src/compiler/compiler_enums.h

/*
 * Copyright (C) 2012 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_SRC_COMPILER_COMPILERENUMS_H_
#define ART_SRC_COMPILER_COMPILERENUMS_H_

#include "dex_instruction.h"

namespace art {

enum RegisterClass {
  kCoreReg,
  kFPReg,
  kAnyReg,
};

enum SpecialTargetRegister {
  kSelf,            // Thread pointer.
  kSuspend,         // Used to reduce suspend checks for some targets.
  kLr,
  kPc,
  kSp,
  kArg0,
  kArg1,
  kArg2,
  kArg3,
  kFArg0,
  kFArg1,
  kFArg2,
  kFArg3,
  kRet0,
  kRet1,
  kInvokeTgt,
  kCount
};

enum RegLocationType {
  kLocDalvikFrame = 0, // Normal Dalvik register
  kLocPhysReg,
  kLocCompilerTemp,
  kLocInvalid
};

enum BBType {
  kEntryBlock,
  kDalvikByteCode,
  kExitBlock,
  kExceptionHandling,
  kDead,
};

/*
 * Def/Use encoding in 64-bit use_mask/def_mask.  Low positions used for target-specific
 * registers (and typically use the register number as the position).  High positions
 * reserved for common and abstract resources.
 */

enum ResourceEncodingPos {
  kMustNotAlias = 63,
  kHeapRef = 62,          // Default memory reference type.
  kLiteral = 61,          // Literal pool memory reference.
  kDalvikReg = 60,        // Dalvik v_reg memory reference.
  kFPStatus = 59,
  kCCode = 58,
  kLowestCommonResource = kCCode
};

// Shared pseudo opcodes - must be < 0.
enum LIRPseudoOpcode {
  kPseudoExportedPC = -18,
  kPseudoSafepointPC = -17,
  kPseudoIntrinsicRetry = -16,
  kPseudoSuspendTarget = -15,
  kPseudoThrowTarget = -14,
  kPseudoCaseLabel = -13,
  kPseudoMethodEntry = -12,
  kPseudoMethodExit = -11,
  kPseudoBarrier = -10,
  kPseudoExtended = -9,
  kPseudoSSARep = -8,
  kPseudoEntryBlock = -7,
  kPseudoExitBlock = -6,
  kPseudoTargetLabel = -5,
  kPseudoDalvikByteCodeBoundary = -4,
  kPseudoPseudoAlign4 = -3,
  kPseudoEHBlockLabel = -2,
  kPseudoNormalBlockLabel = -1,
};

enum ExtendedMIROpcode {
  kMirOpFirst = kNumPackedOpcodes,
  kMirOpPhi = kMirOpFirst,
  kMirOpCopy,
  kMirOpFusedCmplFloat,
  kMirOpFusedCmpgFloat,
  kMirOpFusedCmplDouble,
  kMirOpFusedCmpgDouble,
  kMirOpFusedCmpLong,
  kMirOpNop,
  kMirOpNullCheck,
  kMirOpRangeCheck,
  kMirOpDivZeroCheck,
  kMirOpCheck,
  kMirOpLast,
};

enum MIROptimizationFlagPositons {
  kMIRIgnoreNullCheck = 0,
  kMIRNullCheckOnly,
  kMIRIgnoreRangeCheck,
  kMIRRangeCheckOnly,
  kMIRInlined,                        // Invoke is inlined (ie dead).
  kMIRInlinedPred,                    // Invoke is inlined via prediction.
  kMIRCallee,                         // Instruction is inlined from callee.
  kMIRIgnoreSuspendCheck,
  kMIRDup,
  kMIRMark,                           // Temporary node mark.
};

