// MgDisasmBase.cpp: implementation of the CMgDisasmBase class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "MgAsmCom.h"
#include "MgAsmComDef.h"



//-------------------------------------------------------------------------------------------------------------------------
//全局变量声明:


// Bit combinations that can be potentially dangerous when executed:
t_cmddata g_Dangerous[] =
{
	{ 0x00FFFF, 0x00DCF7, 0, 0, 0, 0, 0, C_DANGER95, "Win95/98 may crash when NEG ESP is executed" },
	{ 0x00FFFF, 0x00D4F7, 0, 0, 0, 0, 0, C_DANGER95, "Win95/98 may crash when NOT ESP is executed" },
	{ 0x00FFFF, 0x0020CD, 0, 0, 0, 0, 0, C_DANGER95, "Win95/98 may crash when VxD call is executed in user mode" },
	{ 0xF8FFFF, 0xC8C70F, 0, 0, 0, 0, 1, C_DANGERLOCK, "LOCK CMPXCHG8B may crash some processors when executed" },
	{ 0x000000, 0x000000, 0, 0, 0, 0, 0, 0, "" }
};

//-------------------------------------------------------------------------------------------------------------------------
//
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CMgDisasmBase::CMgDisasmBase()
{
	//
	m_pDisasm = NULL;

	//
	m_pCmd = NULL;            // Pointer to binary data
	m_pPFixup = NULL;            // Pointer to possible fixups or NULL
	m_ulSize = 0;               // Remaining size of the command buffer
	m_nMode = 0;               // Disassembly mode (DISASM_xxx)

	//
	m_ulDataSize = 0;			// Size of data (1,2,4 bytes)
	m_ulAddrSize = 0;			// Size of address (2 or 4 bytes)

	//
	m_nSegPrefix = 0;			// Segment override prefix or SEG_UNDEF
	m_nHasRM = 0;			// Command has ModR/M byte
	m_nHasSIB = 0;			// Command has SIB byte
	m_nDispSize = 0;			// Size of displacement (if any)
	m_nImmSize = 0;			// Size of immediate data (if any)
	m_nSoftError = 0;			// Noncritical disassembler error
	m_nDump = 0;           // Current length of command dump
	m_nResult = 0;           // Current length of disassembly
	m_nAddComment = 0;			// Comment value of operand


	//
	m_nIDEAL = 0;         // Force IDEAL decoding mode
	m_nLowercase = 0;         // Force lowercase display
	m_nTabArguments = 1;         // Tab between mnemonic and arguments
	m_nExtraSpace = 0;         // Extra space between arguments
	m_nPutDefSeg = 0;         // Display default segments in listing
	m_nShowMemSize = 0;         // Always show memory size
	m_nShowNEAR = 0;         // Show NEAR modifiers
	m_nShortStringCmds = 0;         // Use short form of string commands
	m_nSizeSens = 0;         // How to decode size-sensitive mnemonics
	m_nSymbolic = 0;         // Show symbolic addresses in disasm
	m_nFarCalls = 0;         // Accept far calls, returns & addresses
	m_nDecodeVxd = 0;         // Decode VxD calls (Win95/98)
	m_nPrivileged = 0;         // Accept privileged commands
	m_nIOCommand = 0;         // Accept I/O commands
	m_nBadShift = 0;         // Accept shift out of range 1..31
	m_nExtraPrefix = 0;         // Accept superfluous prefixes
	m_nLockedbus = 0;         // Accept LOCK prefixes
	m_nStackAlign = 0;         // Accept unaligned stack operations
	m_nIsWindowsNT = 0;         // When checking for dangers, assume NT

}

CMgDisasmBase::~CMgDisasmBase()
{

}

//----------------------------------------------------------------------------
// Disassemble name of 1, 2 or 4-byte general-purpose integer register and, if
// requested and available, dump its contents. Parameter type changes decoding
// of contents for some operand types.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeRG(int index, int datasize, int type)
{
	int sizeindex;
	char name[9];
	if (m_nMode < DISASM_DATA)
	{
		return;    // No need to decode
	}

	index &= 0x07;

	if (m_ulDataSize == 1)
	{
		sizeindex = 0;
	}
	else if (m_ulDataSize == 2)
	{
		sizeindex = 1;
	}
	else if (m_ulDataSize == 4)
	{
		sizeindex = 2;
	}
	else
	{
		m_pDisasm->error = DAE_INTERN;
		return;
	}

	if (m_nMode >= DISASM_FILE)
	{
		strcpy(name, g_szRegName[sizeindex][index]);
		if (m_nLowercase)
		{
			strlwr(name);
		}
		if (type < PSEUDOOP)               // Not a pseudooperand
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s"), name);
		}
	}
}

//----------------------------------------------------------------------------
// Disassemble name of 80-bit floating-point register and, if available, dump
// its contents.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeST(int index, int pseudoop)
{
	int i;
	char s[32];
	if (m_nMode < DISASM_FILE)
	{
		return;    // No need to decode
	}

	index &= 0x07;

	i = sprintf(s, ("%s(%i)"), (m_nLowercase ? ("st") : ("ST")), index);
	if (pseudoop == 0)
	{
		strcpy(m_pDisasm->result + m_nResult, s);
		m_nResult += i;
	};
}


//----------------------------------------------------------------------------
// Disassemble name of 64-bit MMX register.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeMX(int index)
{
	char* pr;
	if (m_nMode < DISASM_FILE)
	{
		return;    // No need to decode
	}
	index &= 0x07;
	pr = m_pDisasm->result + m_nResult;
	m_nResult += sprintf(pr, ("%s%i"), (m_nLowercase ? ("mm") : ("MM")), index);
}

//----------------------------------------------------------------------------
// Disassemble name of 64-bit 3DNow! register and, if available, dump its
// contents.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeNR(int index)
{
	char* pr;
	if (m_nMode < DISASM_FILE)
	{
		return;    // No need to decode
	}
	index &= 0x07;
	pr = m_pDisasm->result + m_nResult;
	m_nResult += sprintf(pr, ("%s%i"), (m_nLowercase ? ("mm") : ("MM")), index);
}


//----------------------------------------------------------------------------
// Disassemble memory/register from the ModRM/SIB bytes and, if available, dump
// address and contents of memory.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeMR(int type)
{
	int j, memonly, inmemory, seg;
	int c, sib;
	ulong dsize, regsize, addr;
	char s[TEXTLEN];

	//
	if (m_ulSize < 2)
	{
		m_pDisasm->error = DAE_CROSS;    // ModR/M byte outside the memory block
		return;
	}

	m_nHasRM = 1;
	dsize = regsize = m_ulDataSize;              // Default size of addressed reg/memory
	memonly = 0;                           // Register in ModM field is allowed

	// Size and kind of addressed memory or register in ModM has no influence on
	// the command size, and exact calculations are omitted if only command size
	// is requested. If register is used, optype will be incorrect and we need
	// to correct it later.
	c = m_pCmd[1] & 0xC7;                     // Leave only Mod and M fields

	if (m_nMode >= DISASM_DATA)
	{
		// Register operand
		if ((c & 0xC0) == 0xC0)
		{
			inmemory = 0;
		}
		else
		{
			inmemory = 1;    // Memory operand
		}

