#include "Mips.h"
#include "MipsRegisterInfo.h"
#include "MipsSubtarget.h"
+#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCDisassembler.h"
#include "llvm/MC/MCFixedLenDisassembler.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/Support/MathExtras.h"
-#include "llvm/Support/MemoryObject.h"
#include "llvm/Support/TargetRegistry.h"
using namespace llvm;
+#define DEBUG_TYPE "mips-disassembler"
+
typedef MCDisassembler::DecodeStatus DecodeStatus;
namespace {
-/// MipsDisassemblerBase - a disasembler class for Mips.
-class MipsDisassemblerBase : public MCDisassembler {
+class MipsDisassembler : public MCDisassembler {
+ bool IsMicroMips;
+ bool IsBigEndian;
public:
- /// Constructor - Initializes the disassembler.
- ///
- MipsDisassemblerBase(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
- bool bigEndian) :
- MCDisassembler(STI), RegInfo(Info), isBigEndian(bigEndian) {}
-
- virtual ~MipsDisassemblerBase() {}
-
- const MCRegisterInfo *getRegInfo() const { return RegInfo.get(); }
+ MipsDisassembler(const MCSubtargetInfo &STI, MCContext &Ctx, bool IsBigEndian)
+ : MCDisassembler(STI, Ctx),
+ IsMicroMips(STI.getFeatureBits()[Mips::FeatureMicroMips]),
+ IsBigEndian(IsBigEndian) {}
+
+ bool hasMips3() const { return STI.getFeatureBits()[Mips::FeatureMips3]; }
+ bool hasMips32() const { return STI.getFeatureBits()[Mips::FeatureMips32]; }
+ bool hasMips32r6() const {
+ return STI.getFeatureBits()[Mips::FeatureMips32r6];
+ }
-private:
- OwningPtr<const MCRegisterInfo> RegInfo;
-protected:
- bool isBigEndian;
-};
+ bool isGP64() const { return STI.getFeatureBits()[Mips::FeatureGP64Bit]; }
-/// MipsDisassembler - a disasembler class for Mips32.
-class MipsDisassembler : public MipsDisassemblerBase {
-public:
- /// Constructor - Initializes the disassembler.
- ///
- MipsDisassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
- bool bigEndian) :
- MipsDisassemblerBase(STI, Info, bigEndian) {}
-
- /// getInstruction - See MCDisassembler.
- virtual DecodeStatus getInstruction(MCInst &instr,
- uint64_t &size,
- const MemoryObject ®ion,
- uint64_t address,
- raw_ostream &vStream,
- raw_ostream &cStream) const;
-};
+ bool hasCnMips() const { return STI.getFeatureBits()[Mips::FeatureCnMips]; }
+ bool hasCOP3() const {
+ // Only present in MIPS-I and MIPS-II
+ return !hasMips32() && !hasMips3();
+ }
-/// Mips64Disassembler - a disasembler class for Mips64.
-class Mips64Disassembler : public MipsDisassemblerBase {
-public:
- /// Constructor - Initializes the disassembler.
- ///
- Mips64Disassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
- bool bigEndian) :
- MipsDisassemblerBase(STI, Info, bigEndian) {}
-
- /// getInstruction - See MCDisassembler.
- virtual DecodeStatus getInstruction(MCInst &instr,
- uint64_t &size,
- const MemoryObject ®ion,
- uint64_t address,
- raw_ostream &vStream,
- raw_ostream &cStream) const;
+ DecodeStatus getInstruction(MCInst &Instr, uint64_t &Size,
+ ArrayRef<uint8_t> Bytes, uint64_t Address,
+ raw_ostream &VStream,
+ raw_ostream &CStream) const override;
};
} // end anonymous namespace
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder);
-static DecodeStatus DecodeDSPRegsRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder);
+static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
unsigned Insn,
uint64_t Address,
uint64_t Address,
const void *Decoder);
-static DecodeStatus DecodeACRegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder);
+static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
-static DecodeStatus DecodeHIRegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder);
+static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
-static DecodeStatus DecodeLORegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder);
+static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
static DecodeStatus DecodeBranchTarget(MCInst &Inst,
unsigned Offset,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder);
+
+// DecodeBranchTarget7MM - Decode microMIPS branch offset, which is
+// shifted left by 1 bit.
+static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder);
+
+// DecodeBranchTarget10MM - Decode microMIPS branch offset, which is
+// shifted left by 1 bit.
+static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder);
+
+// DecodeBranchTargetMM - Decode microMIPS branch offset, which is
+// shifted left by 1 bit.
+static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder);
+
+// DecodeJumpTargetMM - Decode microMIPS jump target, which is
+// shifted left by 1 bit.
+static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeMem(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeCacheOp(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeCacheOpR6(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeStoreEvaOpMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeSyncI(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeFMem(MCInst &Inst, unsigned Insn,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeFMem2(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeFMem3(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeFMemCop2R6(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeLiSimm7(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeSimm4(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeSimm16(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder);
+// Decode the immediate field of an LSA instruction which
+// is off by one.
+static DecodeStatus DecodeLSAImm(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeInsSize(MCInst &Inst,
unsigned Insn,
uint64_t Address,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeUImm5lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder);
+
+/// INSVE_[BHWD] have an implicit operand that the generated decoder doesn't
+/// handle.
