bool CThumbInstruction::LoadEncoding(const tThumbOpcode& SourceOpcode, char* Line)
{
char ImmediateBuffer[512];
int p,RetLen;
CStringList List;
bool Immediate = false;
char* SourceEncoding = SourceOpcode.mask;
char* OriginalLine = Line;
while (*Line == ' ' || *Line == '\t') Line++;
tArmRegisterInfo* Info;
if (!(*SourceEncoding == 0 && *Line == 0))
{
while (*SourceEncoding != NULL)
{
while (*Line == ' ' || *Line == '\t') Line++;
// if (*Line == 0) return false;
switch (*SourceEncoding)
{
case 'd': case 's': case 'n': case 'o':
case 'D': case 'S': // registers
for (int i = 0; ; i++)
{
if (RegisterLookup[i].Character == *SourceEncoding)
{
Info = (tArmRegisterInfo*)((int) (&Vars) + RegisterLookup[i].StructOffset);
if (ArmGetRegister(Line,RetLen,*Info) == false) return false;
if (Info->Number > RegisterLookup[i].MaxNum) return false;
Line += RetLen;
SourceEncoding++;
break;
}
}
break;
/* case 'd': // low reg
if (ArmGetRegister(Line,RetLen,Vars.rd) == false) return false;
if (Vars.rd.Number > 7) return false;
Line += RetLen;
SourceEncoding++;
break;
case 's': // low reg
if (ArmGetRegister(Line,RetLen,Vars.rs) == false) return false;
if (Vars.rs.Number > 7) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'n': // low reg
if (ArmGetRegister(Line,RetLen,Vars.rn) == false) return false;
if (Vars.rn.Number > 7) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'o': // low reg
if (ArmGetRegister(Line,RetLen,Vars.ro) == false) return false;
if (Vars.ro.Number > 7) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'D': // high reg
if (ArmGetRegister(Line,RetLen,Vars.rd) == false) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'S': // high reg
if (ArmGetRegister(Line,RetLen,Vars.rs) == false) return false;
Line += RetLen;
SourceEncoding++;
break;*/
case 'I': // immediate
case 'i':
if (ArmCheckImmediate(Line,ImmediateBuffer,RetLen,List) == false) return false;
Vars.ImmediateBitLen = *(SourceEncoding+1);
Line += RetLen;
SourceEncoding += 2;
break;
case 'r': // forced register
if (ArmGetRegister(Line,RetLen) != *(SourceEncoding+1)) return false;
Line += RetLen;
SourceEncoding += 2;
break;
case 'R': // rlist
memcpy(&p,&SourceEncoding[1],2);
if (ArmGetRlist(Line,RetLen,p,Vars.rlist) == false) return false;
memcpy(Vars.RlistStr,Line,RetLen);
Vars.RlistStr[RetLen] = 0;
Line += RetLen;
SourceEncoding += 3;
break;
case '/': // optional characters
if (*Line == *(SourceEncoding+1)) Line++;
SourceEncoding += 2;
break;
default: // everything else
if (*SourceEncoding++ != *Line++) return false;
break;
}
}
}
while (*Line == ' ' || *Line == '\t') Line++;
if (*Line != 0) return false; // there's something else, bad
// opcode is ok - now set all flags
Opcode = SourceOpcode;
if (Opcode.flags & THUMB_IMMEDIATE)
{
if (CheckPostfix(List,true) == false)
{
Logger::printError(Logger::Error,L"Invalid expression \"%S\"",ImmediateBuffer);
NoCheckError = true;
return false;
}
Vars.ImmediateExpression.Load(List);
}
OpcodeSize = Opcode.flags & THUMB_LONG ? 4 : 2;
return true;
}
/*
case 'M': // cop register m
if (ArmGetCopRegister(Line,RetLen,Vars.CopData.cm) == false) return false;
