//
//===----------------------------------------------------------------------===//
+#define DEBUG_TYPE "arm-disassembler"
+
#include "ARMDisassemblerCore.h"
#include "ARMAddressingModes.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/raw_ostream.h"
+
+//#define DEBUG(X) do { X; } while (0)
/// ARMGenInstrInfo.inc - ARMGenInstrInfo.inc contains the static const
/// TargetInstrDesc ARMInsts[] definition and the TargetOperandInfo[]'s
/// Uses and Defs by this instr. For the Uses part, the pred:$p operand is
/// defined with two components:
///
-/// def pred { // Operand PredicateOperand
+/// def pred { // Operand PredicateOperand
/// ValueType Type = OtherVT;
/// string PrintMethod = "printPredicateOperand";
/// string AsmOperandLowerMethod = ?;
///
/// For the Defs part, in the simple case of only cc_out:$s, we have:
///
-/// def cc_out { // Operand OptionalDefOperand
+/// def cc_out { // Operand OptionalDefOperand
/// ValueType Type = OtherVT;
/// string PrintMethod = "printSBitModifierOperand";
/// string AsmOperandLowerMethod = ?;
}
// Return the register enum Based on RegClass and the raw register number.
-// For DRegPair, see comments below.
// FIXME: Auto-gened?
-static unsigned getRegisterEnum(unsigned RegClassID, unsigned RawRegister,
- bool DRegPair = false) {
-
- if (DRegPair && RegClassID == ARM::QPRRegClassID) {
- // LLVM expects { Dd, Dd+1 } to form a super register; this is not specified
- // in the ARM Architecture Manual as far as I understand it (A8.6.307).
- // Therefore, we morph the RegClassID to be the sub register class and don't
- // subsequently transform the RawRegister encoding when calculating RegNum.
- //
- // See also ARMinstPrinter::printOperand() wrt "dregpair" modifier part
- // where this workaround is meant for.
- RegClassID = ARM::DPRRegClassID;
- }
+static unsigned
+getRegisterEnum(BO B, unsigned RegClassID, unsigned RawRegister) {
+ // For this purpose, we can treat rGPR as if it were GPR.
+ if (RegClassID == ARM::rGPRRegClassID) RegClassID = ARM::GPRRegClassID;
// See also decodeNEONRd(), decodeNEONRn(), decodeNEONRm().
unsigned RegNum =
}
break;
}
- assert(0 && "Invalid (RegClassID, RawRegister) combination");
+ DEBUG(errs() << "Invalid (RegClassID, RawRegister) combination\n");
+ // Encoding error. Mark the builder with error code != 0.
+ B->SetErr(-1);
return 0;
}
//
// A8-11: DecodeImmShift()
static inline void getImmShiftSE(ARM_AM::ShiftOpc &ShOp, unsigned &ShImm) {
- // If type == 0b11 and imm5 == 0, we have an rrx, instead.
- if (ShOp == ARM_AM::ror && ShImm == 0)
- ShOp = ARM_AM::rrx;
- // If (lsr or asr) and imm5 == 0, shift amount is 32.
- if ((ShOp == ARM_AM::lsr || ShOp == ARM_AM::asr) && ShImm == 0)
+ if (ShImm != 0)
+ return;
+ switch (ShOp) {
+ case ARM_AM::no_shift:
+ case ARM_AM::rrx:
+ break;
+ case ARM_AM::lsl:
+ ShOp = ARM_AM::no_shift;
+ break;
+ case ARM_AM::lsr:
+ case ARM_AM::asr:
ShImm = 32;
+ break;
+ case ARM_AM::ror:
+ ShOp = ARM_AM::rrx;
+ break;
+ }
}
// getAMSubModeForBits - getAMSubModeForBits translates from the ARM encoding
static bool DisassemblePseudo(MCInst &MI, unsigned Opcode, uint32_t insn,
unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- if (Opcode == ARM::Int_MemBarrierV7 || Opcode == ARM::Int_SyncBarrierV7)
- return true;
-
assert(0 && "Unexpected pseudo instruction!");
return false;
}
// Inst{3-0} => Rm
// Inst{11-8} => Rs
static bool DisassembleMulFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
unsigned short NumDefs = TID.getNumDefs();
if (NumDefs == 2) {
assert(NumOps >= 4 && OpInfo[3].RegClass == ARM::GPRRegClassID &&
"Expect 4th register operand");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
}
// The destination register: RdHi{19-16} or Rd{19-16}.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
// The two src regsiters: Rn{3-0}, then Rm{11-8}.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRs(insn))));
OpIdx += 3;
// Many multiply instructions (e.g., MLA) have three src registers.
// The third register operand is Ra{15-12}.
if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == ARM::GPRRegClassID) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
}
// and friends
//
static bool DisassembleCoprocessor(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 5 && "Num of operands >= 5 for coprocessor instr");
MI.addOperand(MCOperand::CreateImm(decodeRd(insn)));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
if (PW) {
MI.addOperand(MCOperand::CreateReg(0));
ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
+ const TargetInstrDesc &TID = ARMInsts[Opcode];
+ unsigned IndexMode =
+ (TID.TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift;
unsigned Offset = ARM_AM::getAM2Opc(AddrOpcode, slice(insn, 7, 0) << 2,
- ARM_AM::no_shift);
+ ARM_AM::no_shift, IndexMode);
MI.addOperand(MCOperand::CreateImm(Offset));
OpIdx = 5;
} else {
MI.addOperand(NoGPR ? MCOperand::CreateImm(decodeRd(insn))
: MCOperand::CreateReg(
- getRegisterEnum(ARM::GPRRegClassID,
+ getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
MI.addOperand(OneCopOpc ? MCOperand::CreateReg(
- getRegisterEnum(ARM::GPRRegClassID,
+ getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn)))
: MCOperand::CreateImm(decodeRn(insn)));
}
// Branch Instructions.
-// BLr9: SignExtend(Imm24:'00', 32)
-// Bcc, BLr9_pred: SignExtend(Imm24:'00', 32) Pred0 Pred1
+// BL: SignExtend(Imm24:'00', 32)
+// Bcc, BL_pred: SignExtend(Imm24:'00', 32) Pred0 Pred1
// SMC: ZeroExtend(imm4, 32)
// SVC: ZeroExtend(Imm24, 32)
//
// MSR/MSRsys: Rm mask=Inst{19-16}
// BXJ: Rm
// MSRi/MSRsysi: so_imm
-// SRSW/SRS: addrmode4:$addr mode_imm
-// RFEW/RFE: addrmode4:$addr Rn
+// SRSW/SRS: ldstm_mode:$amode mode_imm
+// RFEW/RFE: ldstm_mode:$amode Rn
static bool DisassembleBrFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
if (CoprocessorOpcode(Opcode))
- return DisassembleCoprocessor(MI, Opcode, insn, NumOps, NumOpsAdded);
+ return DisassembleCoprocessor(MI, Opcode, insn, NumOps, NumOpsAdded, B);
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
+ if (!OpInfo) return false;
// MRS and MRSsys take one GPR reg Rd.
if (Opcode == ARM::MRS || Opcode == ARM::MRSsys) {
assert(NumOps >= 1 && OpInfo[0].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
NumOpsAdded = 1;
return true;
if (Opcode == ARM::BXJ) {
assert(NumOps >= 1 && OpInfo[0].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
NumOpsAdded = 1;
return true;
}
- // MSR and MSRsys take one GPR reg Rm, followed by the mask.
- if (Opcode == ARM::MSR || Opcode == ARM::MSRsys) {
- assert(NumOps >= 1 && OpInfo[0].RegClass == ARM::GPRRegClassID &&
+ // MSR take a mask, followed by one GPR reg Rm. The mask contains the R Bit in
+ // bit 4, and the special register fields in bits 3-0.
+ if (Opcode == ARM::MSR) {
+ assert(NumOps >= 1 && OpInfo[1].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 22, 22) << 4 /* R Bit */ |
+ slice(insn, 19, 16) /* Special Reg */ ));
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
- MI.addOperand(MCOperand::CreateImm(slice(insn, 19, 16)));
NumOpsAdded = 2;
return true;
}
- // MSRi and MSRsysi take one so_imm operand, followed by the mask.
- if (Opcode == ARM::MSRi || Opcode == ARM::MSRsysi) {
+ // MSRi take a mask, followed by one so_imm operand. The mask contains the
+ // R Bit in bit 4, and the special register fields in bits 3-0.
+ if (Opcode == ARM::MSRi) {
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 22, 22) << 4 /* R Bit */ |
+ slice(insn, 19, 16) /* Special Reg */ ));
// SOImm is 4-bit rotate amount in bits 11-8 with 8-bit imm in bits 7-0.
// A5.2.4 Rotate amount is twice the numeric value of Inst{11-8}.
// See also ARMAddressingModes.h: getSOImmValImm() and getSOImmValRot().
unsigned Rot = (insn >> ARMII::SoRotImmShift) & 0xF;
unsigned Imm = insn & 0xFF;
MI.addOperand(MCOperand::CreateImm(ARM_AM::rotr32(Imm, 2*Rot)));
- MI.addOperand(MCOperand::CreateImm(slice(insn, 19, 16)));
NumOpsAdded = 2;
return true;
}
- // SRSW and SRS requires addrmode4:$addr for ${addr:submode}, followed by the
- // mode immediate (Inst{4-0}).
if (Opcode == ARM::SRSW || Opcode == ARM::SRS ||
Opcode == ARM::RFEW || Opcode == ARM::RFE) {
- // ARMInstPrinter::printAddrMode4Operand() prints special mode string
- // if the base register is SP; so don't set ARM::SP.
- MI.addOperand(MCOperand::CreateReg(0));
ARM_AM::AMSubMode SubMode = getAMSubModeForBits(getPUBits(insn));
MI.addOperand(MCOperand::CreateImm(ARM_AM::getAM4ModeImm(SubMode)));
if (Opcode == ARM::SRSW || Opcode == ARM::SRS)
MI.addOperand(MCOperand::CreateImm(slice(insn, 4, 0)));
else
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
NumOpsAdded = 3;
return true;
}
- assert((Opcode == ARM::Bcc || Opcode == ARM::BLr9 || Opcode == ARM::BLr9_pred
+ assert((Opcode == ARM::Bcc || Opcode == ARM::BL || Opcode == ARM::BL_pred
|| Opcode == ARM::SMC || Opcode == ARM::SVC) &&
"Unexpected Opcode");
- assert(NumOps >= 1 && OpInfo[0].RegClass == 0 && "Reg operand expected");
+ assert(NumOps >= 1 && OpInfo[0].RegClass < 0 && "Imm operand expected");
int Imm32 = 0;
if (Opcode == ARM::SMC) {
unsigned Imm26 = slice(insn, 23, 0) << 2;
//Imm32 = signextend<signed int, 26>(Imm26);
Imm32 = SignExtend32<26>(Imm26);
-
- // When executing an ARM instruction, PC reads as the address of the current
- // instruction plus 8. The assembler subtracts 8 from the difference
- // between the branch instruction and the target address, disassembler has
- // to add 8 to compensate.
