public VMFlags ToFlags(byte value)
{
VMFlags result = 0;
foreach (var entry in Flags)
{
if ((value & entry.Key) != 0)
{
result |= entry.Value;
}
}
return(result);
}
public byte GetFlagMask(VMFlags flags)
{
byte result = 0;
foreach (var entry in Flags)
{
if (flags.HasFlag(entry.Value))
{
result |= entry.Key;
}
}
return(result);
}
public static bool HasFlagFast(this VMFlags value, VMFlags flag) => (value & flag) != 0;
private bool ExecuteCode(List<VMPreparedCommand> preparedCode,
int cmdCount)
{
maxOpCount = 25000000;
this.codeSize = cmdCount;
this.IP = 0;
while (true)
{
VMPreparedCommand cmd = preparedCode[IP];
int op1 = GetOperand(cmd.Op1);
int op2 = GetOperand(cmd.Op2);
switch (cmd.OpCode)
{
case VMCommands.VM_MOV:
SetValue(cmd.IsByteMode, Mem, op1, GetValue(cmd.IsByteMode, Mem, op2)); // SET_VALUE(Cmd->ByteMode,Op1,GET_VALUE(Cmd->ByteMode,Op2));
break;
case VMCommands.VM_MOVB:
SetValue(true, Mem, op1, GetValue(true, Mem, op2));
break;
case VMCommands.VM_MOVD:
SetValue(false, Mem, op1, GetValue(false, Mem, op2));
break;
case VMCommands.VM_CMP:
{
VMFlags value1 = (VMFlags)GetValue(cmd.IsByteMode, Mem, op1);
VMFlags result = value1 - GetValue(cmd.IsByteMode, Mem, op2);
if (result == 0)
{
flags = VMFlags.VM_FZ;
}
else
{
flags = (VMFlags)((result > value1) ? 1 : 0 | (int)(result & VMFlags.VM_FS));
}
}
break;
case VMCommands.VM_CMPB:
{
VMFlags value1 = (VMFlags)GetValue(true, Mem, op1);
VMFlags result = value1 - GetValue(true, Mem, op2);
if (result == 0)
{
flags = VMFlags.VM_FZ;
}
else
{
flags = (VMFlags)((result > value1) ? 1 : 0 | (int)(result & VMFlags.VM_FS));
}
}
break;
case VMCommands.VM_CMPD:
{
VMFlags value1 = (VMFlags)GetValue(false, Mem, op1);
VMFlags result = value1 - GetValue(false, Mem, op2);
if (result == 0)
{
flags = VMFlags.VM_FZ;
}
else
{
flags = (VMFlags)((result > value1) ? 1 : 0 | (int)(result & VMFlags.VM_FS));
}
}
break;
case VMCommands.VM_ADD:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int result = (int)((((long)value1 + (long)GetValue(cmd.IsByteMode, Mem, op2))) & unchecked((int)0xffffffff));
if (cmd.IsByteMode)
{
result &= 0xff;
flags = (VMFlags)((result < value1) ? 1 : 0 | (result == 0 ? (int)VMFlags.VM_FZ : (((result & 0x80) != 0) ? (int)VMFlags.VM_FS : 0)));
// Flags=(Result<Value1)|(Result==0 ? VM_FZ:((Result&0x80) ?
