Rename A64 port to ARM64 port

src/a64/decoder-a64.h

-// 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_