- Imm32 += 8;
}
MI.addOperand(MCOperand::CreateImm(Imm32));
}
// Misc. Branch Instructions.
-// BR_JTadd, BR_JTr, BR_JTm
-// BLXr9, BXr9
-// BRIND, BX_RET
+// BLX, BLXi, BX
+// BX, BX_RET
static bool DisassembleBrMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
+ if (!OpInfo) return false;
+
unsigned &OpIdx = NumOpsAdded;
OpIdx = 0;
- // BX_RET has only two predicate operands, do an early return.
- if (Opcode == ARM::BX_RET)
+ // BX_RET and MOVPCLR have only two predicate operands; do an early return.
+ if (Opcode == ARM::BX_RET || Opcode == ARM::MOVPCLR)
return true;
- // BLXr9 and BRIND take one GPR reg.
- if (Opcode == ARM::BLXr9 || Opcode == ARM::BRIND) {
+ // BLX and BX take one GPR reg.
+ if (Opcode == ARM::BLX || Opcode == ARM::BLX_pred ||
+ Opcode == ARM::BX) {
assert(NumOps >= 1 && OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
OpIdx = 1;
return true;
}
- // BR_JTadd is an ADD with Rd = PC, (Rn, Rm) as the target and index regs.
- if (Opcode == ARM::BR_JTadd) {
- // InOperandList with GPR:$target and GPR:$idx regs.
-
- assert(NumOps == 4 && "Expect 4 operands");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRn(insn))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRm(insn))));
-
- // Fill in the two remaining imm operands to signify build completion.
- MI.addOperand(MCOperand::CreateImm(0));
- MI.addOperand(MCOperand::CreateImm(0));
-
- OpIdx = 4;
- return true;
- }
-
- // BR_JTr is a MOV with Rd = PC, and Rm as the source register.
- if (Opcode == ARM::BR_JTr) {
- // InOperandList with GPR::$target reg.
-
- assert(NumOps == 3 && "Expect 3 operands");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRm(insn))));
-
- // Fill in the two remaining imm operands to signify build completion.
- MI.addOperand(MCOperand::CreateImm(0));
- MI.addOperand(MCOperand::CreateImm(0));
-
- OpIdx = 3;
- return true;
- }
-
- // BR_JTm is an LDR with Rt = PC.
- if (Opcode == ARM::BR_JTm) {
- // This is the reg/reg form, with base reg followed by +/- reg shop imm.
- // See also ARMAddressingModes.h (Addressing Mode #2).
-
- assert(NumOps == 5 && getIBit(insn) == 1 && "Expect 5 operands && I-bit=1");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRn(insn))));
-
- ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
-
- // Disassemble the offset reg (Rm), shift type, and immediate shift length.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRm(insn))));
- // Inst{6-5} encodes the shift opcode.
- ARM_AM::ShiftOpc ShOp = getShiftOpcForBits(slice(insn, 6, 5));
- // Inst{11-7} encodes the imm5 shift amount.
- unsigned ShImm = slice(insn, 11, 7);
-
- // A8.4.1. Possible rrx or shift amount of 32...
- getImmShiftSE(ShOp, ShImm);
- MI.addOperand(MCOperand::CreateImm(
- ARM_AM::getAM2Opc(AddrOpcode, ShImm, ShOp)));
-
- // Fill in the two remaining imm operands to signify build completion.
- MI.addOperand(MCOperand::CreateImm(0));
- MI.addOperand(MCOperand::CreateImm(0));
-
- OpIdx = 5;
+ // BLXi takes imm32 (the PC offset).
+ if (Opcode == ARM::BLXi) {
+ assert(NumOps >= 1 && OpInfo[0].RegClass < 0 && "Imm operand expected");
+ // SignExtend(imm24:H:'0', 32) where imm24 = Inst{23-0} and H = Inst{24}.
+ unsigned Imm26 = slice(insn, 23, 0) << 2 | slice(insn, 24, 24) << 1;
+ int Imm32 = SignExtend32<26>(Imm26);
+ MI.addOperand(MCOperand::CreateImm(Imm32));
+ OpIdx = 1;
return true;
}
- assert(0 && "Unexpected BrMiscFrm Opcode");
return false;
}
-static inline uint32_t getBFCInvMask(uint32_t insn) {
+static inline bool getBFCInvMask(uint32_t insn, uint32_t &mask) {
uint32_t lsb = slice(insn, 11, 7);
uint32_t msb = slice(insn, 20, 16);
uint32_t Val = 0;
- assert(lsb <= msb && "Encoding error: lsb > msb");
- for (uint32_t i = lsb; i <= msb; ++i)
- Val |= (1 << i);
- return ~Val;
-}
-
-static inline bool SaturateOpcode(unsigned Opcode) {
- switch (Opcode) {
- case ARM::SSATlsl: case ARM::SSATasr: case ARM::SSAT16:
- case ARM::USATlsl: case ARM::USATasr: case ARM::USAT16:
- return true;
- default:
+ if (msb < lsb) {
+ DEBUG(errs() << "Encoding error: msb < lsb\n");
return false;
}
-}
-static inline unsigned decodeSaturatePos(unsigned Opcode, uint32_t insn) {
- switch (Opcode) {
- case ARM::SSATlsl:
- case ARM::SSATasr:
- return slice(insn, 20, 16) + 1;
- case ARM::SSAT16:
- return slice(insn, 19, 16) + 1;
- case ARM::USATlsl:
- case ARM::USATasr:
- return slice(insn, 20, 16);
- case ARM::USAT16:
- return slice(insn, 19, 16);
- default:
- assert(0 && "Invalid opcode passed in");
- return 0;
- }
+ for (uint32_t i = lsb; i <= msb; ++i)
+ Val |= (1 << i);
+ mask = ~Val;
+ return true;
}
// A major complication is the fact that some of the saturating add/subtract
// operations have Rd Rm Rn, instead of the "normal" Rd Rn Rm.
// They are QADD, QDADD, QDSUB, and QSUB.
static bool DisassembleDPFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
unsigned short NumDefs = TID.getNumDefs();
// Disassemble register def if there is one.
if (NumDefs && (OpInfo[OpIdx].RegClass == ARM::GPRRegClassID)) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
}
if (OpIdx >= NumOps)
return false;
- // SSAT/SSAT16/USAT/USAT16 has imm operand after Rd.
- if (SaturateOpcode(Opcode)) {
- MI.addOperand(MCOperand::CreateImm(decodeSaturatePos(Opcode, insn)));
-
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
- decodeRm(insn))));
-
- if (Opcode == ARM::SSAT16 || Opcode == ARM::USAT16) {
- OpIdx += 2;
- return true;
- }
-
- // For SSAT operand reg (Rm) has been disassembled above.
- // Now disassemble the shift amount.
-
- // Inst{11-7} encodes the imm5 shift amount.
- unsigned ShAmt = slice(insn, 11, 7);
-
- // A8.6.183. Possible ASR shift amount of 32...
- if (Opcode == ARM::SSATasr && ShAmt == 0)
- ShAmt = 32;
-
- MI.addOperand(MCOperand::CreateImm(ShAmt));
-
- OpIdx += 3;
- return true;
- }
-
// Special-case handling of BFC/BFI/SBFX/UBFX.
if (Opcode == ARM::BFC || Opcode == ARM::BFI) {
- // TIED_TO operand skipped for BFC and Inst{3-0} (Reg) for BFI.
- MI.addOperand(MCOperand::CreateReg(Opcode == ARM::BFC ? 0
- : getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(0));
+ if (Opcode == ARM::BFI) {
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
- MI.addOperand(MCOperand::CreateImm(getBFCInvMask(insn)));
+ ++OpIdx;
+ }
+ uint32_t mask = 0;
+ if (!getBFCInvMask(insn, mask))
+ return false;
+
+ MI.addOperand(MCOperand::CreateImm(mask));
OpIdx += 2;
return true;
}
if (Opcode == ARM::SBFX || Opcode == ARM::UBFX) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
MI.addOperand(MCOperand::CreateImm(slice(insn, 11, 7)));
MI.addOperand(MCOperand::CreateImm(slice(insn, 20, 16) + 1));
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::GPRRegClassID,
+ getRegisterEnum(B, ARM::GPRRegClassID,
RmRn ? decodeRm(insn) : decodeRn(insn))));
++OpIdx;
}
// routed here as well.
// assert(getIBit(insn) == 0 && "I_Bit != '0' reg/reg form");
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::GPRRegClassID,
+ getRegisterEnum(B, ARM::GPRRegClassID,
RmRn? decodeRn(insn) : decodeRm(insn))));
++OpIdx;
} else if (Opcode == ARM::MOVi16 || Opcode == ARM::MOVTi16) {
}
static bool DisassembleDPSoRegFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
unsigned short NumDefs = TID.getNumDefs();
// Disassemble register def if there is one.
if (NumDefs && (OpInfo[OpIdx].RegClass == ARM::GPRRegClassID)) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
}
if (!isUnary) {
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
assert((OpInfo[OpIdx].RegClass == ARM::GPRRegClassID) &&
(OpInfo[OpIdx+1].RegClass == ARM::GPRRegClassID) &&
- (OpInfo[OpIdx+2].RegClass == 0) &&
+ (OpInfo[OpIdx+2].RegClass < 0) &&
"Expect 3 reg operands");
// Register-controlled shifts have Inst{7} = 0 and Inst{4} = 1.
unsigned Rs = slice(insn, 4, 4);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
if (Rs) {
// Register-controlled shifts: [Rm, Rs, shift].
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRs(insn))));
// Inst{6-5} encodes the shift opcode.
ARM_AM::ShiftOpc ShOp = getShiftOpcForBits(slice(insn, 6, 5));
}
static bool DisassembleLdStFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, bool isStore) {
+ unsigned short NumOps, unsigned &NumOpsAdded, bool isStore, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
- unsigned short NumDefs = TID.getNumDefs();
bool isPrePost = isPrePostLdSt(TID.TSFlags);
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
+
unsigned &OpIdx = NumOpsAdded;
OpIdx = 0;
- assert(((!isStore && NumDefs > 0) || (isStore && (NumDefs == 0 || isPrePost)))
+ assert(((!isStore && TID.getNumDefs() > 0) ||
+ (isStore && (TID.getNumDefs() == 0 || isPrePost)))
&& "Invalid arguments");
// Operand 0 of a pre- and post-indexed store is the address base writeback.
if (isPrePost && isStore) {
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
if (isPrePost && !isStore) {
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
"Reg operand expected");
assert((!isPrePost || (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1))
&& "Index mode or tied_to operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
if (OpIdx + 1 >= NumOps)
return false;
- assert((OpInfo[OpIdx].RegClass == ARM::GPRRegClassID) &&
- (OpInfo[OpIdx+1].RegClass == 0) &&
- "Expect 1 reg operand followed by 1 imm operand");
-
ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
+ unsigned IndexMode =
+ (TID.TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift;
if (getIBit(insn) == 0) {
- MI.addOperand(MCOperand::CreateReg(0));
+ // For pre- and post-indexed case, add a reg0 operand (Addressing Mode #2).
