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629 lines
16 KiB
629 lines
16 KiB
/* Capstone Disassembly Engine */
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/* TMS320C64x Backend by Fotis Loukos <me@fotisl.com> 2016 */
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#ifdef CAPSTONE_HAS_TMS320C64X
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#include <string.h>
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#include "../../cs_priv.h"
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#include "../../utils.h"
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#include "TMS320C64xDisassembler.h"
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#include "../../MCInst.h"
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#include "../../MCInstrDesc.h"
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#include "../../MCFixedLenDisassembler.h"
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#include "../../MCRegisterInfo.h"
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#include "../../MCDisassembler.h"
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#include "../../MathExtras.h"
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static uint64_t getFeatureBits(int mode);
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static DecodeStatus DecodeGPRegsRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeControlRegsRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeScst5(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeScst16(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodePCRelScst7(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodePCRelScst10(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodePCRelScst12(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodePCRelScst21(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeMemOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeMemOperandSc(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeMemOperand2(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeRegPair5(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeRegPair4(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeCondRegister(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeCondRegisterZero(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeSide(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeParallel(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeCrosspathX1(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeCrosspathX2(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeCrosspathX3(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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static DecodeStatus DecodeNop(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder);
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#include "TMS320C64xGenDisassemblerTables.inc"
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#define GET_REGINFO_ENUM
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#define GET_REGINFO_MC_DESC
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#include "TMS320C64xGenRegisterInfo.inc"
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static const unsigned GPRegsDecoderTable[] = {
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TMS320C64x_A0, TMS320C64x_A1, TMS320C64x_A2, TMS320C64x_A3,
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TMS320C64x_A4, TMS320C64x_A5, TMS320C64x_A6, TMS320C64x_A7,
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TMS320C64x_A8, TMS320C64x_A9, TMS320C64x_A10, TMS320C64x_A11,
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TMS320C64x_A12, TMS320C64x_A13, TMS320C64x_A14, TMS320C64x_A15,
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TMS320C64x_A16, TMS320C64x_A17, TMS320C64x_A18, TMS320C64x_A19,
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TMS320C64x_A20, TMS320C64x_A21, TMS320C64x_A22, TMS320C64x_A23,
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TMS320C64x_A24, TMS320C64x_A25, TMS320C64x_A26, TMS320C64x_A27,
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TMS320C64x_A28, TMS320C64x_A29, TMS320C64x_A30, TMS320C64x_A31
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};
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static const unsigned ControlRegsDecoderTable[] = {
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TMS320C64x_AMR, TMS320C64x_CSR, TMS320C64x_ISR, TMS320C64x_ICR,
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TMS320C64x_IER, TMS320C64x_ISTP, TMS320C64x_IRP, TMS320C64x_NRP,
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~0U, ~0U, TMS320C64x_TSCL, TMS320C64x_TSCH,
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~0U, TMS320C64x_ILC, TMS320C64x_RILC, TMS320C64x_REP,
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TMS320C64x_PCE1, TMS320C64x_DNUM, ~0U, ~0U,
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~0U, TMS320C64x_SSR, TMS320C64x_GPLYA, TMS320C64x_GPLYB,
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TMS320C64x_GFPGFR, TMS320C64x_DIER, TMS320C64x_TSR, TMS320C64x_ITSR,
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TMS320C64x_NTSR, TMS320C64x_ECR, ~0U, TMS320C64x_IERR
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};
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static uint64_t getFeatureBits(int mode)
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{
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// support everything
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return (uint64_t)-1;
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}
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static unsigned getReg(const unsigned *RegTable, unsigned RegNo)
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{
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if(RegNo > 31)
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return ~0U;
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return RegTable[RegNo];
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}
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static DecodeStatus DecodeGPRegsRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder)
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{
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unsigned Reg;
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if(RegNo > 31)
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return MCDisassembler_Fail;
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Reg = getReg(GPRegsDecoderTable, RegNo);
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if(Reg == ~0U)
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return MCDisassembler_Fail;
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MCOperand_CreateReg0(Inst, Reg);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeControlRegsRegisterClass(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder)
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{
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unsigned Reg;
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if(RegNo > 31)
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return MCDisassembler_Fail;