		switch (type)
		{
		case MRG:                        // Memory/register in ModRM byte
		{
			if (inmemory)
			{
				if (m_ulDataSize == 1)
				{
					m_pDisasm->memtype = DEC_BYTE;
				}
				else if (m_ulDataSize == 2)
				{
					m_pDisasm->memtype = DEC_WORD;
				}
				else
				{
					m_pDisasm->memtype = DEC_DWORD;
				}
			}
			break;
		}
		case MRJ:                        // Memory/reg in ModRM as JUMP target
		{
			if (m_ulDataSize != 2 && inmemory)
			{
				m_pDisasm->memtype = DEC_DWORD;
			}
			if (m_nMode >= DISASM_FILE && m_nShowNEAR != 0)
			{
				m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s "), (m_nLowercase ? ("near") : ("NEAR")));
			}
			break;
		}
		case MR1:                        // 1-byte memory/register in ModRM byte
		{
			dsize = regsize = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_BYTE;
			}
			break;
		}
		case MR2:                        // 2-byte memory/register in ModRM byte
		{
			dsize = regsize = 2;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_WORD;
			}
			break;
		}
		case MR4:                        // 4-byte memory/register in ModRM byte
		case RR4:                        // 4-byte memory/register (register only)
		{
			dsize = regsize = 4;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_DWORD;
			}
			break;
		}
		case MR8:                        // 8-byte memory/MMX register in ModRM
		case RR8:                        // 8-byte MMX register only in ModRM
		{
			dsize = 8;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_QWORD;
			}
			break;
		}
		case MRD:                        // 8-byte memory/3DNow! register in ModRM
		case RRD:                        // 8-byte memory/3DNow! (register only)
		{
			dsize = 8;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_3DNOW;
			}
			break;
		}
		case MMA:                        // Memory address in ModRM byte for LEA
		{
			memonly = 1;
			break;
		}
		case MML:                        // Memory in ModRM byte (for LES)
		{
			dsize = m_ulDataSize + 2;
			memonly = 1;
			if (m_ulDataSize == 4 && inmemory)
			{
				m_pDisasm->memtype = DEC_FWORD;
			}
			m_pDisasm->warnings |= DAW_SEGMENT;
			break;
		}
		case MMS:                        // Memory in ModRM byte (as SEG:OFFS)
		{
			dsize = m_ulDataSize + 2;
			memonly = 1;
			if (m_ulDataSize == 4 && inmemory)
			{
				m_pDisasm->memtype = DEC_FWORD;
			}
			if (m_nMode >= DISASM_FILE)
			{
				m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s "), (m_nLowercase ? ("far") : ("FAR")));
			}
			break;
		}
		case MM6:                        // Memory in ModRM (6-byte descriptor)
		{
			dsize = 6;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_FWORD;
			}
			break;
		}
		case MMB:                        // Two adjacent memory locations (BOUND)
		{
			dsize = (m_nIDEAL ? m_ulDataSize : m_ulDataSize * 2);
			memonly = 1;
			break;
		}
		case MD2:                        // Memory in ModRM byte (16-bit integer)
		case MB2:                        // Memory in ModRM byte (16-bit binary)
		{
			dsize = 2;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_WORD;
			}
			break;
		}
		case MD4:                        // Memory in ModRM byte (32-bit integer)
		{
			dsize = 4;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_DWORD;
			}
			break;
		}
		case MD8:                        // Memory in ModRM byte (64-bit integer)
		{
			dsize = 8;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_QWORD;
			}
			break;
		}
		case MDA:                        // Memory in ModRM byte (80-bit BCD)
		{
			dsize = 10;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_TBYTE;
			}
			break;
		}
		case MF4:                        // Memory in ModRM byte (32-bit float)
		{
			dsize = 4;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_FLOAT4;
			}
			break;
		}
		case MF8:                        // Memory in ModRM byte (64-bit float)
		{
			dsize = 8;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_FLOAT8;
			}
			break;
		}
		case MFA:                        // Memory in ModRM byte (80-bit float)
		{
			dsize = 10;
			memonly = 1;
			if (inmemory)
			{
				m_pDisasm->memtype = DEC_FLOAT10;
			}
			break;
		}
		case MFE:                        // Memory in ModRM byte (FPU environment)
		{
			dsize = 28;
			memonly = 1;
			break;
		}
		case MFS:                        // Memory in ModRM byte (FPU state)
		{
			dsize = 108;
			memonly = 1;
			break;
		}
		case MFX:                        // Memory in ModRM byte (ext. FPU state)
		{
			dsize = 512;
			memonly = 1;
			break;
		}
		default:                         // Operand is not in ModM!
		{
			m_pDisasm->error = DAE_INTERN;
			break;
		}
		}
	}

	addr = 0;

	// There are many possibilities to decode ModM/SIB address. The first
	// possibility is register in ModM - general-purpose, MMX or 3DNow!
	if ((c & 0xC0) == 0xC0)            // Decode register operand
	{
		if (type == MR8 || type == RR8)
		{
			DecodeMX(c);    // MMX register
		}
		else if (type == MRD || type == RRD)
		{
			DecodeNR(c);    // 3DNow! register
		}
		else
		{
			DecodeRG(c, regsize, type);    // General-purpose register
		}

		//
		if (memonly != 0)
		{
			m_nSoftError = DAE_MEMORY;     // Register where only memory allowed
		}
		return;
	}


	// Next possibility: 16-bit addressing mode, very seldom in 32-bit flat model
	// but still supported by processor. SIB byte is never used here.
	if (m_ulAddrSize == 2)
	{
		if (c == 0x06)                    // Special case of immediate address
		{
			m_nDispSize = 2;
			if (m_ulSize < 4)
			{
				m_pDisasm->error = DAE_CROSS;    // Disp16 outside the memory block
			}
			else if (m_nMode >= DISASM_DATA)
			{
				m_pDisasm->adrconst = addr = *(ushort*)(m_pCmd + 2);
				if (addr == 0)
				{
					m_pDisasm->zeroconst = 1;
				}
				seg = SEG_DS;
				Memadr(seg, (""), addr, dsize);
			}
		}
		else
		{
			m_pDisasm->indexed = 1;
			if ((c & 0xC0) == 0x40)       // 8-bit signed displacement
			{
				if (m_ulSize < 3)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					addr = (signed char)m_pCmd[2] & 0xFFFF;
				}
				m_nDispSize = 1;
			}
			else if ((c & 0xC0) == 0x80)     // 16-bit unsigned displacement
			{
				if (m_ulSize < 4)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					addr = *(ushort*)(m_pCmd + 2);
				}
				m_nDispSize = 2;
			}

			if (m_nMode >= DISASM_DATA && m_pDisasm->error == DAE_NOERR)
			{
				m_pDisasm->adrconst = addr;
				if (addr == 0)
				{
					m_pDisasm->zeroconst = 1;
				}
				seg = g_addr16[c & 0x07].defseg;
				Memadr(seg, g_addr16[c & 0x07].descr, addr, dsize);
			}
		}
	}

	// Next possibility: immediate 32-bit address.
	else if (c == 0x05)                  // Special case of immediate address
	{
		m_nDispSize = 4;
		if (m_ulSize < 6)
		{
			m_pDisasm->error = DAE_CROSS;    // Disp32 outside the memory block
		}
		else if (m_nMode >= DISASM_DATA)
		{
			m_pDisasm->adrconst = addr = *(ulong*)(m_pCmd + 2);
			if (m_pPFixup == NULL)
			{
				m_pPFixup = m_pCmd + 2;
			}
			m_pDisasm->fixupsize += 4;
			if (addr == 0)
			{
				m_pDisasm->zeroconst = 1;
			}
			seg = SEG_DS;
			Memadr(seg, (""), addr, dsize);
		}
	}

	// Next possibility: 32-bit address with SIB byte.
	else if ((c & 0x07) == 0x04)         // SIB addresation
	{
		sib = m_pCmd[2];
		m_nHasSIB = 1;
		*s = '\0';
		if (c == 0x04 && (sib & 0x07) == 0x05)
		{
			m_nDispSize = 4;                    // Immediate address without base
			if (m_ulSize < 7)
			{
				m_pDisasm->error = DAE_CROSS;          // Disp32 outside the memory block
			}
			else
			{
				m_pDisasm->adrconst = addr = *(ulong*)(m_pCmd + 3);
				if (m_pPFixup == NULL)
				{
					m_pPFixup = m_pCmd + 3;
				}
				m_pDisasm->fixupsize += 4;
				if (addr == 0)
				{
					m_pDisasm->zeroconst = 1;
				}
				if ((sib & 0x38) != 0x20)     // Index register present
				{
					m_pDisasm->indexed = 1;
					if (type == MRJ)
					{
						m_pDisasm->jmptable = addr;
					}
				}
				seg = SEG_DS;
			}
		}
		else                                // Base and, eventually, displacement
		{
			if ((c & 0xC0) == 0x40)         // 8-bit displacement
			{
				m_nDispSize = 1;
				if (m_ulSize < 4)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					m_pDisasm->adrconst = addr = (signed char)m_pCmd[3];
					if (addr == 0)
					{
						m_pDisasm->zeroconst = 1;
					}
				}
			}
			else if ((c & 0xC0) == 0x80)      // 32-bit displacement
			{
				m_nDispSize = 4;
				if (m_ulSize < 7)
				{
					m_pDisasm->error = DAE_CROSS;    // Disp32 outside the memory block
				}
				else
				{
					m_pDisasm->adrconst = addr = *(ulong*)(m_pCmd + 3);
					if (m_pPFixup == NULL)
					{
						m_pPFixup = m_pCmd + 3;
					}
					m_pDisasm->fixupsize += 4;
					if (addr == 0)
					{
						m_pDisasm->zeroconst = 1;
					}

					// Most compilers use address of type [index*4+displacement] to
					// address jump table (switch). But, for completeness, I allow all
					// cases which include index with scale 1 or 4, base or both.
					if (type == MRJ)
					{
						m_pDisasm->jmptable = addr;
					}
				}
			}
			m_pDisasm->indexed = 1;
			j = sib & 0x07;
			if (m_nMode >= DISASM_FILE)
			{
				strcpy(s, g_szRegName[2][j]);
				seg = g_addr32[j].defseg;
			}
		}
		if ((sib & 0x38) != 0x20)          // Scaled index present
		{
			if ((sib & 0xC0) == 0x40)
			{
				m_pDisasm->indexed = 2;
			}
			else if ((sib & 0xC0) == 0x80)
			{
				m_pDisasm->indexed = 4;
			}
			else if ((sib & 0xC0) == 0xC0)
			{
				m_pDisasm->indexed = 8;
			}
			else
			{
				m_pDisasm->indexed = 1;
			}
		}
		if (m_nMode >= DISASM_FILE && m_pDisasm->error == DAE_NOERR)
		{
			if ((sib & 0x38) != 0x20)        // Scaled index present
			{
				if (*s != '\0')
				{
					strcat(s, ("+"));
				}
				strcat(s, g_addr32[(sib >> 3) & 0x07].descr);
				if ((sib & 0xC0) == 0x40)
				{
					m_pDisasm->jmptable = 0;            // Hardly a switch!
					strcat(s, ("*2"));
				}
				else if ((sib & 0xC0) == 0x80)
				{
					strcat(s, ("*4"));
				}
				else if ((sib & 0xC0) == 0xC0)
				{
					m_pDisasm->jmptable = 0;            // Hardly a switch!
					strcat(s, ("*8"));
				}
			}
			Memadr(seg, s, addr, dsize);
		}
	}