+ // Otherwise, skip the reg operand since for addrmode_imm12, Rn has already
+ // been populated.
+ if (isPrePost) {
+ MI.addOperand(MCOperand::CreateReg(0));
+ OpIdx += 1;
+ }
- // Disassemble the 12-bit immediate offset.
unsigned Imm12 = slice(insn, 11, 0);
- unsigned Offset = ARM_AM::getAM2Opc(AddrOpcode, Imm12, ARM_AM::no_shift);
- MI.addOperand(MCOperand::CreateImm(Offset));
+ if (Opcode == ARM::LDRBi12 || Opcode == ARM::LDRi12 ||
+ Opcode == ARM::STRBi12 || Opcode == ARM::STRi12) {
+ // Disassemble the 12-bit immediate offset, which is the second operand in
+ // $addrmode_imm12 => (ops GPR:$base, i32imm:$offsimm).
+ int Offset = AddrOpcode == ARM_AM::add ? 1 * Imm12 : -1 * Imm12;
+ MI.addOperand(MCOperand::CreateImm(Offset));
+ } else {
+ // Disassemble the 12-bit immediate offset, which is the second operand in
+ // $am2offset => (ops GPR, i32imm).
+ unsigned Offset = ARM_AM::getAM2Opc(AddrOpcode, Imm12, ARM_AM::no_shift,
+ IndexMode);
+ MI.addOperand(MCOperand::CreateImm(Offset));
+ }
+ OpIdx += 1;
} else {
+ // The opcode ARM::LDRT actually corresponds to both Encoding A1 and A2 of
+ // A8.6.86 LDRT. So if Inst{4} != 0 while Inst{25} (getIBit(insn)) == 1,
+ // we should reject this insn as invalid.
+ //
+ // Ditto for LDRBT.
+ if ((Opcode == ARM::LDRT || Opcode == ARM::LDRBT) && (slice(insn,4,4) == 1))
+ return false;
+
// Disassemble the offset reg (Rm), shift type, and immediate shift length.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
// Inst{6-5} encodes the shift opcode.
ARM_AM::ShiftOpc ShOp = getShiftOpcForBits(slice(insn, 6, 5));
// A8.4.1. Possible rrx or shift amount of 32...
getImmShiftSE(ShOp, ShImm);
MI.addOperand(MCOperand::CreateImm(
- ARM_AM::getAM2Opc(AddrOpcode, ShImm, ShOp)));
+ ARM_AM::getAM2Opc(AddrOpcode, ShImm, ShOp, IndexMode)));
+ OpIdx += 2;
}
- OpIdx += 2;
return true;
}
static bool DisassembleLdFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- return DisassembleLdStFrm(MI, Opcode, insn, NumOps, NumOpsAdded, false);
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
+ return DisassembleLdStFrm(MI, Opcode, insn, NumOps, NumOpsAdded, false, B);
}
static bool DisassembleStFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- return DisassembleLdStFrm(MI, Opcode, insn, NumOps, NumOpsAdded, true);
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
+ return DisassembleLdStFrm(MI, Opcode, insn, NumOps, NumOpsAdded, true, B);
}
static bool HasDualReg(unsigned Opcode) {
case ARM::LDRD: case ARM::LDRD_PRE: case ARM::LDRD_POST:
case ARM::STRD: case ARM::STRD_PRE: case ARM::STRD_POST:
return true;
- }
+ }
}
static bool DisassembleLdStMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, bool isStore) {
+ unsigned short NumOps, unsigned &NumOpsAdded, bool isStore, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
- unsigned short NumDefs = TID.getNumDefs();
bool isPrePost = isPrePostLdSt(TID.TSFlags);
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
+
unsigned &OpIdx = NumOpsAdded;
OpIdx = 0;
- assert(((!isStore && NumDefs > 0) || (isStore && (NumDefs == 0 || isPrePost)))
+ assert(((!isStore && TID.getNumDefs() > 0) ||
+ (isStore && (TID.getNumDefs() == 0 || isPrePost)))
&& "Invalid arguments");
// Operand 0 of a pre- and post-indexed store is the address base writeback.
if (isPrePost && isStore) {
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
- // Fill in LDRD and STRD's second operand.
- if (DualReg) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ // Fill in LDRD and STRD's second operand, but only if it's offset mode OR we
+ // have a pre-or-post-indexed store operation.
+ if (DualReg && (!isPrePost || isStore)) {
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn) + 1)));
++OpIdx;
}
if (isPrePost && !isStore) {
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
assert(OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
"Reg operand expected");
assert((!isPrePost || (TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1))
- && "Index mode or tied_to operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ && "Offset mode or tied_to operand expected");
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
return false;
assert((OpInfo[OpIdx].RegClass == ARM::GPRRegClassID) &&
- (OpInfo[OpIdx+1].RegClass == 0) &&
+ (OpInfo[OpIdx+1].RegClass < 0) &&
"Expect 1 reg operand followed by 1 imm operand");
ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
+ unsigned IndexMode =
+ (TID.TSFlags & ARMII::IndexModeMask) >> ARMII::IndexModeShift;
if (getAM3IBit(insn) == 1) {
MI.addOperand(MCOperand::CreateReg(0));
// Disassemble the 8-bit immediate offset.
unsigned Imm4H = (insn >> ARMII::ImmHiShift) & 0xF;
unsigned Imm4L = insn & 0xF;
- unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, (Imm4H << 4) | Imm4L);
+ unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, (Imm4H << 4) | Imm4L,
+ IndexMode);
MI.addOperand(MCOperand::CreateImm(Offset));
} else {
// Disassemble the offset reg (Rm).
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
- unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, 0);
+ unsigned Offset = ARM_AM::getAM3Opc(AddrOpcode, 0, IndexMode);
MI.addOperand(MCOperand::CreateImm(Offset));
}
OpIdx += 2;
}
static bool DisassembleLdMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- return DisassembleLdStMiscFrm(MI, Opcode, insn, NumOps, NumOpsAdded, false);
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
+ return DisassembleLdStMiscFrm(MI, Opcode, insn, NumOps, NumOpsAdded, false,
+ B);
}
static bool DisassembleStMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- return DisassembleLdStMiscFrm(MI, Opcode, insn, NumOps, NumOpsAdded, true);
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
+ return DisassembleLdStMiscFrm(MI, Opcode, insn, NumOps, NumOpsAdded, true, B);
}
// The algorithm for disassembly of LdStMulFrm is different from others because
-// it explicitly populates the two predicate operands after operand 0 (the base)
-// and operand 1 (the AM4 mode imm). After operand 3, we need to populate the
-// reglist with each affected register encoded as an MCOperand.
+// it explicitly populates the two predicate operands after the base register.
+// After that, we need to populate the reglist with each affected register
+// encoded as an MCOperand.
static bool DisassembleLdStMulFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- assert(NumOps >= 5 && "LdStMulFrm expects NumOps >= 5");
+ assert(NumOps >= 4 && "LdStMulFrm expects NumOps >= 4");
+ NumOpsAdded = 0;
- unsigned &OpIdx = NumOpsAdded;
-
- OpIdx = 0;
-
- unsigned Base = getRegisterEnum(ARM::GPRRegClassID, decodeRn(insn));
+ unsigned Base = getRegisterEnum(B, ARM::GPRRegClassID, decodeRn(insn));
// Writeback to base, if necessary.
- if (Opcode == ARM::LDM_UPD || Opcode == ARM::STM_UPD) {
+ if (Opcode == ARM::LDMIA_UPD || Opcode == ARM::STMIA_UPD ||
+ Opcode == ARM::LDMDA_UPD || Opcode == ARM::STMDA_UPD ||
+ Opcode == ARM::LDMDB_UPD || Opcode == ARM::STMDB_UPD ||
+ Opcode == ARM::LDMIB_UPD || Opcode == ARM::STMIB_UPD) {
MI.addOperand(MCOperand::CreateReg(Base));
- ++OpIdx;
+ ++NumOpsAdded;
}
+ // Add the base register operand.
MI.addOperand(MCOperand::CreateReg(Base));
- ARM_AM::AMSubMode SubMode = getAMSubModeForBits(getPUBits(insn));
- MI.addOperand(MCOperand::CreateImm(ARM_AM::getAM4ModeImm(SubMode)));
-
// Handling the two predicate operands before the reglist.
int64_t CondVal = insn >> ARMII::CondShift;
MI.addOperand(MCOperand::CreateImm(CondVal == 0xF ? 0xE : CondVal));
MI.addOperand(MCOperand::CreateReg(ARM::CPSR));
- OpIdx += 4;
+ NumOpsAdded += 3;
// Fill the variadic part of reglist.
unsigned RegListBits = insn & ((1 << 16) - 1);
for (unsigned i = 0; i < 16; ++i) {
if ((RegListBits >> i) & 1) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
i)));
- ++OpIdx;
+ ++NumOpsAdded;
}
}
//
// SWP, SWPB: Rd Rm Rn
static bool DisassembleLdStExFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
+ if (!OpInfo) return false;
+
unsigned &OpIdx = NumOpsAdded;
OpIdx = 0;
bool isDW = (Opcode == ARM::LDREXD || Opcode == ARM::STREXD);
// Add the destination operand.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
// Store register Exclusive needs a source operand.
if (isStore) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
++OpIdx;
if (isDW) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn)+1)));
++OpIdx;
}
} else if (isDW) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn)+1)));
++OpIdx;
}
// Finally add the pointer operand.
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
// PKHBT, PKHTB: Rd Rn Rm , LSL/ASR #imm5
// RBIT, REV, REV16, REVSH: Rd Rm
static bool DisassembleArithMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned &OpIdx = NumOpsAdded;
bool ThreeReg = NumOps > 2 && OpInfo[2].RegClass == ARM::GPRRegClassID;
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
if (ThreeReg) {
assert(NumOps >= 4 && "Expect >= 4 operands");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
++OpIdx;
// If there is still an operand info left which is an immediate operand, add
// an additional imm5 LSL/ASR operand.
- if (ThreeReg && OpInfo[OpIdx].RegClass == 0
+ if (ThreeReg && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
// Extract the 5-bit immediate field Inst{11-7}.
unsigned ShiftAmt = (insn >> ARMII::ShiftShift) & 0x1F;
- MI.addOperand(MCOperand::CreateImm(ShiftAmt));
+ ARM_AM::ShiftOpc Opc = ARM_AM::no_shift;
+ if (Opcode == ARM::PKHBT)
+ Opc = ARM_AM::lsl;
+ else if (Opcode == ARM::PKHBT)
+ Opc = ARM_AM::asr;
+ getImmShiftSE(Opc, ShiftAmt);
+ MI.addOperand(MCOperand::CreateImm(ARM_AM::getSORegOpc(Opc, ShiftAmt)));
++OpIdx;
}
return true;
}
+/// DisassembleSatFrm - Disassemble saturate instructions:
+/// SSAT, SSAT16, USAT, and USAT16.
