//===-- X86BaseInfo.h - Top level definitions for X86 -------- --*- C++ -*-===// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This file contains small standalone helper functions and enum definitions for // the X86 target useful for the compiler back-end and the MC libraries. // As such, it deliberately does not include references to LLVM core // code gen types, passes, etc.. // //===----------------------------------------------------------------------===// #ifndef LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H #define LLVM_LIB_TARGET_X86_MCTARGETDESC_X86BASEINFO_H #include "X86MCTargetDesc.h" #include "llvm/MC/MCInstrDesc.h" #include "llvm/Support/DataTypes.h" #include "llvm/Support/ErrorHandling.h" namespace llvm { namespace X86 { // Enums for memory operand decoding. Each memory operand is represented with // a 5 operand sequence in the form: // [BaseReg, ScaleAmt, IndexReg, Disp, Segment] // These enums help decode this. enum { AddrBaseReg = 0, AddrScaleAmt = 1, AddrIndexReg = 2, AddrDisp = 3, /// AddrSegmentReg - The operand # of the segment in the memory operand. AddrSegmentReg = 4, /// AddrNumOperands - Total number of operands in a memory reference. AddrNumOperands = 5 }; /// AVX512 static rounding constants. These need to match the values in /// avx512fintrin.h. enum STATIC_ROUNDING { TO_NEAREST_INT = 0, TO_NEG_INF = 1, TO_POS_INF = 2, TO_ZERO = 3, CUR_DIRECTION = 4 }; /// The constants to describe instr prefixes if there are enum IPREFIXES { IP_NO_PREFIX = 0, IP_HAS_OP_SIZE = 1, IP_HAS_AD_SIZE = 2, IP_HAS_REPEAT_NE = 4, IP_HAS_REPEAT = 8, IP_HAS_LOCK = 16, NO_SCHED_INFO = 32, // Don't add sched comment to the current instr because // it was already added IP_HAS_NOTRACK = 64 }; } // end namespace X86; /// X86II - This namespace holds all of the target specific flags that /// instruction info tracks. /// namespace X86II { /// Target Operand Flag enum. enum TOF { //===------------------------------------------------------------------===// // X86 Specific MachineOperand flags. MO_NO_FLAG, /// MO_GOT_ABSOLUTE_ADDRESS - On a symbol operand, this represents a /// relocation of: /// SYMBOL_LABEL + [. - PICBASELABEL] MO_GOT_ABSOLUTE_ADDRESS, /// MO_PIC_BASE_OFFSET - On a symbol operand this indicates that the /// immediate should get the value of the symbol minus the PIC base label: /// SYMBOL_LABEL - PICBASELABEL MO_PIC_BASE_OFFSET, /// MO_GOT - On a symbol operand this indicates that the immediate is the /// offset to the GOT entry for the symbol name from the base of the GOT. /// /// See the X86-64 ELF ABI supplement for more details. /// SYMBOL_LABEL @GOT MO_GOT, /// MO_GOTOFF - On a symbol operand this indicates that the immediate is /// the offset to the location of the symbol name from the base of the GOT. /// /// See the X86-64 ELF ABI supplement for more details. /// SYMBOL_LABEL @GOTOFF MO_GOTOFF, /// MO_GOTPCREL - On a symbol operand this indicates that the immediate is /// offset to the GOT entry for the symbol name from the current code /// location. /// /// See the X86-64 ELF ABI supplement for more details. /// SYMBOL_LABEL @GOTPCREL MO_GOTPCREL, /// MO_PLT - On a symbol operand this indicates that the immediate is /// offset to the PLT entry of symbol name from the current code location. /// /// See the X86-64 ELF ABI supplement for more details. /// SYMBOL_LABEL @PLT MO_PLT, /// MO_TLSGD - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the TLS index structure that contains /// the module number