	// Last possibility: 32-bit address without SIB byte.
	else                                 // No SIB
	{
		if ((c & 0xC0) == 0x40)
		{
			m_nDispSize = 1;
			if (m_ulSize < 3)
			{
				m_pDisasm->error = DAE_CROSS;    // Disp8 outside the memory block
			}
			else
			{
				m_pDisasm->adrconst = addr = (signed char)m_pCmd[2];
				if (addr == 0)
				{
					m_pDisasm->zeroconst = 1;
				}
			}
		}
		else if ((c & 0xC0) == 0x80)
		{

			m_nDispSize = 4;
			if (m_ulSize < 6)
			{
				m_pDisasm->error = DAE_CROSS;    // Disp32 outside the memory block
			}
			else
			{
				m_pDisasm->adrconst = addr = *(ulong*)(m_pCmd + 2);
				if (m_pPFixup == NULL)
				{
					m_pPFixup = m_pCmd + 2;
				}
				m_pDisasm->fixupsize += 4;
				if (addr == 0)
				{
					m_pDisasm->zeroconst = 1;
				}
				if (type == MRJ)
				{
					m_pDisasm->jmptable = addr;
				}
			}
		}
		m_pDisasm->indexed = 1;
		if (m_nMode >= DISASM_FILE && m_pDisasm->error == DAE_NOERR)
		{
			seg = g_addr32[c & 0x07].defseg;
			Memadr(seg, g_addr32[c & 0x07].descr, addr, dsize);
		}
	}

}


//----------------------------------------------------------------------------
// Disassemble implicit source of string operations and, if available, dump
// address and contents.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeSO(void)
{

	if (m_nMode < DISASM_FILE)
	{
		return;    // No need to decode
	}
	if (m_ulDataSize == 1)
	{
		m_pDisasm->memtype = DEC_BYTE;
	}
	else if (m_ulDataSize == 2)
	{
		m_pDisasm->memtype = DEC_WORD;
	}
	else if (m_ulDataSize == 4)
	{
		m_pDisasm->memtype = DEC_DWORD;
	}
	m_pDisasm->indexed = 1;
	Memadr(SEG_DS, g_szRegName[m_ulAddrSize == 2 ? 1 : 2][REG_ESI], 0L, m_ulDataSize);
}


//----------------------------------------------------------------------------
// Disassemble implicit destination of string operations and, if available,
// dump address and contents. Destination always uses segment ES, and this
// setting cannot be overridden.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeDE(void)
{
	int seg;
	if (m_nMode < DISASM_FILE)
	{
		return;     // No need to decode
	}
	if (m_ulDataSize == 1)
	{
		m_pDisasm->memtype = DEC_BYTE;
	}
	else if (m_ulDataSize == 2)
	{
		m_pDisasm->memtype = DEC_WORD;
	}
	else if (m_ulDataSize == 4)
	{
		m_pDisasm->memtype = DEC_DWORD;
	}
	m_pDisasm->indexed = 1;
	seg = m_nSegPrefix;
	m_nSegPrefix = SEG_ES;   // Fake Memadr by changing segment prefix
	Memadr(SEG_DS, g_szRegName[m_ulAddrSize == 2 ? 1 : 2][REG_EDI], 0L, m_ulDataSize);
	m_nSegPrefix = seg;                     // Restore segment prefix
}


//----------------------------------------------------------------------------
// Decode XLAT operand and, if available, dump address and contents.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeXL(void)
{
	if (m_nMode < DISASM_FILE)
	{
		return;    // No need to decode
	}
	m_pDisasm->memtype = DEC_BYTE;
	m_pDisasm->indexed = 1;
	Memadr(SEG_DS, (m_ulAddrSize == 2 ? ("BX+AL") : ("EBX+AL")), 0L, 1);
}

//----------------------------------------------------------------------------
// Decode immediate operand of size constsize. If sxt is non-zero, byte operand
// should be sign-extended to sxt bytes. If type of immediate constant assumes
// this, small negative operands may be displayed as signed negative numbers.
// Note that in most cases immediate operands are not shown in comment window.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeIM(int constsize, int sxt, int type)
{
	int i;
	signed long data;
	ulong l;
	char name[TEXTLEN] = { 0 }, comment[TEXTLEN] = { 0 };

	//
	m_nImmSize += constsize;                    // Allows several immediate operands
	if (m_nMode < DISASM_DATA)
	{
		return;
	}

	l = 1 + m_nHasRM + m_nHasSIB + m_nDispSize + (m_nImmSize - constsize);
	data = 0;

	//
	if (m_ulSize < l + constsize)
	{
		m_pDisasm->error = DAE_CROSS;
	}
	else if (constsize == 1)
	{
		if (sxt == 0)
		{
			data = (uchar)m_pCmd[l];
		}
		else
		{
			data = (signed char)m_pCmd[l];
		}
		if (type == IMS && ((data & 0xE0) != 0 || data == 0))
		{
			m_pDisasm->warnings |= DAW_SHIFT;
			m_pDisasm->cmdtype |= C_RARE;
		}
	}
	else if (constsize == 2)
	{
		if (sxt == 0)
		{
			data = *(ushort*)(m_pCmd + l);
		}
		else
		{
			data = *(short*)(m_pCmd + l);
		}
	}
	else
	{
		data = *(long*)(m_pCmd + l);
		if (m_pPFixup == NULL)
		{
			m_pPFixup = m_pCmd + l;
		}
		m_pDisasm->fixupsize += 4;
	}
	if (sxt == 2)
	{
		data &= 0x0000FFFF;
	}
	if (data == 0 && m_pDisasm->error == 0)
	{
		m_pDisasm->zeroconst = 1;
	}
	// Command ENTER, as an exception from Intel's rules, has two immediate
	// constants. As the second constant is rarely used, I exclude it from
	// search if the first constant is non-zero (which is usually the case).
	if (m_pDisasm->immconst == 0)
	{
		m_pDisasm->immconst = data;
	}
	if (m_nMode >= DISASM_FILE && m_pDisasm->error == DAE_NOERR)
	{
		if (m_nMode >= DISASM_CODE && type != IMU)
		{
			i = Decodeaddress(data, name, TEXTLEN - m_nResult - 24, comment);
		}
		else
		{
			i = 0;
			comment[0] = '\0';
		}
		if (i != 0 && m_nSymbolic != 0)
		{
			strcpy(m_pDisasm->result + m_nResult, name);
			m_nResult += i;
		}
		else if (type == IMU || type == IMS || type == IM2 || data >= 0 || data < NEGLIMIT)
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%lX"), data);
		}
		else
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("-%lX"), -data);
		}

		//
		if (m_nAddComment && comment[0] != '\0')
		{
			strcpy(m_pDisasm->comment, comment);
		}
	}
}

//----------------------------------------------------------------------------
// Decode VxD service name (always 4-byte).
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeVX(void)
{
	ulong l, data;

	//
	m_nImmSize += 4;                        // Allows several immediate operands
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	l = 1 + m_nHasRM + m_nHasSIB + m_nDispSize + (m_nImmSize - 4);
	if (m_ulSize < l + 4)
	{
		m_pDisasm->error = DAE_CROSS;
		return;
	}
	data = *(long*)(m_pCmd + l);
	if (data == 0 && m_pDisasm->error == 0)
	{
		m_pDisasm->zeroconst = 1;
	}
	if (m_pDisasm->immconst == 0)
	{
		m_pDisasm->immconst = data;
	}
	if (m_nMode >= DISASM_FILE && m_pDisasm->error == DAE_NOERR)
	{
		if ((data & 0x00008000) != 0 && memicmp(("VxDCall"), m_pDisasm->result, 7) == 0)
		{
			memcpy(m_pDisasm->result, m_nLowercase ? ("vxdjump") : ("VxDJump"), 7);
		}
		m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%lX"), data);
	}
}

//----------------------------------------------------------------------------
// Decode implicit constant 1 (used in shift commands). This operand is so
// insignificant that it is never shown in comment window.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeC1(void)
{
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	m_pDisasm->immconst = 1;
	if (m_nMode >= DISASM_FILE)
	{
		m_nResult += sprintf(m_pDisasm->result + m_nResult, ("1"));
	}
}