+static bool DisassembleSatFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
+
+ const TargetInstrDesc &TID = ARMInsts[Opcode];
+ NumOpsAdded = TID.getNumOperands() - 2; // ignore predicate operands
+
+ // Disassemble register def.
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
+ decodeRd(insn))));
+
+ unsigned Pos = slice(insn, 20, 16);
+ if (Opcode == ARM::SSAT || Opcode == ARM::SSAT16)
+ Pos += 1;
+ MI.addOperand(MCOperand::CreateImm(Pos));
+
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
+ decodeRm(insn))));
+
+ if (NumOpsAdded == 4) {
+ ARM_AM::ShiftOpc Opc = (slice(insn, 6, 6) != 0 ? ARM_AM::asr : ARM_AM::lsl);
+ // Inst{11-7} encodes the imm5 shift amount.
+ unsigned ShAmt = slice(insn, 11, 7);
+ if (ShAmt == 0) {
+ // A8.6.183. Possible ASR shift amount of 32...
+ if (Opc == ARM_AM::asr)
+ ShAmt = 32;
+ else
+ Opc = ARM_AM::no_shift;
+ }
+ MI.addOperand(MCOperand::CreateImm(ARM_AM::getSORegOpc(Opc, ShAmt)));
+ }
+ return true;
+}
+
// Extend instructions.
// SXT* and UXT*: Rd [Rn] Rm [rot_imm].
// The 2nd operand register is Rn and the 3rd operand regsiter is Rm for the
// three register operand form. Otherwise, Rn=0b1111 and only Rm is used.
static bool DisassembleExtFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned &OpIdx = NumOpsAdded;
bool ThreeReg = NumOps > 2 && OpInfo[2].RegClass == ARM::GPRRegClassID;
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
++OpIdx;
if (ThreeReg) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
++OpIdx;
}
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
++OpIdx;
// If there is still an operand info left which is an immediate operand, add
// an additional rotate immediate operand.
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
// Extract the 2-bit rotate field Inst{11-10}.
unsigned rot = (insn >> ARMII::ExtRotImmShift) & 3;
}
// A7.5.1
-#if 0
-static uint64_t VFPExpandImm(unsigned char byte, unsigned N) {
+static APInt VFPExpandImm(unsigned char byte, unsigned N) {
assert(N == 32 || N == 64);
uint64_t Result;
Result = (uint64_t)slice(byte, 7, 7) << 63 |
(uint64_t)slice(byte, 5, 0) << 48;
if (bit6)
- Result |= 0xffL << 54;
+ Result |= 0xffULL << 54;
else
- Result |= 0x1L << 62;
+ Result |= 0x1ULL << 62;
}
- return Result;
+ return APInt(N, Result);
}
-#endif
// VFP Unary Format Instructions:
//
// VCVTDS, VCVTSD: converts between double-precision and single-precision
// The rest of the instructions have homogeneous [VFP]Rd and [VFP]Rm registers.
static bool DisassembleVFPUnaryFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 1 && "VFPUnaryFrm expects NumOps >= 1");
bool isSP = (RegClass == ARM::SPRRegClassID);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClass, decodeVFPRd(insn, isSP))));
+ getRegisterEnum(B, RegClass, decodeVFPRd(insn, isSP))));
++OpIdx;
// Early return for compare with zero instructions.
isSP = (RegClass == ARM::SPRRegClassID);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClass, decodeVFPRm(insn, isSP))));
+ getRegisterEnum(B, RegClass, decodeVFPRm(insn, isSP))));
++OpIdx;
return true;
// InOperandList to that of the dst. As far as asm printing is concerned, this
// tied_to operand is simply skipped.
static bool DisassembleVFPBinaryFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 3 && "VFPBinaryFrm expects NumOps >= 3");
bool isSP = (RegClass == ARM::SPRRegClassID);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClass, decodeVFPRd(insn, isSP))));
+ getRegisterEnum(B, RegClass, decodeVFPRd(insn, isSP))));
++OpIdx;
// Skip tied_to operand constraint.
}
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClass, decodeVFPRn(insn, isSP))));
+ getRegisterEnum(B, RegClass, decodeVFPRn(insn, isSP))));
++OpIdx;
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClass, decodeVFPRm(insn, isSP))));
+ getRegisterEnum(B, RegClass, decodeVFPRm(insn, isSP))));
++OpIdx;
return true;
// A8.6.295 vcvt (floating-point <-> integer)
// Int to FP: VSITOD, VSITOS, VUITOD, VUITOS
// FP to Int: VTOSI[Z|R]D, VTOSI[Z|R]S, VTOUI[Z|R]D, VTOUI[Z|R]S
-//
+//
// A8.6.297 vcvt (floating-point and fixed-point)
// Dd|Sd Dd|Sd(TIED_TO) #fbits(= 16|32 - UInt(imm4:i))
static bool DisassembleVFPConv1Frm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 2 && "VFPConv1Frm expects NumOps >= 2");
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
bool SP = slice(insn, 8, 8) == 0; // A8.6.295 & A8.6.297
bool fixed_point = slice(insn, 17, 17) == 1; // A8.6.297
int size = slice(insn, 7, 7) == 0 ? 16 : 32;
int fbits = size - (slice(insn,3,0) << 1 | slice(insn,5,5));
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(RegClassID,
+ getRegisterEnum(B, RegClassID,
decodeVFPRd(insn, SP))));
assert(TID.getOperandConstraint(1, TOI::TIED_TO) != -1 &&
"Tied to operand expected");
MI.addOperand(MI.getOperand(0));
- assert(OpInfo[2].RegClass == 0 && !OpInfo[2].isPredicate() &&
+ assert(OpInfo[2].RegClass < 0 && !OpInfo[2].isPredicate() &&
!OpInfo[2].isOptionalDef() && "Imm operand expected");
MI.addOperand(MCOperand::CreateImm(fbits));
if (slice(insn, 18, 18) == 1) { // to_integer operation
d = decodeVFPRd(insn, true /* Is Single Precision */);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::SPRRegClassID, d)));
+ getRegisterEnum(B, ARM::SPRRegClassID, d)));
m = decodeVFPRm(insn, SP);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClassID, m)));
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, RegClassID, m)));
} else {
d = decodeVFPRd(insn, SP);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClassID, d)));
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, RegClassID, d)));
m = decodeVFPRm(insn, true /* Is Single Precision */);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::SPRRegClassID, m)));
+ getRegisterEnum(B, ARM::SPRRegClassID, m)));
}
NumOpsAdded = 2;
}
// VMOVRS - A8.6.330
// Rt => Rd; Sn => UInt(Vn:N)
static bool DisassembleVFPConv2Frm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 2 && "VFPConv2Frm expects NumOps >= 2");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
decodeVFPRn(insn, true))));
NumOpsAdded = 2;
return true;
// VMOVRRS - A8.6.331
// Rt => Rd; Rt2 => Rn; Sm => UInt(Vm:M); Sm1 = Sm+1
static bool DisassembleVFPConv3Frm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 3 && "VFPConv3Frm expects NumOps >= 3");
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned &OpIdx = NumOpsAdded;
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
OpIdx = 2;
if (OpInfo[OpIdx].RegClass == ARM::SPRRegClassID) {
unsigned Sm = decodeVFPRm(insn, true);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
Sm)));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
Sm+1)));
OpIdx += 2;
} else {
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::DPRRegClassID,
+ getRegisterEnum(B, ARM::DPRRegClassID,
decodeVFPRm(insn, false))));
++OpIdx;
}
// VMOVSR - A8.6.330
// Rt => Rd; Sn => UInt(Vn:N)
static bool DisassembleVFPConv4Frm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 2 && "VFPConv4Frm expects NumOps >= 2");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
decodeVFPRn(insn, true))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
NumOpsAdded = 2;
return true;
// VMOVRRS - A8.6.331
// Rt => Rd; Rt2 => Rn; Sm => UInt(Vm:M); Sm1 = Sm+1
static bool DisassembleVFPConv5Frm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 3 && "VFPConv5Frm expects NumOps >= 3");
if (OpInfo[OpIdx].RegClass == ARM::SPRRegClassID) {
unsigned Sm = decodeVFPRm(insn, true);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
Sm)));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::SPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::SPRRegClassID,
Sm+1)));
OpIdx += 2;
} else {
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(ARM::DPRRegClassID,
+ getRegisterEnum(B, ARM::DPRRegClassID,
decodeVFPRm(insn, false))));
++OpIdx;
}
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
OpIdx += 2;
return true;
// VFP Load/Store Instructions.
// VLDRD, VLDRS, VSTRD, VSTRS
static bool DisassembleVFPLdStFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
assert(NumOps >= 3 && "VFPLdStFrm expects NumOps >= 3");
- bool isSPVFP = (Opcode == ARM::VLDRS || Opcode == ARM::VSTRS) ? true : false;
+ bool isSPVFP = (Opcode == ARM::VLDRS || Opcode == ARM::VSTRS);
unsigned RegClassID = isSPVFP ? ARM::SPRRegClassID : ARM::DPRRegClassID;
// Extract Dd/Sd for operand 0.
unsigned RegD = decodeVFPRd(insn, isSPVFP);
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClassID, RegD)));
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, RegClassID, RegD)));
- unsigned Base = getRegisterEnum(ARM::GPRRegClassID, decodeRn(insn));
+ unsigned Base = getRegisterEnum(B, ARM::GPRRegClassID, decodeRn(insn));
MI.addOperand(MCOperand::CreateReg(Base));
// Next comes the AM5 Opcode.
}
// VFP Load/Store Multiple Instructions.
-// This is similar to the algorithm for LDM/STM in that operand 0 (the base) and
-// operand 1 (the AM5 mode imm) is followed by two predicate operands. It is
-// followed by a reglist of either DPR(s) or SPR(s).
+// We have an optional write back reg, the base, and two predicate operands.
+// It is then followed by a reglist of either DPR(s) or SPR(s).
//
// VLDMD[_UPD], VLDMS[_UPD], VSTMD[_UPD], VSTMS[_UPD]
static bool DisassembleVFPLdStMulFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- assert(NumOps >= 5 && "VFPLdStMulFrm expects NumOps >= 5");
+ assert(NumOps >= 4 && "VFPLdStMulFrm expects NumOps >= 4");
unsigned &OpIdx = NumOpsAdded;
OpIdx = 0;
- unsigned Base = getRegisterEnum(ARM::GPRRegClassID, decodeRn(insn));
+ unsigned Base = getRegisterEnum(B, ARM::GPRRegClassID, decodeRn(insn));
// Writeback to base, if necessary.
