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author | Vladimir Medic <Vladimir.Medic@imgtec.com> | 2013-09-06 12:30:36 +0000 |
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committer | Vladimir Medic <Vladimir.Medic@imgtec.com> | 2013-09-06 12:30:36 +0000 |
commit | a674463aac1d0b5d039da11045ccfab5e849b886 (patch) | |
tree | 1ecfae7ee4f4e242012dbbfbc7b34c58be5fe1b2 /lib/Target | |
parent | 99d02d13259620d175986bf9c7e1c07b2640163d (diff) | |
download | llvm-a674463aac1d0b5d039da11045ccfab5e849b886.tar.gz llvm-a674463aac1d0b5d039da11045ccfab5e849b886.tar.bz2 llvm-a674463aac1d0b5d039da11045ccfab5e849b886.tar.xz |
This patch adds support for microMIPS disassembler and disassembler make check tests.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190144 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
-rw-r--r-- | lib/Target/Mips/Disassembler/MipsDisassembler.cpp | 87 | ||||
-rw-r--r-- | lib/Target/Mips/MicroMipsInstrInfo.td | 23 |
2 files changed, 93 insertions, 17 deletions
diff --git a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp index 6e12a5d5e5..e2b3fa4182 100644 --- a/lib/Target/Mips/Disassembler/MipsDisassembler.cpp +++ b/lib/Target/Mips/Disassembler/MipsDisassembler.cpp @@ -53,12 +53,15 @@ protected: /// 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, @@ -182,6 +185,16 @@ static DecodeStatus DecodeMem(MCInst &Inst, 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); @@ -251,7 +264,8 @@ static DecodeStatus readInstruction32(const MemoryObject ®ion, 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. @@ -269,10 +283,20 @@ static DecodeStatus readInstruction32(const MemoryObject ®ion, } 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; @@ -288,10 +312,21 @@ 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); @@ -313,7 +348,7 @@ 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; @@ -470,6 +505,42 @@ static DecodeStatus DecodeMem(MCInst &Inst, 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, diff --git a/lib/Target/Mips/MicroMipsInstrInfo.td b/lib/Target/Mips/MicroMipsInstrInfo.td index 2cc5555305..273d3ccd0a 100644 --- a/lib/Target/Mips/MicroMipsInstrInfo.td +++ b/lib/Target/Mips/MicroMipsInstrInfo.td @@ -19,6 +19,7 @@ class LoadLeftRightMM<string opstr, SDNode OpNode, RegisterOperand RO, !strconcat(opstr, "\t$rt, $addr"), [(set RO:$rt, (OpNode addrimm12:$addr, RO:$src))], NoItinerary, FrmI> { + let DecoderMethod = "DecodeMemMMImm12"; string Constraints = "$src = $rt"; } @@ -26,7 +27,9 @@ class StoreLeftRightMM<string opstr, SDNode OpNode, RegisterOperand RO, Operand MemOpnd>: InstSE<(outs), (ins RO:$rt, MemOpnd:$addr), !strconcat(opstr, "\t$rt, $addr"), - [(OpNode RO:$rt, addrimm12:$addr)], NoItinerary, FrmI>; + [(OpNode RO:$rt, addrimm12:$addr)], NoItinerary, FrmI> { + let DecoderMethod = "DecodeMemMMImm12"; +} let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in { /// Arithmetic Instructions (ALU Immediate) @@ -86,14 +89,16 @@ let DecoderNamespace = "MicroMips", Predicates = [InMicroMips] in { SRLV_FM_MM<0xd0, 0>; /// Load and Store Instructions - aligned - def LB_MM : Load<"lb", GPR32Opnd, sextloadi8>, MMRel, LW_FM_MM<0x7>; - def LBu_MM : Load<"lbu", GPR32Opnd, zextloadi8>, MMRel, LW_FM_MM<0x5>; - def LH_MM : Load<"lh", GPR32Opnd, sextloadi16>, MMRel, LW_FM_MM<0xf>; - def LHu_MM : Load<"lhu", GPR32Opnd, zextloadi16>, MMRel, LW_FM_MM<0xd>; - def LW_MM : Load<"lw", GPR32Opnd>, MMRel, LW_FM_MM<0x3f>; - def SB_MM : Store<"sb", GPR32Opnd, truncstorei8>, MMRel, LW_FM_MM<0x6>; - def SH_MM : Store<"sh", GPR32Opnd, truncstorei16>, MMRel, LW_FM_MM<0xe>; - def SW_MM : Store<"sw", GPR32Opnd>, MMRel, LW_FM_MM<0x3e>; + let DecoderMethod = "DecodeMemMMImm16" in { + def LB_MM : Load<"lb", GPR32Opnd>, MMRel, LW_FM_MM<0x7>; + def LBu_MM : Load<"lbu", GPR32Opnd>, MMRel, LW_FM_MM<0x5>; + def LH_MM : Load<"lh", GPR32Opnd>, MMRel, LW_FM_MM<0xf>; + def LHu_MM : Load<"lhu", GPR32Opnd>, MMRel, LW_FM_MM<0xd>; + def LW_MM : Load<"lw", GPR32Opnd>, MMRel, LW_FM_MM<0x3f>; + def SB_MM : Store<"sb", GPR32Opnd>, MMRel, LW_FM_MM<0x6>; + def SH_MM : Store<"sh", GPR32Opnd>, MMRel, LW_FM_MM<0xe>; + def SW_MM : Store<"sw", GPR32Opnd>, MMRel, LW_FM_MM<0x3e>; + } /// Load and Store Instructions - unaligned def LWL_MM : LoadLeftRightMM<"lwl", MipsLWL, GPR32Opnd, mem_mm_12>, |