// VM_FS:0));
}
else
flags = (VMFlags)((result < value1) ? 1 : 0 | (result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_ADDB:
SetValue(true, Mem, op1, (int)((long)GetValue(true, Mem, op1) & 0xFFffFFff + (long)GetValue(true, Mem, op2) & unchecked((int)0xFFffFFff)));
break;
case VMCommands.VM_ADDD:
SetValue(false, Mem, op1, (int)((long)GetValue(false, Mem, op1) & 0xFFffFFff + (long)GetValue(false, Mem, op2) & unchecked((int)0xFFffFFff)));
break;
case VMCommands.VM_SUB:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int result = (int)((long)value1 & 0xffFFffFF - (long)GetValue(cmd.IsByteMode, Mem, op2) & unchecked((int)0xFFffFFff));
flags = (VMFlags)((result == 0) ? (int)VMFlags.VM_FZ : ((result > value1) ? 1 : 0 | (result & (int)VMFlags.VM_FS)));
SetValue(cmd.IsByteMode, Mem, op1, result); // (Cmd->ByteMode,Op1,Result);
}
break;
case VMCommands.VM_SUBB:
SetValue(true, Mem, op1, (int)((long)GetValue(true, Mem, op1) & 0xFFffFFff - (long)GetValue(true, Mem, op2) & unchecked((int)0xFFffFFff)));
break;
case VMCommands.VM_SUBD:
SetValue(false, Mem, op1, (int)((long)GetValue(false, Mem, op1) & 0xFFffFFff - (long)GetValue(false, Mem, op2) & unchecked((int)0xFFffFFff)));
break;
case VMCommands.VM_JZ:
if ((flags & VMFlags.VM_FZ) != 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JNZ:
if ((flags & VMFlags.VM_FZ) == 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_INC:
{
int result = (int)((long)GetValue(cmd.IsByteMode, Mem, op1) & 0xFFffFFffL + 1L);
if (cmd.IsByteMode)
{
result &= 0xff;
}
SetValue(cmd.IsByteMode, Mem, op1, result);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
}
break;
case VMCommands.VM_INCB:
SetValue(true, Mem, op1, (int)((long)GetValue(true, Mem, op1) & 0xFFffFFffL + 1L));
break;
case VMCommands.VM_INCD:
SetValue(false, Mem, op1, (int)((long)GetValue(false, Mem, op1) & 0xFFffFFffL + 1L));
break;
case VMCommands.VM_DEC:
{
int result = (int)((long)GetValue(cmd.IsByteMode, Mem, op1) & 0xFFffFFff - 1);
SetValue(cmd.IsByteMode, Mem, op1, result);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
}
break;
case VMCommands.VM_DECB:
SetValue(true, Mem, op1, (int)((long)GetValue(true, Mem, op1) & 0xFFffFFff - 1));
break;
case VMCommands.VM_DECD:
SetValue(false, Mem, op1, (int)((long)GetValue(false, Mem, op1) & 0xFFffFFff - 1));
break;
case VMCommands.VM_JMP:
setIP(GetValue(false, Mem, op1));
continue;
case VMCommands.VM_XOR:
{
int result = GetValue(cmd.IsByteMode, Mem, op1) ^ GetValue(cmd.IsByteMode, Mem, op2);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_AND:
{
int result = GetValue(cmd.IsByteMode, Mem, op1) & GetValue(cmd.IsByteMode, Mem, op2);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_OR:
{
int result = GetValue(cmd.IsByteMode, Mem, op1) | GetValue(cmd.IsByteMode, Mem, op2);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_TEST:
{
int result = GetValue(cmd.IsByteMode, Mem, op1) & GetValue(cmd.IsByteMode, Mem, op2);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : result & (int)VMFlags.VM_FS);
}
break;
case VMCommands.VM_JS:
if ((flags & VMFlags.VM_FS) != 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JNS:
if ((flags & VMFlags.VM_FS) == 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JB:
if ((flags & VMFlags.VM_FC) != 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JBE:
if ((flags & (VMFlags.VM_FC | VMFlags.VM_FZ)) != 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JA:
if ((flags & (VMFlags.VM_FC | VMFlags.VM_FZ)) == 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_JAE:
if ((flags & VMFlags.VM_FC) == 0)
{
setIP(GetValue(false, Mem, op1));
continue;
}
break;
case VMCommands.VM_PUSH:
R[7] -= 4;
SetValue(false, Mem, R[7] & VM_MEMMASK, GetValue(false, Mem, op1));
break;
case VMCommands.VM_POP:
SetValue(false, Mem, op1, GetValue(false, Mem, R[7] & VM_MEMMASK));
R[7] += 4;
break;
case VMCommands.VM_CALL:
R[7] -= 4;
SetValue(false, Mem, R[7] & VM_MEMMASK, IP + 1);