- if (Opcode == ARM::VLDMD_UPD || Opcode == ARM::VLDMS_UPD ||
- Opcode == ARM::VSTMD_UPD || Opcode == ARM::VSTMS_UPD) {
+ if (Opcode == ARM::VLDMDIA_UPD || Opcode == ARM::VLDMSIA_UPD ||
+ Opcode == ARM::VLDMDDB_UPD || Opcode == ARM::VLDMSDB_UPD ||
+ Opcode == ARM::VSTMDIA_UPD || Opcode == ARM::VSTMSIA_UPD ||
+ Opcode == ARM::VSTMDDB_UPD || Opcode == ARM::VSTMSDB_UPD) {
MI.addOperand(MCOperand::CreateReg(Base));
++OpIdx;
}
MI.addOperand(MCOperand::CreateReg(Base));
- // Next comes the AM5 Opcode.
- ARM_AM::AMSubMode SubMode = getAMSubModeForBits(getPUBits(insn));
- unsigned char Imm8 = insn & 0xFF;
- MI.addOperand(MCOperand::CreateImm(ARM_AM::getAM5Opc(SubMode, Imm8)));
-
// Handling the two predicate operands before the reglist.
int64_t CondVal = insn >> ARMII::CondShift;
MI.addOperand(MCOperand::CreateImm(CondVal == 0xF ? 0xE : CondVal));
MI.addOperand(MCOperand::CreateReg(ARM::CPSR));
- OpIdx += 4;
+ OpIdx += 3;
- bool isSPVFP = (Opcode == ARM::VLDMS || Opcode == ARM::VLDMS_UPD ||
- Opcode == ARM::VSTMS || Opcode == ARM::VSTMS_UPD) ? true : false;
+ bool isSPVFP = (Opcode == ARM::VLDMSIA ||
+ Opcode == ARM::VLDMSIA_UPD || Opcode == ARM::VLDMSDB_UPD ||
+ Opcode == ARM::VSTMSIA ||
+ Opcode == ARM::VSTMSIA_UPD || Opcode == ARM::VSTMSDB_UPD);
unsigned RegClassID = isSPVFP ? ARM::SPRRegClassID : ARM::DPRRegClassID;
// Extract Dd/Sd.
unsigned RegD = decodeVFPRd(insn, isSPVFP);
// Fill the variadic part of reglist.
+ unsigned char Imm8 = insn & 0xFF;
unsigned Regs = isSPVFP ? Imm8 : Imm8/2;
+
+ // Apply some sanity checks before proceeding.
+ if (Regs == 0 || (RegD + Regs) > 32 || (!isSPVFP && Regs > 16))
+ return false;
+
for (unsigned i = 0; i < Regs; ++i) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, RegClassID,
RegD + i)));
++OpIdx;
}
// FCONSTS (SPR and a VFPf32Imm operand)
// VMRS/VMSR (GPR operand)
static bool DisassembleVFPMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned &OpIdx = NumOpsAdded;
unsigned RegEnum = 0;
switch (OpInfo[0].RegClass) {
case ARM::DPRRegClassID:
- RegEnum = getRegisterEnum(ARM::DPRRegClassID, decodeVFPRd(insn, false));
+ RegEnum = getRegisterEnum(B, ARM::DPRRegClassID, decodeVFPRd(insn, false));
break;
case ARM::SPRRegClassID:
- RegEnum = getRegisterEnum(ARM::SPRRegClassID, decodeVFPRd(insn, true));
+ RegEnum = getRegisterEnum(B, ARM::SPRRegClassID, decodeVFPRd(insn, true));
break;
case ARM::GPRRegClassID:
- RegEnum = getRegisterEnum(ARM::GPRRegClassID, decodeRd(insn));
+ RegEnum = getRegisterEnum(B, ARM::GPRRegClassID, decodeRd(insn));
break;
default:
assert(0 && "Invalid reg class id");
++OpIdx;
// Extract/decode the f64/f32 immediate.
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
- // The asm syntax specifies the before-expanded <imm>.
- // Not VFPExpandImm(slice(insn,19,16) << 4 | slice(insn, 3, 0),
- // Opcode == ARM::FCONSTD ? 64 : 32)
- MI.addOperand(MCOperand::CreateImm(slice(insn,19,16)<<4 | slice(insn,3,0)));
+ // The asm syntax specifies the floating point value, not the 8-bit literal.
+ APInt immRaw = VFPExpandImm(slice(insn,19,16) << 4 | slice(insn, 3, 0),
+ Opcode == ARM::FCONSTD ? 64 : 32);
+ APFloat immFP = APFloat(immRaw, true);
+ double imm = Opcode == ARM::FCONSTD ? immFP.convertToDouble() :
+ immFP.convertToFloat();
+ MI.addOperand(MCOperand::CreateFPImm(imm));
+
++OpIdx;
}
// D = Inst{22}, Vd = Inst{15-12}
static unsigned decodeNEONRd(uint32_t insn) {
return ((insn >> ARMII::NEON_D_BitShift) & 1) << 4
- | (insn >> ARMII::NEON_RegRdShift) & ARMII::NEONRegMask;
+ | ((insn >> ARMII::NEON_RegRdShift) & ARMII::NEONRegMask);
}
// Extract/Decode NEON N/Vn:
// N = Inst{7}, Vn = Inst{19-16}
static unsigned decodeNEONRn(uint32_t insn) {
return ((insn >> ARMII::NEON_N_BitShift) & 1) << 4
- | (insn >> ARMII::NEON_RegRnShift) & ARMII::NEONRegMask;
+ | ((insn >> ARMII::NEON_RegRnShift) & ARMII::NEONRegMask);
}
// Extract/Decode NEON M/Vm:
// M = Inst{5}, Vm = Inst{3-0}
static unsigned decodeNEONRm(uint32_t insn) {
return ((insn >> ARMII::NEON_M_BitShift) & 1) << 4
- | (insn >> ARMII::NEON_RegRmShift) & ARMII::NEONRegMask;
+ | ((insn >> ARMII::NEON_RegRmShift) & ARMII::NEONRegMask);
}
namespace {
// imm3 = Inst{18-16}, imm4 = Inst{3-0}
// Ref: Table A7-15 Modified immediate values for Advanced SIMD instructions.
static uint64_t decodeN1VImm(uint32_t insn, ElemSize esize) {
+ unsigned char op = (insn >> 5) & 1;
unsigned char cmode = (insn >> 8) & 0xF;
unsigned char Imm8 = ((insn >> 24) & 1) << 7 |
((insn >> 16) & 7) << 4 |
(insn & 0xF);
- uint64_t Imm64 = 0;
-
- switch (esize) {
- case ESize8:
- Imm64 = Imm8;
- break;
- case ESize16:
- Imm64 = Imm8 << 8*(cmode >> 1 & 1);
- break;
- case ESize32: {
- if (cmode == 12)
- Imm64 = (Imm8 << 8) | 0xFF;
- else if (cmode == 13)
- Imm64 = (Imm8 << 16) | 0xFFFF;
- else {
- // Imm8 to be shifted left by how many bytes...
- Imm64 = Imm8 << 8*(cmode >> 1 & 3);
- }
- break;
- }
- case ESize64: {
- for (unsigned i = 0; i < 8; ++i)
- if ((Imm8 >> i) & 1)
- Imm64 |= 0xFF << 8*i;
- break;
- }
- default:
- assert(0 && "Unreachable code!");
- return 0;
- }
-
- return Imm64;
+ return (op << 12) | (cmode << 8) | Imm8;
}
// A8.6.339 VMUL, VMULL (by scalar)
//
// Correctly set VLD*/VST*'s TIED_TO GPR, as the asm printer needs it.
static bool DisassembleNLdSt0(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, bool Store, bool DblSpaced) {
+ unsigned short NumOps, unsigned &NumOpsAdded, bool Store, bool DblSpaced,
+ unsigned alignment, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
// LLVM Addressing Mode #6.
unsigned RmEnum = 0;
if (WB && Rm != 13)
- RmEnum = getRegisterEnum(ARM::GPRRegClassID, Rm);
+ RmEnum = getRegisterEnum(B, ARM::GPRRegClassID, Rm);
if (Store) {
// Consume possible WB, AddrMode6, possible increment reg, the DPR/QPR's,
"Reg operand expected");
if (WB) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
Rn)));
++OpIdx;
}
assert((OpIdx+1) < NumOps && OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
- OpInfo[OpIdx + 1].RegClass == 0 && "Addrmode #6 Operands expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ OpInfo[OpIdx + 1].RegClass < 0 && "Addrmode #6 Operands expected");
+ // addrmode6 := (ops GPR:$addr, i32imm)
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
Rn)));
- MI.addOperand(MCOperand::CreateImm(0)); // Alignment ignored?
+ MI.addOperand(MCOperand::CreateImm(alignment)); // Alignment
OpIdx += 2;
if (WB) {
"Reg operand expected");
RegClass = OpInfo[OpIdx].RegClass;
- while (OpIdx < NumOps && OpInfo[OpIdx].RegClass == RegClass) {
- if (Opcode >= ARM::VST1q16 && Opcode <= ARM::VST1q8)
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClass,Rd,true)));
- else
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClass,Rd)));
+ while (OpIdx < NumOps && (unsigned)OpInfo[OpIdx].RegClass == RegClass) {
+ MI.addOperand(MCOperand::CreateReg(
+ getRegisterEnum(B, RegClass, Rd)));
Rd += Inc;
++OpIdx;
}
// Handle possible lane index.
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
MI.addOperand(MCOperand::CreateImm(decodeLaneIndex(insn)));
++OpIdx;
// possible TIED_TO DPR/QPR's (ignored), then possible lane index.
RegClass = OpInfo[0].RegClass;
- while (OpIdx < NumOps && OpInfo[OpIdx].RegClass == RegClass) {
- if (Opcode >= ARM::VLD1q16 && Opcode <= ARM::VLD1q8)
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClass,Rd,true)));
- else
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClass,Rd)));
+ while (OpIdx < NumOps && (unsigned)OpInfo[OpIdx].RegClass == RegClass) {
+ MI.addOperand(MCOperand::CreateReg(
+ getRegisterEnum(B, RegClass, Rd)));
Rd += Inc;
++OpIdx;
}
if (WB) {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
Rn)));
++OpIdx;
}
assert((OpIdx+1) < NumOps && OpInfo[OpIdx].RegClass == ARM::GPRRegClassID &&
- OpInfo[OpIdx + 1].RegClass == 0 && "Addrmode #6 Operands expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ OpInfo[OpIdx + 1].RegClass < 0 && "Addrmode #6 Operands expected");
+ // addrmode6 := (ops GPR:$addr, i32imm)
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
Rn)));
- MI.addOperand(MCOperand::CreateImm(0)); // Alignment ignored?
+ MI.addOperand(MCOperand::CreateImm(alignment)); // Alignment
OpIdx += 2;
if (WB) {
++OpIdx;
}
- while (OpIdx < NumOps && OpInfo[OpIdx].RegClass == RegClass) {
+ while (OpIdx < NumOps && (unsigned)OpInfo[OpIdx].RegClass == RegClass) {
assert(TID.getOperandConstraint(OpIdx, TOI::TIED_TO) != -1 &&
"Tied to operand expected");
MI.addOperand(MCOperand::CreateReg(0));
}
// Handle possible lane index.