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Reg = getReg(ControlRegsDecoderTable, RegNo);
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if(Reg == ~0U)
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return MCDisassembler_Fail;
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MCOperand_CreateReg0(Inst, Reg);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeScst5(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 5 bit value */
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if(imm & (1 << (5 - 1)))
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imm |= ~((1 << 5) - 1);
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MCOperand_CreateImm0(Inst, imm);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeScst16(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 16 bit value */
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if(imm & (1 << (16 - 1)))
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imm |= ~((1 << 16) - 1);
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MCOperand_CreateImm0(Inst, imm);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodePCRelScst7(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 7 bit value */
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if(imm & (1 << (7 - 1)))
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imm |= ~((1 << 7) - 1);
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/* Address is relative to the address of the first instruction in the fetch packet */
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MCOperand_CreateImm0(Inst, (Address & ~31) + (imm * 4));
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodePCRelScst10(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 10 bit value */
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if(imm & (1 << (10 - 1)))
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imm |= ~((1 << 10) - 1);
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/* Address is relative to the address of the first instruction in the fetch packet */
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MCOperand_CreateImm0(Inst, (Address & ~31) + (imm * 4));
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodePCRelScst12(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 12 bit value */
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if(imm & (1 << (12 - 1)))
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imm |= ~((1 << 12) - 1);
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/* Address is relative to the address of the first instruction in the fetch packet */
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MCOperand_CreateImm0(Inst, (Address & ~31) + (imm * 4));
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodePCRelScst21(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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int32_t imm;
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imm = Val;
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/* Sign extend 21 bit value */
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if(imm & (1 << (21 - 1)))
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imm |= ~((1 << 21) - 1);
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/* Address is relative to the address of the first instruction in the fetch packet */
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MCOperand_CreateImm0(Inst, (Address & ~31) + (imm * 4));
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeMemOperand(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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return DecodeMemOperandSc(Inst, Val | (1 << 15), Address, Decoder);
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}
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static DecodeStatus DecodeMemOperandSc(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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uint8_t scaled, base, offset, mode, unit;
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unsigned basereg, offsetreg;
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scaled = (Val >> 15) & 1;
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base = (Val >> 10) & 0x1f;
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offset = (Val >> 5) & 0x1f;
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mode = (Val >> 1) & 0xf;
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unit = Val & 1;
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if((base >= TMS320C64X_REG_A0) && (base <= TMS320C64X_REG_A31))
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base = (base - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
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else if((base >= TMS320C64X_REG_B0) && (base <= TMS320C64X_REG_B31))
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base = (base - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
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basereg = getReg(GPRegsDecoderTable, base);
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if (basereg == ~0U)
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return MCDisassembler_Fail;
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switch(mode) {
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case 0:
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case 1:
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case 8:
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case 9:
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case 10:
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case 11:
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MCOperand_CreateImm0(Inst, (scaled << 19) | (basereg << 12) | (offset << 5) | (mode << 1) | unit);
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break;
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case 4:
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case 5:
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case 12:
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case 13:
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case 14:
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case 15:
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if((offset >= TMS320C64X_REG_A0) && (offset <= TMS320C64X_REG_A31))
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offset = (offset - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
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else if((offset >= TMS320C64X_REG_B0) && (offset <= TMS320C64X_REG_B31))
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offset = (offset - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
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offsetreg = getReg(GPRegsDecoderTable, offset);
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if (offsetreg == ~0U)
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return MCDisassembler_Fail;
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MCOperand_CreateImm0(Inst, (scaled << 19) | (basereg << 12) | (offsetreg << 5) | (mode << 1) | unit);
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break;