Line += RetLen;
SourceEncoding++;*/
bool CArmInstruction::LoadEncoding(const tArmOpcode& SourceOpcode, char* Line)
{
int RetLen;
bool Immediate = false;
Vars.psr= false;
Vars.writeback = false;
Vars.SignPlus = false;
Vars.Opcode.UseNewEncoding = false;
Vars.Opcode.UseNewType = false;
char* SourceEncoding = (char*)(SourceOpcode.mask);
char* OriginalLine = Line;
while (*Line == ' ' || *Line == '\t') Line++;
tArmRegisterInfo* Info;
if (!(*SourceEncoding == 0 && *Line == 0))
{
while (*SourceEncoding != 0)
{
while (*Line == ' ' || *Line == '\t') Line++;
// if (*Line == 0) return false;
switch (*SourceEncoding)
{
case 'd': case 's': case 'n': case 'm':
case 'D': case 'N': case 'M': // all of them are registers
for (int i = 0; ; i++)
{
if (RegisterLookup[i].Character == *SourceEncoding)
{
Info = (tArmRegisterInfo*)((uintptr_t) (&Vars) + RegisterLookup[i].StructOffset);
if (RegisterLookup[i].type == ARMREG_NORMAL)
{
if (ArmGetRegister(Line,RetLen,*Info) == false) return false;
if (*(SourceEncoding+1) == '1' && Info->Number == 15) return false;
Line += RetLen;
SourceEncoding += 2;
} else {
if (ArmGetCopRegister(Line,RetLen,*Info) == false) return false;
Line += RetLen;
SourceEncoding++;
}
break;
}
}
break;
/* case 'd': // reg
if (ArmGetRegister(Line,RetLen,Vars.rd) == false) return false;
if (*(SourceEncoding+1) == '1' && Vars.rd.Number == 15) return false;
Line += RetLen;
SourceEncoding += 2;
break;
case 's': // reg
if (ArmGetRegister(Line,RetLen,Vars.rs) == false) return false;
if (*(SourceEncoding+1) == '1' && Vars.rs.Number == 15) return false;
Line += RetLen;
SourceEncoding += 2;
break;
case 'n': // reg
if (ArmGetRegister(Line,RetLen,Vars.rn) == false) return false;
if (*(SourceEncoding+1) == '1' && Vars.rn.Number == 15) return false;
Line += RetLen;
SourceEncoding += 2;
break;
case 'm': // reg
if (ArmGetRegister(Line,RetLen,Vars.rm) == false) return false;
if (*(SourceEncoding+1) == '1' && Vars.rm.Number == 15) return false;
Line += RetLen;
SourceEncoding += 2;
break;*/
case 'W': // writeback
if (*Line == '!')
{
Vars.writeback = true;
Line++;
}
SourceEncoding++;
break;
case 'p': // psr
if (*Line == '^')
{
Vars.psr = true;
Line++;
}
SourceEncoding++;
break;
case 'P': // msr/mrs psr data
if (strncmp(Line,"cpsr",4) == 0) // is cpsr
{
Vars.PsrData.spsr = false;
Line += 4;
} else if (strncmp(Line,"spsr",4) == 0) // is spsr
{
Vars.PsrData.spsr = true;
Line += 4;
} else return false; // otherwise it's neither
if (SourceEncoding[1] != '1')
{
if (*Line != '_') // no underscore = short version
{
Vars.PsrData.field = 0xF;
} else {
Line++;
if (memcmp(Line,"ctl",3) == 0)
{
Vars.PsrData.field = 1;
Line += 3;
} else if (memcmp(Line,"flg",3) == 0)
{
Vars.PsrData.field = 8;
Line += 3;
} else {
Vars.PsrData.field = 0;
for (int i = 0; i < 4; i++)
{
if (*Line == ',') break;
if (*Line == 'f')
{
if (Vars.PsrData.field & 8) return false; // can only appear once
Vars.PsrData.field |= 8;
} else if (*Line == 's')
{
if (Vars.PsrData.field & 4) return false; // can only appear once
Vars.PsrData.field |= 4;
} else if (*Line == 'x')
{
if (Vars.PsrData.field & 2) return false; // can only appear once
