compiler/dex/quick/arm/codegen_arm.h

/*
 * Copyright (C) 2011 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef ART_COMPILER_DEX_QUICK_ARM_CODEGEN_ARM_H_
#define ART_COMPILER_DEX_QUICK_ARM_CODEGEN_ARM_H_

#include "dex/compiler_internals.h"

namespace art {

class ArmMir2Lir : public Mir2Lir {
  public:
    ArmMir2Lir(CompilationUnit* cu, MIRGraph* mir_graph, ArenaAllocator* arena);

    // Required for target - codegen helpers.
    bool SmallLiteralDivRem(Instruction::Code dalvik_opcode, bool is_div, RegLocation rl_src,
                                    RegLocation rl_dest, int lit);
    int LoadHelper(ThreadOffset offset);
    LIR* LoadBaseDisp(int rBase, int displacement, int r_dest, OpSize size, int s_reg);
    LIR* LoadBaseDispWide(int rBase, int displacement, int r_dest_lo, int r_dest_hi,
                          int s_reg);
    LIR* LoadBaseIndexed(int rBase, int r_index, int r_dest, int scale, OpSize size);
    LIR* LoadBaseIndexedDisp(int rBase, int r_index, int scale, int displacement,
                             int r_dest, int r_dest_hi, OpSize size, int s_reg);
    LIR* LoadConstantNoClobber(int r_dest, int value);
    LIR* LoadConstantWide(int r_dest_lo, int r_dest_hi, int64_t value);
    LIR* StoreBaseDisp(int rBase, int displacement, int r_src, OpSize size);
    LIR* StoreBaseDispWide(int rBase, int displacement, int r_src_lo, int r_src_hi);
    LIR* StoreBaseIndexed(int rBase, int r_index, int r_src, int scale, OpSize size);
    LIR* StoreBaseIndexedDisp(int rBase, int r_index, int scale, int displacement,
                              int r_src, int r_src_hi, OpSize size, int s_reg);
    void MarkGCCard(int val_reg, int tgt_addr_reg);

    // Required for target - register utilities.
    bool IsFpReg(int reg);
    bool SameRegType(int reg1, int reg2);
    int AllocTypedTemp(bool fp_hint, int reg_class);
    int AllocTypedTempPair(bool fp_hint, int reg_class);
    int S2d(int low_reg, int high_reg);
    int TargetReg(SpecialTargetRegister reg);
    RegLocation GetReturnAlt();
    RegLocation GetReturnWideAlt();
    RegLocation LocCReturn();
    RegLocation LocCReturnDouble();
    RegLocation LocCReturnFloat();
    RegLocation LocCReturnWide();
    uint32_t FpRegMask();
    uint64_t GetRegMaskCommon(int reg);
    void AdjustSpillMask();
    void ClobberCallerSave();
    void FlushReg(int reg);
    void FlushRegWide(int reg1, int reg2);
    void FreeCallTemps();
    void FreeRegLocTemps(RegLocation rl_keep, RegLocation rl_free);
    void LockCallTemps();
    void MarkPreservedSingle(int v_reg, int reg);
    void CompilerInitializeRegAlloc();

    // Required for target - miscellaneous.
    void AssembleLIR();
    uint32_t EncodeRange(LIR* head_lir, LIR* tail_lir, uint32_t starting_offset);
    int AssignInsnOffsets();
    void AssignOffsets();
    void EncodeLIR(LIR* lir);
    void DumpResourceMask(LIR* lir, uint64_t mask, const char* prefix);
    void SetupTargetResourceMasks(LIR* lir, uint64_t flags);
    const char* GetTargetInstFmt(int opcode);
    const char* GetTargetInstName(int opcode);
    std::string BuildInsnString(const char* fmt, LIR* lir, unsigned char* base_addr);
    uint64_t GetPCUseDefEncoding();
    uint64_t GetTargetInstFlags(int opcode);
    int GetInsnSize(LIR* lir);
    bool IsUnconditionalBranch(LIR* lir);