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
MI.addOperand(MCOperand::CreateImm(decodeLaneIndex(insn)));
++OpIdx;
}
}
+ // Accessing registers past the end of the NEON register file is not
+ // defined.
+ if (Rd > 32)
+ return false;
+
return true;
}
+// A8.6.308, A8.6.311, A8.6.314, A8.6.317.
+static bool Align4OneLaneInst(unsigned elem, unsigned size,
+ unsigned index_align, unsigned & alignment) {
+ unsigned bits = 0;
+ switch (elem) {
+ default:
+ return false;
+ case 1:
+ // A8.6.308
+ if (size == 0)
+ return slice(index_align, 0, 0) == 0;
+ else if (size == 1) {
+ bits = slice(index_align, 1, 0);
+ if (bits != 0 && bits != 1)
+ return false;
+ if (bits == 1)
+ alignment = 16;
+ return true;
+ } else if (size == 2) {
+ bits = slice(index_align, 2, 0);
+ if (bits != 0 && bits != 3)
+ return false;
+ if (bits == 3)
+ alignment = 32;
+ return true;;
+ }
+ return true;
+ case 2:
+ // A8.6.311
+ if (size == 0) {
+ if (slice(index_align, 0, 0) == 1)
+ alignment = 16;
+ return true;
+ } if (size == 1) {
+ if (slice(index_align, 0, 0) == 1)
+ alignment = 32;
+ return true;
+ } else if (size == 2) {
+ if (slice(index_align, 1, 1) != 0)
+ return false;
+ if (slice(index_align, 0, 0) == 1)
+ alignment = 64;
+ return true;;
+ }
+ return true;
+ case 3:
+ // A8.6.314
+ if (size == 0) {
+ if (slice(index_align, 0, 0) != 0)
+ return false;
+ return true;
+ } if (size == 1) {
+ if (slice(index_align, 0, 0) != 0)
+ return false;
+ return true;
+ return true;
+ } else if (size == 2) {
+ if (slice(index_align, 1, 0) != 0)
+ return false;
+ return true;;
+ }
+ return true;
+ case 4:
+ // A8.6.317
+ if (size == 0) {
+ if (slice(index_align, 0, 0) == 1)
+ alignment = 32;
+ return true;
+ } if (size == 1) {
+ if (slice(index_align, 0, 0) == 1)
+ alignment = 64;
+ return true;
+ } else if (size == 2) {
+ bits = slice(index_align, 1, 0);
+ if (bits == 3)
+ return false;
+ if (bits == 1)
+ alignment = 64;
+ else if (bits == 2)
+ alignment = 128;
+ return true;;
+ }
+ return true;
+ }
+}
+
// A7.7
// If L (Inst{21}) == 0, store instructions.
// Find out about double-spaced-ness of the Opcode and pass it on to
// DisassembleNLdSt0().
static bool DisassembleNLdSt(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const StringRef Name = ARMInsts[Opcode].Name;
bool DblSpaced = false;
+ // 0 represents standard alignment, i.e., unaligned data access.
+ unsigned alignment = 0;
if (Name.find("LN") != std::string::npos) {
// To one lane instructions.
// See, for example, 8.6.317 VLD4 (single 4-element structure to one lane).
+ unsigned elem = 0; // legal values: {1, 2, 3, 4}
+ if (Name.startswith("VST1") || Name.startswith("VLD1"))
+ elem = 1;
+
+ if (Name.startswith("VST2") || Name.startswith("VLD2"))
+ elem = 2;
+
+ if (Name.startswith("VST3") || Name.startswith("VLD3"))
+ elem = 3;
+
+ if (Name.startswith("VST4") || Name.startswith("VLD4"))
+ elem = 4;
+
+ // Utility function takes number of elements, size, and index_align.
+ if (!Align4OneLaneInst(elem,
+ slice(insn, 11, 10),
+ slice(insn, 7, 4),
+ alignment))
+ return false;
+
// <size> == 16 && Inst{5} == 1 --> DblSpaced = true
if (Name.endswith("16") || Name.endswith("16_UPD"))
DblSpaced = slice(insn, 5, 5) == 1;
// <size> == 32 && Inst{6} == 1 --> DblSpaced = true
if (Name.endswith("32") || Name.endswith("32_UPD"))
DblSpaced = slice(insn, 6, 6) == 1;
-
} else {
// Multiple n-element structures with type encoded as Inst{11-8}.
// See, for example, A8.6.316 VLD4 (multiple 4-element structures).
+ // Inst{5-4} encodes alignment.
+ switch (slice(insn, 5, 4)) {
+ default:
+ break;
+ case 1:
+ alignment = 64; break;
+ case 2:
+ alignment = 128; break;
+ case 3:
+ alignment = 256; break;
+ }
+
// n == 2 && type == 0b1001 -> DblSpaced = true
if (Name.startswith("VST2") || Name.startswith("VLD2"))
DblSpaced = slice(insn, 11, 8) == 9;
-
+
// n == 3 && type == 0b0101 -> DblSpaced = true
- if (Name.startswith("VST3") || Name.startswith("VLD3"))
+ if (Name.startswith("VST3") || Name.startswith("VLD3")) {
+ // A8.6.313 & A8.6.395
+ if (slice(insn, 7, 6) == 3 && slice(insn, 5, 5) == 1)
+ return false;
+
DblSpaced = slice(insn, 11, 8) == 5;
-
+ }
+
// n == 4 && type == 0b0001 -> DblSpaced = true
if (Name.startswith("VST4") || Name.startswith("VLD4"))
DblSpaced = slice(insn, 11, 8) == 1;
-
}
return DisassembleNLdSt0(MI, Opcode, insn, NumOps, NumOpsAdded,
- slice(insn, 21, 21) == 0, DblSpaced);
+ slice(insn, 21, 21) == 0, DblSpaced, alignment/8, B);
}
// VMOV (immediate)
// Qd/Dd imm
+// VBIC (immediate)
+// VORR (immediate)
+// Qd/Dd imm src(=Qd/Dd)
static bool DisassembleN1RegModImmFrm(MCInst &MI, unsigned Opcode,
- uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
assert(NumOps >= 2 &&
(OpInfo[0].RegClass == ARM::DPRRegClassID ||
OpInfo[0].RegClass == ARM::QPRRegClassID) &&
- (OpInfo[1].RegClass == 0) &&
+ (OpInfo[1].RegClass < 0) &&
"Expect 1 reg operand followed by 1 imm operand");
// Qd/Dd = Inst{22:15-12} => NEON Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[0].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[0].RegClass,
decodeNEONRd(insn))));
ElemSize esize = ESizeNA;
break;
case ARM::VMOVv4i16:
case ARM::VMOVv8i16:
+ case ARM::VMVNv4i16:
+ case ARM::VMVNv8i16:
+ case ARM::VBICiv4i16:
+ case ARM::VBICiv8i16:
+ case ARM::VORRiv4i16:
+ case ARM::VORRiv8i16:
esize = ESize16;
break;
case ARM::VMOVv2i32:
case ARM::VMOVv4i32:
+ case ARM::VMVNv2i32:
+ case ARM::VMVNv4i32:
+ case ARM::VBICiv2i32:
+ case ARM::VBICiv4i32:
+ case ARM::VORRiv2i32:
+ case ARM::VORRiv4i32:
esize = ESize32;
break;
case ARM::VMOVv1i64:
case ARM::VMOVv2i64:
esize = ESize64;
+ break;
default:
- assert(0 && "Unreachable code!");
+ assert(0 && "Unexpected opcode!");
return false;
}
MI.addOperand(MCOperand::CreateImm(decodeN1VImm(insn, esize)));
NumOpsAdded = 2;
+
+ // VBIC/VORRiv*i* variants have an extra $src = $Vd to be filled in.
+ if (NumOps >= 3 &&
+ (OpInfo[2].RegClass == ARM::DPRRegClassID ||
+ OpInfo[2].RegClass == ARM::QPRRegClassID)) {
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[0].RegClass,
+ decodeNEONRd(insn))));
+ NumOpsAdded += 1;
+ }
+
return true;
}
//
// Vector Move Long:
// Qd Dm
-//
+//
// Vector Move Narrow:
// Dd Qm
//
// Others
static bool DisassembleNVdVmOptImm(MCInst &MI, unsigned Opc, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, N2VFlag Flag = N2V_None) {
+ unsigned short NumOps, unsigned &NumOpsAdded, N2VFlag Flag, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opc];
const TargetOperandInfo *OpInfo = TID.OpInfo;
}
// Qd/Dd = Inst{22:15-12} => NEON Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[OpIdx].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[OpIdx].RegClass,
decodeNEONRd(insn))));
++OpIdx;
}
// Dm = Inst{5:3-0} => NEON Rm
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[OpIdx].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[OpIdx].RegClass,
decodeNEONRm(insn))));
++OpIdx;
}
// Add the imm operand, if required.
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
unsigned imm = 0xFFFFFFFF;
}
static bool DisassembleN2RegFrm(MCInst &MI, unsigned Opc, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- return DisassembleNVdVmOptImm(MI, Opc, insn, NumOps, NumOpsAdded);
+ return DisassembleNVdVmOptImm(MI, Opc, insn, NumOps, NumOpsAdded,
+ N2V_None, B);
}
static bool DisassembleNVCVTFrm(MCInst &MI, unsigned Opc, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
return DisassembleNVdVmOptImm(MI, Opc, insn, NumOps, NumOpsAdded,
- N2V_VectorConvert_Between_Float_Fixed);
+ N2V_VectorConvert_Between_Float_Fixed, B);
}
static bool DisassembleNVecDupLnFrm(MCInst &MI, unsigned Opc, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
return DisassembleNVdVmOptImm(MI, Opc, insn, NumOps, NumOpsAdded,
- N2V_VectorDupLane);
+ N2V_VectorDupLane, B);
}
// Vector Shift [Accumulate] Instructions.
// VSHLLi16, VSHLLi32, VSHLLi8: Qd Dm imm (== size)
//
static bool DisassembleNVectorShift(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, bool LeftShift) {
+ unsigned short NumOps, unsigned &NumOpsAdded, bool LeftShift, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
OpIdx = 0;
// Qd/Dd = Inst{22:15-12} => NEON Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[OpIdx].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[OpIdx].RegClass,
decodeNEONRd(insn))));
++OpIdx;
"Reg operand expected");
// Qm/Dm = Inst{5:3-0} => NEON Rm
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[OpIdx].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[OpIdx].RegClass,
decodeNEONRm(insn))));
++OpIdx;
- assert(OpInfo[OpIdx].RegClass == 0 && "Imm operand expected");
+ assert(OpInfo[OpIdx].RegClass < 0 && "Imm operand expected");
// Add the imm operand.