// For successor_block_list.
enum BlockListType {
  kNotUsed = 0,
  kCatch,
  kPackedSwitch,
  kSparseSwitch,
};

enum AssemblerStatus {
  kSuccess,
  kRetryAll,
};

enum OpSize {
  kWord,
  kLong,
  kSingle,
  kDouble,
  kUnsignedHalf,
  kSignedHalf,
  kUnsignedByte,
  kSignedByte,
};

std::ostream& operator<<(std::ostream& os, const OpSize& kind);

enum OpKind {
  kOpMov,
  kOpMvn,
  kOpCmp,
  kOpLsl,
  kOpLsr,
  kOpAsr,
  kOpRor,
  kOpNot,
  kOpAnd,
  kOpOr,
  kOpXor,
  kOpNeg,
  kOpAdd,
  kOpAdc,
  kOpSub,
  kOpSbc,
  kOpRsub,
  kOpMul,
  kOpDiv,
  kOpRem,
  kOpBic,
  kOpCmn,
  kOpTst,
  kOpBkpt,
  kOpBlx,
  kOpPush,
  kOpPop,
  kOp2Char,
  kOp2Short,
  kOp2Byte,
  kOpCondBr,
  kOpUncondBr,
  kOpBx,
  kOpInvalid,
};

std::ostream& operator<<(std::ostream& os, const OpKind& kind);

enum ConditionCode {
  kCondEq,  // equal
  kCondNe,  // not equal
  kCondCs,  // carry set (unsigned less than)
  kCondUlt = kCondCs,
  kCondCc,  // carry clear (unsigned greater than or same)
  kCondUge = kCondCc,
  kCondMi,  // minus
  kCondPl,  // plus, positive or zero
  kCondVs,  // overflow
  kCondVc,  // no overflow
  kCondHi,  // unsigned greater than
  kCondLs,  // unsigned lower or same
  kCondGe,  // signed greater than or equal
  kCondLt,  // signed less than
  kCondGt,  // signed greater than
  kCondLe,  // signed less than or equal
  kCondAl,  // always
  kCondNv,  // never
};

std::ostream& operator<<(std::ostream& os, const ConditionCode& kind);

// Target specific condition encodings
enum ArmConditionCode {
  kArmCondEq = 0x0,  // 0000
  kArmCondNe = 0x1,  // 0001
  kArmCondCs = 0x2,  // 0010
  kArmCondCc = 0x3,  // 0011
  kArmCondMi = 0x4,  // 0100
  kArmCondPl = 0x5,  // 0101
  kArmCondVs = 0x6,  // 0110
  kArmCondVc = 0x7,  // 0111
  kArmCondHi = 0x8,  // 1000
  kArmCondLs = 0x9,  // 1001
  kArmCondGe = 0xa,  // 1010
  kArmCondLt = 0xb,  // 1011
  kArmCondGt = 0xc,  // 1100
  kArmCondLe = 0xd,  // 1101
  kArmCondAl = 0xe,  // 1110
  kArmCondNv = 0xf,  // 1111
};

std::ostream& operator<<(std::ostream& os, const ArmConditionCode& kind);

enum X86ConditionCode {
  kX86CondO   = 0x0,    // overflow
  kX86CondNo  = 0x1,    // not overflow

  kX86CondB   = 0x2,    // below
  kX86CondNae = kX86CondB,  // not-above-equal
  kX86CondC   = kX86CondB,  // carry

  kX86CondNb  = 0x3,    // not-below
  kX86CondAe  = kX86CondNb, // above-equal
  kX86CondNc  = kX86CondNb, // not-carry

  kX86CondZ   = 0x4,    // zero
  kX86CondEq  = kX86CondZ,  // equal

  kX86CondNz  = 0x5,    // not-zero
  kX86CondNe  = kX86CondNz, // not-equal

  kX86CondBe  = 0x6,    // below-equal
  kX86CondNa  = kX86CondBe, // not-above

  kX86CondNbe = 0x7,    // not-below-equal
  kX86CondA   = kX86CondNbe,// above

  kX86CondS   = 0x8,    // sign
  kX86CondNs  = 0x9,    // not-sign

  kX86CondP   = 0xa,    // 8-bit parity even
  kX86CondPE  = kX86CondP,

  kX86CondNp  = 0xb,    // 8-bit parity odd
  kX86CondPo  = kX86CondNp,

  kX86CondL   = 0xc,    // less-than
  kX86CondNge = kX86CondL,  // not-greater-equal

