
- // On entry, instruction bits 27:24 = {0xE, 0xF}. |
- void DecodeFP(Instruction* instr); |
- |
- // Decode the Advanced SIMD (NEON) load/store part of the instruction tree, |
- // and call the corresponding visitors. |
- // On entry, instruction bits 29:25 = 0x6. |
- void DecodeAdvSIMDLoadStore(Instruction* instr); |
- |
- // Decode the Advanced SIMD (NEON) data processing part of the instruction |
- // tree, and call the corresponding visitors. |
- // On entry, instruction bits 27:25 = 0x7. |
- void DecodeAdvSIMDDataProcessing(Instruction* instr); |
-}; |
- |
- |
-} } // namespace v8::internal |
- |
-#endif // V8_A64_DECODER_A64_H_ |