/*************************************************************************
* loadLabel
* Load (and validate) a label operand.
*************************************************************************/
void loadLabel(uINSTRUCTION *instr, int opNum)
{
int lab;
if (codeFlag == valid) {
processWhitespace();
switch (yytok) {
case tLabel:
sscanf(yytext, "%*[Ll]%d", &lab);
instr->Operand[opNum].Mode = mLabel;
setOperandValue(&(instr->Operand[opNum]), lab);
validateLabel(lab);
break;
case tEOLN:
case tEOF :
strcpy(loadMessage, "MISSING LABEL OPERAND");
codeFlag = invalidForm;
break;
default:
sprintf(loadMessage, "FOUND %s, EXPECTING LABEL OPERAND", yytext);
codeFlag = invalidForm;
}
}
}
void FreeFormatReader::parse(string line) {
autalities::dos2unix(line);
smatch sm;
if (regex_match(line, sm, FREEFORMAT_REGEX0)) {
label = sm[2];
operation = sm[3];
} else if (regex_match(line, sm, FREEFORMAT_REGEX1)) {
label = sm[2];
operation = sm[3];
operand = sm[4];
autalities::removeTrailingSpaces(operand);
operand = autalities::removeLeadingSpaces(operand);
} else {
valid = false;
addToErrorMessage("can not match line with any valid format");
}
OpTable *opTable = new OpTable();
DirectivseTable *dir = new DirectivseTable();
label = autalities::tolow(label);
if (opTable->hasOperation(label) || dir->contains(label)) {
if (operand.empty()) {
operand = operation;
} else if (!operation.empty()) {
operand = operation + " " + operand;
}
operation = label;
label = "";
}
validateLabel();
validateOperation();
args = OperandValidator::getOperands(operand);
cout << "\"" << label << "\", \"" << operation << "\", \"" << operand << "\"" << endl;
}
/*************************************************************************
* uLoad
* "Parse" a uCode source program (using flex to scan it).
*************************************************************************/
int uLoad(uINSTRUCTION code[], int label[])
{
uINSTRUCTION *currInstr;
int codeLine = 0;
int i, lab;
do {
currInstr = &(code[codeLine]);
clearInstruction(currInstr);
codeFlag = valid;
loadOpcode(currInstr);
if (codeFlag == valid) {
switch (yytok) {
case tHLT:
break;
case tRD:
case tRDF:
case tRDS:
loadTarget(currInstr, 0);
break;
case tWRT:
case tWRTLN:
loadSource(currInstr, 0);
break;
case tWRTS:
case tWRTLNS:
break;
case tMOV :
case tNEG :
case tNEGF :
case tCASTI:
case tCASTF:
loadSource(currInstr, 0);
loadTarget(currInstr, 1);
break;
case tADD :
case tSUB :
case tMUL :
case tDIV :
case tMOD :
case tADDF :
case tSUBF :
case tMULF :
case tDIVF :
loadSource(currInstr, 0);
loadSource(currInstr, 1);
loadTarget(currInstr, 2);
break;
case tPUSH:
loadSource(currInstr, 0);
break;
case tPOP :
loadTarget(currInstr, 0);
break;
case tNEGS:
case tADDS:
case tSUBS:
case tMULS:
case tDIVS:
case tMODS:
case tNEGSF:
case tADDSF:
case tSUBSF:
case tMULSF:
case tDIVSF:
case tCASTSI:
case tCASTSF:
break;
/* Label instruction must be handled at load time */
case tLAB :
{
sscanf(yytext, "%*[Ll]%d:", &lab);
currInstr->Operand[0].Mode = mLabel;
setOperandValue(&(currInstr->Operand[0]), lab);
validateLabel(lab);
if (codeFlag == valid) {
if (label[lab] != undefinedLabel) {
sprintf(loadMessage, "L%d REDEFINED", lab);
codeFlag = badLabel;
} else {
label[lab] = codeLine;
}
}
break;
}
case tANDS:
case tORS:
case tNOTS:
break;
case tCMPEQS:
case tCMPGES:
case tCMPGTS:
case tCMPLES:
case tCMPLTS:
case tCMPNES:
case tCMPEQSF:
case tCMPGESF:
case tCMPGTSF:
case tCMPLESF:
case tCMPLTSF:
case tCMPNESF:
break;
case tBRTS:
case tBRFS:
loadLabel(currInstr, 0);
break;
case tBR :
loadLabel(currInstr, 0);
break;
case tBEQ :
case tBGE :
case tBGT :
case tBLE :
case tBLT :
case tBNE :
case tBEQF :
case tBGEF :
case tBGTF :
case tBLEF :
case tBLTF :
case tBNEF :
loadSource(currInstr, 0);
loadSource(currInstr, 1);
loadLabel (currInstr, 2);
break;
case tCALL:
loadLabel(currInstr, 0);
break;
case tRET :
break;
case tEOF :
break;
case tPRTS:
case tPRTR:
break;
default:
perror(">>> INTERNAL ERROR IN LOAD_uCODE <<<");
exit(1);
}
loadEnd();
}
/* Print an error message if an error occured */
if (codeFlag != valid) {
loadError(loadText, loadLine, loadMessage);
switch (codeFlag) {
case invalidOpcode:
break;
case invalidForm:
printCorrectForm(currInstr->Opcode);
break;
case invalidRegister:
fprintf(stderr, "\n VALID RegisterS RANGE FROM 0 to ");
fprintf(stderr, "%d", registerCount);
fprintf(stderr, "\n");
break;
case invalidLabel:
fprintf(stderr, "\n VALID LABELS RANGE FROM 0 to ");
fprintf(stderr, "%d", labelCount);
fprintf(stderr, "\n");
break;
case badLabel:
case invalidString:
break;
default:
perror(">>> INTERNAL ERROR IN uLOAD <<<");
exit(1);
}
}
/* Process debugging information and update counters */
fillInformation(currInstr, loadText, loadLine);
loadText[0] = '\0';
loadLine++;
codeLine++;
if (codeLine >= codeSize) {
fprintf(stderr, ">>> CODE MEMORY OVERFLOW <<<\n");
exit(1);
}
} while (yytok != tEOF);
/* Resolve labels if source was loaded successfully */
if (loadFlag == valid) {
for (i = 0; i < labelCount; i++) {
lab = label[i];
while ((lab < 0) && (lab != undefinedLabel)) {
label[i] = label[-label[i]];
lab = label[i];
}
}
}
return (loadFlag == valid) ?1 :0;
}