  kX86CondNl  = 0xd,    // not-less-than
  kX86CondGe  = kX86CondNl, // not-greater-equal

  kX86CondLe  = 0xe,    // less-than-equal
  kX86CondNg  = kX86CondLe, // not-greater

  kX86CondNle = 0xf,    // not-less-than
  kX86CondG   = kX86CondNle,// greater
};

std::ostream& operator<<(std::ostream& os, const X86ConditionCode& kind);

enum ThrowKind {
  kThrowNullPointer,
  kThrowDivZero,
  kThrowArrayBounds,
  kThrowNoSuchMethod,
  kThrowStackOverflow,
};

enum SpecialCaseHandler {
  kNoHandler,
  kNullMethod,
  kConstFunction,
  kIGet,
  kIGetBoolean,
  kIGetObject,
  kIGetByte,
  kIGetChar,
  kIGetShort,
  kIGetWide,
  kIPut,
  kIPutBoolean,
  kIPutObject,
  kIPutByte,
  kIPutChar,
  kIPutShort,
  kIPutWide,
  kIdentity,
};

enum DividePattern {
  DivideNone,
  Divide3,
  Divide5,
  Divide7,
};

std::ostream& operator<<(std::ostream& os, const DividePattern& pattern);

/* Customized node traversal orders for different needs */
enum DataFlowAnalysisMode {
  kAllNodes = 0,              // All nodes.
  kReachableNodes,            // All reachable nodes.
  kPreOrderDFSTraversal,      // Depth-First-Search / Pre-Order.
  kPostOrderDFSTraversal,     // Depth-First-Search / Post-Order.
  kPostOrderDOMTraversal,     // Dominator tree / Post-Order.
  kReversePostOrderTraversal, // Depth-First-Search / reverse Post-Order.
};

std::ostream& operator<<(std::ostream& os, const DataFlowAnalysisMode& mode);

// Memory barrier types (see "The JSR-133 Cookbook for Compiler Writers").
enum MemBarrierKind {
  kLoadStore,
  kLoadLoad,
  kStoreStore,
  kStoreLoad
};

std::ostream& operator<<(std::ostream& os, const MemBarrierKind& kind);

enum OpFeatureFlags {
  kIsBranch = 0,
  kNoOperand,
  kIsUnaryOp,
  kIsBinaryOp,
  kIsTertiaryOp,
  kIsQuadOp,
  kIsQuinOp,
  kIsSextupleOp,
  kIsIT,
  kMemLoad,
  kMemStore,
  kPCRelFixup, // x86 FIXME: add NEEDS_FIXUP to instruction attributes.
  kRegDef0,
  kRegDef1,
  kRegDefA,
  kRegDefD,
  kRegDefFPCSList0,
  kRegDefFPCSList2,
  kRegDefList0,
  kRegDefList1,
  kRegDefList2,
  kRegDefLR,
  kRegDefSP,
  kRegUse0,
  kRegUse1,
  kRegUse2,
  kRegUse3,
  kRegUse4,
  kRegUseA,
  kRegUseC,
  kRegUseD,
  kRegUseFPCSList0,
  kRegUseFPCSList2,
  kRegUseList0,
  kRegUseList1,
  kRegUseLR,
  kRegUsePC,
  kRegUseSP,
  kSetsCCodes,
  kUsesCCodes
};

std::ostream& operator<<(std::ostream& os, const OpFeatureFlags& flag);

}  // namespace art

#endif // ART_SRC_COMPILER_COMPILERENUMS_H_