//----------------------------------------------------------------------------
// Decode immediate absolute data address. This operand is used in 8080-
// compatible commands which allow to move data from memory to accumulator and
// back. Note that bytes ModRM and SIB never appear in commands with IA operand.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeIA(void)
{
	ulong addr;
	if (m_ulSize < 1 + m_ulAddrSize)
	{
		m_pDisasm->error = DAE_CROSS;
		return;
	}
	m_nDispSize = m_ulAddrSize;
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	if (m_ulDataSize == 1)
	{
		m_pDisasm->memtype = DEC_BYTE;
	}
	else if (m_ulDataSize == 2)
	{
		m_pDisasm->memtype = DEC_WORD;
	}
	else if (m_ulDataSize == 4)
	{
		m_pDisasm->memtype = DEC_DWORD;
	}
	if (m_ulAddrSize == 2)
	{
		addr = *(ushort*)(m_pCmd + 1);
	}
	else
	{
		addr = *(ulong*)(m_pCmd + 1);
		if (m_pPFixup == NULL)
		{
			m_pPFixup = m_pCmd + 1;
		}
		m_pDisasm->fixupsize += 4;
	}
	m_pDisasm->adrconst = addr;
	if (addr == 0)
	{
		m_pDisasm->zeroconst = 1;
	}
	if (m_nMode >= DISASM_FILE)
	{
		Memadr(SEG_DS, (""), addr, m_ulDataSize);
	}
}

//----------------------------------------------------------------------------
// Decodes jump relative to nextip of size offsize.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeRJ(ulong offsize, ulong nextip)
{
	int i;
	ulong addr;
	char s[TEXTLEN];

	//
	if (m_ulSize < offsize + 1)
	{
		m_pDisasm->error = DAE_CROSS;
		return;
	}

	m_nDispSize = offsize;                  // Interpret offset as displacement
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	if (offsize == 1)
	{
		addr = (signed char)m_pCmd[1] + nextip;
	}
	else if (offsize == 2)
	{
		addr = *(signed short*)(m_pCmd + 1) + nextip;
	}
	else
	{
		addr = *(ulong*)(m_pCmd + 1) + nextip;
	}

	if (m_ulDataSize == 2)
	{
		addr &= 0xFFFF;
	}
	m_pDisasm->jmpconst = addr;
	if (addr == 0)
	{
		m_pDisasm->zeroconst = 1;
	}
	if (m_nMode >= DISASM_FILE)
	{
		if (offsize == 1)
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s "), (m_nLowercase == 0 ? ("SHORT") : ("short")));
		}
		if (m_nMode >= DISASM_CODE)
		{
			i = Decodeaddress(addr, s, TEXTLEN, m_pDisasm->comment);
		}
		else
		{
			i = 0;
		}

		if (m_nSymbolic == 0 || i == 0)
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%08lX"), addr);
		}
		else
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%.*s"), TEXTLEN - m_nResult - 25, s);
		}
		if (m_nSymbolic == 0 && i != 0 && m_pDisasm->comment[0] == '\0')
		{
			strcpy(m_pDisasm->comment, s);
		}
	}
}

//----------------------------------------------------------------------------
// Decode immediate absolute far jump address. In flat model, such addresses
// are not used (mostly because selector is specified directly in the command),
// so I neither decode as symbol nor comment it. To allow search for selector
// by value, I interprete it as an immediate constant.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeJF(void)
{
	ulong addr, seg;

	//
	if (m_ulSize < 1 + m_ulAddrSize + 2)
	{
		m_pDisasm->error = DAE_CROSS;
		return;
	}
	m_nDispSize = m_ulAddrSize;
	m_nImmSize = 2;      // Non-trivial but allowed interpretation
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	if (m_ulAddrSize == 2)
	{
		addr = *(ushort*)(m_pCmd + 1);
		seg = *(ushort*)(m_pCmd + 3);
	}
	else
	{
		addr = *(ulong*)(m_pCmd + 1);
		seg = *(ushort*)(m_pCmd + 5);
	}

	m_pDisasm->jmpconst = addr;
	m_pDisasm->immconst = seg;
	if (addr == 0 || seg == 0)
	{
		m_pDisasm->zeroconst = 1;
	}
	if (m_nMode >= DISASM_FILE)
	{
		m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s %04X:%08X"), (m_nLowercase == 0 ? ("FAR") : ("far")), seg, addr);
	}
}

//----------------------------------------------------------------------------
// Decode segment register. In flat model, operands of this type are seldom.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeSG(int index)
{
	int i;
	if (m_nMode < DISASM_DATA)
	{
		return;
	}
	index &= 0x07;
	if (index >= 6)
	{
		m_nSoftError = DAE_BADSEG;    // Undefined segment register
	}
	if (m_nMode >= DISASM_FILE)
	{
		i = sprintf(m_pDisasm->result + m_nResult, ("%s"), g_szSegName[index]);
		if (m_nLowercase)
		{
			strlwr(m_pDisasm->result + m_nResult);
		}
		m_nResult += i;
	}
}


//----------------------------------------------------------------------------
// Decode control register addressed in R part of ModRM byte. Operands of
// this type are extremely rare. Contents of control registers are accessible
// only from privilege level 0, so I cannot dump them here.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeCR(int index)
{
	m_nHasRM = 1;
	if (m_nMode >= DISASM_FILE)
	{
		index = (index >> 3) & 0x07;
		m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s"), g_szCRName[index]);
		if (m_nLowercase)
		{
			strlwr(m_pDisasm->result + m_nResult);
		}
	}
}


//----------------------------------------------------------------------------
// Decode debug register addressed in R part of ModRM byte. Operands of
// this type are extremely rare. I can dump only those debug registers
// available in CONTEXT structure.
//----------------------------------------------------------------------------
void CMgDisasmBase::DecodeDR(int index)
{
	int i;
	m_nHasRM = 1;
	if (m_nMode >= DISASM_FILE)
	{
		index = (index >> 3) & 0x07;
		i = sprintf(m_pDisasm->result + m_nResult, ("%s"), g_szDRName[index]);
		if (m_nLowercase)
		{
			strlwr(m_pDisasm->result + m_nResult);
		}
		m_nResult += i;
	}
}

//----------------------------------------------------------------------------
// Service function, adds valid memory adress in MASM or Ideal format to
// disassembled string. Parameters: defseg - default segment for given
// register combination, descr - fully decoded register part of address,
// offset - constant part of address, dsize - data size in bytes. If global
// flag 'symbolic' is set, function also tries to decode offset as name of
// some label.
//----------------------------------------------------------------------------
void CMgDisasmBase::Memadr(int defseg, const char* descr, long offset, int dsize)
{
	int i, n, seg;
	char* pr;
	char s[TEXTLEN];
	if (m_nMode < DISASM_FILE || descr == NULL)
	{
		return;    // No need or possibility to decode
	}

	//
	pr = m_pDisasm->result + m_nResult;
	n = 0;

	//
	if (m_nSegPrefix != SEG_UNDEF)
	{
		seg = m_nSegPrefix;
	}
	else
	{
		seg = defseg;
	}

	//
	if (m_nIDEAL != 0)
	{
		pr[n++] = '[';
	}


	// In some cases Disassembler may omit size of memory operand. Namely, flag
	// showmemsize must be 0, type bit C_EXPL must be 0 (this bit namely means
	// that explicit operand size is necessary) and type of command must not be
	// C_MMX or C_NOW (because bit C_EXPL has in these cases different meaning).
	// Otherwise, exact size must be supplied.
	if (m_nShowMemSize != 0 || (m_pDisasm->cmdtype & C_TYPEMASK) == C_MMX ||
		(m_pDisasm->cmdtype & C_TYPEMASK) == C_NOW || (m_pDisasm->cmdtype & C_EXPL) != 0
		)
	{
		if (dsize < sizeof(g_szSizeName) / sizeof(g_szSizeName[0]))
		{
			n += sprintf(pr + n, ("%s %s"), g_szSizeName[dsize], (m_nIDEAL == 0 ? ("PTR ") : ("")));
		}
		else
		{
			n += sprintf(pr + n, ("(%i-BYTE) %s"), dsize, (m_nIDEAL == 0 ? ("PTR ") : ("")));
		}
	}

	//
	if ((m_nPutDefSeg != 0 || seg != defseg) && seg != SEG_UNDEF)
	{
		n += sprintf(pr + n, ("%s:"), g_szSegName[seg]);
	}

	//
	if (m_nIDEAL == 0)
	{
		pr[n++] = '[';
	}

	//
	n += sprintf(pr + n, ("%s"), descr);
	if (m_nLowercase)
	{
		strlwr(pr);
	}

	//
	if (offset == 0L)
	{
		if (*descr == '\0')
		{
			pr[n++] = '0';
		}
	}
	else
	{
		if (m_nSymbolic && m_nMode >= DISASM_CODE)
		{
			i = Decodeaddress(offset, s, TEXTLEN - n - 24, NULL);
		}
		else
		{
			i = 0;
		}