and variable offset for the symbol. Used in the /// general dynamic TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @TLSGD MO_TLSGD, /// MO_TLSLD - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the TLS index for the module that /// contains the symbol. When this index is passed to a call to /// __tls_get_addr, the function will return the base address of the TLS /// block for the symbol. Used in the x86-64 local dynamic TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @TLSLD MO_TLSLD, /// MO_TLSLDM - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the TLS index for the module that /// contains the symbol. When this index is passed to a call to /// ___tls_get_addr, the function will return the base address of the TLS /// block for the symbol. Used in the IA32 local dynamic TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @TLSLDM MO_TLSLDM, /// MO_GOTTPOFF - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the thread-pointer offset for the /// symbol. Used in the x86-64 initial exec TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @GOTTPOFF MO_GOTTPOFF, /// MO_INDNTPOFF - On a symbol operand this indicates that the immediate is /// the absolute address of the GOT entry with the negative thread-pointer /// offset for the symbol. Used in the non-PIC IA32 initial exec TLS access /// model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @INDNTPOFF MO_INDNTPOFF, /// MO_TPOFF - On a symbol operand this indicates that the immediate is /// the thread-pointer offset for the symbol. Used in the x86-64 local /// exec TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @TPOFF MO_TPOFF, /// MO_DTPOFF - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the TLS offset of the symbol. Used /// in the local dynamic TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @DTPOFF MO_DTPOFF, /// MO_NTPOFF - On a symbol operand this indicates that the immediate is /// the negative thread-pointer offset for the symbol. Used in the IA32 /// local exec TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @NTPOFF MO_NTPOFF, /// MO_GOTNTPOFF - On a symbol operand this indicates that the immediate is /// the offset of the GOT entry with the negative thread-pointer offset for /// the symbol. Used in the PIC IA32 initial exec TLS access model. /// /// See 'ELF Handling for Thread-Local Storage' for more details. /// SYMBOL_LABEL @GOTNTPOFF MO_GOTNTPOFF, /// MO_DLLIMPORT - On a symbol operand "FOO", this indicates that the /// reference is actually to the "__imp_FOO" symbol. This is used for /// dllimport linkage on windows. MO_DLLIMPORT, /// MO_DARWIN_NONLAZY - On a symbol operand "FOO", this indicates that the /// reference is actually to the "FOO$non_lazy_ptr" symbol, which is a /// non-PIC-base-relative reference to a non-hidden dyld lazy pointer stub. MO_DARWIN_NONLAZY, /// MO_DARWIN_NONLAZY_PIC_BASE - On a symbol operand "FOO", this indicates /// that the reference is actually to "FOO$non_lazy_ptr - PICBASE", which is /// a PIC-base-relative reference to a non-hidden dyld lazy pointer stub. MO_DARWIN_NONLAZY_PIC_BASE, /// MO_TLVP - On a symbol operand this indicates that the immediate is /// some TLS offset. /// /// This is the TLS offset for the Darwin TLS mechanism. MO_TLVP, /// MO_TLVP_PIC_BASE - On a symbol operand this indicates that the immediate /// is some TLS offset from the picbase. /// /// This is the 32-bit TLS offset for Darwin TLS in PIC mode. MO_TLVP_PIC_BASE, /// MO_SECREL - On a symbol operand this indicates