-
+
// VSHLL has maximum shift count as the imm, inferred from its size.
unsigned Imm;
switch (Opcode) {
// Left shift instructions.
static bool DisassembleN2RegVecShLFrm(MCInst &MI, unsigned Opcode,
- uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- return DisassembleNVectorShift(MI, Opcode, insn, NumOps, NumOpsAdded, true);
+ return DisassembleNVectorShift(MI, Opcode, insn, NumOps, NumOpsAdded, true,
+ B);
}
// Right shift instructions have different shift amount interpretation.
static bool DisassembleN2RegVecShRFrm(MCInst &MI, unsigned Opcode,
- uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- return DisassembleNVectorShift(MI, Opcode, insn, NumOps, NumOpsAdded, false);
+ return DisassembleNVectorShift(MI, Opcode, insn, NumOps, NumOpsAdded, false,
+ B);
}
namespace {
//
// Others
static bool DisassembleNVdVnVmOptImm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, N3VFlag Flag = N3V_None) {
+ unsigned short NumOps, unsigned &NumOpsAdded, N3VFlag Flag, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
}
// Qd/Dd = Inst{22:15-12} => NEON Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(OpInfo[OpIdx].RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, OpInfo[OpIdx].RegClass,
decodeNEONRd(insn))));
++OpIdx;
// or
// Dm = Inst{5:3-0} => NEON Rm
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(OpInfo[OpIdx].RegClass,
+ getRegisterEnum(B, OpInfo[OpIdx].RegClass,
VdVnVm ? decodeNEONRn(insn)
: decodeNEONRm(insn))));
++OpIdx;
// N3RegFrm.
if (Opcode == ARM::VMOVDneon || Opcode == ARM::VMOVQ)
return true;
-
+
// Dm = Inst{5:3-0} => NEON Rm
// or
// Dm is restricted to D0-D7 if size is 16, D0-D15 otherwise
: decodeNEONRn(insn);
MI.addOperand(MCOperand::CreateReg(
- getRegisterEnum(OpInfo[OpIdx].RegClass, m)));
+ getRegisterEnum(B, OpInfo[OpIdx].RegClass, m)));
++OpIdx;
- if (OpIdx < NumOps && OpInfo[OpIdx].RegClass == 0
+ if (OpIdx < NumOps && OpInfo[OpIdx].RegClass < 0
&& !OpInfo[OpIdx].isPredicate() && !OpInfo[OpIdx].isOptionalDef()) {
// Add the imm operand.
unsigned Imm = 0;
}
static bool DisassembleN3RegFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- return DisassembleNVdVnVmOptImm(MI, Opcode, insn, NumOps, NumOpsAdded);
+ return DisassembleNVdVnVmOptImm(MI, Opcode, insn, NumOps, NumOpsAdded,
+ N3V_None, B);
}
static bool DisassembleN3RegVecShFrm(MCInst &MI, unsigned Opcode,
- uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
return DisassembleNVdVnVmOptImm(MI, Opcode, insn, NumOps, NumOpsAdded,
- N3V_VectorShift);
+ N3V_VectorShift, B);
}
-static bool DisassembleNVecExtractFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+static bool DisassembleNVecExtractFrm(MCInst &MI, unsigned Opcode,
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
return DisassembleNVdVnVmOptImm(MI, Opcode, insn, NumOps, NumOpsAdded,
- N3V_VectorExtract);
+ N3V_VectorExtract, B);
}
static bool DisassembleNVecMulScalarFrm(MCInst &MI, unsigned Opcode,
- uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ uint32_t insn, unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
return DisassembleNVdVnVmOptImm(MI, Opcode, insn, NumOps, NumOpsAdded,
- N3V_Multiply_By_Scalar);
+ N3V_Multiply_By_Scalar, B);
}
// Vector Table Lookup
// VTBL3, VTBX3: Dd [Dd(TIED_TO)] Dn Dn+1 Dn+2 Dm
// VTBL4, VTBX4: Dd [Dd(TIED_TO)] Dn Dn+1 Dn+2 Dn+3 Dm
static bool DisassembleNVTBLFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
assert(NumOps >= 3 &&
OpInfo[0].RegClass == ARM::DPRRegClassID &&
unsigned Len = slice(insn, 9, 8) + 1;
// Dd (the destination vector)
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::DPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::DPRRegClassID,
decodeNEONRd(insn))));
++OpIdx;
for (unsigned i = 0; i < Len; ++i) {
assert(OpIdx < NumOps && OpInfo[OpIdx].RegClass == ARM::DPRRegClassID &&
"Reg operand expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::DPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::DPRRegClassID,
Rn + i)));
++OpIdx;
}
// Dm (the index vector)
assert(OpIdx < NumOps && OpInfo[OpIdx].RegClass == ARM::DPRRegClassID &&
"Reg operand (index vector) expected");
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::DPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::DPRRegClassID,
decodeNEONRm(insn))));
++OpIdx;
return true;
}
-static bool DisassembleNEONFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
- assert(0 && "Unreachable code!");
- return false;
-}
-
// Vector Get Lane (move scalar to ARM core register) Instructions.
// VGETLNi32, VGETLNs16, VGETLNs8, VGETLNu16, VGETLNu8: Rt Dn index
-static bool DisassembleNEONGetLnFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+static bool DisassembleNGetLnFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
- unsigned short NumDefs = TID.getNumDefs();
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
- assert(NumDefs == 1 && NumOps >= 3 &&
+ assert(TID.getNumDefs() == 1 && NumOps >= 3 &&
OpInfo[0].RegClass == ARM::GPRRegClassID &&
OpInfo[1].RegClass == ARM::DPRRegClassID &&
- OpInfo[2].RegClass == 0 &&
+ OpInfo[2].RegClass < 0 &&
"Expect >= 3 operands with one dst operand");
ElemSize esize =
: ESize32);
// Rt = Inst{15-12} => ARM Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
// Dn = Inst{7:19-16} => NEON Rn
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::DPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::DPRRegClassID,
decodeNEONRn(insn))));
MI.addOperand(MCOperand::CreateImm(decodeNVLaneOpIndex(insn, esize)));
// Vector Set Lane (move ARM core register to scalar) Instructions.
// VSETLNi16, VSETLNi32, VSETLNi8: Dd Dd (TIED_TO) Rt index
-static bool DisassembleNEONSetLnFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+static bool DisassembleNSetLnFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetInstrDesc &TID = ARMInsts[Opcode];
- unsigned short NumDefs = TID.getNumDefs();
const TargetOperandInfo *OpInfo = TID.OpInfo;
+ if (!OpInfo) return false;
- assert(NumDefs == 1 && NumOps >= 3 &&
+ assert(TID.getNumDefs() == 1 && NumOps >= 3 &&
OpInfo[0].RegClass == ARM::DPRRegClassID &&
OpInfo[1].RegClass == ARM::DPRRegClassID &&
TID.getOperandConstraint(1, TOI::TIED_TO) != -1 &&
OpInfo[2].RegClass == ARM::GPRRegClassID &&
- OpInfo[3].RegClass == 0 &&
+ OpInfo[3].RegClass < 0 &&
"Expect >= 3 operands with one dst operand");
ElemSize esize =
: ESize32);
// Dd = Inst{7:19-16} => NEON Rn
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::DPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::DPRRegClassID,
decodeNEONRn(insn))));
// TIED_TO operand.
MI.addOperand(MCOperand::CreateReg(0));
// Rt = Inst{15-12} => ARM Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
MI.addOperand(MCOperand::CreateImm(decodeNVLaneOpIndex(insn, esize)));
// Vector Duplicate Instructions (from ARM core register to all elements).
// VDUP8d, VDUP16d, VDUP32d, VDUP8q, VDUP16q, VDUP32q: Qd/Dd Rt
-static bool DisassembleNEONDupFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+static bool DisassembleNDupFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
unsigned RegClass = OpInfo[0].RegClass;
// Qd/Dd = Inst{7:19-16} => NEON Rn
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(RegClass,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, RegClass,
decodeNEONRn(insn))));
// Rt = Inst{15-12} => ARM Rd
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRd(insn))));
NumOpsAdded = 2;
// A8.6.49 ISB
static inline bool MemBarrierInstr(uint32_t insn) {
unsigned op7_4 = slice(insn, 7, 4);
- if (slice(insn, 31, 20) == 0xf57 && (op7_4 >= 4 && op7_4 <= 6))
+ if (slice(insn, 31, 8) == 0xf57ff0 && (op7_4 >= 4 && op7_4 <= 6))
return true;
return false;
static inline bool PreLoadOpcode(unsigned Opcode) {
switch(Opcode) {
- case ARM::PLDi: case ARM::PLDr:
- case ARM::PLDWi: case ARM::PLDWr:
- case ARM::PLIi: case ARM::PLIr:
+ case ARM::PLDi12: case ARM::PLDrs:
+ case ARM::PLDWi12: case ARM::PLDWrs:
+ case ARM::PLIi12: case ARM::PLIrs:
return true;
default:
return false;
}
static bool DisassemblePreLoadFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- // Preload Data/Instruction requires either 2 or 4 operands.
- // PLDi, PLDWi, PLIi: Rn [+/-]imm12 add = (U == '1')
- // PLDr[a|m], PLDWr[a|m], PLIr[a|m]: Rn Rm addrmode2_opc
+ // Preload Data/Instruction requires either 2 or 3 operands.
+ // PLDi12, PLDWi12, PLIi12: addrmode_imm12
+ // PLDrs, PLDWrs, PLIrs: ldst_so_reg
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRn(insn))));
- if (Opcode == ARM::PLDi || Opcode == ARM::PLDWi || Opcode == ARM::PLIi) {
+ if (Opcode == ARM::PLDi12 || Opcode == ARM::PLDWi12
+ || Opcode == ARM::PLIi12) {
unsigned Imm12 = slice(insn, 11, 0);
bool Negative = getUBit(insn) == 0;
- int Offset = Negative ? -1 - Imm12 : 1 * Imm12;
+
+ // A8.6.118 PLD (literal) PLDWi12 with Rn=PC is transformed to PLDi12.
+ if (Opcode == ARM::PLDWi12 && slice(insn, 19, 16) == 0xF) {
+ DEBUG(errs() << "Rn == '1111': PLDWi12 morphed to PLDi12\n");
+ MI.setOpcode(ARM::PLDi12);
+ }
+
+ // -0 is represented specially. All other values are as normal.
+ int Offset = Negative ? -1 * Imm12 : Imm12;
+ if (Imm12 == 0 && Negative)
+ Offset = INT32_MIN;
+
MI.addOperand(MCOperand::CreateImm(Offset));
NumOpsAdded = 2;
} else {
- MI.addOperand(MCOperand::CreateReg(getRegisterEnum(ARM::GPRRegClassID,
+ MI.addOperand(MCOperand::CreateReg(getRegisterEnum(B, ARM::GPRRegClassID,
decodeRm(insn))));
ARM_AM::AddrOpc AddrOpcode = getUBit(insn) ? ARM_AM::add : ARM_AM::sub;
}
static bool DisassembleMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
+ unsigned short NumOps, unsigned &NumOpsAdded, BO B) {
- if (MemBarrierInstr(insn))
+ if (MemBarrierInstr(insn)) {
+ // DMBsy, DSBsy, and ISBsy instructions have zero operand and are taken care
+ // of within the generic ARMBasicMCBuilder::BuildIt() method.