Vars.PsrData.field |= 2;
} else if (*Line == 'c')
{
if (Vars.PsrData.field & 1) return false; // can only appear once
Vars.PsrData.field |= 1;
} else return false; // has to be one of those
Line++;
}
}
}
}
SourceEncoding+=2;
break;
case 'R': // rlist
if (ArmGetRlist(Line,RetLen,0xFFFF,Vars.rlist) == false) return false;
memcpy(Vars.RlistStr,Line,RetLen);
Vars.RlistStr[RetLen] = 0;
Line += RetLen;
SourceEncoding++;
break;
case 'S':
if (ParseShift(Line,SourceEncoding[1]) == false) return false;
SourceEncoding += 2;
break;
case 'I': // immediate
case 'i':
if (ArmParseImmediate(Line,Vars.ImmediateExpression,RetLen) == false) return false;
Line += RetLen;
Vars.ImmediateBitLen = 32;
SourceEncoding++;
break;
case 'j': // variable bit immediate
if (ArmParseImmediate(Line,Vars.ImmediateExpression,RetLen) == false) return false;
Line += RetLen;
Vars.ImmediateBitLen = *(SourceEncoding+1);
SourceEncoding+=2;
break;
case '/': // optional character
if (*Line == *(SourceEncoding+1)) Line++;
SourceEncoding += 2;
break;
/* case 'D': // cop register d
if (ArmGetCopRegister(Line,RetLen,Vars.CopData.cd) == false) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'N': // cop register n
if (ArmGetCopRegister(Line,RetLen,Vars.CopData.cn) == false) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'M': // cop register m
if (ArmGetCopRegister(Line,RetLen,Vars.CopData.cm) == false) return false;
Line += RetLen;
SourceEncoding++;
break;*/
case 'X': // cop number
if (ArmGetCopNumber(Line,RetLen,Vars.CopData.pn) == false) return false;
Line += RetLen;
SourceEncoding++;
break;
case 'Y': // cop opcode number
if (ArmParseImmediate(Line,Vars.CopData.CpopExpression,RetLen) == false)
{
Logger::printError(Logger::Error,L"Invalid expression");
NoCheckError = true;
return false;
}
Vars.ImmediateBitLen = 4;
Line += RetLen;
SourceEncoding++;
break;
case 'Z': // cop info number
if (ArmParseImmediate(Line,Vars.CopData.CpinfExpression,RetLen) == false)
{
Logger::printError(Logger::Error,L"Invalid expression");
NoCheckError = true;
return false;
}
Vars.ImmediateBitLen = 3;
Line += RetLen;
SourceEncoding++;
break;
case 'z': // shift for pseudo opcodes
Vars.Shift.Type = SourceEncoding[1];
if (ArmGetRegister(Line,RetLen,Vars.Shift.reg) == true) // shift by register
{
Vars.Shift.ShiftByRegister = true;
} else { // shift by immediate
Vars.Shift.ShiftByRegister = false;
if (ArmParseImmediate(Line,Vars.Shift.ShiftExpression,RetLen) == false)
{
Logger::printError(Logger::Error,L"Invalid shift expression");
NoCheckError = true;
return false;
}
}
Line += RetLen;
Vars.Shift.UseShift = true;
SourceEncoding += 2;
break;
case 'v': // sign for register index parameter
if (*Line == '-')
{
Vars.SignPlus = false;
Line++;
} else if (*Line == '+')
{
Vars.SignPlus = true;
Line++;
} else {
Vars.SignPlus = true;
}
SourceEncoding++;
break;
default: // everything else
if (*SourceEncoding++ != *Line++) return false;
break;
}
}
}
while (*Line == ' ' || *Line == '\t') Line++;
if (*Line != 0) return false; // there's something left, bad
// opcode is fine - now set all flags
Opcode = SourceOpcode;
return true;
}