that the immediate is /// the offset from beginning of section. /// /// This is the TLS offset for the COFF/Windows TLS mechanism. MO_SECREL, /// MO_ABS8 - On a symbol operand this indicates that the symbol is known /// to be an absolute symbol in range [0,128), so we can use the @ABS8 /// symbol modifier. MO_ABS8, }; enum : uint64_t { //===------------------------------------------------------------------===// // Instruction encodings. These are the standard/most common forms for X86 // instructions. // // PseudoFrm - This represents an instruction that is a pseudo instruction // or one that has not been implemented yet. It is illegal to code generate // it, but tolerated for intermediate implementation stages. Pseudo = 0, /// Raw - This form is for instructions that don't have any operands, so /// they are just a fixed opcode value, like 'leave'. RawFrm = 1, /// AddRegFrm - This form is used for instructions like 'push r32' that have /// their one register operand added to their opcode. AddRegFrm = 2, /// RawFrmMemOffs - This form is for instructions that store an absolute /// memory offset as an immediate with a possible segment override. RawFrmMemOffs = 3, /// RawFrmSrc - This form is for instructions that use the source index /// register SI/ESI/RSI with a possible segment override. RawFrmSrc = 4, /// RawFrmDst - This form is for instructions that use the destination index /// register DI/EDI/ESI. RawFrmDst = 5, /// RawFrmSrc - This form is for instructions that use the source index /// register SI/ESI/ERI with a possible segment override, and also the /// destination index register DI/ESI/RDI. RawFrmDstSrc = 6, /// RawFrmImm8 - This is used for the ENTER instruction, which has two /// immediates, the first of which is a 16-bit immediate (specified by /// the imm encoding) and the second is a 8-bit fixed value. RawFrmImm8 = 7, /// RawFrmImm16 - This is used for CALL FAR instructions, which have two /// immediates, the first of which is a 16 or 32-bit immediate (specified by /// the imm encoding) and the second is a 16-bit fixed value. In the AMD /// manual, this operand is described as pntr16:32 and pntr16:16 RawFrmImm16 = 8, /// MRM[0-7][rm] - These forms are used to represent instructions that use /// a Mod/RM byte, and use the middle field to hold extended opcode /// information. In the intel manual these are represented as /0, /1, ... /// /// MRMDestMem - This form is used for instructions that use the Mod/RM byte /// to specify a destination, which in this case is memory. /// MRMDestMem = 32, /// MRMSrcMem - This form is used for instructions that use the Mod/RM byte /// to specify a source, which in this case is memory. /// MRMSrcMem = 33, /// MRMSrcMem4VOp3 - This form is used for instructions that encode /// operand 3 with VEX.VVVV and load from memory. /// MRMSrcMem4VOp3 = 34, /// MRMSrcMemOp4 - This form is used for instructions that use the Mod/RM /// byte to specify the fourth source, which in this case is memory. /// MRMSrcMemOp4 = 35, /// MRMXm - This form is used for instructions that use the Mod/RM byte /// to specify a memory source, but doesn't use the middle field. /// MRMXm = 39, // Instruction that uses Mod/RM but not the middle field. // Next, instructions that operate on a memory r/m operand... MRM0m = 40, MRM1m = 41, MRM2m = 42, MRM3m = 43, // Format /0 /1 /2 /3 MRM4m = 44, MRM5m = 45, MRM6m = 46, MRM7m = 47, // Format /4 /5 /6 /7 /// MRMDestReg - This form is used for instructions that use the Mod/RM byte /// to specify a destination, which in this case is a register. /// MRMDestReg = 48, /// MRMSrcReg - This form is used for instructions that use the Mod/RM byte /// to specify a source, which in this case is a register. /// MRMSrcReg = 49, /// MRMSrcReg4VOp3 - This form is used for instructions that encode /// operand 3 with VEX.VVVV and do not load from memory. /// MRMSrcReg4VOp3 = 50, /// MRMSrcRegOp4 - This form is used for instructions that use the Mod/RM /// byte to specify the fourth source, which in this case is a register. /// MRMSrcRegOp4 = 51, /// MRMXr - This form is used for instructions that use the Mod/RM byte /// to specify a register source, but doesn't use the middle field. /// MRMXr = 55, // Instruction that uses Mod/RM but not the middle field. // Instructions that operate on a register r/m operand... MRM0r = 56, MRM1r = 57, MRM2r = 58, MRM3r = 59, // Format /0 /1 /2 /3 MRM4r = 60, MRM5r = 61, MRM6r = 62, MRM7r = 63, // Format /4 /5 /6 /7 /// MRM_XX - A mod/rm byte of exactly 0xXX. MRM_C0 = 64, MRM_C1 = 65, MRM_C2 = 66, MRM_C3 = 67, MRM_C4 = 68, MRM_C5 = 69, MRM_C6 = 70, MRM_C7 = 71, MRM_C8 = 72, MRM_C9 = 73, MRM_CA = 74, MRM_CB = 75, MRM_CC = 76, MRM_CD = 77, MRM_CE = 78, MRM_CF = 79, MRM_D0 = 80, MRM_D1 = 81, MRM_D2 = 82, MRM_D3 = 83, MRM_D4 = 84, MRM_D5 = 85, MRM_D6 = 86, MRM_D7 = 87, MRM_D8 = 88, MRM_D9 = 89, MRM_DA = 90, MRM_DB = 91, MRM_DC = 92, MRM_DD = 93, MRM_DE = 94, MRM_DF = 95, MRM_E0 = 96, MRM_E1 = 97, MRM_E2 = 98, MRM_E3 = 99, MRM_E4 = 100, MRM_E5 = 101, MRM_E6 = 102, MRM_E7 = 103, MRM_E8 = 104, MRM_E9 = 105, MRM_EA = 106, MRM_EB = 107, MRM_EC = 108, MRM_ED = 109, MRM_EE = 110, MRM_EF = 111, MRM_F0 = 112, MRM_F1 = 113, MRM_F2 = 114, MRM_F3 = 115, MRM_F4 = 116, MRM_F5 = 117, MRM_F6 = 118, MRM_F7 = 119, MRM_F8 = 120, MRM_F9 = 121, MRM_FA = 122, MRM_FB = 123, MRM_FC = 124, MRM_FD = 125, MRM_FE = 126, MRM_FF = 127, FormMask = 127, //===------------------------------------------------------------------===// // Actual flags... // OpSize - OpSizeFixed implies instruction never needs a 0x66 prefix. // OpSize16 means this is a 16-bit instruction and needs 0x66 prefix in // 32-bit mode. OpSize32 means this is a 32-bit instruction needs a 0x66 // prefix in 16-bit mode. OpSizeShift = 7, OpSizeMask = 0x3 << OpSizeShift, OpSizeFixed = 0 << OpSizeShift, OpSize16 = 1 << OpSizeShift, OpSize32 = 2 << OpSizeShift, // AsSize - AdSizeX implies this instruction determines its need of 0x67 // prefix from a normal ModRM memory operand. The other types indicate that // an operand is encoded with a specific width and a prefix is needed if // it differs from the current mode. AdSizeShift = OpSizeShift + 2, AdSizeMask = 0x3 << AdSizeShift, AdSizeX = 0 << AdSizeShift, AdSize16 = 1 << AdSizeShift, AdSize32 = 2 << AdSizeShift, AdSize64 = 3 << AdSizeShift, //===------------------------------------------------------------------===// // OpPrefix - There are several prefix bytes that are used as opcode // extensions. These are 0x66, 0xF3, and 0xF2. If this field is 0 there is // no prefix. // OpPrefixShift = AdSizeShift + 2, OpPrefixMask = 0x3 << OpPrefixShift, // PD - Prefix code for packed double precision vector floating point // operations performed in the SSE registers. PD = 1 << OpPrefixShift, // XS, XD - These prefix codes are for single and double precision scalar // floating point operations performed in the SSE registers. XS = 2 << OpPrefixShift, XD = 3 << OpPrefixShift, //===------------------------------------------------------------------===// // OpMap - This field determines which opcode map this instruction // belongs to. i.e. one-byte, two-byte, 0x0f 0x38, 0x0f 0x3a, etc. // OpMapShift = OpPrefixShift + 2, OpMapMask = 0x7 << OpMapShift, // OB - OneByte - Set if this instruction has a one byte opcode. OB = 0 << OpMapShift, // TB - TwoByte - Set if this instruction has a two byte opcode, which // starts with a 0x0F byte before the real opcode. TB = 1 << OpMapShift, // T8, TA - Prefix after the 0x0F prefix. T8 = 2 << OpMapShift, TA = 3 << OpMapShift, // XOP8 - Prefix to include use of imm byte. XOP8 = 4 << OpMapShift, // XOP9 - Prefix to exclude use of imm byte. XOP9 = 5 << OpMapShift, // XOPA - Prefix to encode 0xA in VEX.MMMM of XOP instructions. XOPA = 6 << OpMapShift, /// ThreeDNow - This indicates that the instruction uses the /// wacky 0x0F 0x0F prefix for 3DNow! instructions. The manual documents /// this as having a 0x0F prefix with a 0x0F opcode, and each instruction /// storing a classifier in the imm8 field. To simplify our implementation, /// we handle this by storeing the classifier in the opcode field and using /// this flag to indicate that the encoder should do the wacky 3DNow! thing. ThreeDNow = 7 << OpMapShift, //===------------------------------------------------------------------===// // REX_W - REX prefixes are instruction prefixes used in 64-bit mode. // They are used to specify GPRs and SSE registers, 64-bit operand size, // etc. We only cares about REX.W and REX.R bits and only the former is // statically determined. // REXShift = OpMapShift + 3, REX_W = 1 << REXShift, //===------------------------------------------------------------------===// // This three-bit field describes the size of an immediate operand. Zero is // unused so that we can tell if we forgot to set a value. ImmShift = REXShift + 1, ImmMask = 15 << ImmShift, Imm8 = 1 << ImmShift, Imm8PCRel = 2 << ImmShift, Imm8Reg = 3 << ImmShift, Imm16 = 4 << ImmShift, Imm16PCRel = 5 << ImmShift, Imm32 = 6 << ImmShift, Imm32PCRel = 7 << ImmShift, Imm32S = 8 << ImmShift, Imm64 = 9 << ImmShift, //===------------------------------------------------------------------===// // FP Instruction Classification... Zero is non-fp instruction. // FPTypeMask - Mask for all of the FP types... FPTypeShift = ImmShift + 4, FPTypeMask = 7 << FPTypeShift, // NotFP - The default, set for instructions that do not use FP registers. NotFP = 0 << FPTypeShift, // ZeroArgFP - 0 arg FP instruction which implicitly pushes ST(0), f.e. fld0 ZeroArgFP = 1 << FPTypeShift, // OneArgFP - 1 arg FP instructions which implicitly read ST(0), such as fst OneArgFP = 2 << FPTypeShift, // OneArgFPRW - 1 arg FP instruction which implicitly read ST(0) and write a // result back to ST(0). For example, fcos, fsqrt, etc. // OneArgFPRW = 3 << FPTypeShift, // TwoArgFP - 2 arg FP instructions which implicitly read ST(0), and an // explicit argument, storing the result to either ST(0) or the implicit // argument. For example: fadd, fsub, fmul, etc... TwoArgFP = 4 << FPTypeShift, // CompareFP - 2 arg FP instructions which implicitly read ST(0) and an // explicit argument, but have no destination. Example: fucom, fucomi, ... CompareFP = 5 << FPTypeShift, // CondMovFP - "2 operand" floating point conditional move instructions. CondMovFP = 6 << FPTypeShift, // SpecialFP - Special instruction forms. Dispatch by opcode explicitly. SpecialFP = 7 << FPTypeShift, // Lock prefix LOCKShift = FPTypeShift + 3, LOCK = 1 << LOCKShift, // REP