+template <typename InsnType>
+static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeAddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeDaddiGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeBlezlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeBgtzGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+template <typename InsnType>
+static DecodeStatus
+DecodeBlezGroupBranch(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeRegListOperand(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
+static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder);
+
namespace llvm {
extern Target TheMipselTarget, TheMipsTarget, TheMips64Target,
TheMips64elTarget;
static MCDisassembler *createMipsDisassembler(
const Target &T,
- const MCSubtargetInfo &STI) {
- return new MipsDisassembler(STI, T.createMCRegInfo(""), true);
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx) {
+ return new MipsDisassembler(STI, Ctx, true);
}
static MCDisassembler *createMipselDisassembler(
const Target &T,
- const MCSubtargetInfo &STI) {
- return new MipsDisassembler(STI, T.createMCRegInfo(""), false);
-}
-
-static MCDisassembler *createMips64Disassembler(
- const Target &T,
- const MCSubtargetInfo &STI) {
- return new Mips64Disassembler(STI, T.createMCRegInfo(""), true);
-}
-
-static MCDisassembler *createMips64elDisassembler(
- const Target &T,
- const MCSubtargetInfo &STI) {
- return new Mips64Disassembler(STI, T.createMCRegInfo(""), false);
+ const MCSubtargetInfo &STI,
+ MCContext &Ctx) {
+ return new MipsDisassembler(STI, Ctx, false);
}
extern "C" void LLVMInitializeMipsDisassembler() {
TargetRegistry::RegisterMCDisassembler(TheMipselTarget,
createMipselDisassembler);
TargetRegistry::RegisterMCDisassembler(TheMips64Target,
- createMips64Disassembler);
+ createMipsDisassembler);
TargetRegistry::RegisterMCDisassembler(TheMips64elTarget,
- createMips64elDisassembler);
+ createMipselDisassembler);
}
-
#include "MipsGenDisassemblerTables.inc"
- /// readInstruction - read four bytes from the MemoryObject
- /// and return 32 bit word sorted according to the given endianess
-static DecodeStatus readInstruction32(const MemoryObject ®ion,
- uint64_t address,
- uint64_t &size,
- uint32_t &insn,
- bool isBigEndian) {
- uint8_t Bytes[4];
+static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
+ const MipsDisassembler *Dis = static_cast<const MipsDisassembler*>(D);
+ const MCRegisterInfo *RegInfo = Dis->getContext().getRegisterInfo();
+ return *(RegInfo->getRegClass(RC).begin() + RegNo);
+}
- // We want to read exactly 4 Bytes of data.
- if (region.readBytes(address, 4, Bytes) == -1) {
- size = 0;
+template <typename InsnType>
+static DecodeStatus DecodeINSVE_DF(MCInst &MI, InsnType insn, uint64_t Address,
+ const void *Decoder) {
+ typedef DecodeStatus (*DecodeFN)(MCInst &, unsigned, uint64_t, const void *);
+ // The size of the n field depends on the element size
+ // The register class also depends on this.
+ InsnType tmp = fieldFromInstruction(insn, 17, 5);
+ unsigned NSize = 0;
+ DecodeFN RegDecoder = nullptr;
+ if ((tmp & 0x18) == 0x00) { // INSVE_B
+ NSize = 4;
+ RegDecoder = DecodeMSA128BRegisterClass;
+ } else if ((tmp & 0x1c) == 0x10) { // INSVE_H
+ NSize = 3;
+ RegDecoder = DecodeMSA128HRegisterClass;
+ } else if ((tmp & 0x1e) == 0x18) { // INSVE_W
+ NSize = 2;
+ RegDecoder = DecodeMSA128WRegisterClass;
+ } else if ((tmp & 0x1f) == 0x1c) { // INSVE_D
+ NSize = 1;
+ RegDecoder = DecodeMSA128DRegisterClass;
+ } else
+ llvm_unreachable("Invalid encoding");
+
+ assert(NSize != 0 && RegDecoder != nullptr);
+
+ // $wd
+ tmp = fieldFromInstruction(insn, 6, 5);
+ if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ // $wd_in
+ if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ // $n
+ tmp = fieldFromInstruction(insn, 16, NSize);
+ MI.addOperand(MCOperand::createImm(tmp));
+ // $ws
+ tmp = fieldFromInstruction(insn, 11, 5);
+ if (RegDecoder(MI, tmp, Address, Decoder) == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ // $n2
+ MI.addOperand(MCOperand::createImm(0));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeAddiGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the ADDI instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b001000 sssss ttttt iiiiiiiiiiiiiiii
+ // BOVC if rs >= rt
+ // BEQZALC if rs == 0 && rt != 0
+ // BEQC if rs < rt && rs != 0
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+ bool HasRs = false;
+
+ if (Rs >= Rt) {
+ MI.setOpcode(Mips::BOVC);
+ HasRs = true;
+ } else if (Rs != 0 && Rs < Rt) {
+ MI.setOpcode(Mips::BEQC);
+ HasRs = true;
+ } else
+ MI.setOpcode(Mips::BEQZALC);
+
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+ MI.addOperand(MCOperand::createImm(Imm));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeDaddiGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the ADDI instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b011000 sssss ttttt iiiiiiiiiiiiiiii
+ // BNVC if rs >= rt
+ // BNEZALC if rs == 0 && rt != 0
+ // BNEC if rs < rt && rs != 0
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+ bool HasRs = false;
+
+ if (Rs >= Rt) {
+ MI.setOpcode(Mips::BNVC);
+ HasRs = true;
+ } else if (Rs != 0 && Rs < Rt) {
+ MI.setOpcode(Mips::BNEC);
+ HasRs = true;
+ } else
+ MI.setOpcode(Mips::BNEZALC);
+
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+ MI.addOperand(MCOperand::createImm(Imm));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeBlezlGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the BLEZL instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b010110 sssss ttttt iiiiiiiiiiiiiiii
+ // Invalid if rs == 0
+ // BLEZC if rs == 0 && rt != 0
+ // BGEZC if rs == rt && rt != 0
+ // BGEC if rs != rt && rs != 0 && rt != 0
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+ bool HasRs = false;
+
+ if (Rt == 0)
return MCDisassembler::Fail;
+ else if (Rs == 0)
+ MI.setOpcode(Mips::BLEZC);
+ else if (Rs == Rt)
+ MI.setOpcode(Mips::BGEZC);
+ else {
+ HasRs = true;
+ MI.setOpcode(Mips::BGEC);
}
- if (isBigEndian) {
- // Encoded as a big-endian 32-bit word in the stream.
