X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FARM%2FARMMCCodeEmitter.cpp;h=7f34ee96e379ed4eeebb3d0ef26d230bff9ead53;hb=c266600bec4b5ba0ee93ffdfeaafcab8f1295145;hp=bd799f233c07373141878b7e239353433f1bd9aa;hpb=d92354c5742ea72abd3039cda5be37cc757d47d2;p=oota-llvm.git diff --git a/lib/Target/ARM/ARMMCCodeEmitter.cpp b/lib/Target/ARM/ARMMCCodeEmitter.cpp index bd799f233c0..7f34ee96e37 100644 --- a/lib/Target/ARM/ARMMCCodeEmitter.cpp +++ b/lib/Target/ARM/ARMMCCodeEmitter.cpp @@ -11,7 +11,7 @@ // //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "arm-emitter" +#define DEBUG_TYPE "mccodeemitter" #include "ARM.h" #include "ARMAddressingModes.h" #include "ARMFixupKinds.h" @@ -41,12 +41,32 @@ public: ~ARMMCCodeEmitter() {} - unsigned getNumFixupKinds() const { return 2; } + unsigned getNumFixupKinds() const { return ARM::NumTargetFixupKinds; } const MCFixupKindInfo &getFixupKindInfo(MCFixupKind Kind) const { const static MCFixupKindInfo Infos[] = { - { "fixup_arm_pcrel_12", 2, 12, MCFixupKindInfo::FKF_IsPCRel }, - { "fixup_arm_vfp_pcrel_12", 3, 8, MCFixupKindInfo::FKF_IsPCRel }, +// This table *must* be in the order that the fixup_* kinds are defined in +// ARMFixupKinds.h. +// +// Name Offset (bits) Size (bits) Flags +{ "fixup_arm_ldst_pcrel_12", 1, 24, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_t2_ldst_pcrel_12", 0, 32, MCFixupKindInfo::FKF_IsPCRel | + MCFixupKindInfo::FKF_IsAligned}, +{ "fixup_arm_pcrel_10", 1, 24, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_t2_pcrel_10", 0, 32, MCFixupKindInfo::FKF_IsPCRel | + MCFixupKindInfo::FKF_IsAligned}, +{ "fixup_arm_adr_pcrel_12", 1, 24, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_branch", 1, 24, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_t2_condbranch", 0, 32, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_t2_uncondbranch", 0, 32, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_br", 0, 16, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_bl", 0, 32, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_blx", 7, 21, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_cb", 0, 16, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_cp", 1, 8, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_thumb_bcc", 1, 8, MCFixupKindInfo::FKF_IsPCRel }, +{ "fixup_arm_movt_hi16", 0, 16, 0 }, +{ "fixup_arm_movw_lo16", 0, 16, 0 }, }; if (Kind < FirstTargetFixupKind) @@ -68,20 +88,128 @@ public: unsigned getMachineOpValue(const MCInst &MI,const MCOperand &MO, SmallVectorImpl &Fixups) const; + /// getMovtImmOpValue - Return the encoding for the movw/movt pair + uint32_t getMovtImmOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + bool EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg, unsigned &Imm, SmallVectorImpl &Fixups) const; + /// getThumbBLTargetOpValue - Return encoding info for Thumb immediate + /// BL branch target. + uint32_t getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate + /// BLX branch target. + uint32_t getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getThumbBRTargetOpValue - Return encoding info for Thumb branch target. + uint32_t getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target. + uint32_t getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getThumbCBTargetOpValue - Return encoding info for Thumb branch target. + uint32_t getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getBranchTargetOpValue - Return encoding info for 24-bit immediate + /// branch target. + uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit + /// immediate Thumb2 direct branch target. + uint32_t getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + + /// getAdrLabelOpValue - Return encoding info for 12-bit immediate + /// ADR label target. + uint32_t getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' /// operand. uint32_t getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx, SmallVectorImpl &Fixups) const; + /// getTAddrModeRegRegOpValue - Return encoding for 'reg + reg' operand. + uint32_t getTAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getT2AddrModeImm8s4OpValue - Return encoding info for 'reg +/- imm8<<2' + /// operand. + uint32_t getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getLdStSORegOpValue - Return encoding info for 'reg +/- reg shop imm' /// operand as needed by load/store instructions. uint32_t getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx, SmallVectorImpl &Fixups) const; + /// getLdStmModeOpValue - Return encoding for load/store multiple mode. + uint32_t getLdStmModeOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + ARM_AM::AMSubMode Mode = (ARM_AM::AMSubMode)MI.getOperand(OpIdx).getImm(); + switch (Mode) { + default: assert(0 && "Unknown addressing sub-mode!"); + case ARM_AM::da: return 0; + case ARM_AM::ia: return 1; + case ARM_AM::db: return 2; + case ARM_AM::ib: return 3; + } + } + /// getShiftOp - Return the shift opcode (bit[6:5]) of the immediate value. + /// + unsigned getShiftOp(ARM_AM::ShiftOpc ShOpc) const { + switch (ShOpc) { + default: llvm_unreachable("Unknown shift opc!"); + case ARM_AM::no_shift: + case ARM_AM::lsl: return 0; + case ARM_AM::lsr: return 1; + case ARM_AM::asr: return 2; + case ARM_AM::ror: + case ARM_AM::rrx: return 3; + } + return 0; + } + + /// getAddrMode2OpValue - Return encoding for addrmode2 operands. + uint32_t getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getAddrMode2OffsetOpValue - Return encoding for am2offset operands. + uint32_t getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getAddrMode3OffsetOpValue - Return encoding for am3offset operands. + uint32_t getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getAddrMode3OpValue - Return encoding for addrmode3 operands. + uint32_t getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getAddrModeThumbSPOpValue - Return encoding info for 'reg +/- imm12' + /// operand. + uint32_t getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + + /// getAddrModeSOpValue - Encode the t_addrmode_s# operands. + uint32_t getAddrModeSOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &) const; + + /// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands. + uint32_t getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const; + /// getAddrMode5OpValue - Return encoding info for 'reg +/- imm8' operand. uint32_t getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx, SmallVectorImpl &Fixups) const; @@ -110,9 +238,29 @@ public: return Binary; } + /// getT2SOImmOpValue - Return an encoded 12-bit shifted-immediate value. + unsigned getT2SOImmOpValue(const MCInst &MI, unsigned Op, + SmallVectorImpl &Fixups) const { + unsigned SoImm = MI.getOperand(Op).getImm(); + unsigned Encoded = ARM_AM::getT2SOImmVal(SoImm); + assert(Encoded != ~0U && "Not a Thumb2 so_imm value?"); + return Encoded; + } + + unsigned getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const; + unsigned getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const; + unsigned getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const; + unsigned getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const; + /// getSORegOpValue - Return an encoded so_reg shifted register value. unsigned getSORegOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const; + unsigned getT2SORegOpValue(const MCInst &MI, unsigned Op, + SmallVectorImpl &Fixups) const; unsigned getRotImmOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const { @@ -142,9 +290,21 @@ public: SmallVectorImpl &Fixups) const; unsigned getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const; + unsigned getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op, + SmallVectorImpl &Fixups) const; unsigned getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const; + unsigned NEONThumb2DataIPostEncoder(const MCInst &MI, + unsigned EncodedValue) const; + unsigned NEONThumb2LoadStorePostEncoder(const