setIP(GetValue(false, Mem, op1));
continue;
case VMCommands.VM_NOT:
SetValue(cmd.IsByteMode, Mem, op1, ~GetValue(cmd.IsByteMode, Mem, op1));
break;
case VMCommands.VM_SHL:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int value2 = GetValue(cmd.IsByteMode, Mem, op2);
int result = value1 << value2;
flags = (VMFlags)((result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)) | (((value1 << (value2 - 1)) & unchecked((int)0x80000000)) != 0 ? (int)VMFlags.VM_FC : 0));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_SHR:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int value2 = GetValue(cmd.IsByteMode, Mem, op2);
int result = Utilities.URShift(value1, value2);
flags = (VMFlags)((result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)) | ((Utilities.URShift(value1, (value2 - 1))) & (int)VMFlags.VM_FC));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_SAR:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int value2 = GetValue(cmd.IsByteMode, Mem, op2);
int result = ((int)value1) >> value2;
flags = (VMFlags)((result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)) | ((value1 >> (value2 - 1)) & (int)VMFlags.VM_FC));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_NEG:
{
int result = -GetValue(cmd.IsByteMode, Mem, op1);
flags = (VMFlags)(result == 0 ? (int)VMFlags.VM_FZ : (int)VMFlags.VM_FC | (result & (int)VMFlags.VM_FS));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_NEGB:
SetValue(true, Mem, op1, -GetValue(true, Mem, op1));
break;
case VMCommands.VM_NEGD:
SetValue(false, Mem, op1, -GetValue(false, Mem, op1));
break;
case VMCommands.VM_PUSHA:
{
for (int i = 0, SP = R[7] - 4; i < regCount; i++, SP -= 4)
{
SetValue(false, Mem, SP & VM_MEMMASK, R[i]);
}
R[7] -= regCount * 4;
}
break;
case VMCommands.VM_POPA:
{
for (int i = 0, SP = R[7]; i < regCount; i++, SP += 4)
R[7 - i] = GetValue(false, Mem, SP & VM_MEMMASK);
}
break;
case VMCommands.VM_PUSHF:
R[7] -= 4;
SetValue(false, Mem, R[7] & VM_MEMMASK, (int)flags);
break;
case VMCommands.VM_POPF:
flags = (VMFlags)GetValue(false, Mem, R[7] & VM_MEMMASK);
R[7] += 4;
break;
case VMCommands.VM_MOVZX:
SetValue(false, Mem, op1, GetValue(true, Mem, op2));
break;
case VMCommands.VM_MOVSX:
SetValue(false, Mem, op1, (byte)GetValue(true, Mem, op2));
break;
case VMCommands.VM_XCHG:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
SetValue(cmd.IsByteMode, Mem, op1, GetValue(cmd.IsByteMode, Mem, op2));
SetValue(cmd.IsByteMode, Mem, op2, value1);
}
break;
case VMCommands.VM_MUL:
{
int result = (int)(((long)GetValue(cmd.IsByteMode, Mem, op1) & 0xFFffFFff * (long)GetValue(cmd.IsByteMode, Mem, op2) & unchecked((int)0xFFffFFff)) & unchecked((int)0xFFffFFff));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_DIV:
{
int divider = GetValue(cmd.IsByteMode, Mem, op2);
if (divider != 0)
{
int result = GetValue(cmd.IsByteMode, Mem, op1) / divider;
SetValue(cmd.IsByteMode, Mem, op1, result);
}
}
break;
case VMCommands.VM_ADC:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int FC = (int)(flags & VMFlags.VM_FC);
int result = (int)((long)value1 & 0xFFffFFff + (long)GetValue(cmd.IsByteMode, Mem, op2) & 0xFFffFFff + (long)FC & unchecked((int)0xFFffFFff));
if (cmd.IsByteMode)
{
result &= 0xff;
}
flags = (VMFlags)((result < value1 || result == value1 && FC != 0) ? 1 : 0 | (result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_SBB:
{
int value1 = GetValue(cmd.IsByteMode, Mem, op1);
int FC = (int)(flags & VMFlags.VM_FC);
int result = (int)((long)value1 & 0xFFffFFff - (long)GetValue(cmd.IsByteMode, Mem, op2) & 0xFFffFFff - (long)FC & unchecked((int)0xFFffFFff));
if (cmd.IsByteMode)
{
result &= 0xff;
}
flags = (VMFlags)((result > value1 || result == value1 && FC != 0) ? 1 : 0 | (result == 0 ? (int)VMFlags.VM_FZ : (result & (int)VMFlags.VM_FS)));
SetValue(cmd.IsByteMode, Mem, op1, result);
}
break;
case VMCommands.VM_RET:
if (R[7] >= VM_MEMSIZE)