		//
		if (i > 0)
		{
			// Offset decoded in symbolic form
			if (*descr != '\0')
			{
				pr[n++] = '+';
			}
			strcpy(pr + n, s);
			n += i;
		}
		else if (offset < 0 && offset > -16384 && *descr != '\0')
		{
			n += sprintf(pr + n, ("-%lX"), -offset);
		}
		else
		{
			if (*descr != '\0') pr[n++] = '+';
			n += sprintf(pr + n, ("%lX"), offset);
		}
	}
	pr[n++] = ']';
	pr[n] = '\0';
	m_nResult += n;
}


//----------------------------------------------------------------------------
// Decodes address into symb (nsymb bytes long, including the terminating zero
// character) and comments its possible meaning. Returns number of bytes in
// symb not including terminating zero.
//----------------------------------------------------------------------------
int CMgDisasmBase::Decodeaddress(ulong addr, char* symb, int nsymb, char* comment)
{
	// Environment-specific routine! Do it yourself!

	return 0;
}


//----------------------------------------------------------------------------
// Skips 3DNow! operands and extracts command suffix. Returns suffix or -1 if
// suffix lies outside the memory block. This subroutine assumes that cmd still
// points to the beginning of 3DNow! command (i.e. to the sequence of two bytes
// 0F, 0F).
//----------------------------------------------------------------------------
int CMgDisasmBase::Get3dnowsuffix(void)
{
	int c, sib;
	ulong offset = 3;
	if (m_ulSize < 3)
	{
		return -1;    // Suffix outside the memory block
	}

	c = m_pCmd[2] & 0xC7;                     // Leave only Mod and M fields

	// Register in ModM - general-purpose, MMX or 3DNow!
	if ((c & 0xC0) == 0xC0) {}

	// 16-bit addressing mode, SIB byte is never used here.
	else if (m_ulAddrSize == 2)
	{
		if (c == 0x06)                     // Special case of immediate address
		{
			offset += 2;
		}
		else if ((c & 0xC0) == 0x40)       // 8-bit signed displacement
		{
			offset++;
		}
		else if ((c & 0xC0) == 0x80)       // 16-bit unsigned displacement
		{
			offset += 2;
		}
	}

	// Immediate 32-bit address.
	else if (c == 0x05)                  // Special case of immediate address
	{
		offset += 4;
	}

	// 32-bit address with SIB byte.
	else if ((c & 0x07) == 0x04)       // SIB addresation
	{
		if (m_ulSize < 4)
		{
			return -1;    // Suffix outside the memory block
		}

		//
		sib = m_pCmd[3];
		offset++;

		//
		if (c == 0x04 && (sib & 0x07) == 0x05)
		{
			offset += 4;    // Immediate address without base
		}
		else if ((c & 0xC0) == 0x40)         // 8-bit displacement
		{
			offset += 1;
		}
		else if ((c & 0xC0) == 0x80)         // 32-bit dislacement
		{
			offset += 4;
		}
	}

	// 32-bit address without SIB byte
	else if ((c & 0xC0) == 0x40)
	{
		offset += 1;
	}
	else if ((c & 0xC0) == 0x80)
	{
		offset += 4;
	}

	//
	if (offset >= m_ulSize)
	{
		return -1;    // Suffix outside the memory block
	}
	return m_pCmd[offset];
}

//--------------------------------------------------------------------------------
// Function attempts to calculate address of assembler instruction which is n
// lines back in the listing. Maximal stepback is limited to 127. In general,
// this is rather non-trivial task. Proposed solution may cause problems which
// however are not critical here.
//--------------------------------------------------------------------------------
ulong CMgDisasmBase::Disassembleback(char* block, ulong base, ulong size, ulong ip, int n)
{
	int i;
	ulong abuf[131], addr, back, cmdsize;
	char* pdata;
	t_disasm da;

	//
	if (block == NULL)
	{
		return 0;    // Error, no code!
	}
	if (n < 0)
	{
		n = 0;    // Try to correct obvious errors
	}
	else if (n > 127)
	{
		n = 127;
	}
	if (ip > base + size)
	{
		ip = base + size;
	}
	if (n == 0)
	{
		return ip;    // Obvious answers
	}
	if (ip <= base + n)
	{
		return base;
	}

	back = MAXCMDSIZE * (n + 3);         // Command length limited to MAXCMDSIZE

	if (ip < base + back)
	{
		back = ip - base;
	}

	addr = ip - back;
	pdata = block + (addr - base);

	for (i = 0; addr < ip; i++)
	{
		abuf[i % 128] = addr;
		cmdsize = Disasm(pdata, back, addr, &da, DISASM_SIZE);
		pdata += cmdsize;
		addr += cmdsize;
		back -= cmdsize;
	}
	if (i < n)
	{
		return abuf[0];
	}
	else
	{
		return abuf[(i - n + 128) % 128];
	}
}

//--------------------------------------------------------------------------------
// Function attempts to calculate address of assembler instruction which is n
// lines forward in the listing.
//--------------------------------------------------------------------------------
ulong		CMgDisasmBase::Disassembleforward(char* block, ulong base, ulong size, ulong ip, int n)
{
	int i;
	ulong cmdsize;
	char* pdata;
	t_disasm da;
	if (block == NULL)
	{
		return 0;    // Error, no code!
	}
	if (ip < base)
	{
		ip = base;    // Try to correct obvious errors
	}
	if (ip > base + size)
	{
		ip = base + size;
	}
	if (n <= 0)
	{
		return ip;
	}

	//
	pdata = block + (ip - base);
	size -= (ip - base);

	//
	for (i = 0; i < n && size > 0; i++)
	{
		cmdsize = Disasm(pdata, size, ip, &da, DISASM_SIZE);
		pdata += cmdsize;
		ip += cmdsize;
		size -= cmdsize;
	}
	return ip;
}

//----------------------------------------------------------------------------
//
//
//----------------------------------------------------------------------------
ulong		CMgDisasmBase::Disasm(char* src, ulong srcsize, ulong srcip, t_disasm* disasm, int disasmmode)
{
	//
	int		nIsPrefix = 0;
	int		nRepeated = 0;
	int		nLockPrefix = 0;                      // Non-zero if lock prefix present
	int		nRepPrefix = 0;                      // REPxxx prefix or 0

	//
	ulong	u = 0, code = 0;
	int i = 0, j = 0, is3dnow = 0;
	int cxsize = 0;
	int mnemosize = 0;
	int operand = 0;
	int arg = 0;

	//
	t_cmddata* pd, * pdan;

	//
	char name[TEXTLEN], * pname;


	// 32-bit code and data segments only!
	m_ulDataSize = 4;
	m_ulAddrSize = 4;

	// Prepare disassembler variables and initialize structure disasm.
	m_nSegPrefix = SEG_UNDEF;
	m_nHasRM = 0;
	m_nHasSIB = 0;
	m_nDispSize = 0;
	m_nImmSize = 0;
	m_nDump = 0;
	m_nResult = 0;
	m_nSoftError = 0;

	//
	m_pCmd = src;
	m_ulSize = srcsize;
	m_pPFixup = NULL;

	//结构初始化:
	m_pDisasm = disasm;
	m_pDisasm->ip = srcip;
	m_pDisasm->comment[0] = '\0';
	m_pDisasm->cmdtype = C_BAD;
	m_pDisasm->nprefix = 0;
	m_pDisasm->memtype = DEC_UNKNOWN;
	m_pDisasm->indexed = 0;
	m_pDisasm->jmpconst = 0;
	m_pDisasm->jmptable = 0;
	m_pDisasm->adrconst = 0;
	m_pDisasm->immconst = 0;
	m_pDisasm->zeroconst = 0;
	m_pDisasm->fixupoffset = 0;
	m_pDisasm->fixupsize = 0;
	m_pDisasm->warnings = 0;
	m_pDisasm->error = DAE_NOERR;

	// No need to use register contents
	m_nMode = disasmmode;


	// Correct 80x86 command may theoretically contain up to 4 prefixes belonging
	// to different prefix groups. This limits maximal possible size of the
	// command to MAXCMDSIZE=16 bytes. In order to maintain this limit, if
	// Disasm() detects second prefix from the same group, it flushes first
	// prefix in the sequence as a pseudocommand.