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default:
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return MCDisassembler_Fail;
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}
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeMemOperand2(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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uint16_t offset;
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unsigned basereg;
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if(Val & 1)
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basereg = TMS320C64X_REG_B15;
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else
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basereg = TMS320C64X_REG_B14;
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offset = (Val >> 1) & 0x7fff;
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MCOperand_CreateImm0(Inst, (offset << 7) | basereg);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeRegPair5(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder)
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{
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unsigned Reg;
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if(RegNo > 31)
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return MCDisassembler_Fail;
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Reg = getReg(GPRegsDecoderTable, RegNo);
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MCOperand_CreateReg0(Inst, Reg);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeRegPair4(MCInst *Inst, unsigned RegNo,
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uint64_t Address, void *Decoder)
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{
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unsigned Reg;
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if(RegNo > 15)
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return MCDisassembler_Fail;
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Reg = getReg(GPRegsDecoderTable, RegNo << 1);
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MCOperand_CreateReg0(Inst, Reg);
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return MCDisassembler_Success;
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}
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static DecodeStatus DecodeCondRegister(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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DecodeStatus ret = MCDisassembler_Success;
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if(!Inst->flat_insn->detail)
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return MCDisassembler_Success;
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switch(Val) {
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case 0:
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case 7:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_INVALID;
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break;
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case 1:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_B0;
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break;
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case 2:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_B1;
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break;
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case 3:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_B2;
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break;
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case 4:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_A1;
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break;
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case 5:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_A2;
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break;
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case 6:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_A0;
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break;
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default:
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Inst->flat_insn->detail->tms320c64x.condition.reg = TMS320C64X_REG_INVALID;
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ret = MCDisassembler_Fail;
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break;
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}
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return ret;
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}
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static DecodeStatus DecodeCondRegisterZero(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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DecodeStatus ret = MCDisassembler_Success;
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if(!Inst->flat_insn->detail)
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return MCDisassembler_Success;
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switch(Val) {
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case 0:
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Inst->flat_insn->detail->tms320c64x.condition.zero = 0;
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break;
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case 1:
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Inst->flat_insn->detail->tms320c64x.condition.zero = 1;
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break;
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default:
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Inst->flat_insn->detail->tms320c64x.condition.zero = 0;
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ret = MCDisassembler_Fail;
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break;
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}
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return ret;
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}
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static DecodeStatus DecodeSide(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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DecodeStatus ret = MCDisassembler_Success;
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MCOperand *op;
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int i;
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/* This is pretty messy, probably we should find a better way */
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if(Val == 1) {
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for(i = 0; i < Inst->size; i++) {
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op = &Inst->Operands[i];
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if(op->Kind == kRegister) {
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if((op->RegVal >= TMS320C64X_REG_A0) && (op->RegVal <= TMS320C64X_REG_A31))
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op->RegVal = (op->RegVal - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
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else if((op->RegVal >= TMS320C64X_REG_B0) && (op->RegVal <= TMS320C64X_REG_B31))