- insn = (Bytes[3] << 0) |
- (Bytes[2] << 8) |
- (Bytes[1] << 16) |
- (Bytes[0] << 24);
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+
+ MI.addOperand(MCOperand::createImm(Imm));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeBgtzlGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the BGTZL instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b010111 sssss ttttt iiiiiiiiiiiiiiii
+ // Invalid if rs == 0
+ // BGTZC if rs == 0 && rt != 0
+ // BLTZC if rs == rt && rt != 0
+ // BLTC if rs != rt && rs != 0 && rt != 0
+
+ bool HasRs = false;
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+
+ if (Rt == 0)
+ return MCDisassembler::Fail;
+ else if (Rs == 0)
+ MI.setOpcode(Mips::BGTZC);
+ else if (Rs == Rt)
+ MI.setOpcode(Mips::BLTZC);
+ else {
+ MI.setOpcode(Mips::BLTC);
+ HasRs = true;
+ }
+
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+
+ MI.addOperand(MCOperand::createImm(Imm));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeBgtzGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the BGTZ instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b000111 sssss ttttt iiiiiiiiiiiiiiii
+ // BGTZ if rt == 0
+ // BGTZALC if rs == 0 && rt != 0
+ // BLTZALC if rs != 0 && rs == rt
+ // BLTUC if rs != 0 && rs != rt
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+ bool HasRs = false;
+ bool HasRt = false;
+
+ if (Rt == 0) {
+ MI.setOpcode(Mips::BGTZ);
+ HasRs = true;
+ } else if (Rs == 0) {
+ MI.setOpcode(Mips::BGTZALC);
+ HasRt = true;
+ } else if (Rs == Rt) {
+ MI.setOpcode(Mips::BLTZALC);
+ HasRs = true;
+ } else {
+ MI.setOpcode(Mips::BLTUC);
+ HasRs = true;
+ HasRt = true;
}
+
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+
+ if (HasRt)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+
+ MI.addOperand(MCOperand::createImm(Imm));
+
+ return MCDisassembler::Success;
+}
+
+template <typename InsnType>
+static DecodeStatus DecodeBlezGroupBranch(MCInst &MI, InsnType insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // If we are called then we can assume that MIPS32r6/MIPS64r6 is enabled
+ // (otherwise we would have matched the BLEZL instruction from the earlier
+ // ISA's instead).
+ //
+ // We have:
+ // 0b000110 sssss ttttt iiiiiiiiiiiiiiii
+ // Invalid if rs == 0
+ // BLEZALC if rs == 0 && rt != 0
+ // BGEZALC if rs == rt && rt != 0
+ // BGEUC if rs != rt && rs != 0 && rt != 0
+
+ InsnType Rs = fieldFromInstruction(insn, 21, 5);
+ InsnType Rt = fieldFromInstruction(insn, 16, 5);
+ InsnType Imm = SignExtend64(fieldFromInstruction(insn, 0, 16), 16) * 4;
+ bool HasRs = false;
+
+ if (Rt == 0)
+ return MCDisassembler::Fail;
+ else if (Rs == 0)
+ MI.setOpcode(Mips::BLEZALC);
+ else if (Rs == Rt)
+ MI.setOpcode(Mips::BGEZALC);
else {
- // Encoded as a small-endian 32-bit word in the stream.
- insn = (Bytes[0] << 0) |
- (Bytes[1] << 8) |
- (Bytes[2] << 16) |
- (Bytes[3] << 24);
+ HasRs = true;
+ MI.setOpcode(Mips::BGEUC);
}
+ if (HasRs)
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rs)));
+ MI.addOperand(MCOperand::createReg(getReg(Decoder, Mips::GPR32RegClassID,
+ Rt)));
+
+ MI.addOperand(MCOperand::createImm(Imm));
+
return MCDisassembler::Success;
}
-DecodeStatus
-MipsDisassembler::getInstruction(MCInst &instr,
- uint64_t &Size,
- const MemoryObject &Region,
- uint64_t Address,
- raw_ostream &vStream,
- raw_ostream &cStream) const {
- uint32_t Insn;
+/// Read two bytes from the ArrayRef and return 16 bit halfword sorted
+/// according to the given endianess.