+ //
+ // Inst{3-0} encodes the memory barrier option for the variants.
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 3, 0)));
+ NumOpsAdded = 1;
return true;
+ }
switch (Opcode) {
case ARM::CLREX:
case ARM::WFE:
case ARM::WFI:
case ARM::SEV:
- case ARM::SETENDBE:
- case ARM::SETENDLE:
return true;
+ case ARM::SWP:
+ case ARM::SWPB:
+ // SWP, SWPB: Rd Rm Rn
+ // Delegate to DisassembleLdStExFrm()....
+ return DisassembleLdStExFrm(MI, Opcode, insn, NumOps, NumOpsAdded, B);
default:
break;
}
- // CPS has a singleton $opt operand that contains the following information:
- // opt{4-0} = mode from Inst{4-0}
- // opt{5} = changemode from Inst{17}
- // opt{8-6} = AIF from Inst{8-6}
- // opt{10-9} = imod from Inst{19-18} with 0b10 as enable and 0b11 as disable
- if (Opcode == ARM::CPS) {
- unsigned Option = slice(insn, 4, 0) | slice(insn, 17, 17) << 5 |
- slice(insn, 8, 6) << 6 | slice(insn, 19, 18) << 9;
- MI.addOperand(MCOperand::CreateImm(Option));
+ if (Opcode == ARM::SETEND) {
+ NumOpsAdded = 1;
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 9, 9)));
+ return true;
+ }
+
+ // FIXME: To enable correct asm parsing and disasm of CPS we need 3 different
+ // opcodes which match the same real instruction. This is needed since there's
+ // no current handling of optional arguments. Fix here when a better handling
+ // of optional arguments is implemented.
+ if (Opcode == ARM::CPS3p) { // M = 1
+ // Let's reject these impossible imod values by returning false:
+ // 1. (imod=0b01)
+ //
+ // AsmPrinter cannot handle imod=0b00, plus (imod=0b00,M=1,iflags!=0) is an
+ // invalid combination, so we just check for imod=0b00 here.
+ if (slice(insn, 19, 18) == 0 || slice(insn, 19, 18) == 1)
+ return false;
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 19, 18))); // imod
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 8, 6))); // iflags
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 4, 0))); // mode
+ NumOpsAdded = 3;
+ return true;
+ }
+ if (Opcode == ARM::CPS2p) { // mode = 0, M = 0
+ // Let's reject these impossible imod values by returning false:
+ // 1. (imod=0b00,M=0)
+ // 2. (imod=0b01)
+ if (slice(insn, 19, 18) == 0 || slice(insn, 19, 18) == 1)
+ return false;
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 19, 18))); // imod
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 8, 6))); // iflags
+ NumOpsAdded = 2;
+ return true;
+ }
+ if (Opcode == ARM::CPS1p) { // imod = 0, iflags = 0, M = 1
+ MI.addOperand(MCOperand::CreateImm(slice(insn, 4, 0))); // mode
NumOpsAdded = 1;
return true;
}
}
if (PreLoadOpcode(Opcode))
- return DisassemblePreLoadFrm(MI, Opcode, insn, NumOps, NumOpsAdded);
+ return DisassemblePreLoadFrm(MI, Opcode, insn, NumOps, NumOpsAdded, B);
assert(0 && "Unexpected misc instruction!");
return false;
}
-static bool DisassembleThumbMiscFrm(MCInst &MI, unsigned Opcode, uint32_t insn,
- unsigned short NumOps, unsigned &NumOpsAdded, BO) {
-
- assert(0 && "Unexpected thumb misc. instruction!");
- return false;
-}
-
/// FuncPtrs - FuncPtrs maps ARMFormat to its corresponding DisassembleFP.
/// We divide the disassembly task into different categories, with each one
/// corresponding to a specific instruction encoding format. There could be
&DisassembleLdStMulFrm,
&DisassembleLdStExFrm,
&DisassembleArithMiscFrm,
+ &DisassembleSatFrm,
&DisassembleExtFrm,
&DisassembleVFPUnaryFrm,
&DisassembleVFPBinaryFrm,
&DisassembleVFPLdStMulFrm,
&DisassembleVFPMiscFrm,
&DisassembleThumbFrm,
- &DisassembleNEONFrm,
- &DisassembleNEONGetLnFrm,
- &DisassembleNEONSetLnFrm,
- &DisassembleNEONDupFrm,
&DisassembleMiscFrm,
- &DisassembleThumbMiscFrm,
+ &DisassembleNGetLnFrm,
+ &DisassembleNSetLnFrm,
+ &DisassembleNDupFrm,
// VLD and VST (including one lane) Instructions.
&DisassembleNLdSt,
unsigned NumOpsAdded = 0;
bool OK = (*Disasm)(MI, Opcode, insn, NumOps, NumOpsAdded, this);
- if (!OK) return false;
+ if (!OK || this->Err != 0) return false;
if (NumOpsAdded >= NumOps)
return true;
return TryPredicateAndSBitModifier(MI, Opcode, insn, NumOps - NumOpsAdded);
}
+// A8.3 Conditional execution
+// A8.3.1 Pseudocode details of conditional execution
+// Condition bits '111x' indicate the instruction is always executed.
+static uint32_t CondCode(uint32_t CondField) {
+ if (CondField == 0xF)
+ return ARMCC::AL;
+ return CondField;
+}
+
+/// DoPredicateOperands - DoPredicateOperands process the predicate operands
+/// of some Thumb instructions which come before the reglist operands. It
+/// returns true if the two predicate operands have been processed.
+bool ARMBasicMCBuilder::DoPredicateOperands(MCInst& MI, unsigned Opcode,
+ uint32_t /* insn */, unsigned short NumOpsRemaining) {
+
+ assert(NumOpsRemaining > 0 && "Invalid argument");
+
+ const TargetOperandInfo *OpInfo = ARMInsts[Opcode].OpInfo;
+ unsigned Idx = MI.getNumOperands();
+
+ // First, we check whether this instr specifies the PredicateOperand through
+ // a pair of TargetOperandInfos with isPredicate() property.
+ if (NumOpsRemaining >= 2 &&
+ OpInfo[Idx].isPredicate() && OpInfo[Idx+1].isPredicate() &&
+ OpInfo[Idx].RegClass < 0 &&
+ OpInfo[Idx+1].RegClass == ARM::CCRRegClassID)
+ {
+ // If we are inside an IT block, get the IT condition bits maintained via
+ // ARMBasicMCBuilder::ITState[7:0], through ARMBasicMCBuilder::GetITCond().
+ // See also A2.5.2.
+ if (InITBlock())
+ MI.addOperand(MCOperand::CreateImm(GetITCond()));
+ else
+ MI.addOperand(MCOperand::CreateImm(ARMCC::AL));
+ MI.addOperand(MCOperand::CreateReg(ARM::CPSR));
+ return true;
+ }
+
+ return false;
+}
+
+/// TryPredicateAndSBitModifier - TryPredicateAndSBitModifier tries to process
+/// the possible Predicate and SBitModifier, to build the remaining MCOperand
+/// constituents.
bool ARMBasicMCBuilder::TryPredicateAndSBitModifier(MCInst& MI, unsigned Opcode,
uint32_t insn, unsigned short NumOpsRemaining) {
// a pair of TargetOperandInfos with isPredicate() property.
if (NumOpsRemaining >= 2 &&
OpInfo[Idx].isPredicate() && OpInfo[Idx+1].isPredicate() &&
- OpInfo[Idx].RegClass == 0 && OpInfo[Idx+1].RegClass == ARM::CCRRegClassID)
+ OpInfo[Idx].RegClass < 0 &&
+ OpInfo[Idx+1].RegClass == ARM::CCRRegClassID)
{
// If we are inside an IT block, get the IT condition bits maintained via
// ARMBasicMCBuilder::ITState[7:0], through ARMBasicMCBuilder::GetITCond().
//
// A8.6.16 B
if (Name == "t2Bcc")
- MI.addOperand(MCOperand::CreateImm(slice(insn, 25, 22)));
+ MI.addOperand(MCOperand::CreateImm(CondCode(slice(insn, 25, 22))));
else if (Name == "tBcc")
- MI.addOperand(MCOperand::CreateImm(slice(insn, 11, 8)));
+ MI.addOperand(MCOperand::CreateImm(CondCode(slice(insn, 11, 8))));
else
MI.addOperand(MCOperand::CreateImm(ARMCC::AL));
} else {
- // ARM Instructions. Check condition field.
- int64_t CondVal = getCondField(insn);
- if (CondVal == 0xF)
- MI.addOperand(MCOperand::CreateImm(ARMCC::AL));
- else
- MI.addOperand(MCOperand::CreateImm(CondVal));
+ // ARM instructions get their condition field from Inst{31-28}.
+ MI.addOperand(MCOperand::CreateImm(CondCode(getCondField(insn))));
}
}
MI.addOperand(MCOperand::CreateReg(ARM::CPSR));
Idx += 2;
NumOpsRemaining -= 2;
- if (NumOpsRemaining == 0)
- return true;
}
+ if (NumOpsRemaining == 0)
+ return true;
+
// Next, if OptionalDefOperand exists, we check whether the 'S' bit is set.
if (OpInfo[Idx].isOptionalDef() && OpInfo[Idx].RegClass==ARM::CCRRegClassID) {
MI.addOperand(MCOperand::CreateReg(getSBit(insn) == 1 ? ARM::CPSR : 0));
if (!SP) return Status;
if (Opcode == ARM::t2IT)
- SP->InitIT(slice(insn, 7, 0));
+ Status = SP->InitIT(slice(insn, 7, 0)) ? Status : false;
else if (InITBlock())
SP->UpdateIT();
/// Opcode, Format, and NumOperands make up an ARM Basic MCBuilder.
ARMBasicMCBuilder::ARMBasicMCBuilder(unsigned opc, ARMFormat format,
unsigned short num)
- : Opcode(opc), Format(format), NumOps(num), SP(0) {
+ : Opcode(opc), Format(format), NumOps(num), SP(0), Err(0) {
unsigned Idx = (unsigned)format;
assert(Idx < (array_lengthof(FuncPtrs) - 1) && "Unknown format");
Disasm = FuncPtrs[Idx];
/// are responsible for freeing up of the allocated memory. Cacheing can be
/// performed by the API clients to improve performance.
ARMBasicMCBuilder *llvm::CreateMCBuilder(unsigned Opcode, ARMFormat Format) {
+ // For "Unknown format", fail by returning a NULL pointer.
+ if ((unsigned)Format >= (array_lengthof(FuncPtrs) - 1)) {
+ DEBUG(errs() << "Unknown format\n");
+ return 0;
+ }
return new ARMBasicMCBuilder(Opcode, Format,
ARMInsts[Opcode].getNumOperands());
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