86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_UTILS_MIPS64_CONSTANTS_MIPS64_H_
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#define ART_COMPILER_UTILS_MIPS64_CONSTANTS_MIPS64_H_
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#include <iosfwd>
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#include "arch/mips64/registers_mips64.h"
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#include "base/logging.h"
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#include "base/macros.h"
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#include "globals.h"
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namespace art {
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namespace mips64 {
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// Constants used for the decoding or encoding of the individual fields of instructions.
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enum InstructionFields {
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kOpcodeShift = 26,
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kOpcodeBits = 6,
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kRsShift = 21,
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kRsBits = 5,
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kRtShift = 16,
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kRtBits = 5,
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kRdShift = 11,
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kRdBits = 5,
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kShamtShift = 6,
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kShamtBits = 5,
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kFunctShift = 0,
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kFunctBits = 6,
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kFmtShift = 21,
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kFmtBits = 5,
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kFtShift = 16,
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kFtBits = 5,
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kFsShift = 11,
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kFsBits = 5,
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kFdShift = 6,
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kFdBits = 5,
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kBranchOffsetMask = 0x0000ffff,
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kJumpOffsetMask = 0x03ffffff,
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};
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enum ScaleFactor {
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TIMES_1 = 0,
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TIMES_2 = 1,
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TIMES_4 = 2,
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TIMES_8 = 3
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};
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class Instr {
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public:
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static const uint32_t kBreakPointInstruction = 0x0000000D;
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bool IsBreakPoint() {
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return ((*reinterpret_cast<const uint32_t*>(this)) & 0xFC00003F) == kBreakPointInstruction;
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}
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// Instructions are read out of a code stream. The only way to get a
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// reference to an instruction is to convert a pointer. There is no way
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// to allocate or create instances of class Instr.
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// Use the At(pc) function to create references to Instr.
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static Instr* At(uintptr_t pc) { return reinterpret_cast<Instr*>(pc); }
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private:
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DISALLOW_IMPLICIT_CONSTRUCTORS(Instr);
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};
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} // namespace mips64
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} // namespace art
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#endif // ART_COMPILER_UTILS_MIPS64_CONSTANTS_MIPS64_H_
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