+static DecodeStatus readInstruction16(ArrayRef<uint8_t> Bytes, uint64_t Address,
+ uint64_t &Size, uint32_t &Insn,
+ bool IsBigEndian) {
+ // We want to read exactly 2 Bytes of data.
+ if (Bytes.size() < 2) {
+ Size = 0;
+ return MCDisassembler::Fail;
+ }
- DecodeStatus Result = readInstruction32(Region, Address, Size,
- Insn, isBigEndian);
- if (Result == MCDisassembler::Fail)
+ if (IsBigEndian) {
+ Insn = (Bytes[0] << 8) | Bytes[1];
+ } else {
+ Insn = (Bytes[1] << 8) | Bytes[0];
+ }
+
+ return MCDisassembler::Success;
+}
+
+/// Read four bytes from the ArrayRef and return 32 bit word sorted
+/// according to the given endianess
+static DecodeStatus readInstruction32(ArrayRef<uint8_t> Bytes, uint64_t Address,
+ uint64_t &Size, uint32_t &Insn,
+ bool IsBigEndian, bool IsMicroMips) {
+ // We want to read exactly 4 Bytes of data.
+ if (Bytes.size() < 4) {
+ Size = 0;
return MCDisassembler::Fail;
+ }
- // Calling the auto-generated decoder function.
- Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address,
- this, STI);
- if (Result != MCDisassembler::Fail) {
- Size = 4;
- return Result;
+ // High 16 bits of a 32-bit microMIPS instruction (where the opcode is)
+ // always precede the low 16 bits in the instruction stream (that is, they
+ // are placed at lower addresses in the instruction stream).
+ //
+ // microMIPS byte ordering:
+ // Big-endian: 0 | 1 | 2 | 3
+ // Little-endian: 1 | 0 | 3 | 2
+
+ if (IsBigEndian) {
+ // Encoded as a big-endian 32-bit word in the stream.
+ Insn =
+ (Bytes[3] << 0) | (Bytes[2] << 8) | (Bytes[1] << 16) | (Bytes[0] << 24);
+ } else {
+ if (IsMicroMips) {
+ Insn = (Bytes[2] << 0) | (Bytes[3] << 8) | (Bytes[0] << 16) |
+ (Bytes[1] << 24);
+ } else {
+ Insn = (Bytes[0] << 0) | (Bytes[1] << 8) | (Bytes[2] << 16) |
+ (Bytes[3] << 24);
+ }
}
- return MCDisassembler::Fail;
+ return MCDisassembler::Success;
}
-DecodeStatus
-Mips64Disassembler::getInstruction(MCInst &instr,
- uint64_t &Size,
- const MemoryObject &Region,
- uint64_t Address,
- raw_ostream &vStream,
- raw_ostream &cStream) const {
+DecodeStatus MipsDisassembler::getInstruction(MCInst &Instr, uint64_t &Size,
+ ArrayRef<uint8_t> Bytes,
+ uint64_t Address,
+ raw_ostream &VStream,
+ raw_ostream &CStream) const {
uint32_t Insn;
+ DecodeStatus Result;
+
+ if (IsMicroMips) {
+ Result = readInstruction16(Bytes, Address, Size, Insn, IsBigEndian);
+
+ if (hasMips32r6()) {
+ DEBUG(dbgs() << "Trying MicroMipsR616 table (16-bit instructions):\n");
+ // Calling the auto-generated decoder function for microMIPS32R6
+ // (and microMIPS64R6) 16-bit instructions.
+ Result = decodeInstruction(DecoderTableMicroMipsR616, Instr, Insn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 2;
+ return Result;
+ }
+ }
+
+ DEBUG(dbgs() << "Trying MicroMips16 table (16-bit instructions):\n");
+ // Calling the auto-generated decoder function for microMIPS 16-bit
+ // instructions.
+ Result = decodeInstruction(DecoderTableMicroMips16, Instr, Insn, Address,
+ this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 2;
+ return Result;
+ }
+
+ Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, true);
+ if (Result == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+
+ if (hasMips32r6()) {
+ DEBUG(dbgs() << "Trying MicroMips32r632 table (32-bit instructions):\n");
+ // Calling the auto-generated decoder function.
+ Result = decodeInstruction(DecoderTableMicroMipsR632, Instr, Insn, Address,
+ this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ }
+
+ DEBUG(dbgs() << "Trying MicroMips32 table (32-bit instructions):\n");
+ // Calling the auto-generated decoder function.
+ Result = decodeInstruction(DecoderTableMicroMips32, Instr, Insn, Address,
+ this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ return MCDisassembler::Fail;
+ }
- DecodeStatus Result = readInstruction32(Region, Address, Size,
- Insn, isBigEndian);
+ Result = readInstruction32(Bytes, Address, Size, Insn, IsBigEndian, false);
if (Result == MCDisassembler::Fail)
return MCDisassembler::Fail;
- // Calling the auto-generated decoder function.