    // Required for target - Dalvik-level generators.
    void GenArithImmOpLong(Instruction::Code opcode, RegLocation rl_dest,
                           RegLocation rl_src1, RegLocation rl_src2);
    void GenArrayGet(int opt_flags, OpSize size, RegLocation rl_array,
                     RegLocation rl_index, RegLocation rl_dest, int scale);
    void GenArrayPut(int opt_flags, OpSize size, RegLocation rl_array, RegLocation rl_index,
                     RegLocation rl_src, int scale, bool card_mark);
    void GenShiftImmOpLong(Instruction::Code opcode, RegLocation rl_dest,
                           RegLocation rl_src1, RegLocation rl_shift);
    void GenMulLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenAddLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenAndLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenArithOpDouble(Instruction::Code opcode, RegLocation rl_dest,
                          RegLocation rl_src1, RegLocation rl_src2);
    void GenArithOpFloat(Instruction::Code opcode, RegLocation rl_dest,
                         RegLocation rl_src1, RegLocation rl_src2);
    void GenCmpFP(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1,
                  RegLocation rl_src2);
    void GenConversion(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src);
    bool GenInlinedCas(CallInfo* info, bool is_long, bool is_object);
    bool GenInlinedMinMaxInt(CallInfo* info, bool is_min);
    bool GenInlinedSqrt(CallInfo* info);
    bool GenInlinedPeek(CallInfo* info, OpSize size);
    bool GenInlinedPoke(CallInfo* info, OpSize size);
    void GenNegLong(RegLocation rl_dest, RegLocation rl_src);
    void GenOrLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenSubLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenXorLong(Instruction::Code opcode, RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    LIR* GenRegMemCheck(ConditionCode c_code, int reg1, int base, int offset,
                                ThrowKind kind);
    RegLocation GenDivRem(RegLocation rl_dest, int reg_lo, int reg_hi, bool is_div);
    RegLocation GenDivRemLit(RegLocation rl_dest, int reg_lo, int lit, bool is_div);
    void GenCmpLong(RegLocation rl_dest, RegLocation rl_src1, RegLocation rl_src2);
    void GenDivZeroCheck(int reg_lo, int reg_hi);
    void GenEntrySequence(RegLocation* ArgLocs, RegLocation rl_method);
    void GenExitSequence();
    void GenFillArrayData(DexOffset table_offset, RegLocation rl_src);
    void GenFusedFPCmpBranch(BasicBlock* bb, MIR* mir, bool gt_bias, bool is_double);
    void GenFusedLongCmpBranch(BasicBlock* bb, MIR* mir);
    void GenSelect(BasicBlock* bb, MIR* mir);
    void GenMemBarrier(MemBarrierKind barrier_kind);
    void GenMonitorEnter(int opt_flags, RegLocation rl_src);
    void GenMonitorExit(int opt_flags, RegLocation rl_src);
    void GenMoveException(RegLocation rl_dest);
    void GenMultiplyByTwoBitMultiplier(RegLocation rl_src, RegLocation rl_result, int lit,
                                               int first_bit, int second_bit);
    void GenNegDouble(RegLocation rl_dest, RegLocation rl_src);
    void GenNegFloat(RegLocation rl_dest, RegLocation rl_src);
    void GenPackedSwitch(MIR* mir, DexOffset table_offset, RegLocation rl_src);
    void GenSparseSwitch(MIR* mir, DexOffset table_offset, RegLocation rl_src);
    void GenSpecialCase(BasicBlock* bb, MIR* mir, const InlineMethod& special);