{
return (true);
}
setIP(GetValue(false, Mem, R[7] & VM_MEMMASK));
R[7] += 4;
continue;
case VMCommands.VM_STANDARD:
ExecuteStandardFilter((VMStandardFilters)(cmd.Op1.Data));
break;
case VMCommands.VM_PRINT:
break;
}
IP++;
--maxOpCount;
}
}
public void execute(VMPreparedProgram prg)
{
for (int i = 0; i < prg.InitR.Length; i++)
// memcpy(R,Prg->InitR,sizeof(Prg->InitR));
{
R[i] = prg.InitR[i];
}
long globalSize = Math.Min(prg.GlobalData.Count, VM_GLOBALMEMSIZE) & unchecked((int)0xffFFffFF);
if (globalSize != 0)
{
for (int i = 0; i < globalSize; i++)
// memcpy(Mem+VM_GLOBALMEMADDR,&Prg->GlobalData[0],GlobalSize);
{
Mem[VM_GLOBALMEMADDR + i] = prg.GlobalData[i];
}
}
long staticSize = Math.Min(prg.StaticData.Count, VM_GLOBALMEMSIZE - globalSize) & unchecked((int)0xffFFffFF);
if (staticSize != 0)
{
for (int i = 0; i < staticSize; i++)
// memcpy(Mem+VM_GLOBALMEMADDR+GlobalSize,&Prg->StaticData[0],StaticSize);
{
Mem[VM_GLOBALMEMADDR + (int)globalSize + i] = prg.StaticData[i];
}
}
R[7] = VM_MEMSIZE;
flags = 0;
//UPGRADE_NOTE: There is an untranslated Statement. Please refer to original code. "ms-help://MS.VSCC.v80/dv_commoner/local/redirect.htm?index='!DefaultContextWindowIndex'&keyword='jlca1153'"
List<VMPreparedCommand> preparedCode = prg.AltCommands.Count != 0 ? prg
.AltCommands
: prg.Commands;
if (!ExecuteCode(preparedCode, prg.CommandCount))
{
preparedCode[0].OpCode = VMCommands.VM_RET;
}
int newBlockPos = GetValue(false, Mem, VM_GLOBALMEMADDR + 0x20) & VM_MEMMASK;
int newBlockSize = GetValue(false, Mem, VM_GLOBALMEMADDR + 0x1c) & VM_MEMMASK;
if ((newBlockPos + newBlockSize) >= VM_MEMSIZE)
{
newBlockPos = 0;
newBlockSize = 0;
}
prg.FilteredDataOffset = newBlockPos;
prg.FilteredDataSize = newBlockSize;
prg.GlobalData.Clear();
int dataSize = System.Math.Min(GetValue(false, Mem, VM_GLOBALMEMADDR + 0x30), VM_GLOBALMEMSIZE - VM_FIXEDGLOBALSIZE);
if (dataSize != 0)
{
//prg.GlobalData.Clear();
// ->GlobalData.Add(dataSize+VM_FIXEDGLOBALSIZE);
for (int i = 0; i < dataSize + VM_FIXEDGLOBALSIZE; i++)
// memcpy(&Prg->GlobalData[0],&Mem[VM_GLOBALMEMADDR],DataSize+VM_FIXEDGLOBALSIZE);
{
prg.GlobalData[i] = Mem[VM_GLOBALMEMADDR + i];
}
}
}
public static bool HasFlagFast(this VMFlags value, VMFlags flag)
{
return((value & flag) == flag);
}
private bool ValidateRemainingRelationalNodes(MatchResult match, ILVariableExpression variable, VMFlags flags,
out ILAssignmentStatement varAssignment, out ILExpression flAssignment2, out MatchResult cmpMatch)
{
varAssignment = null;
flAssignment2 = null;
cmpMatch = null;
// Check if __AND_DWORD(var, var)
var(left, right) = GetOperands(match);
if (left.Variable != right.Variable ||
left.Variable != variable.Variable ||
left.Variable.AssignedBy.Count != 1)
{
return(false);
}
// Check if __AND_DWORD(fl2, overflow | sign | zero)
varAssignment = left.Variable.AssignedBy[0];
var flMatch = FLAndConstantPattern.Match(varAssignment.Value);
if (!flMatch.Success)
{
return(false);
}
var constant3 = (ILInstructionExpression)flMatch.Captures["constant"][0];
if ((byte)(uint)constant3.Operand != _constants.GetFlagMask(flags))
{
return(false);
}
// Check if CMP_xxxx(op0, op1)
var flUsage2 = (ILFlagsVariable)((ILVariableExpression)flMatch.Captures["fl"][0]).Variable;
if (flUsage2.ImplicitAssignments.Count != 1)
{
return(false);
}
flAssignment2 = flUsage2.ImplicitAssignments.First();
cmpMatch = ComparePattern.Match(flAssignment2);
if (!cmpMatch.Success)
{
return(false);
}
return(true);
}
private bool TryOptimizeFlagComparison(ILCompilationUnit unit, ILVariableExpression flagUsage, ILFlagsVariable fl, VMFlags flags)
{
// TODO: support other flag combinations.
bool changed = false;
switch (flags)
{
case VMFlags.ZERO:
changed |= TryOptimizeCompareWithZero(unit, fl, flagUsage);
break;
}
return(changed);
}
public int this[VMFlags flag] {
get { return(flagOrder[(int)flag]); }
}
public int this[VMFlags flag] => flagOrder[(int)flag];