- Result = decodeInstruction(DecoderTableMips6432, instr, Insn, Address,
- this, STI);
- if (Result != MCDisassembler::Fail) {
- Size = 4;
- return Result;
+ if (hasCOP3()) {
+ DEBUG(dbgs() << "Trying COP3_ table (32-bit opcodes):\n");
+ Result =
+ decodeInstruction(DecoderTableCOP3_32, Instr, Insn, Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ }
+
+ if (hasMips32r6() && isGP64()) {
+ DEBUG(dbgs() << "Trying Mips32r6_64r6 (GPR64) table (32-bit opcodes):\n");
+ Result = decodeInstruction(DecoderTableMips32r6_64r6_GP6432, Instr, Insn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ }
+
+ if (hasMips32r6()) {
+ DEBUG(dbgs() << "Trying Mips32r6_64r6 table (32-bit opcodes):\n");
+ Result = decodeInstruction(DecoderTableMips32r6_64r632, Instr, Insn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ }
+
+ if (hasCnMips()) {
+ DEBUG(dbgs() << "Trying CnMips table (32-bit opcodes):\n");
+ Result = decodeInstruction(DecoderTableCnMips32, Instr, Insn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
+ }
+
+ if (isGP64()) {
+ DEBUG(dbgs() << "Trying Mips64 (GPR64) table (32-bit opcodes):\n");
+ Result = decodeInstruction(DecoderTableMips6432, Instr, Insn,
+ Address, this, STI);
+ if (Result != MCDisassembler::Fail) {
+ Size = 4;
+ return Result;
+ }
}
- // If we fail to decode in Mips64 decoder space we can try in Mips32
- Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address,
- this, STI);
+
+ DEBUG(dbgs() << "Trying Mips table (32-bit opcodes):\n");
+ // Calling the auto-generated decoder function.
+ Result =
+ decodeInstruction(DecoderTableMips32, Instr, Insn, Address, this, STI);
if (Result != MCDisassembler::Fail) {
Size = 4;
return Result;
return MCDisassembler::Fail;
}
-static unsigned getReg(const void *D, unsigned RC, unsigned RegNo) {
- const MipsDisassemblerBase *Dis = static_cast<const MipsDisassemblerBase*>(D);
- return *(Dis->getRegInfo()->getRegClass(RC).begin() + RegNo);
-}
-
static DecodeStatus DecodeCPU16RegsRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, Mips::GPR64RegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder) {
- if (RegNo > 31)
- return MCDisassembler::Fail;
- unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
- return MCDisassembler::Success;
-}
-
-static DecodeStatus DecodeDSPRegsRegisterClass(MCInst &Inst,
+static DecodeStatus DecodeGPRMM16RegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
const void *Decoder) {
- return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
+ if (RegNo > 7)
+ return MCDisassembler::Fail;
+ unsigned Reg = getReg(Decoder, Mips::GPRMM16RegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
}
-static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
- unsigned RegNo,
+static DecodeStatus DecodeGPRMM16ZeroRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 7)
+ return MCDisassembler::Fail;
+ unsigned Reg = getReg(Decoder, Mips::GPRMM16ZeroRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeGPRMM16MovePRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 7)
+ return MCDisassembler::Fail;
+ unsigned Reg = getReg(Decoder, Mips::GPRMM16MovePRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+ unsigned Reg = getReg(Decoder, Mips::GPR32RegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (static_cast<const MipsDisassembler *>(Decoder)->isGP64())
+ return DecodeGPR64RegisterClass(Inst, RegNo, Address, Decoder);
+
+ return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
+}
+
+static DecodeStatus DecodeDSPRRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ return DecodeGPR32RegisterClass(Inst, RegNo, Address, Decoder);
+}
+
+static DecodeStatus DecodeFGR64RegisterClass(MCInst &Inst,
+ unsigned RegNo,
uint64_t Address,
const void *Decoder) {
if (RegNo > 31)
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, Mips::FGR64RegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, Mips::FGR32RegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
if (RegNo > 31)
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, Mips::CCRRegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
if (RegNo > 7)
return MCDisassembler::Fail;
unsigned Reg = getReg(Decoder, Mips::FCCRegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeFGRCCRegisterClass(MCInst &Inst, unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::FGRCCRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
- if(Inst.getOpcode() == Mips::SC){
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ if(Inst.getOpcode() == Mips::SC ||
+ Inst.getOpcode() == Mips::SCD){
+ Inst.addOperand(MCOperand::createReg(Reg));
}
- Inst.addOperand(MCOperand::CreateReg(Reg));
- Inst.addOperand(MCOperand::CreateReg(Base));
- Inst.addOperand(MCOperand::CreateImm(Offset));
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeCacheOp(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<16>(Insn & 0xffff);
+ unsigned Hint = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+ Inst.addOperand(MCOperand::createImm(Hint));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeCacheOpMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<12>(Insn & 0xfff);
+ unsigned Base = fieldFromInstruction(Insn, 16, 5);
+ unsigned Hint = fieldFromInstruction(Insn, 21, 5);
+
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+ Inst.addOperand(MCOperand::createImm(Hint));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeCacheOpR6(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = fieldFromInstruction(Insn, 7, 9);
+ unsigned Hint = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+ Inst.addOperand(MCOperand::createImm(Hint));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeStoreEvaOpMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<9>(Insn & 0x1ff);
+ unsigned Reg = fieldFromInstruction(Insn, 21, 5);
+ unsigned Base = fieldFromInstruction(Insn, 16, 5);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSyncI(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<16>(Insn & 0xffff);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSA128Mem(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ int Offset = SignExtend32<10>(fieldFromInstruction(Insn, 16, 10));
+ unsigned Reg = fieldFromInstruction(Insn, 6, 5);
+ unsigned Base = fieldFromInstruction(Insn, 11, 5);
+
+ Reg = getReg(Decoder, Mips::MSA128BRegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+
+ // The immediate field of an LD/ST instruction is scaled which means it must
+ // be multiplied (when decoding) by the size (in bytes) of the instructions'
+ // data format.