    // Required for target - single operation generators.
    LIR* OpUnconditionalBranch(LIR* target);
    LIR* OpCmpBranch(ConditionCode cond, int src1, int src2, LIR* target);
    LIR* OpCmpImmBranch(ConditionCode cond, int reg, int check_value, LIR* target);
    LIR* OpCondBranch(ConditionCode cc, LIR* target);
    LIR* OpDecAndBranch(ConditionCode c_code, int reg, LIR* target);
    LIR* OpFpRegCopy(int r_dest, int r_src);
    LIR* OpIT(ConditionCode cond, const char* guide);
    LIR* OpMem(OpKind op, int rBase, int disp);
    LIR* OpPcRelLoad(int reg, LIR* target);
    LIR* OpReg(OpKind op, int r_dest_src);
    LIR* OpRegCopy(int r_dest, int r_src);
    LIR* OpRegCopyNoInsert(int r_dest, int r_src);
    LIR* OpRegImm(OpKind op, int r_dest_src1, int value);
    LIR* OpRegMem(OpKind op, int r_dest, int rBase, int offset);
    LIR* OpRegReg(OpKind op, int r_dest_src1, int r_src2);
    LIR* OpCondRegReg(OpKind op, ConditionCode cc, int r_dest, int r_src);
    LIR* OpRegRegImm(OpKind op, int r_dest, int r_src1, int value);
    LIR* OpRegRegReg(OpKind op, int r_dest, int r_src1, int r_src2);
    LIR* OpTestSuspend(LIR* target);
    LIR* OpThreadMem(OpKind op, ThreadOffset thread_offset);
    LIR* OpVldm(int rBase, int count);
    LIR* OpVstm(int rBase, int count);
    void OpLea(int rBase, int reg1, int reg2, int scale, int offset);
    void OpRegCopyWide(int dest_lo, int dest_hi, int src_lo, int src_hi);
    void OpTlsCmp(ThreadOffset offset, int val);

    RegLocation ArgLoc(RegLocation loc);
    LIR* LoadBaseDispBody(int rBase, int displacement, int r_dest, int r_dest_hi, OpSize size,
                          int s_reg);
    LIR* StoreBaseDispBody(int rBase, int displacement, int r_src, int r_src_hi, OpSize size);
    void GenPrintLabel(MIR* mir);
    LIR* OpRegRegRegShift(OpKind op, int r_dest, int r_src1, int r_src2, int shift);
    LIR* OpRegRegShift(OpKind op, int r_dest_src1, int r_src2, int shift);
    static const ArmEncodingMap EncodingMap[kArmLast];
    int EncodeShift(int code, int amount);
    int ModifiedImmediate(uint32_t value);
    ArmConditionCode ArmConditionEncoding(ConditionCode code);
    bool InexpensiveConstantInt(int32_t value);
    bool InexpensiveConstantFloat(int32_t value);
    bool InexpensiveConstantLong(int64_t value);
    bool InexpensiveConstantDouble(int64_t value);

  private:
    void GenFusedLongCmpImmBranch(BasicBlock* bb, RegLocation rl_src1, int64_t val,
                                  ConditionCode ccode);
    int InPosition(int s_reg);
    RegLocation LoadArg(RegLocation loc);
    void LockLiveArgs(MIR* mir);
    MIR* GetNextMir(BasicBlock** p_bb, MIR* mir);
    MIR* SpecialIGet(BasicBlock** bb, MIR* mir, OpSize size, bool long_or_double, bool is_object);
    MIR* SpecialIPut(BasicBlock** bb, MIR* mir, OpSize size, bool long_or_double, bool is_object);
    MIR* SpecialIdentity(MIR* mir);
    LIR* LoadFPConstantValue(int r_dest, int value);
    bool BadOverlap(RegLocation rl_src, RegLocation rl_dest);
    void ReplaceFixup(LIR* prev_lir, LIR* orig_lir, LIR* new_lir);
    void InsertFixupBefore(LIR* prev_lir, LIR* orig_lir, LIR* new_lir);
    void AssignDataOffsets();
};

}  // namespace art

#endif  // ART_COMPILER_DEX_QUICK_ARM_CODEGEN_ARM_H_