	//
	while (m_ulSize > 0)
	{
		nIsPrefix = 1;

		switch (*m_pCmd)
		{
		case 0x26:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_ES;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x2E:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_CS;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x36:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_SS;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x3E:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_DS;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x64:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_FS;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x65:
		{
			if (m_nSegPrefix == SEG_UNDEF)
			{
				m_nSegPrefix = SEG_GS;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x66:
		{
			if (m_ulDataSize == 4)
			{
				m_ulDataSize = 2;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0x67:
		{
			if (m_ulAddrSize == 4)
			{
				m_ulAddrSize = 2;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0xF0:
		{
			if (nLockPrefix == 0)
			{
				nLockPrefix = 0xF0;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0xF2:
		{
			if (nRepPrefix == 0)
			{
				nRepPrefix = 0xF2;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		case 0xF3:
		{
			if (nRepPrefix == 0)
			{
				nRepPrefix = 0xF3;
			}
			else
			{
				nRepeated = 1;
			}
			break;
		}
		default:
		{
			nIsPrefix = 0;
			break;
		}
		}

		//
		if (nRepPrefix == 0 || nRepeated != 0)
		{
			break;
		}

		//
		if (m_nMode >= DISASM_FILE)
		{
			m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X:"), *m_pCmd);
		}

		//
		m_pDisasm->nprefix++;
		m_pCmd++;
		srcip++;
		m_ulSize--;
		u++;
	}

	//
	if (nRepeated) //nRepeated == 1
	{
		//
		if (m_nMode >= DISASM_FILE)
		{
			m_pDisasm->dump[3] = '\0'; //end 00 // Leave only first dumped prefix
			m_pDisasm->nprefix = 1;

			switch (m_pCmd[-(long)u])
			{
			case 0x26:
			{
				pname = (char*)(g_szSegName[SEG_ES]);
				break;
			}
			case 0x2E:
			{
				pname = (char*)(g_szSegName[SEG_CS]);
				break;
			}
			case 0x36:
			{
				pname = (char*)(g_szSegName[SEG_SS]);
				break;
			}
			case 0x3E:
			{
				pname = (char*)(g_szSegName[SEG_DS]);
				break;
			}
			case 0x64:
			{
				pname = (char*)(g_szSegName[SEG_FS]);
				break;
			}
			case 0x65:
			{
				pname = (char*)(g_szSegName[SEG_GS]);
				break;
			}
			case 0x66:
			{
				pname = ("DATASIZE");
				break;
			}
			case 0x67:
			{
				pname = ("ADDRSIZE");
				break;
			}
			case 0xF0:
			{
				pname = ("LOCK");
				break;
			}
			case 0xF2:
			{
				pname = ("REPNE");
				break;
			}
			case 0xF3:
			{
				pname = ("REPE");
				break;
			}
			default:
			{
				pname = "?";
				break;
			}
			}
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("PREFIX %s:"), pname);

			if (m_nLowercase)
			{
				strlwr(m_pDisasm->result);
			}
			if (m_nExtraPrefix == 0) strcpy(m_pDisasm->comment, ("Superfluous prefix"));
		}
		m_pDisasm->warnings |= DAW_PREFIX;
		if (nLockPrefix)
		{
			m_pDisasm->warnings |= DAW_LOCK;
		}
		m_pDisasm->cmdtype = C_RARE;
		return 1;
	}


	// If lock prefix available, display it and forget, because it has no
	// influence on decoding of rest of the command.
	if (nLockPrefix != 0)
	{
		if (m_nMode >= DISASM_FILE)
		{
			m_nResult += sprintf(m_pDisasm->result + m_nResult, ("LOCK "));
		}
		m_pDisasm->warnings |= DAW_LOCK;
	}

	// Fetch (if available) first 3 bytes of the command, add repeat prefix and
	// find command in the command table.
	code = 0;
	if (m_ulSize > 0)
	{
		*(((char*)&code) + 0) = m_pCmd[0];
	}
	if (m_ulSize > 1)
	{
		*(((char*)&code) + 1) = m_pCmd[1];
	}
	if (m_ulSize > 2)
	{
		*(((char*)&code) + 2) = m_pCmd[2];
	}

	if (nRepPrefix != 0)                  // RER/REPE/REPNE is considered to be
	{
		code = (code << 8) | nRepPrefix;        // part of command.
	}

	if (m_nDecodeVxd && (code & 0xFFFF) == 0x20CD)
	{
		pd = &g_VxdCmd;                        // Decode VxD call (Win95/98)
	}
	else
	{
		for (pd = g_CmdData; pd->mask != 0; pd++)
		{
			if (((code ^ pd->code) & pd->mask) != 0)
			{
				continue;
			}
			if (m_nMode >= DISASM_FILE && m_nShortStringCmds &&
				(pd->arg1 == MSO || pd->arg1 == MDE || pd->arg2 == MSO || pd->arg2 == MDE))
			{
				continue;                      // Search short form of string command
			}
			break;
		}
	}

	//
	if ((pd->type & C_TYPEMASK) == C_NOW)
	{
		// 3DNow! commands require additional search.
		is3dnow = 1;
		j = Get3dnowsuffix();
		if (j < 0)
		{
			m_pDisasm->error = DAE_CROSS;
		}
		else
		{
			for (; pd->mask != 0; pd++)
			{
				if (((code ^ pd->code) & pd->mask) != 0)
				{
					continue;
				}
				if (((uchar*)&(pd->code))[2] == j)
				{
					break;
				}
			}
		}
	}

	// Command not found
	if (pd->mask == 0)
	{
		m_pDisasm->cmdtype = C_BAD;
		if (m_ulSize < 2)
		{
			m_pDisasm->error = DAE_CROSS;
		}
		else
		{
			m_pDisasm->error = DAE_BADCMD;
		}

	}
	else
	{
		m_pDisasm->cmdtype = pd->type;
		cxsize = m_ulDataSize;

		//
		if (m_nSegPrefix == SEG_FS || m_nSegPrefix == SEG_GS || nLockPrefix != 0)
		{
			m_pDisasm->cmdtype |= C_RARE;             // These prefixes are rare
		}

		//
		if (pd->bits == PR)
		{
			m_pDisasm->warnings |= DAW_PRIV;      // Privileged command (ring 0)
		}
		else if (pd->bits == WP)
		{
			m_pDisasm->warnings |= DAW_IO;        // I/O command
		}

		// Win32 programs usually try to keep stack dword-aligned, so INC ESP
		// (44) and DEC ESP (4C) usually don't appear in real code. Also check for
		// ADD ESP,imm and SUB ESP,imm (81,C4,imm32; 83,C4,imm8; 81,EC,imm32;
		// 83,EC,imm8).

		if (m_pCmd[0] == 0x44 || m_pCmd[0] == 0x4C ||
			(m_ulSize >= 3 && (m_pCmd[0] == 0x81 || m_pCmd[0] == 0x83) &&
				(m_pCmd[1] == 0xC4 || m_pCmd[1] == 0xEC) && (m_pCmd[2] & 0x03) != 0)
			)
		{
			m_pDisasm->warnings |= DAW_STACK;
			m_pDisasm->cmdtype |= C_RARE;
		};

		// Warn also on MOV SEG,... (8E...). Win32 works in flat mode.
		if (m_pCmd[0] == 0x8E)
		{
			m_pDisasm->warnings |= DAW_SEGMENT;
		}

		// If opcode is 2-byte, adjust command.
		if (pd->len == 2)
		{
			if (m_ulSize == 0)
			{
				m_pDisasm->error = DAE_CROSS;
			}
			else
			{
				if (m_nMode >= DISASM_FILE)
				{
					m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd);
				}
				m_pCmd[0]++;
				srcip++;
				m_ulSize--;
			}
		}
		if (m_ulSize == 0)
		{
			m_pDisasm->error = DAE_CROSS;
		}

		// Some commands either feature non-standard data size or have bit which
		// allowes to select data size.
		if ((pd->bits & WW) != 0 && (*m_pCmd & WW) == 0)
		{
			m_ulDataSize = 1;            // Bit W in command set to 0
		}
		else if ((pd->bits & W3) != 0 && (*m_pCmd & W3) == 0)
		{
			m_ulDataSize = 1;            // Another position of bit W
		}
		else if ((pd->bits & FF) != 0)
		{
			m_ulDataSize = 2;
		}

		//
		// Some commands either have mnemonics which depend on data size (8/16 bits
		// or 32 bits, like CWD/CDQ), or have several different mnemonics (like
		// JNZ/JNE). First case is marked by either '&' (mnemonic depends on
		// operand size) or '$' (depends on address size). In the second case,
		// there is no special marker and disassembler selects main mnemonic.
		if (m_nMode >= DISASM_FILE)
		{
			//
			if (pd->name[0] == '&')
			{
				mnemosize = m_ulDataSize;
			}
			else if (pd->name[0] == '$')
			{
				mnemosize = m_ulDataSize;
			}
			else
			{
				mnemosize = 0;
			}

			//
			if (mnemosize != 0)
			{
				for (i = 0, j = 1; pd->name[j] != '\0'; j++)
				{
					if (pd->name[j] == ':')      // Separator between 16/32 mnemonics
					{
						if (mnemosize == 4)
						{
							i = 0;
						}
						else
						{
							break;
						}

					}
					else if (pd->name[j] == '*')  // Substitute by 'W', 'D' or none
					{
						if (mnemosize == 4 && m_nSizeSens != 2)
						{
							name[i++] = 'D';
						}
						else if (mnemosize != 4 && m_nSizeSens != 0)
						{
							name[i++] = 'W';
						}

					}
					else
					{
						name[i++] = pd->name[j];
					}
				}
				name[i] = '\0';
			}
			else
			{
				strcpy(name, pd->name);
				for (i = 0; name[i] != '\0'; i++)
				{
					// Use main mnemonic
					if (name[i] == ',')
					{
						name[i] = '\0';
						break;
					}
				}
			}