+ // .b - 1 byte
+ // .h - 2 bytes
+ // .w - 4 bytes
+ // .d - 8 bytes
+ switch(Inst.getOpcode())
+ {
+ default:
+ assert (0 && "Unexpected instruction");
+ return MCDisassembler::Fail;
+ break;
+ case Mips::LD_B:
+ case Mips::ST_B:
+ Inst.addOperand(MCOperand::createImm(Offset));
+ break;
+ case Mips::LD_H:
+ case Mips::ST_H:
+ Inst.addOperand(MCOperand::createImm(Offset * 2));
+ break;
+ case Mips::LD_W:
+ case Mips::ST_W:
+ Inst.addOperand(MCOperand::createImm(Offset * 4));
+ break;
+ case Mips::LD_D:
+ case Mips::ST_D:
+ Inst.addOperand(MCOperand::createImm(Offset * 8));
+ break;
+ }
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMImm4(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned Offset = Insn & 0xf;
+ unsigned Reg = fieldFromInstruction(Insn, 7, 3);
+ unsigned Base = fieldFromInstruction(Insn, 4, 3);
+
+ switch (Inst.getOpcode()) {
+ case Mips::LBU16_MM:
+ case Mips::LHU16_MM:
+ case Mips::LW16_MM:
+ if (DecodeGPRMM16RegisterClass(Inst, Reg, Address, Decoder)
+ == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ break;
+ case Mips::SB16_MM:
+ case Mips::SH16_MM:
+ case Mips::SW16_MM:
+ if (DecodeGPRMM16ZeroRegisterClass(Inst, Reg, Address, Decoder)
+ == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ break;
+ }
+
+ if (DecodeGPRMM16RegisterClass(Inst, Base, Address, Decoder)
+ == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+
+ switch (Inst.getOpcode()) {
+ case Mips::LBU16_MM:
+ if (Offset == 0xf)
+ Inst.addOperand(MCOperand::createImm(-1));
+ else
+ Inst.addOperand(MCOperand::createImm(Offset));
+ break;
+ case Mips::SB16_MM:
+ Inst.addOperand(MCOperand::createImm(Offset));
+ break;
+ case Mips::LHU16_MM:
+ case Mips::SH16_MM:
+ Inst.addOperand(MCOperand::createImm(Offset << 1));
+ break;
+ case Mips::LW16_MM:
+ case Mips::SW16_MM:
+ Inst.addOperand(MCOperand::createImm(Offset << 2));
+ break;
+ }
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMSPImm5Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned Offset = Insn & 0x1F;
+ unsigned Reg = fieldFromInstruction(Insn, 5, 5);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Mips::SP));
+ Inst.addOperand(MCOperand::createImm(Offset << 2));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMGPImm7Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned Offset = Insn & 0x7F;
+ unsigned Reg = fieldFromInstruction(Insn, 7, 3);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Mips::GP));
+ Inst.addOperand(MCOperand::createImm(Offset << 2));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMReglistImm4Lsl2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<4>(Insn & 0xf);
+
+ if (DecodeRegListOperand16(Inst, Insn, Address, Decoder)
+ == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+
+ Inst.addOperand(MCOperand::createReg(Mips::SP));
+ Inst.addOperand(MCOperand::createImm(Offset << 2));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMImm9(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<9>(Insn & 0x1ff);
+ unsigned Reg = fieldFromInstruction(Insn, 21, 5);
+ unsigned Base = fieldFromInstruction(Insn, 16, 5);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMImm12(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<12>(Insn & 0x0fff);
+ unsigned Reg = fieldFromInstruction(Insn, 21, 5);
+ unsigned Base = fieldFromInstruction(Insn, 16, 5);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ switch (Inst.getOpcode()) {
+ case Mips::SWM32_MM:
+ case Mips::LWM32_MM:
+ if (DecodeRegListOperand(Inst, Insn, Address, Decoder)
+ == MCDisassembler::Fail)
+ return MCDisassembler::Fail;
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+ break;
+ case Mips::SC_MM:
+ Inst.addOperand(MCOperand::createReg(Reg));
+ // fallthrough
+ default:
+ Inst.addOperand(MCOperand::createReg(Reg));
+ if (Inst.getOpcode() == Mips::LWP_MM || Inst.getOpcode() == Mips::SWP_MM)
+ Inst.addOperand(MCOperand::createReg(Reg+1));
+
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+ }
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMemMMImm16(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<16>(Insn & 0xffff);
+ unsigned Reg = fieldFromInstruction(Insn, 21, 5);
+ unsigned Base = fieldFromInstruction(Insn, 16, 5);
+
+ Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
return MCDisassembler::Success;
}
Reg = getReg(Decoder, Mips::FGR64RegClassID, Reg);
Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
- Inst.addOperand(MCOperand::CreateReg(Reg));
- Inst.addOperand(MCOperand::CreateReg(Base));
- Inst.addOperand(MCOperand::CreateImm(Offset));
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeFMem2(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<16>(Insn & 0xffff);
+ unsigned Reg = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
return MCDisassembler::Success;
}
+static DecodeStatus DecodeFMem3(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<16>(Insn & 0xffff);
+ unsigned Reg = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Reg = getReg(Decoder, Mips::COP3RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeFMemCop2R6(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int Offset = SignExtend32<11>(Insn & 0x07ff);
+ unsigned Reg = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 11, 5);
+
+ Reg = getReg(Decoder, Mips::COP2RegClassID, Reg);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ Inst.addOperand(MCOperand::createReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
+static DecodeStatus DecodeSpecial3LlSc(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ int64_t Offset = SignExtend64<9>((Insn >> 7) & 0x1ff);
+ unsigned Rt = fieldFromInstruction(Insn, 16, 5);
+ unsigned Base = fieldFromInstruction(Insn, 21, 5);
+
+ Rt = getReg(Decoder, Mips::GPR32RegClassID, Rt);
+ Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
+
+ if(Inst.getOpcode() == Mips::SC_R6 || Inst.getOpcode() == Mips::SCD_R6){
+ Inst.addOperand(MCOperand::createReg(Rt));
+ }
+
+ Inst.addOperand(MCOperand::createReg(Rt));
+ Inst.addOperand(MCOperand::createReg(Base));
+ Inst.addOperand(MCOperand::createImm(Offset));
+
+ return MCDisassembler::Success;
+}
static DecodeStatus DecodeHWRegsRegisterClass(MCInst &Inst,
unsigned RegNo,
// Currently only hardware register 29 is supported.