MCInst &MI, + unsigned EncodedValue) const; + unsigned NEONThumb2DupPostEncoder(const MCInst &MI, + unsigned EncodedValue) const; + + unsigned VFPThumb2PostEncoder(const MCInst &MI, + unsigned EncodedValue) const; + void EmitByte(unsigned char C, raw_ostream &OS) const { OS << (char)C; } @@ -168,6 +328,65 @@ MCCodeEmitter *llvm::createARMMCCodeEmitter(const Target &, TargetMachine &TM, return new ARMMCCodeEmitter(TM, Ctx); } +/// NEONThumb2DataIPostEncoder - Post-process encoded NEON data-processing +/// instructions, and rewrite them to their Thumb2 form if we are currently in +/// Thumb2 mode. +unsigned ARMMCCodeEmitter::NEONThumb2DataIPostEncoder(const MCInst &MI, + unsigned EncodedValue) const { + const ARMSubtarget &Subtarget = TM.getSubtarget(); + if (Subtarget.isThumb2()) { + // NEON Thumb2 data-processsing encodings are very simple: bit 24 is moved + // to bit 12 of the high half-word (i.e. bit 28), and bits 27-24 are + // set to 1111. + unsigned Bit24 = EncodedValue & 0x01000000; + unsigned Bit28 = Bit24 << 4; + EncodedValue &= 0xEFFFFFFF; + EncodedValue |= Bit28; + EncodedValue |= 0x0F000000; + } + + return EncodedValue; +} + +/// NEONThumb2LoadStorePostEncoder - Post-process encoded NEON load/store +/// instructions, and rewrite them to their Thumb2 form if we are currently in +/// Thumb2 mode. +unsigned ARMMCCodeEmitter::NEONThumb2LoadStorePostEncoder(const MCInst &MI, + unsigned EncodedValue) const { + const ARMSubtarget &Subtarget = TM.getSubtarget(); + if (Subtarget.isThumb2()) { + EncodedValue &= 0xF0FFFFFF; + EncodedValue |= 0x09000000; + } + + return EncodedValue; +} + +/// NEONThumb2DupPostEncoder - Post-process encoded NEON vdup +/// instructions, and rewrite them to their Thumb2 form if we are currently in +/// Thumb2 mode. +unsigned ARMMCCodeEmitter::NEONThumb2DupPostEncoder(const MCInst &MI, + unsigned EncodedValue) const { + const ARMSubtarget &Subtarget = TM.getSubtarget(); + if (Subtarget.isThumb2()) { + EncodedValue &= 0x00FFFFFF; + EncodedValue |= 0xEE000000; + } + + return EncodedValue; +} + +/// VFPThumb2PostEncoder - Post-process encoded VFP instructions and rewrite +/// them to their Thumb2 form if we are currently in Thumb2 mode. +unsigned ARMMCCodeEmitter:: +VFPThumb2PostEncoder(const MCInst &MI, unsigned EncodedValue) const { + if (TM.getSubtarget().isThumb2()) { + EncodedValue &= 0x0FFFFFFF; + EncodedValue |= 0xE0000000; + } + return EncodedValue; +} + /// getMachineOpValue - Return binary encoding of operand. If the machine /// operand requires relocation, record the relocation and return zero. unsigned ARMMCCodeEmitter:: @@ -177,7 +396,7 @@ getMachineOpValue(const MCInst &MI, const MCOperand &MO, unsigned Reg = MO.getReg(); unsigned RegNo = getARMRegisterNumbering(Reg); - // Q registers are encodes as 2x their register number. + // Q registers are encoded as 2x their register number. switch (Reg) { default: return RegNo; @@ -194,10 +413,7 @@ getMachineOpValue(const MCInst &MI, const MCOperand &MO, .bitcastToAPInt().getHiBits(32).getLimitedValue()); } -#ifndef NDEBUG - errs() << MO; -#endif - llvm_unreachable(0); + llvm_unreachable("Unable to encode MCOperand!"); return 0; } @@ -227,6 +443,118 @@ EncodeAddrModeOpValues(const MCInst &MI, unsigned OpIdx, unsigned &Reg, return isAdd; } +/// getBranchTargetOpValue - Helper function to get the branch target operand, +/// which is either an immediate or requires a fixup. +static uint32_t getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx, + unsigned FixupKind, + SmallVectorImpl &Fixups) { + const MCOperand &MO = MI.getOperand(OpIdx); + + // If the destination is an immediate, we have nothing to do. + if (MO.isImm()) return MO.getImm(); + assert(MO.isExpr() && "Unexpected branch target type!"); + const MCExpr *Expr = MO.getExpr(); + MCFixupKind Kind = MCFixupKind(FixupKind); + Fixups.push_back(MCFixup::Create(0, Expr, Kind)); + + // All of the information