			//
			if (nRepPrefix != 0 && m_nTabArguments)
			{
				for (i = 0; name[i] != '\0' && name[i] != ' '; i++)
				{
					m_pDisasm->result[m_nResult++] = name[i];
				}

				if (name[i] == ' ')
				{
					m_pDisasm->result[m_nResult++] = ' ';
					i++;
				}

				while (m_nResult < 8)
				{
					m_pDisasm->result[m_nResult++] = ' ';
				}

				for (; name[i] != '\0'; i++)
				{
					m_pDisasm->result[m_nResult++] = name[i];
				}

			}
			else
			{
				m_nResult += sprintf(m_pDisasm->result + m_nResult, ("%s"), name);
			}

			if (m_nLowercase)
			{
				strlwr(m_pDisasm->result);
			}
		}

		//
		// Decode operands (explicit - encoded in command, implicit - present in
		// mmemonic or assumed - used or modified by command). Assumed operands
		// must stay after all explicit and implicit operands. Up to 3 operands
		// are allowed.
		for (operand = 0; operand < 3; operand++)
		{
			if (m_pDisasm->error)
			{
				break;    // Error - no sense to continue
			}

			// If command contains both source and destination, one usually must not
			// decode destination to comment because it will be overwritten on the
			// next step. Global addcomment takes care of this. Decoding routines,
			// however, may ignore this flag.
			if (operand == 0 && pd->arg2 != NNN && pd->arg2 < PSEUDOOP)
			{
				m_nAddComment = 0;
			}
			else
			{
				m_nAddComment = 1;
			}

			// Get type of next argument.
			if (operand == 0)
			{
				arg = pd->arg1;
			}
			else if (operand == 1)
			{
				arg = pd->arg2;
			}
			else
			{
				arg = pd->arg3;
			}

			//
			if (arg == NNN)
			{
				break;    // No more operands
			}

			// Arguments with arg>=PSEUDOOP are assumed operands and are not
			// displayed in disassembled result, so they require no delimiter.
			if ((m_nMode >= DISASM_FILE) && arg < PSEUDOOP)
			{
				if (operand == 0)
				{
					m_pDisasm->result[m_nResult++] = ' ';
					if (m_nTabArguments)
					{
						while (m_nResult < 8)
						{
							m_pDisasm->result[m_nResult++] = ' ';
						}
					}
				}
				else
				{
					m_pDisasm->result[m_nResult++] = ',';
					if (m_nExtraSpace)
					{
						m_pDisasm->result[m_nResult++] = ' ';
					}
				}
			}

			//
			// Decode, analyse and comment next operand of the command.
			switch (arg)
			{
			case REG:                      // Integer register in Reg field
			{
				if (m_ulSize < 2)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					DecodeRG(m_pCmd[1] >> 3, m_ulDataSize, REG);
				}
				m_nHasRM = 1;
				break;
			}
			case RCM:                      // Integer register in command byte
			{
				DecodeRG(m_pCmd[0], m_ulDataSize, RCM);
				break;
			}
			case RG4:                      // Integer 4-byte register in Reg field
			{
				if (m_ulSize < 2)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					DecodeRG(m_pCmd[1] >> 3, 4, RG4);
				}
				m_nHasRM = 1;
				break;
			}
			case RAC:                      // Accumulator (AL/AX/EAX, implicit)
			{
				DecodeRG(REG_EAX, m_ulDataSize, RAC);
				break;
			}
			case RAX:                      // AX (2-byte, implicit)
			{
				DecodeRG(REG_EAX, 2, RAX);
				break;
			}
			case RDX:                      // DX (16-bit implicit port address)
			{
				DecodeRG(REG_EDX, 2, RDX);
				break;
			}
			case RCL:                      // Implicit CL register (for shifts)
			{
				DecodeRG(REG_ECX, 1, RCL);
				break;
			}
			case RS0:                      // Top of FPU stack (ST(0))
			{
				DecodeST(0, 0);
				break;
			}
			case RST:                      // FPU register (ST(i)) in command byte
			{
				DecodeST(m_pCmd[0], 0);
				break;
			}
			case RMX:                      // MMX register MMx
			{
				if (m_ulSize < 2)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					DecodeMX(m_pCmd[1] >> 3);
				}
				m_nHasRM = 1;
				break;
			}
			case R3D:                      // 3DNow! register MMx
			{
				if (m_ulSize < 2)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				else
				{
					DecodeNR(m_pCmd[1] >> 3);
				}
				m_nHasRM = 1;
				break;
			}
			case MRG:                      // Memory/register in ModRM byte
			case MRJ:                      // Memory/reg in ModRM as JUMP target
			case MR1:                      // 1-byte memory/register in ModRM byte
			case MR2:                      // 2-byte memory/register in ModRM byte
			case MR4:                      // 4-byte memory/register in ModRM byte
			case MR8:                      // 8-byte memory/MMX register in ModRM
			case MRD:                      // 8-byte memory/3DNow! register in ModRM
			case MMA:                      // Memory address in ModRM byte for LEA
			case MML:                      // Memory in ModRM byte (for LES)
			case MM6:                      // Memory in ModRm (6-byte descriptor)
			case MMB:                      // Two adjacent memory locations (BOUND)
			case MD2:                      // Memory in ModRM byte (16-bit integer)
			case MB2:                      // Memory in ModRM byte (16-bit binary)
			case MD4:                      // Memory in ModRM byte (32-bit integer)
			case MD8:                      // Memory in ModRM byte (64-bit integer)
			case MDA:                      // Memory in ModRM byte (80-bit BCD)
			case MF4:                      // Memory in ModRM byte (32-bit float)
			case MF8:                      // Memory in ModRM byte (64-bit float)
			case MFA:                      // Memory in ModRM byte (80-bit float)
			case MFE:                      // Memory in ModRM byte (FPU environment)
			case MFS:                      // Memory in ModRM byte (FPU state)
			case MFX:                      // Memory in ModRM byte (ext. FPU state)
			{
				DecodeMR(arg);
				break;
			}
			case MMS:                      // Memory in ModRM byte (as SEG:OFFS)
			{
				DecodeMR(arg);
				m_pDisasm->warnings |= DAW_FARADDR;
				break;
			}
			case RR4:                      // 4-byte memory/register (register only)
			case RR8:                      // 8-byte MMX register only in ModRM
			case RRD:                      // 8-byte memory/3DNow! (register only)
			{
				if ((m_pCmd[1] & 0xC0) != 0xC0)
				{
					m_nSoftError = DAE_REGISTER;
				}
				DecodeMR(arg);
				break;
			}
			case MSO:                      // Source in string op's ([ESI])
			{
				DecodeSO();
				break;
			}
			case MDE:                      // Destination in string op's ([EDI])
			{
				DecodeDE();
				break;
			}
			case MXL:                      // XLAT operand ([EBX+AL])
			{
				DecodeXL();
				break;
			}
			case IMM:                      // Immediate data (8 or 16/32)
			case IMU:                      // Immediate unsigned data (8 or 16/32)
			{
				if ((pd->bits & SS) != 0 && (*m_pCmd & 0x02) != 0)
				{
					DecodeIM(1, m_ulDataSize, arg);
				}
				else
				{
					DecodeIM(m_ulDataSize, 0, arg);
				}
				break;
			}
			case VXD:                      // VxD service (32-bit only)
			{
				DecodeVX();
				break;
			}
			case IMX:                      // Immediate sign-extendable byte
			{
				DecodeIM(1, m_ulDataSize, arg);
				break;
			}
			case C01:                      // Implicit constant 1 (for shifts)
			{
				DecodeC1();
				break;
			}
			case IMS:                      // Immediate byte (for shifts)
			case IM1:                      // Immediate byte
			{
				DecodeIM(1, 0, arg);
				break;
			}
			case IM2:                      // Immediate word (ENTER/RET)
			{
				DecodeIM(2, 0, arg);
				if ((m_pDisasm->immconst & 0x03) != 0)
				{
					m_pDisasm->warnings |= DAW_STACK;
				}
				break;
			}
			case IMA:                      // Immediate absolute near data address
			{
				DecodeIA();
				break;
			}
			case JOB:                      // Immediate byte offset (for jumps)
			{
				DecodeRJ(1, srcip + 2);
				break;
			}
			case JOW:                      // Immediate full offset (for jumps)
			{
				DecodeRJ(m_ulDataSize, srcip + m_ulDataSize + 1);
				break;
			}
			case JMF:                      // Immediate absolute far jump/call addr
			{
				DecodeJF();
				m_pDisasm->warnings |= DAW_FARADDR;
				break;
			}
			case SGM:                      // Segment register in ModRM byte
			{
				if (m_ulSize < 2)
				{
					m_pDisasm->error = DAE_CROSS;
				}
				DecodeSG(m_pCmd[1] >> 3);
				m_nHasRM = 1;
				break;
			}
			case SCM:                      // Segment register in command byte
			{
				DecodeSG(m_pCmd[0] >> 3);
				if ((m_pDisasm->cmdtype & C_TYPEMASK) == C_POP)
				{
					m_pDisasm->warnings |= DAW_SEGMENT;
				}
				break;
			}
			case CRX:                      // Control register CRx
			{
				if ((m_pCmd[1] & 0xC0) != 0xC0)
				{
					m_pDisasm->error = DAE_REGISTER;
				}
				DecodeCR(m_pCmd[1]);
				break;
			}
			case DRX:                      // Debug register DRx
			{
				if ((m_pCmd[1] & 0xC0) != 0xC0)
				{
					m_pDisasm->error = DAE_REGISTER;
				}
				DecodeDR(m_pCmd[1]);
				break;
			}
			case PRN:                      // Near return address (pseudooperand)
			{
				break;
			}
			case PRF:                      // Far return address (pseudooperand)
			{
				m_pDisasm->warnings |= DAW_FARADDR;
				break;
			}
			case PAC:                      // Accumulator (AL/AX/EAX, pseudooperand)
			{
				DecodeRG(REG_EAX, m_ulDataSize, PAC);
				break;
			}
			case PAH:                      // AH (in LAHF/SAHF, pseudooperand)
			case PFL:                      // Lower byte of flags (pseudooperand)
			{
				break;
			}
			case PS0:                      // Top of FPU stack (pseudooperand)
			{
				DecodeST(0, 1);
				break;
			}
			case PS1:                      // ST(1) (pseudooperand)
			{
				DecodeST(1, 1);
				break;
			}
			case PCX:                      // CX/ECX (pseudooperand)
			{
				DecodeRG(REG_ECX, cxsize, PCX);
				break;
			}
			case PDI:                      // EDI (pseudooperand in MMX extentions)
			{
				DecodeRG(REG_EDI, 4, PDI);
				break;
			}
			default:
			{
				m_pDisasm->error = DAE_INTERN;      // Unknown argument type
				break;
			}
			}
		}

