255 lines
7.4 KiB
C
255 lines
7.4 KiB
C
// NOTE: Sim8086
|
|
// ============================================================================
|
|
typedef enum S86_InstructionType {
|
|
S86_InstructionType_MOVRegOrMemToOrFromReg,
|
|
S86_InstructionType_MOVImmediateToRegOrMem,
|
|
S86_InstructionType_MOVImmediateToReg,
|
|
S86_InstructionType_MOVMemToAccum,
|
|
S86_InstructionType_MOVAccumToMem,
|
|
S86_InstructionType_MOVRegOrMemToSegReg,
|
|
S86_InstructionType_MOVSegRegToRegOrMem,
|
|
|
|
S86_InstructionType_PUSHRegOrMem,
|
|
S86_InstructionType_PUSHReg,
|
|
S86_InstructionType_PUSHSegReg,
|
|
|
|
S86_InstructionType_POPRegOrMem,
|
|
S86_InstructionType_POPReg,
|
|
S86_InstructionType_POPSegReg,
|
|
|
|
S86_InstructionType_XCHGRegOrMemWithReg,
|
|
S86_InstructionType_XCHGRegWithAccum,
|
|
|
|
S86_InstructionType_INFixedPort,
|
|
S86_InstructionType_INVariablePort,
|
|
|
|
S86_InstructionType_OUTFixedPort,
|
|
S86_InstructionType_OUTVariablePort,
|
|
|
|
S86_InstructionType_XLAT,
|
|
|
|
S86_InstructionType_LEA,
|
|
S86_InstructionType_LDS,
|
|
S86_InstructionType_LES,
|
|
S86_InstructionType_LAHF,
|
|
S86_InstructionType_SAHF,
|
|
S86_InstructionType_PUSHF,
|
|
S86_InstructionType_POPF,
|
|
|
|
S86_InstructionType_ADDRegOrMemToOrFromReg,
|
|
S86_InstructionType_ADDImmediateToRegOrMem,
|
|
S86_InstructionType_ADDImmediateToAccum,
|
|
|
|
S86_InstructionType_ADCRegOrMemWithRegToEither,
|
|
S86_InstructionType_ADCImmediateToRegOrMem,
|
|
S86_InstructionType_ADCImmediateToAccum,
|
|
|
|
S86_InstructionType_INCRegOrMem,
|
|
S86_InstructionType_INCReg,
|
|
|
|
S86_InstructionType_AAA,
|
|
S86_InstructionType_DAA,
|
|
|
|
S86_InstructionType_SUBRegOrMemToOrFromReg,
|
|
S86_InstructionType_SUBImmediateFromRegOrMem,
|
|
S86_InstructionType_SUBImmediateFromAccum,
|
|
|
|
S86_InstructionType_SBBRegOrMemAndRegToEither,
|
|
S86_InstructionType_SBBImmediateFromRegOrMem,
|
|
S86_InstructionType_SBBImmediateFromAccum,
|
|
|
|
S86_InstructionType_DECRegOrMem,
|
|
S86_InstructionType_DECReg,
|
|
S86_InstructionType_NEG,
|
|
|
|
S86_InstructionType_CMPRegOrMemAndReg,
|
|
S86_InstructionType_CMPImmediateWithRegOrMem,
|
|
S86_InstructionType_CMPImmediateWithAccum,
|
|
|
|
S86_InstructionType_AAS,
|
|
S86_InstructionType_DAS,
|
|
|
|
S86_InstructionType_MUL,
|
|
S86_InstructionType_IMUL,
|
|
S86_InstructionType_AAM,
|
|
S86_InstructionType_DIV,
|
|
S86_InstructionType_IDIV,
|
|
S86_InstructionType_AAD,
|
|
S86_InstructionType_CBW,
|
|
S86_InstructionType_CWD,
|
|
|
|
S86_InstructionType_NOT,
|
|
S86_InstructionType_SHL_SAL,
|
|
S86_InstructionType_SHR,
|
|
S86_InstructionType_SAR,
|
|
S86_InstructionType_ROL,
|
|
S86_InstructionType_ROR,
|
|
S86_InstructionType_RCL,
|