is in the fixup. + return 0; +} + +/// getThumbBLTargetOpValue - Return encoding info for immediate branch target. +uint32_t ARMMCCodeEmitter:: +getThumbBLTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bl, Fixups); +} + +/// getThumbBLXTargetOpValue - Return encoding info for Thumb immediate +/// BLX branch target. +uint32_t ARMMCCodeEmitter:: +getThumbBLXTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_blx, Fixups); +} + +/// getThumbBRTargetOpValue - Return encoding info for Thumb branch target. +uint32_t ARMMCCodeEmitter:: +getThumbBRTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_br, Fixups); +} + +/// getThumbBCCTargetOpValue - Return encoding info for Thumb branch target. +uint32_t ARMMCCodeEmitter:: +getThumbBCCTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_bcc, Fixups); +} + +/// getThumbCBTargetOpValue - Return encoding info for Thumb branch target. +uint32_t ARMMCCodeEmitter:: +getThumbCBTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cb, Fixups); +} + +/// getBranchTargetOpValue - Return encoding info for 24-bit immediate branch +/// target. +uint32_t ARMMCCodeEmitter:: +getBranchTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // FIXME: This really, really shouldn't use TargetMachine. We don't want + // coupling between MC and TM anywhere we can help it. + const ARMSubtarget &Subtarget = TM.getSubtarget(); + if (Subtarget.isThumb2()) + return + ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_condbranch, Fixups); + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_branch, Fixups); +} + +/// getUnconditionalBranchTargetOpValue - Return encoding info for 24-bit +/// immediate branch target. +uint32_t ARMMCCodeEmitter:: +getUnconditionalBranchTargetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + unsigned Val = + ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_t2_uncondbranch, Fixups); + bool I = (Val & 0x800000); + bool J1 = (Val & 0x400000); + bool J2 = (Val & 0x200000); + if (I ^ J1) + Val &= ~0x400000; + else + Val |= 0x400000; + + if (I ^ J2) + Val &= ~0x200000; + else + Val |= 0x200000; + + return Val; +} + +/// getAdrLabelOpValue - Return encoding info for 12-bit immediate ADR label +/// target. +uint32_t ARMMCCodeEmitter:: +getAdrLabelOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + assert(MI.getOperand(OpIdx).isExpr() && "Unexpected adr target type!"); + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_adr_pcrel_12, + Fixups); +} + +/// getTAddrModeRegRegOpValue - Return encoding info for 'reg + reg' operand. +uint32_t ARMMCCodeEmitter:: +getTAddrModeRegRegOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + const MCOperand &MO1 = MI.getOperand(OpIdx); + const MCOperand &MO2 = MI.getOperand(OpIdx+1); + unsigned Rn = getARMRegisterNumbering(MO1.getReg()); + unsigned Rm = getARMRegisterNumbering(MO2.getReg()); + return (Rm << 3) | Rn; +} + /// getAddrModeImm12OpValue - Return encoding info for 'reg +/- imm12' operand. uint32_t ARMMCCodeEmitter:: getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx, @@ -238,13 +566,24 @@ getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx, bool isAdd = true; // If The first operand isn't a register, we have a label reference. const MCOperand &MO = MI.getOperand(OpIdx); - if (!MO.isReg()) { + const MCOperand &MO2 = MI.getOperand(OpIdx+1); + if (!MO.isReg() || (MO.getReg() == ARM::PC && MO2.isExpr())) { Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC. Imm12 = 0; - - assert(MO.isExpr() && "Unexpected machine operand type!"); - const MCExpr *Expr = MO.getExpr(); - MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_12); + isAdd = false ; // 'U' bit is set as part of the fixup. + + const MCExpr *Expr = 0; + if (!MO.isReg()) + Expr = MO.getExpr(); + else + Expr = MO2.getExpr(); + + const ARMSubtarget &Subtarget = TM.getSubtarget(); + MCFixupKind Kind; + if (Subtarget.isThumb2()) + Kind = MCFixupKind(ARM::fixup_t2_ldst_pcrel_12); + else + Kind = MCFixupKind(ARM::fixup_arm_ldst_pcrel_12); Fixups.push_back(MCFixup::Create(0, Expr, Kind)); ++MCNumCPRelocations; @@ -259,6 +598,67 @@ getAddrModeImm12OpValue(const MCInst &MI, unsigned OpIdx, return Binary; } +/// getT2AddrModeImm8s4OpValue - Return encoding info for +/// 'reg +/- imm8<<2' operand. +uint32_t ARMMCCodeEmitter:: +getT2AddrModeImm8s4OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {12-9} = reg + // {8} = (U)nsigned (add == '1', sub == '0') + // {7-0} = imm8 + unsigned Reg, Imm8; + bool isAdd = true; + // If The first operand isn't a register, we have a label reference. + const MCOperand &MO = MI.getOperand(OpIdx); + if (!MO.isReg()) { + Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC. + Imm8 = 0; + isAdd = false ; // 'U' bit is set as part of the fixup. + + assert(MO.isExpr() && "Unexpected machine operand type!"); + const MCExpr *Expr = MO.getExpr(); + MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_pcrel_10); + Fixups.push_back(MCFixup::Create(0, Expr, Kind)); + + ++MCNumCPRelocations; + } else + isAdd = EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups); + + uint32_t Binary = (Imm8 >> 2) & 0xff; + // Immediate is always encoded as positive. The 'U' bit controls add vs sub. + if (isAdd) + Binary |= (1 << 8); + Binary |= (Reg << 9); + return Binary; +} + +uint32_t ARMMCCodeEmitter:: +getMovtImmOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {20-16} = imm{15-12} + // {11-0} = imm{11-0} + const MCOperand &MO = MI.getOperand(OpIdx); + if (MO.isImm()) { + return static_cast(MO.getImm()); + } else if (const MCSymbolRefExpr *Expr = + dyn_cast(MO.getExpr())) { + MCFixupKind Kind; + switch (Expr->getKind()) { + default: assert(0 && "Unsupported ARMFixup"); + case MCSymbolRefExpr::VK_ARM_HI16: + Kind = MCFixupKind(ARM::fixup_arm_movt_hi16); + break; + case MCSymbolRefExpr::VK_ARM_LO16: + Kind = MCFixupKind(ARM::fixup_arm_movw_lo16); + break; + } + Fixups.push_back(MCFixup::Create(0, Expr, Kind)); + return 0; + }; + llvm_unreachable("Unsupported MCExpr type in MCOperand!"); + return 0; +} + uint32_t ARMMCCodeEmitter:: getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx, SmallVectorImpl &Fixups) const { @@ -267,24 +667,10 @@ getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx, const MCOperand &MO2 = MI.getOperand(OpIdx+2); unsigned Rn = getARMRegisterNumbering(MO.getReg()); unsigned Rm = getARMRegisterNumbering(MO1.getReg()); - ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm()); unsigned ShImm = ARM_AM::getAM2Offset(MO2.getImm()); bool isAdd = ARM_AM::getAM2Op(MO2.getImm()) == ARM_AM::add; - unsigned SBits; - // LSL - 00 - // LSR - 01 - // ASR - 10 - // ROR - 11 - switch (ShOp) { - default: llvm_unreachable("Unknown shift opc!"); - case ARM_AM::no_shift: - assert(ShImm == 0 && "Non-zero shift amount with no shift type!"); - // fall through - case ARM_AM::lsl: SBits = 0x0; break; - case ARM_AM::lsr: SBits = 0x1; break; - case ARM_AM::asr: SBits = 0x2; break; - case ARM_AM::ror: SBits = 0x3; break; - } + ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(MO2.getImm()); + unsigned SBits = getShiftOp(ShOp); // {16-13} = Rn // {12} = isAdd @@ -293,7 +679,7 @@ getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx, // {4} = 0 // {6-5} = type // {11-7} = imm - int64_t Binary = Rm; + uint32_t Binary = Rm; Binary |= Rn << 13; Binary |= SBits << 5; Binary |= ShImm << 7; @@ -302,7 +688,131 @@ getLdStSORegOpValue(const MCInst &MI, unsigned OpIdx, return Binary; } -/// getAddrMode5OpValue - Return encoding info for 'reg +/- imm12' operand. +uint32_t ARMMCCodeEmitter:: +getAddrMode2OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {17-14} Rn + // {13} 1 == imm12, 0 == Rm + // {12} isAdd + // {11-0} imm12/Rm + const MCOperand &MO = MI.getOperand(OpIdx); + unsigned Rn = getARMRegisterNumbering(MO.getReg()); + uint32_t Binary = getAddrMode2OffsetOpValue(MI, OpIdx + 1, Fixups); + Binary |= Rn << 14; + return Binary; +} + +uint32_t ARMMCCodeEmitter:: +getAddrMode2OffsetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {13} 1 == imm12, 0 == Rm + // {12} isAdd + // {11-0} imm12/Rm + const MCOperand &MO = MI.getOperand(OpIdx); + const MCOperand &MO1 = MI.getOperand(OpIdx+1); + unsigned Imm = MO1.getImm(); + bool isAdd = ARM_AM::getAM2Op(Imm) == ARM_AM::add; + bool isReg = MO.getReg() != 0; + uint32_t Binary = ARM_AM::getAM2Offset(Imm); + // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm12 + if (isReg) { + ARM_AM::ShiftOpc ShOp = ARM_AM::getAM2ShiftOpc(Imm); + Binary <<= 7; // Shift amount is bits [11:7] + Binary |= getShiftOp(ShOp) << 5; // Shift type is bits [6:5] + Binary |= getARMRegisterNumbering(MO.getReg()); // Rm is bits [3:0] + } + return Binary | (isAdd << 12) | (isReg << 13); +} + +uint32_t ARMMCCodeEmitter:: +getAddrMode3OffsetOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {9} 1 == imm8, 0 == Rm + // {8} isAdd + // {7-4} imm7_4/zero + // {3-0} imm3_0/Rm + const MCOperand &MO = MI.getOperand(OpIdx); + const MCOperand &MO1 = MI.getOperand(OpIdx+1); + unsigned Imm = MO1.getImm(); + bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add; + bool isImm = MO.getReg() == 0; + uint32_t Imm8 = ARM_AM::getAM3Offset(Imm); + // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8 + if (!isImm) + Imm8 = getARMRegisterNumbering(MO.getReg()); + return Imm8 | (isAdd << 8) | (isImm << 9); +} + +uint32_t ARMMCCodeEmitter:: +getAddrMode3OpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // {13} 1 == imm8, 0 == Rm + // {12-9} Rn + // {8} isAdd + // {7-4} imm7_4/zero + // {3-0} imm3_0/Rm + const MCOperand &MO = MI.getOperand(OpIdx); + const MCOperand &MO1 = MI.getOperand(OpIdx+1); + const MCOperand &MO2 = MI.getOperand(OpIdx+2); + unsigned Rn = getARMRegisterNumbering(MO.getReg()); + unsigned Imm = MO2.getImm(); + bool isAdd = ARM_AM::getAM3Op(Imm) == ARM_AM::add; + bool isImm = MO1.getReg() == 0; + uint32_t Imm8 = ARM_AM::getAM3Offset(Imm); + // if reg +/- reg, Rm will be non-zero. Otherwise, we have reg +/- imm8 + if (!isImm) + Imm8 = getARMRegisterNumbering(MO1.getReg()); + return (Rn << 9) | Imm8 | (isAdd << 8) | (isImm << 13); +} + +/// getAddrModeThumbSPOpValue - Encode the t_addrmode_sp operands. +uint32_t ARMMCCodeEmitter:: +getAddrModeThumbSPOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // [SP, #imm] + // {7-0} = imm8 + const MCOperand &MO1 = MI.getOperand(OpIdx + 1); +#if 0 // FIXME: This crashes2003-05-14-initialize-string.c + assert(MI.getOperand(OpIdx).getReg() == ARM::SP && + "Unexpected base register!"); +#endif + // The immediate is already shifted for the implicit zeroes, so no change + // here. + return MO1.getImm() & 0xff; +} + +/// getAddrModeSOpValue - Encode the t_addrmode_s# operands. +uint32_t ARMMCCodeEmitter:: +getAddrModeSOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &) const { + // [Rn, Rm] + // {5-3} = Rm + // {2-0} = Rn + // + // [Rn, #imm] + // {7-3} = imm5 + // {2-0} = Rn + const MCOperand &MO = MI.getOperand(OpIdx); + const MCOperand &MO1 = MI.getOperand(OpIdx + 1); + const MCOperand &MO2 = MI.getOperand(OpIdx + 2); + unsigned Rn = getARMRegisterNumbering(MO.getReg()); + unsigned Imm5 = MO1.getImm(); + + if (MO2.getReg() != 0) + // Is an immediate. + Imm5 = getARMRegisterNumbering(MO2.getReg()); + + return ((Imm5 & 0x1f) << 3) | Rn; +} + +/// getAddrModePCOpValue - Return encoding for t_addrmode_pc operands. +uint32_t ARMMCCodeEmitter:: +getAddrModePCOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + return ::getBranchTargetOpValue(MI, OpIdx, ARM::fixup_arm_thumb_cp, Fixups); +} + +/// getAddrMode5OpValue - Return encoding info for 'reg +/- imm10' operand. uint32_t ARMMCCodeEmitter:: getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx, SmallVectorImpl &Fixups) const { @@ -310,24 +820,33 @@ getAddrMode5OpValue(const MCInst &MI, unsigned OpIdx, // {8} = (U)nsigned (add == '1', sub == '0') // {7-0} = imm8 unsigned Reg, Imm8; + bool isAdd; // If The first operand isn't a register, we have a label reference. const MCOperand &MO = MI.getOperand(OpIdx); if (!MO.isReg()) { Reg = getARMRegisterNumbering(ARM::PC); // Rn is PC. Imm8 = 0; + isAdd = false; // 'U' bit is handled as part of the fixup. assert(MO.isExpr() && "Unexpected machine operand type!"); const MCExpr *Expr = MO.getExpr(); - MCFixupKind Kind = MCFixupKind(ARM::fixup_arm_vfp_pcrel_12); + MCFixupKind Kind; + const ARMSubtarget &Subtarget = TM.getSubtarget(); + if (Subtarget.isThumb2()) + Kind = MCFixupKind(ARM::fixup_t2_pcrel_10); + else + Kind = MCFixupKind(ARM::fixup_arm_pcrel_10); Fixups.push_back(MCFixup::Create(0, Expr, Kind)); ++MCNumCPRelocations; - } else + } else { EncodeAddrModeOpValues(MI, OpIdx, Reg, Imm8, Fixups); + isAdd = ARM_AM::getAM5Op(Imm8) == ARM_AM::add; + } uint32_t Binary = ARM_AM::getAM5Offset(Imm8); // Immediate is always encoded as positive. The 'U' bit controls add vs sub. - if (ARM_AM::getAM5Op(Imm8) == ARM_AM::add) + if (isAdd) Binary |= (1 << 8); Binary |= (Reg << 9); return Binary; @@ -405,6 +924,118 @@ getSORegOpValue(const MCInst &MI, unsigned OpIdx, return Binary | ARM_AM::getSORegOffset(MO2.getImm()) << 7; } +unsigned ARMMCCodeEmitter:: +getT2AddrModeSORegOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const { + const MCOperand &MO1 = MI.getOperand(OpNum); + const MCOperand &MO2 = MI.getOperand(OpNum+1); + const MCOperand &MO3 = MI.getOperand(OpNum+2); + + // Encoded as [Rn, Rm, imm]. + // FIXME: Needs fixup support. + unsigned Value = getARMRegisterNumbering(MO1.getReg()); + Value <<= 4; + Value |= getARMRegisterNumbering(MO2.getReg()); + Value <<= 2; + Value |= MO3.getImm(); + + return Value; +} + +unsigned ARMMCCodeEmitter:: +getT2AddrModeImm8OpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const { + const MCOperand &MO1 = MI.getOperand(OpNum); + const MCOperand &MO2 = MI.getOperand(OpNum+1); + + // FIXME: Needs fixup support. + unsigned Value = getARMRegisterNumbering(MO1.getReg()); + + // Even though the immediate is 8 bits long, we need 9 bits in order + // to represent the (inverse of the) sign bit. + Value <<= 9; + int32_t tmp = (int32_t)MO2.getImm(); + if (tmp < 0) + tmp = abs(tmp); + else + Value |= 256; // Set the ADD bit + Value |= tmp & 255; + return Value; +} + +unsigned ARMMCCodeEmitter:: +getT2AddrModeImm8OffsetOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const { + const MCOperand &MO1 = MI.getOperand(OpNum); + + // FIXME: Needs fixup support. + unsigned Value = 0; + int32_t tmp = (int32_t)MO1.getImm(); + if (tmp < 0) + tmp = abs(tmp); + else + Value |= 256; // Set the ADD bit + Value |= tmp & 255; + return Value; +} + +unsigned ARMMCCodeEmitter:: +getT2AddrModeImm12OffsetOpValue(const MCInst &MI, unsigned OpNum, + SmallVectorImpl &Fixups) const { + const MCOperand &MO1 = MI.getOperand(OpNum); + + // FIXME: Needs fixup support. + unsigned Value = 0; + int32_t tmp = (int32_t)MO1.getImm(); + if (tmp < 0) + tmp = abs(tmp); + else + Value |= 4096; // Set the ADD bit + Value |= tmp & 4095; + return Value; +} + +unsigned ARMMCCodeEmitter:: +getT2SORegOpValue(const MCInst &MI, unsigned OpIdx, + SmallVectorImpl &Fixups) const { + // Sub-operands are [reg, imm]. The first register is Rm, the reg to be + // shifted. The second is the amount to shift by. + // + // {3-0} = Rm. + // {4} = 0 + // {6-5} = type + // {11-7} = imm + + const MCOperand &MO = MI.getOperand(OpIdx); + const MCOperand &MO1 = MI.getOperand(OpIdx + 1); + ARM_AM::ShiftOpc SOpc = ARM_AM::getSORegShOp(MO1.getImm()); + + // Encode Rm. + unsigned Binary = getARMRegisterNumbering(MO.getReg()); + + // Encode the shift opcode. + unsigned SBits = 0; + // Set shift operand (bit[6:4]). + // LSL - 000 + // LSR - 010 + // ASR - 100 + // ROR - 110 + switch (SOpc) { + default: llvm_unreachable("Unknown shift opc!"); + case ARM_AM::lsl: SBits = 0x0; break; + case