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op->RegVal = (op->RegVal - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
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}
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}
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}
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if(!Inst->flat_insn->detail)
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return MCDisassembler_Success;
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switch(Val) {
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case 0:
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Inst->flat_insn->detail->tms320c64x.funit.side = 1;
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break;
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case 1:
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Inst->flat_insn->detail->tms320c64x.funit.side = 2;
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break;
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default:
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Inst->flat_insn->detail->tms320c64x.funit.side = 0;
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ret = MCDisassembler_Fail;
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break;
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}
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return ret;
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}
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static DecodeStatus DecodeParallel(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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DecodeStatus ret = MCDisassembler_Success;
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if(!Inst->flat_insn->detail)
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return MCDisassembler_Success;
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switch(Val) {
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case 0:
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Inst->flat_insn->detail->tms320c64x.parallel = 0;
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break;
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case 1:
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Inst->flat_insn->detail->tms320c64x.parallel = 1;
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break;
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default:
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Inst->flat_insn->detail->tms320c64x.parallel = -1;
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ret = MCDisassembler_Fail;
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break;
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}
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return ret;
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}
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static DecodeStatus DecodeCrosspathX1(MCInst *Inst, unsigned Val,
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uint64_t Address, void *Decoder)
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{
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DecodeStatus ret = MCDisassembler_Success;
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MCOperand *op;
|
|
|
|
if(!Inst->flat_insn->detail)
|
|
return MCDisassembler_Success;
|
|
|
|
switch(Val) {
|
|
case 0:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 0;
|
|
break;
|
|
case 1:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 1;
|
|
op = &Inst->Operands[0];
|
|
if(op->Kind == kRegister) {
|
|
if((op->RegVal >= TMS320C64X_REG_A0) && (op->RegVal <= TMS320C64X_REG_A31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
|
|
else if((op->RegVal >= TMS320C64X_REG_B0) && (op->RegVal <= TMS320C64X_REG_B31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
|
|
}
|
|
break;
|
|
default:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = -1;
|
|
ret = MCDisassembler_Fail;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static DecodeStatus DecodeCrosspathX2(MCInst *Inst, unsigned Val,
|
|
uint64_t Address, void *Decoder)
|
|
{
|
|
DecodeStatus ret = MCDisassembler_Success;
|
|
MCOperand *op;
|
|
|
|
if(!Inst->flat_insn->detail)
|
|
return MCDisassembler_Success;
|
|
|
|
switch(Val) {
|
|
case 0:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 0;
|
|
break;
|
|
case 1:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 1;
|
|
op = &Inst->Operands[1];
|
|
if(op->Kind == kRegister) {
|
|
if((op->RegVal >= TMS320C64X_REG_A0) && (op->RegVal <= TMS320C64X_REG_A31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
|
|
else if((op->RegVal >= TMS320C64X_REG_B0) && (op->RegVal <= TMS320C64X_REG_B31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
|
|
}
|
|
break;
|
|
default:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = -1;
|
|
ret = MCDisassembler_Fail;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static DecodeStatus DecodeCrosspathX3(MCInst *Inst, unsigned Val,
|
|
uint64_t Address, void *Decoder)
|
|
{
|
|
DecodeStatus ret = MCDisassembler_Success;
|
|
MCOperand *op;
|
|
|
|
if(!Inst->flat_insn->detail)
|
|
return MCDisassembler_Success;
|
|
|
|
switch(Val) {
|
|
case 0:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 0;
|
|
break;
|
|
case 1:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = 2;
|
|
op = &Inst->Operands[2];
|
|
if(op->Kind == kRegister) {
|
|
if((op->RegVal >= TMS320C64X_REG_A0) && (op->RegVal <= TMS320C64X_REG_A31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_A0 + TMS320C64X_REG_B0);
|
|
else if((op->RegVal >= TMS320C64X_REG_B0) && (op->RegVal <= TMS320C64X_REG_B31))
|
|
op->RegVal = (op->RegVal - TMS320C64X_REG_B0 + TMS320C64X_REG_A0);
|
|
}
|
|
break;
|
|
default:
|
|
Inst->flat_insn->detail->tms320c64x.funit.crosspath = -1;
|
|
ret = MCDisassembler_Fail;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
|
|
static DecodeStatus DecodeNop(MCInst *Inst, unsigned Val,
|
|
uint64_t Address, void *Decoder)
|
|
{
|
|
MCOperand_CreateImm0(Inst, Val + 1);
|
|
|
|
return MCDisassembler_Success;
|
|
}
|
|
|
|
#define GET_INSTRINFO_ENUM
|
|
#include "TMS320C64xGenInstrInfo.inc"
|
|
|
|
bool TMS320C64x_getInstruction(csh ud, const uint8_t *code, size_t code_len,
|
|
MCInst *MI, uint16_t *size, uint64_t address, void *info)
|
|
{
|
|
uint32_t insn;
|
|
DecodeStatus result;
|
|
|
|
if(code_len < 4) {
|
|
*size = 0;
|
|
return MCDisassembler_Fail;
|
|
}
|
|
|
|
if(MI->flat_insn->detail)
|
|
memset(MI->flat_insn->detail, 0, offsetof(cs_detail, tms320c64x)+sizeof(cs_tms320c64x));
|
|
|
|
insn = (code[3] << 0) | (code[2] << 8) | (code[1] << 16) | ((uint32_t) code[0] << 24);
|
|
result = decodeInstruction_4(DecoderTable32, MI, insn, address, info, 0);
|
|
|
|
if(result == MCDisassembler_Success) {
|
|
*size = 4;
|
|
return true;
|
|
}
|
|
|
|
MCInst_clear(MI);
|
|
*size = 0;
|
|
return false;
|
|
}
|
|
|
|
void TMS320C64x_init(MCRegisterInfo *MRI)
|
|
{
|
|
MCRegisterInfo_InitMCRegisterInfo(MRI, TMS320C64xRegDesc, 90,
|
|
0, 0,
|
|
TMS320C64xMCRegisterClasses, 7,
|
|
0, 0,
|
|
TMS320C64xRegDiffLists,
|
|
0,
|
|
TMS320C64xSubRegIdxLists, 1,
|
|
0);
|
|
}
|
|
|
|
#endif
|