|
S86_InstructionType_RCR,
|
|
|
|
S86_InstructionType_ANDRegWithMemToEither,
|
|
S86_InstructionType_ANDImmediateToRegOrMem,
|
|
S86_InstructionType_ANDImmediateToAccum,
|
|
|
|
S86_InstructionType_TESTRegOrMemAndReg,
|
|
S86_InstructionType_TESTImmediateAndRegOrMem,
|
|
S86_InstructionType_TESTImmediateAndAccum,
|
|
|
|
S86_InstructionType_ORRegOrMemAndRegToEither,
|
|
S86_InstructionType_ORImmediateToRegOrMem,
|
|
S86_InstructionType_ORImmediateToAccum,
|
|
|
|
S86_InstructionType_XORRegOrMemAndRegToEither,
|
|
S86_InstructionType_XORImmediateToRegOrMem,
|
|
S86_InstructionType_XORImmediateToAccum,
|
|
|
|
S86_InstructionType_REP,
|
|
|
|
S86_InstructionType_CALLDirectWithinSeg,
|
|
S86_InstructionType_CALLIndirectWithinSeg,
|
|
S86_InstructionType_CALLDirectInterSeg,
|
|
S86_InstructionType_CALLIndirectInterSeg,
|
|
|
|
S86_InstructionType_JMPDirectWithinSeg,
|
|
S86_InstructionType_JMPDirectWithinSegShort,
|
|
S86_InstructionType_JMPIndirectWithinSeg,
|
|
S86_InstructionType_JMPDirectInterSeg,
|
|
S86_InstructionType_JMPIndirectInterSeg,
|
|
|
|
S86_InstructionType_RETWithinSeg,
|
|
S86_InstructionType_RETWithinSegAddImmediateToSP,
|
|
S86_InstructionType_RETInterSeg,
|
|
S86_InstructionType_RETInterSegAddImmediateToSP,
|
|
|
|
S86_InstructionType_JE_JZ,
|
|
S86_InstructionType_JL_JNGE,
|
|
S86_InstructionType_JLE_JNG,
|
|
S86_InstructionType_JB_JNAE,
|
|
S86_InstructionType_JBE_JNA,
|
|
S86_InstructionType_JP_JPE,
|
|
S86_InstructionType_JO,
|
|
S86_InstructionType_JS,
|
|
S86_InstructionType_JNE_JNZ,
|
|
S86_InstructionType_JNL_JGE,
|
|
S86_InstructionType_JNLE_JG,
|
|
S86_InstructionType_JNB_JAE,
|
|
S86_InstructionType_JNBE_JA,
|
|
S86_InstructionType_JNP_JO,
|
|
S86_InstructionType_JNO,
|
|
S86_InstructionType_JNS,
|
|
S86_InstructionType_LOOP,
|
|
S86_InstructionType_LOOPZ_LOOPE,
|
|
S86_InstructionType_LOOPNZ_LOOPNE,
|
|
S86_InstructionType_JCXZ,
|
|
|
|
S86_InstructionType_INT,
|
|
S86_InstructionType_INT3,
|
|
S86_InstructionType_INTO,
|
|
S86_InstructionType_IRET,
|
|
|
|
S86_InstructionType_CLC,
|
|
S86_InstructionType_CMC,
|
|
S86_InstructionType_STC,
|
|
S86_InstructionType_CLD,
|
|
S86_InstructionType_STD,
|
|
S86_InstructionType_CLI,
|
|
S86_InstructionType_STI,
|
|
S86_InstructionType_HLT,
|
|
S86_InstructionType_WAIT,
|
|
|
|
S86_InstructionType_LOCK,
|
|
S86_InstructionType_SEGMENT,
|
|
|
|
S86_InstructionType_Count,
|
|
} S86_InstructionType;
|
|
|
|
/// Bit patterns and masks for decoding 8086 assembly. 8086 opcodes can be up
|
|
/// to 2 bytes long and mixed with instruction specific control bits. These
|
|
/// masks isolate the opcode bits from the bits can be checked after masking
|
|
/// the binary instruction stream.