if (RegNo != 29)
return MCDisassembler::Fail;
- Inst.addOperand(MCOperand::CreateReg(Mips::HWR29));
+ Inst.addOperand(MCOperand::createReg(Mips::HWR29));
return MCDisassembler::Success;
}
;
unsigned Reg = getReg(Decoder, Mips::AFGR64RegClassID, RegNo /2);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeACRegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder) {
+static DecodeStatus DecodeACC64DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
if (RegNo >= 4)
return MCDisassembler::Fail;
- unsigned Reg = getReg(Decoder, Mips::ACRegsDSPRegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ unsigned Reg = getReg(Decoder, Mips::ACC64DSPRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeHIRegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder) {
+static DecodeStatus DecodeHI32DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
if (RegNo >= 4)
return MCDisassembler::Fail;
- unsigned Reg = getReg(Decoder, Mips::HIRegsDSPRegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ unsigned Reg = getReg(Decoder, Mips::HI32DSPRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
-static DecodeStatus DecodeLORegsDSPRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder) {
+static DecodeStatus DecodeLO32DSPRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
if (RegNo >= 4)
return MCDisassembler::Fail;
- unsigned Reg = getReg(Decoder, Mips::LORegsDSPRegClassID, RegNo);
- Inst.addOperand(MCOperand::CreateReg(Reg));
+ unsigned Reg = getReg(Decoder, Mips::LO32DSPRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSA128BRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::MSA128BRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSA128HRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::MSA128HRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSA128WRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::MSA128WRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSA128DRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::MSA128DRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMSACtrlRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 7)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::MSACtrlRegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeCOP0RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::COP0RegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeCOP2RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::COP2RegClassID, RegNo);
+ Inst.addOperand(MCOperand::createReg(Reg));
return MCDisassembler::Success;
}
unsigned Offset,
uint64_t Address,
const void *Decoder) {
- unsigned BranchOffset = Offset & 0xffff;
- BranchOffset = SignExtend32<18>(BranchOffset << 2) + 4;
- Inst.addOperand(MCOperand::CreateImm(BranchOffset));
+ int32_t BranchOffset = (SignExtend32<16>(Offset) * 4) + 4;
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
return MCDisassembler::Success;
}
const void *Decoder) {
unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 2;
- Inst.addOperand(MCOperand::CreateImm(JumpOffset));
+ Inst.addOperand(MCOperand::createImm(JumpOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTarget21(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ int32_t BranchOffset = SignExtend32<21>(Offset) * 4;
+
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTarget26(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ int32_t BranchOffset = SignExtend32<26>(Offset) * 4;
+
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTarget7MM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ int32_t BranchOffset = SignExtend32<7>(Offset) << 1;
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTarget10MM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ int32_t BranchOffset = SignExtend32<10>(Offset) << 1;
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ int32_t BranchOffset = SignExtend32<16>(Offset) * 2;
+ Inst.addOperand(MCOperand::createImm(BranchOffset));
return MCDisassembler::Success;
}
+static DecodeStatus DecodeJumpTargetMM(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned JumpOffset = fieldFromInstruction(Insn, 0, 26) << 1;
+ Inst.addOperand(MCOperand::createImm(JumpOffset));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeAddiur2Simm7(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder) {
+ if (Value == 0)
+ Inst.addOperand(MCOperand::createImm(1));
+ else if (Value == 0x7)
+ Inst.addOperand(MCOperand::createImm(-1));
+ else
+ Inst.addOperand(MCOperand::createImm(Value << 2));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeUImm6Lsl2(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(Value << 2));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeLiSimm7(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder) {
+ if (Value == 0x7F)
+ Inst.addOperand(MCOperand::createImm(-1));
+ else
+ Inst.addOperand(MCOperand::createImm(Value));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSimm4(MCInst &Inst,
+ unsigned Value,
+ uint64_t Address,
+ const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(SignExtend32<4>(Value)));
+ return MCDisassembler::Success;
+}
static DecodeStatus DecodeSimm16(MCInst &Inst,
unsigned Insn,
uint64_t Address,
const void *Decoder) {
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Insn)));
+ Inst.addOperand(MCOperand::createImm(SignExtend32<16>(Insn)));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeLSAImm(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ // We add one to the immediate field as it was encoded as 'imm - 1'.