ARM_AM::lsr: SBits = 0x2; break; + case ARM_AM::asr: SBits = 0x4; break; + case ARM_AM::ror: SBits = 0x6; break; + } + + Binary |= SBits << 4; + if (SOpc == ARM_AM::rrx) + return Binary; + + // Encode shift_imm bit[11:7]. + return Binary | ARM_AM::getSORegOffset(MO1.getImm()) << 7; +} + unsigned ARMMCCodeEmitter:: getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const { @@ -421,16 +1052,39 @@ getBitfieldInvertedMaskOpValue(const MCInst &MI, unsigned Op, unsigned ARMMCCodeEmitter:: getRegisterListOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const { - // Convert a list of GPRs into a bitfield (R0 -> bit 0). For each - // register in the list, set the corresponding bit. + // VLDM/VSTM: + // {12-8} = Vd + // {7-0} = Number of registers + // + // LDM/STM: + // {15-0} = Bitfield of GPRs. + unsigned Reg = MI.getOperand(Op).getReg(); + bool SPRRegs = ARM::SPRRegClass.contains(Reg); + bool DPRRegs = ARM::DPRRegClass.contains(Reg); + unsigned Binary = 0; - for (unsigned i = Op, e = MI.getNumOperands(); i < e; ++i) { - unsigned regno = getARMRegisterNumbering(MI.getOperand(i).getReg()); - Binary |= 1 << regno; + + if (SPRRegs || DPRRegs) { + // VLDM/VSTM + unsigned RegNo = getARMRegisterNumbering(Reg); + unsigned NumRegs = (MI.getNumOperands() - Op) & 0xff; + Binary |= (RegNo & 0x1f) << 8; + if (SPRRegs) + Binary |= NumRegs; + else + Binary |= NumRegs * 2; + } else { + for (unsigned I = Op, E = MI.getNumOperands(); I < E; ++I) { + unsigned RegNo = getARMRegisterNumbering(MI.getOperand(I).getReg()); + Binary |= 1 << RegNo; + } } + return Binary; } +/// getAddrMode6AddressOpValue - Encode an addrmode6 register number along +/// with the alignment operand. unsigned ARMMCCodeEmitter:: getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const { @@ -452,6 +1106,30 @@ getAddrMode6AddressOpValue(const MCInst &MI, unsigned Op, return RegNo | (Align << 4); } +/// getAddrMode6DupAddressOpValue - Encode an addrmode6 register number and +/// alignment operand for use in VLD-dup instructions. This is the same as +/// getAddrMode6AddressOpValue except for the alignment encoding, which is +/// different for VLD4-dup. +unsigned ARMMCCodeEmitter:: +getAddrMode6DupAddressOpValue(const MCInst &MI, unsigned Op, + SmallVectorImpl &Fixups) const { + const MCOperand &Reg = MI.getOperand(Op); + const MCOperand &Imm = MI.getOperand(Op + 1); + + unsigned RegNo = getARMRegisterNumbering(Reg.getReg()); + unsigned Align = 0; + + switch (Imm.getImm()) { + default: break; + case 2: + case 4: + case 8: Align = 0x01; break; + case 16: Align = 0x03; break; + } + + return RegNo | (Align << 4); +} + unsigned ARMMCCodeEmitter:: getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op, SmallVectorImpl &Fixups) const { @@ -463,12 +1141,27 @@ getAddrMode6OffsetOpValue(const MCInst &MI, unsigned Op, void ARMMCCodeEmitter:: EncodeInstruction(const MCInst &MI, raw_ostream &OS, SmallVectorImpl &Fixups) const { + const ARMSubtarget &Subtarget = TM.getSubtarget(); // Pseudo instructions don't get encoded. const TargetInstrDesc &Desc = TII.get(MI.getOpcode()); - if ((Desc.TSFlags & ARMII::FormMask) == ARMII::Pseudo) + uint64_t TSFlags = Desc.TSFlags; + if ((TSFlags & ARMII::FormMask) == ARMII::Pseudo) return; - - EmitConstant(getBinaryCodeForInstr(MI, Fixups), 4, OS); + int Size; + // Basic size info comes from the TSFlags field. + switch ((TSFlags & ARMII::SizeMask) >> ARMII::SizeShift) { + default: llvm_unreachable("Unexpected instruction size!"); + case ARMII::Size2Bytes: Size = 2; break; + case ARMII::Size4Bytes: Size = 4; break; + } + uint32_t Binary = getBinaryCodeForInstr(MI, Fixups); + // Thumb 32-bit wide instructions need to be have the high order halfword + // emitted first. + if (Subtarget.isThumb() && Size == 4) { + EmitConstant(Binary >> 16, 2, OS); + EmitConstant(Binary & 0xffff, 2, OS); + } else + EmitConstant(Binary, Size, OS); ++MCNumEmitted; // Keep track of the # of mi's emitted. }