|
|
///
|
|
/// Instructions that do not have opcode bits in the 2nd byte will have the mask
|
|
/// set to 0.
|
|
typedef struct S86_Instruction {
|
|
uint8_t op_mask0;
|
|
uint8_t op_bits0;
|
|
uint8_t op_mask1;
|
|
uint8_t op_bits1;
|
|
S86_Str8 mnemonic;
|
|
} S86_Instruction;
|
|
|
|
typedef enum S86_RegisterType {
|
|
S86_RegisterType_AL,
|
|
S86_RegisterType_CL,
|
|
S86_RegisterType_DL,
|
|
S86_RegisterType_BL,
|
|
S86_RegisterType_AH,
|
|
S86_RegisterType_CH,
|
|
S86_RegisterType_DH,
|
|
S86_RegisterType_BH,
|
|
|
|
S86_RegisterType_AX,
|
|
S86_RegisterType_CX,
|
|
S86_RegisterType_DX,
|
|
S86_RegisterType_BX,
|
|
S86_RegisterType_SP,
|
|
S86_RegisterType_BP,
|
|
S86_RegisterType_SI,
|
|
S86_RegisterType_DI,
|
|
|
|
S86_RegisterType_BX_SI,
|
|
S86_RegisterType_BX_DI,
|
|
S86_RegisterType_BP_SI,
|
|
S86_RegisterType_BP_DI,
|
|
|
|
S86_RegisterType_DirectAddress,
|
|
S86_RegisterType_Immediate,
|
|
} S86_RegisterType;
|
|
|
|
typedef enum S86_SegmentRegisterType {
|
|
S86_SegmentRegisterType_Invalid,
|
|
S86_SegmentRegisterType_ES,
|
|
S86_SegmentRegisterType_CS,
|
|
S86_SegmentRegisterType_SS,
|
|
S86_SegmentRegisterType_DS,
|
|
S86_SegmentRegisterType_Count,
|
|
} S86_SegmentRegisterType;
|
|
|
|
typedef struct S86_EffectiveAddressStr8 {
|
|
S86_SegmentRegisterType seg_reg_type;
|
|
S86_RegisterType reg_type;
|
|
int32_t displacement;
|
|
char data[32];
|
|
size_t size;
|
|
bool has_displacement;
|
|
} S86_EffectiveAddressStr8;
|
|
|
|
typedef enum S86_EffectiveAddress {
|
|
S86_EffectiveAddress_None,
|
|
S86_EffectiveAddress_Src,
|
|
S86_EffectiveAddress_Dest,
|
|
} S86_EffectiveAddress;
|
|
|
|
typedef enum S86_WidePrefix {
|
|
S86_WidePrefix_None,
|
|
S86_WidePrefix_Src,
|
|
S86_WidePrefix_Dest,
|
|
} S86_WidePrefix;
|
|
|
|
|
|
typedef struct S86_AsmOp {
|
|
bool effective_addr_wide_prefix;
|
|
S86_EffectiveAddress effective_addr;
|
|
bool has_displacement;
|
|
bool lock;
|
|
bool wide;
|
|
S86_WidePrefix wide_prefix;
|
|
S86_RegisterType src;
|
|
S86_RegisterType dest;
|
|
int32_t displacement;
|
|
int32_t immediate;
|
|
S86_SegmentRegisterType seg_reg;
|
|
} S86_AsmOp;
|
|
|
|
S86_EffectiveAddressStr8 S86_EffectiveAddressCalc(S86_BufferIterator *buffer_it, uint8_t rm, uint8_t mod, uint8_t w, S86_SegmentRegisterType seg_reg);
|