+ Inst.addOperand(MCOperand::createImm(Insn + 1));
return MCDisassembler::Success;
}
// First we need to grab the pos(lsb) from MCInst.
int Pos = Inst.getOperand(2).getImm();
int Size = (int) Insn - Pos + 1;
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
+ Inst.addOperand(MCOperand::createImm(SignExtend32<16>(Size)));
return MCDisassembler::Success;
}
uint64_t Address,
const void *Decoder) {
int Size = (int) Insn + 1;
- Inst.addOperand(MCOperand::CreateImm(SignExtend32<16>(Size)));
+ Inst.addOperand(MCOperand::createImm(SignExtend32<16>(Size)));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSimm19Lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(SignExtend32<19>(Insn) * 4));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSimm18Lsl3(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(SignExtend32<18>(Insn) * 8));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSimm9SP(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ int32_t DecodedValue;
+ switch (Insn) {
+ case 0: DecodedValue = 256; break;
+ case 1: DecodedValue = 257; break;
+ case 510: DecodedValue = -258; break;
+ case 511: DecodedValue = -257; break;
+ default: DecodedValue = SignExtend32<9>(Insn); break;
+ }
+ Inst.addOperand(MCOperand::createImm(DecodedValue * 4));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeANDI16Imm(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ // Insn must be >= 0, since it is unsigned that condition is always true.
+ assert(Insn < 16);
+ int32_t DecodedValues[] = {128, 1, 2, 3, 4, 7, 8, 15, 16, 31, 32, 63, 64,
+ 255, 32768, 65535};
+ Inst.addOperand(MCOperand::createImm(DecodedValues[Insn]));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeUImm5lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(Insn << 2));
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeRegListOperand(MCInst &Inst,
+ unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3, Mips::S4, Mips::S5,
+ Mips::S6, Mips::FP};
+ unsigned RegNum;
+
+ unsigned RegLst = fieldFromInstruction(Insn, 21, 5);
+ // Empty register lists are not allowed.
+ if (RegLst == 0)
+ return MCDisassembler::Fail;
+
+ RegNum = RegLst & 0xf;
+ for (unsigned i = 0; i < RegNum; i++)
+ Inst.addOperand(MCOperand::createReg(Regs[i]));
+
+ if (RegLst & 0x10)
+ Inst.addOperand(MCOperand::createReg(Mips::RA));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeRegListOperand16(MCInst &Inst, unsigned Insn,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned Regs[] = {Mips::S0, Mips::S1, Mips::S2, Mips::S3};
+ unsigned RegLst = fieldFromInstruction(Insn, 4, 2);
+ unsigned RegNum = RegLst & 0x3;
+
+ for (unsigned i = 0; i <= RegNum; i++)
+ Inst.addOperand(MCOperand::createReg(Regs[i]));
+
+ Inst.addOperand(MCOperand::createReg(Mips::RA));
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeMovePRegPair(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+
+ unsigned RegPair = fieldFromInstruction(Insn, 7, 3);
+
+ switch (RegPair) {
+ default:
+ return MCDisassembler::Fail;
+ case 0:
+ Inst.addOperand(MCOperand::createReg(Mips::A1));
+ Inst.addOperand(MCOperand::createReg(Mips::A2));
+ break;
+ case 1:
+ Inst.addOperand(MCOperand::createReg(Mips::A1));
+ Inst.addOperand(MCOperand::createReg(Mips::A3));
+ break;
+ case 2:
+ Inst.addOperand(MCOperand::createReg(Mips::A2));
+ Inst.addOperand(MCOperand::createReg(Mips::A3));
+ break;
+ case 3:
+ Inst.addOperand(MCOperand::createReg(Mips::A0));
+ Inst.addOperand(MCOperand::createReg(Mips::S5));
+ break;
+ case 4:
+ Inst.addOperand(MCOperand::createReg(Mips::A0));
+ Inst.addOperand(MCOperand::createReg(Mips::S6));
+ break;
+ case 5:
+ Inst.addOperand(MCOperand::createReg(Mips::A0));
+ Inst.addOperand(MCOperand::createReg(Mips::A1));
+ break;
+ case 6:
+ Inst.addOperand(MCOperand::createReg(Mips::A0));
+ Inst.addOperand(MCOperand::createReg(Mips::A2));
+ break;
+ case 7:
+ Inst.addOperand(MCOperand::createReg(Mips::A0));
+ Inst.addOperand(MCOperand::createReg(Mips::A3));
+ break;
+ }
+
+ return MCDisassembler::Success;
+}
+
+static DecodeStatus DecodeSimm23Lsl2(MCInst &Inst, unsigned Insn,
+ uint64_t Address, const void *Decoder) {
+ Inst.addOperand(MCOperand::createImm(SignExtend32<25>(Insn << 2)));
return MCDisassembler::Success;
}
projects / oota-llvm.git / blobdiff