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-rw-r--r--lib/Target/Mips/Disassembler/MipsDisassembler.cpp347
1 files changed, 303 insertions, 44 deletions
diff --git a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
index d99df4d..60508a8 100644
--- a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
+++ b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
@@ -35,26 +35,33 @@ public:
///
MipsDisassemblerBase(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
bool bigEndian) :
- MCDisassembler(STI), RegInfo(Info), isBigEndian(bigEndian) {}
+ MCDisassembler(STI), RegInfo(Info),
+ IsN64(STI.getFeatureBits() & Mips::FeatureN64), isBigEndian(bigEndian) {}
virtual ~MipsDisassemblerBase() {}
const MCRegisterInfo *getRegInfo() const { return RegInfo.get(); }
+ bool isN64() const { return IsN64; }
+
private:
OwningPtr<const MCRegisterInfo> RegInfo;
+ bool IsN64;
protected:
bool isBigEndian;
};
/// MipsDisassembler - a disasembler class for Mips32.
class MipsDisassembler : public MipsDisassemblerBase {
+ bool IsMicroMips;
public:
/// Constructor - Initializes the disassembler.
///
MipsDisassembler(const MCSubtargetInfo &STI, const MCRegisterInfo *Info,
bool bigEndian) :
- MipsDisassemblerBase(STI, Info, bigEndian) {}
+ MipsDisassemblerBase(STI, Info, bigEndian) {
+ IsMicroMips = STI.getFeatureBits() & Mips::FeatureMicroMips;
+ }
/// getInstruction - See MCDisassembler.
virtual DecodeStatus getInstruction(MCInst &instr,
@@ -103,10 +110,15 @@ static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
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,
@@ -118,6 +130,11 @@ static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
uint64_t Address,
const void *Decoder);
+static DecodeStatus DecodeFGRH32RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder);
+
static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
@@ -138,20 +155,45 @@ static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
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 DecodeBranchTarget(MCInst &Inst,
unsigned Offset,
@@ -163,11 +205,38 @@ static DecodeStatus DecodeJumpTarget(MCInst &Inst,
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 DecodeMSA128Mem(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);
@@ -177,6 +246,13 @@ static DecodeStatus DecodeSimm16(MCInst &Inst,
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,
@@ -237,7 +313,8 @@ static DecodeStatus readInstruction32(const MemoryObject &region,
uint64_t address,
uint64_t &size,
uint32_t &insn,
- bool isBigEndian) {
+ bool isBigEndian,
+ bool IsMicroMips) {
uint8_t Bytes[4];
// We want to read exactly 4 Bytes of data.
@@ -255,10 +332,20 @@ static DecodeStatus readInstruction32(const MemoryObject &region,
}
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);
+ // Little-endian byte ordering:
+ // mips32r2: 4 | 3 | 2 | 1
+ // microMIPS: 2 | 1 | 4 | 3
+ 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::Success;
@@ -274,10 +361,21 @@ MipsDisassembler::getInstruction(MCInst &instr,
uint32_t Insn;
DecodeStatus Result = readInstruction32(Region, Address, Size,
- Insn, isBigEndian);
+ Insn, isBigEndian, IsMicroMips);
if (Result == MCDisassembler::Fail)
return MCDisassembler::Fail;
+ if (IsMicroMips) {
+ // 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;
+ }
+
// Calling the auto-generated decoder function.
Result = decodeInstruction(DecoderTableMips32, instr, Insn, Address,
this, STI);
@@ -299,7 +397,7 @@ Mips64Disassembler::getInstruction(MCInst &instr,
uint32_t Insn;
DecodeStatus Result = readInstruction32(Region, Address, Size,
- Insn, isBigEndian);
+ Insn, isBigEndian, false);
if (Result == MCDisassembler::Fail)
return MCDisassembler::Fail;
@@ -359,10 +457,20 @@ static DecodeStatus DecodeGPR32RegisterClass(MCInst &Inst,
return MCDisassembler::Success;
}
-static DecodeStatus DecodeDSPRegsRegisterClass(MCInst &Inst,
- unsigned RegNo,
- uint64_t Address,
- const void *Decoder) {
+static DecodeStatus DecodePtrRegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (static_cast<const MipsDisassembler *>(Decoder)->isN64())
+ 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);
}
@@ -390,6 +498,18 @@ static DecodeStatus DecodeFGR32RegisterClass(MCInst &Inst,
return MCDisassembler::Success;
}
+static DecodeStatus DecodeFGRH32RegisterClass(MCInst &Inst,
+ unsigned RegNo,
+ uint64_t Address,
+ const void *Decoder) {
+ if (RegNo > 31)
+ return MCDisassembler::Fail;
+
+ unsigned Reg = getReg(Decoder, Mips::FGRH32RegClassID, RegNo);
+ Inst.addOperand(MCOperand::CreateReg(Reg));
+ return MCDisassembler::Success;
+}
+
static DecodeStatus DecodeCCRRegisterClass(MCInst &Inst,
unsigned RegNo,
uint64_t Address,
@@ -434,6 +554,58 @@ static DecodeStatus DecodeMem(MCInst &Inst,
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));
+ 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);
+
+ Inst.addOperand(MCOperand::CreateReg(Reg));
+ 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;
+}
+
static DecodeStatus DecodeFMem(MCInst &Inst,
unsigned Insn,
uint64_t Address,
@@ -477,38 +649,98 @@ static DecodeStatus DecodeAFGR64RegisterClass(MCInst &Inst,
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);
+ 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);
+ 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);
+ 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;
}
@@ -533,6 +765,24 @@ static DecodeStatus DecodeJumpTarget(MCInst &Inst,
return MCDisassembler::Success;
}
+static DecodeStatus DecodeBranchTargetMM(MCInst &Inst,
+ unsigned Offset,
+ uint64_t Address,
+ const void *Decoder) {
+ unsigned BranchOffset = Offset & 0xffff;
+ BranchOffset = SignExtend32<18>(BranchOffset << 1);
+ 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 DecodeSimm16(MCInst &Inst,
unsigned Insn,
@@ -542,6 +792,15 @@ static DecodeStatus DecodeSimm16(MCInst &Inst,
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;
+}
+
static DecodeStatus DecodeInsSize(MCInst &Inst,
unsigned Insn,
uint64_t Address,
generated by cgit v1.1 at 2025-07-04 00:47:52 +0000