		// Check whether command may possibly contain fixups.
		if (m_pPFixup != NULL && m_pDisasm->fixupsize > 0)
		{
			m_pDisasm->fixupoffset = m_pPFixup - src;
		}

		// Segment prefix and address size prefix are superfluous for command which
		// does not access memory. If this the case, mark command as rare to help
		// in analysis.
		if (m_pDisasm->memtype == DEC_UNKNOWN && (m_nSegPrefix != SEG_UNDEF || (m_ulAddrSize != 4 && pd->name[0] != '$')))
		{
			m_pDisasm->warnings |= DAW_PREFIX;
			m_pDisasm->cmdtype |= C_RARE;
		}

		// 16-bit addressing is rare in 32-bit programs. If this is the case,
		// mark command as rare to help in analysis.
		if (m_ulAddrSize != 4)
		{
			m_pDisasm->cmdtype |= C_RARE;
		}
	}

	//
	// Suffix of 3DNow! command is accounted best by assuming it immediate byte
	// constant.
	if (is3dnow)
	{
		if (m_nImmSize != 0)
		{
			m_pDisasm->error = DAE_BADCMD;
		}
		else m_nImmSize = 1;
	}

	// Right or wrong, command decoded. Now dump it.
	if (m_pDisasm->error != 0)
	{
		// Hard error in command detected
		if (m_nMode >= DISASM_FILE)
		{
			m_nResult = sprintf(m_pDisasm->result, ("???"));
		}
		if (m_pDisasm->error == DAE_BADCMD && (*m_pCmd == 0x0F || *m_pCmd == 0xFF) && m_ulSize > 0)
		{
			if (m_nMode >= DISASM_FILE)
			{
				m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd);
			}
			m_pCmd++;
			m_ulSize--;
		}
		if (m_ulSize > 0)
		{
			if (m_nMode >= DISASM_FILE)
			{
				m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd);
			}
			m_pCmd++;
			m_ulSize--;
		}
	}
	else                                  // No hard error, dump command
	{
		if (m_nMode >= DISASM_FILE)
		{
			m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd++);
			if (m_nHasRM)
			{
				m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd++);
			}
			if (m_nHasSIB)
			{
				m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd++);
			}
			if (m_nDispSize != 0)
			{
				m_pDisasm->dump[m_nDump++] = ' ';
				for (i = 0; i < m_nDispSize; i++)
				{
					m_nDump += sprintf(m_pDisasm->dump + m_nDump, ("%02X"), *m_pCmd++);
				}
			}
			if (m_nImmSize != 0)
			{
				m_pDisasm->dump[m_nDump++] = ' ';
				for (i = 0; i < m_nImmSize; i++)
				{
					m_nDump += sprintf(m_pDisasm->dump + m_nDump, "%02X", *m_pCmd++);
				}
			}
		}
		else
		{
			m_pCmd += 1 + m_nHasRM + m_nHasSIB + m_nDispSize + m_nImmSize;
		}

		//
		m_ulSize -= 1 + m_nHasRM + m_nHasSIB + m_nDispSize + m_nImmSize;
	}

	// Check that command is not a dangerous one.
	if (m_nMode >= DISASM_DATA)
	{
		for (pdan = g_Dangerous; pdan->mask != 0; pdan++)
		{
			if (((code ^ pdan->code) & pdan->mask) != 0)
			{
				continue;
			}
			if (pdan->type == C_DANGERLOCK && nLockPrefix == 0)
			{
				break;    // Command harmless without LOCK prefix
			}
			if (m_nIsWindowsNT && pdan->type == C_DANGER95)
			{
				break;    // Command harmless under Windows NT
			}

			// Dangerous command!
			if (pdan->type == C_DANGER95)
			{
				m_pDisasm->warnings |= DAW_DANGER95;
			}
			else
			{
				m_pDisasm->warnings |= DAW_DANGEROUS;
			}
			break;
		}
	}
	if (m_pDisasm->error == 0 && m_nSoftError != 0)
	{
		m_pDisasm->error = m_nSoftError;    // Error, but still display command
	}

	//
	if (m_nMode >= DISASM_FILE)
	{
		if (m_pDisasm->error != DAE_NOERR)
		{
			switch (m_pDisasm->error)
			{
			case DAE_CROSS:
			{
				strcpy(m_pDisasm->comment, ("Command crosses end of memory block"));
				break;
			}
			case DAE_BADCMD:
			{
				strcpy(m_pDisasm->comment, ("Unknown command"));
				break;
			}
			case DAE_BADSEG:
			{
				strcpy(m_pDisasm->comment, ("Undefined segment register"));
				break;
			}
			case DAE_MEMORY:
			{
				strcpy(m_pDisasm->comment, ("Illegal use of register"));
				break;
			}
			case DAE_REGISTER:
			{
				strcpy(m_pDisasm->comment, ("Memory address not allowed"));
				break;
			}
			case DAE_INTERN:
			{
				strcpy(m_pDisasm->comment, ("Internal OLLYDBG error"));
				break;
			}
			default:
			{
				strcpy(m_pDisasm->comment, ("Unknown error"));
				break;
			}
			}
		}
		else if ((m_pDisasm->warnings & DAW_PRIV) != 0 && m_nPrivileged == 0)
		{
			strcpy(m_pDisasm->comment, ("Privileged command"));
		}
		else if ((m_pDisasm->warnings & DAW_IO) != 0 && m_nIOCommand == 0)
		{
			strcpy(m_pDisasm->comment, ("I/O command"));
		}
		else if ((m_pDisasm->warnings & DAW_FARADDR) != 0 && m_nFarCalls == 0)
		{
			if ((m_pDisasm->cmdtype & C_TYPEMASK) == C_JMP)
			{
				strcpy(m_pDisasm->comment, ("Far jump"));
			}
			else if ((m_pDisasm->cmdtype & C_TYPEMASK) == C_CAL)
			{
				strcpy(m_pDisasm->comment, ("Far call"));
			}
			else if ((m_pDisasm->cmdtype & C_TYPEMASK) == C_RET)
			{
				strcpy(m_pDisasm->comment, ("Far return"));
			}
		}
		else if ((m_pDisasm->warnings & DAW_SEGMENT) != 0 && m_nFarCalls == 0)
		{
			strcpy(m_pDisasm->comment, ("Modification of segment register"));
		}
		else if ((m_pDisasm->warnings & DAW_SHIFT) != 0 && m_nBadShift == 0)
		{
			strcpy(m_pDisasm->comment, ("Shift constant out of range 1..31"));
		}
		else if ((m_pDisasm->warnings & DAW_PREFIX) != 0 && m_nExtraPrefix == 0)
		{
			strcpy(m_pDisasm->comment, ("Superfluous prefix"));
		}
		else if ((m_pDisasm->warnings & DAW_LOCK) != 0 && m_nLockedbus == 0)
		{
			strcpy(m_pDisasm->comment, ("LOCK prefix"));
		}
		else if ((m_pDisasm->warnings & DAW_STACK) != 0 && m_nStackAlign == 0)
		{
			strcpy(m_pDisasm->comment, ("Unaligned stack operation"));
		}
	}
	return (srcsize - m_ulSize);             // Returns number of recognized bytes
}