prefix REPShift = LOCKShift + 1, REP = 1 << REPShift, // Execution domain for SSE instructions. // 0 means normal, non-SSE instruction. SSEDomainShift = REPShift + 1, // Encoding EncodingShift = SSEDomainShift + 2, EncodingMask = 0x3 << EncodingShift, // VEX - encoding using 0xC4/0xC5 VEX = 1 << EncodingShift, /// XOP - Opcode prefix used by XOP instructions. XOP = 2 << EncodingShift, // VEX_EVEX - Specifies that this instruction use EVEX form which provides // syntax support up to 32 512-bit register operands and up to 7 16-bit // mask operands as well as source operand data swizzling/memory operand // conversion, eviction hint, and rounding mode. EVEX = 3 << EncodingShift, // Opcode OpcodeShift = EncodingShift + 2, /// VEX_W - Has a opcode specific functionality, but is used in the same /// way as REX_W is for regular SSE instructions. VEX_WShift = OpcodeShift + 8, VEX_W = 1ULL << VEX_WShift, /// VEX_4V - Used to specify an additional AVX/SSE register. Several 2 /// address instructions in SSE are represented as 3 address ones in AVX /// and the additional register is encoded in VEX_VVVV prefix. VEX_4VShift = VEX_WShift + 1, VEX_4V = 1ULL << VEX_4VShift, /// VEX_L - Stands for a bit in the VEX opcode prefix meaning the current /// instruction uses 256-bit wide registers. This is usually auto detected /// if a VR256 register is used, but some AVX instructions also have this /// field marked when using a f256 memory references. VEX_LShift = VEX_4VShift + 1, VEX_L = 1ULL << VEX_LShift, // EVEX_K - Set if this instruction requires masking EVEX_KShift = VEX_LShift + 1, EVEX_K = 1ULL << EVEX_KShift, // EVEX_Z - Set if this instruction has EVEX.Z field set. EVEX_ZShift = EVEX_KShift + 1, EVEX_Z = 1ULL << EVEX_ZShift, // EVEX_L2 - Set if this instruction has EVEX.L' field set. EVEX_L2Shift = EVEX_ZShift + 1, EVEX_L2 = 1ULL << EVEX_L2Shift, // EVEX_B - Set if this instruction has EVEX.B field set. EVEX_BShift = EVEX_L2Shift + 1, EVEX_B = 1ULL << EVEX_BShift, // The scaling factor for the AVX512's 8-bit compressed displacement. CD8_Scale_Shift = EVEX_BShift + 1, CD8_Scale_Mask = 127ULL << CD8_Scale_Shift, /// Explicitly specified rounding control EVEX_RCShift = CD8_Scale_Shift + 7, EVEX_RC = 1ULL << EVEX_RCShift, // NOTRACK prefix NoTrackShift = EVEX_RCShift + 1, NOTRACK = 1ULL << NoTrackShift }; // getBaseOpcodeFor - This function returns the "base" X86 opcode for the // specified machine instruction. // inline uint8_t getBaseOpcodeFor(uint64_t TSFlags) { return TSFlags >> X86II::OpcodeShift; } inline bool hasImm(uint64_t TSFlags) { return (TSFlags & X86II::ImmMask) != 0; } /// getSizeOfImm - Decode the "size of immediate" field from the TSFlags field /// of the specified instruction. inline unsigned getSizeOfImm(uint64_t TSFlags) { switch (TSFlags & X86II::ImmMask) { default: llvm_unreachable("Unknown immediate size"); case X86II::Imm8: case X86II::Imm8PCRel: case X86II::Imm8Reg: return 1; case X86II::Imm16: case X86II::Imm16PCRel: return 2; case X86II::Imm32: case X86II::Imm32S: case X86II::Imm32PCRel: return 4; case X86II::Imm64: return 8; } } /// isImmPCRel - Return true if the immediate of the specified instruction's /// TSFlags indicates that it is pc relative. inline unsigned isImmPCRel(uint64_t TSFlags) { switch (TSFlags & X86II::ImmMask) { default: llvm_unreachable("Unknown immediate size"); case X86II::Imm8PCRel: case X86II::Imm16PCRel: case X86II::Imm32PCRel: return true; case X86II::Imm8: case X86II::Imm8Reg: case X86II::Imm16: case X86II::Imm32: case X86II::Imm32S: case X86II::Imm64: return false; } } /// isImmSigned - Return true if the immediate of the specified instruction's /// TSFlags indicates that it is signed. inline unsigned isImmSigned(uint64_t TSFlags) { switch (TSFlags & X86II::ImmMask) { default: llvm_unreachable("Unknown immediate signedness"); case X86II::Imm32S: return true; case X86II::Imm8: case X86II::Imm8PCRel: case X86II::Imm8Reg: case X86II::Imm16: case X86II::Imm16PCRel: case X86II::Imm32: case X86II::Imm32PCRel: case X86II::Imm64: return false; } } /// getOperandBias - compute whether all of the def operands are repeated /// in the uses and therefore should be skipped. /// This determines the start of the unique operand list. We need to determine /// if all of the defs have a corresponding tied operand in the uses. /// Unfortunately, the tied operand information is encoded in the uses not /// the defs so we have to use some heuristics to find which operands to /// query. inline unsigned getOperandBias(const MCInstrDesc& Desc) { unsigned NumDefs = Desc.getNumDefs(); unsigned NumOps = Desc.getNumOperands(); switch (NumDefs) { default: llvm_unreachable("Unexpected number of defs"); case 0: return 0; case 1: // Common two addr case. if (NumOps > 1 && Desc.getOperandConstraint(1, MCOI::TIED_TO) == 0) return 1; // Check for AVX-512 scatter which has a TIED_TO in the second to last // operand. if (NumOps == 8 && Desc.getOperandConstraint(6, MCOI::TIED_TO) == 0) return 1; return 0; case 2: // XCHG/XADD have two destinations and two sources. if (NumOps >= 4 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 && Desc.getOperandConstraint(3, MCOI::TIED_TO) == 1) return 2; // Check for gather. AVX-512 has the second tied operand early. AVX2 // has it as the last op. if (NumOps == 9 && Desc.getOperandConstraint(2, MCOI::TIED_TO) == 0 && (Desc.getOperandConstraint(3, MCOI::TIED_TO) == 1 || Desc.getOperandConstraint(8, MCOI::TIED_TO) == 1) && "Instruction with 2 defs isn't gather?") return 2; return 0; } } /// getMemoryOperandNo - The function returns the MCInst operand # for the /// first field of the memory operand. If the instruction doesn't have a /// memory operand, this returns -1. /// /// Note that this ignores tied operands. If there is a tied register which /// is duplicated in the MCInst (e.g. "EAX = addl EAX, [mem]") it is only /// counted as one operand. /// inline int getMemoryOperandNo(uint64_t TSFlags) { bool HasVEX_4V = TSFlags & X86II::VEX_4V; bool HasEVEX_K = TSFlags & X86II::EVEX_K; switch (TSFlags & X86II::FormMask) { default: llvm_unreachable("Unknown FormMask value in getMemoryOperandNo!"); case X86II::Pseudo: case X86II::RawFrm: case X86II::AddRegFrm: case X86II::RawFrmImm8: case X86II::RawFrmImm16: case X86II::RawFrmMemOffs: case X86II::RawFrmSrc: case X86II::RawFrmDst: case X86II::RawFrmDstSrc: return -1; case X86II::MRMDestMem: return 0; case X86II::MRMSrcMem: // Start from 1, skip any registers encoded in VEX_VVVV or I8IMM, or a // mask register. return 1 + HasVEX_4V + HasEVEX_K; case X86II::MRMSrcMem4VOp3: // Skip registers encoded in reg. return 1 + HasEVEX_K; case X86II::MRMSrcMemOp4: // Skip registers encoded in reg, VEX_VVVV, and I8IMM. return 3; case X86II::MRMDestReg: case X86II::MRMSrcReg: case X86II::MRMSrcReg4VOp3: case X86II::MRMSrcRegOp4: case X86II::MRMXr: case X86II::MRM0r: case X86II::MRM1r: case X86II::MRM2r: case X86II::MRM3r: case X86II::MRM4r: case X86II::MRM5r: case X86II::MRM6r: case X86II::MRM7r: return -1; case X86II::MRMXm: case X86II::MRM0m: case X86II::MRM1m: case X86II::MRM2m: case X86II::MRM3m: case X86II::MRM4m: case X86II::MRM5m: case X86II::MRM6m: case X86II::MRM7m: // Start from 0, skip registers encoded in VEX_VVVV or a mask register. return 0 + HasVEX_4V + HasEVEX_K; case X86II::MRM_C0: case X86II::MRM_C1: case X86II::MRM_C2: case X86II::MRM_C3: case X86II::MRM_C4: case X86II::MRM_C5: case X86II::MRM_C6: case X86II::MRM_C7: case X86II::MRM_C8: case X86II::MRM_C9: case X86II::MRM_CA: case X86II::MRM_CB: case X86II::MRM_CC: case X86II::MRM_CD: case X86II::MRM_CE: case X86II::MRM_CF: case X86II::MRM_D0: case X86II::MRM_D1: case X86II::MRM_D2: case X86II::MRM_D3: case X86II::MRM_D4: case X86II::MRM_D5: case X86II::MRM_D6: case X86II::MRM_D7: case X86II::MRM_D8: case X86II::MRM_D9: case X86II::MRM_DA: case X86II::MRM_DB: case X86II::MRM_DC: case X86II::MRM_DD: case X86II::MRM_DE: case X86II::MRM_DF: case X86II::MRM_E0: case X86II::MRM_E1: case X86II::MRM_E2: case X86II::MRM_E3: case X86II::MRM_E4: case X86II::MRM_E5: case X86II::MRM_E6: case X86II::MRM_E7: case X86II::MRM_E8: case X86II::MRM_E9: case X86II::MRM_EA: case X86II::MRM_EB: case X86II::MRM_EC: case X86II::MRM_ED: case X86II::MRM_EE: case X86II::MRM_EF: case X86II::MRM_F0: case X86II::MRM_F1: case X86II::MRM_F2: case X86II::MRM_F3: case X86II::MRM_F4: case X86II::MRM_F5: case X86II::MRM_F6: case X86II::MRM_F7: case X86II::MRM_F8: case X86II::MRM_F9: case X86II::MRM_FA: case X86II::MRM_FB: case X86II::MRM_FC: case X86II::MRM_FD: case X86II::MRM_FE: case X86II::MRM_FF: return -1; } } /// isX86_64ExtendedReg - Is the MachineOperand a x86-64 extended (r8 or /// higher) register? e.g. r8, xmm8, xmm13, etc. inline bool isX86_64ExtendedReg(unsigned RegNo) { if ((RegNo >= X86::XMM8 && RegNo <= X86::XMM31) || (RegNo >= X86::YMM8 && RegNo <= X86::YMM31) || (RegNo >= X86::ZMM8 && RegNo <= X86::ZMM31)) return true; switch (RegNo) { default: break; case X86::R8: case X86::R9: case X86::R10: case X86::R11: case X86::R12: case X86::R13: case X86::R14: case X86::R15: case X86::R8D: case X86::R9D: case X86::R10D: case X86::R11D: case X86::R12D: case X86::R13D: case X86::R14D: case X86::R15D: case X86::R8W: case X86::R9W: case X86::R10W: case X86::R11W: case X86::R12W: case X86::R13W: case X86::R14W: case X86::R15W: case X86::R8B: case X86::R9B: case X86::R10B: case X86::R11B: case X86::R12B: case X86::R13B: case X86::R14B: case X86::R15B: case X86::CR8: case X86::CR9: case X86::CR10: case X86::CR11: case X86::CR12: case X86::CR13: case X86::CR14: case X86::CR15: case X86::DR8: case X86::DR9: case X86::DR10: case X86::DR11: case X86::DR12: case X86::DR13: case X86::DR14: case X86::DR15: return true; } return false; } /// is32ExtendedReg - Is the MemoryOperand a 32 extended (zmm16 or higher) /// registers? e.g. zmm21, etc. static inline bool is32ExtendedReg(unsigned RegNo) { return ((RegNo >= X86::XMM16 && RegNo <= X86::XMM31) || (RegNo >= X86::YMM16 && RegNo <= X86::YMM31) || (RegNo >= X86::ZMM16 && RegNo <= X86::ZMM31)); } inline bool isX86_64NonExtLowByteReg(unsigned reg) { return (reg == X86::SPL || reg == X86::BPL || reg == X86::SIL || reg == X86::DIL); } /// isKMasked - Is this a masked instruction. inline bool isKMasked(uint64_t TSFlags) { return (TSFlags & X86II::EVEX_K) != 0; } /// isKMergedMasked - Is this a merge masked instruction. inline bool isKMergeMasked(uint64_t TSFlags) { return isKMasked(TSFlags) && (TSFlags & X86II::EVEX_Z) == 0; } } } // end namespace llvm; #endif