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endcode.c
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endcode.c
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struct endcode {
char line[128];
struct endcode *next;
};
void gnlvcode(char name[30]);
void loadvr(char variable[30], int registerNum);
void storerv(int registerNum, char variable[30]);
void addToEndcode(char input[128]);
void endcodeGeneration();
void whichRelop(char *input, char *relopSign);
int isRelop(char input[30]);
void exportEndcode(struct endcode *endcodeHead);
void debugPrintEndcode(struct endcode *endcodeHead);
struct endcode *endcodeHead;
int i_counter = 0; // Counter for Function Parameters
void addToEndcode(char input[128]) {
struct endcode *current, *new_node;
current = endcodeHead;
new_node = malloc(sizeof(struct endcode));
strcpy(new_node->line, input);
if(endcodeHead == NULL) {
endcodeHead = new_node;
new_node->next = NULL;
} else {
while (current->next != NULL) {
current = current->next;
}
current->next = new_node;
new_node->next = NULL;
}
debugPrintEndcode(endcodeHead);
}
void gnlvcode(char name[30]) {
struct entity *currentEntity;
currentEntity = lookupEntity(name);
char gnlvOutput[128];
sprintf(gnlvOutput, "\tmovi R[255], M[4+R[0]]\n");
addToEndcode(gnlvOutput);
while( currentEntity->nestingLevel != scopeHead->nestingLevel ) {
sprintf(gnlvOutput, "\tmovi R[255], M[4+R[255]]\n");
addToEndcode(gnlvOutput);
currentEntity->nestingLevel++;
}
sprintf(gnlvOutput, "\tmovi R[254], %d\n", currentEntity->offset);
addToEndcode(gnlvOutput);
sprintf(gnlvOutput, "\taddi R[255], R[254], R[255]\n");
addToEndcode(gnlvOutput);
}
void loadvr(char variable[30], int registerNum) {
printf("Inside loadvr: START\n\n");
char generatedCode[128];
struct entity *foundEntity;
foundEntity = lookupEntity(variable);
if(isdigit(variable[0])) {
printf("Inside loadvr: 1\n\n");
sprintf(generatedCode,"\tmovi R[%d], %s\n", registerNum, variable);
addToEndcode(generatedCode);
} else if (foundEntity->nestingLevel == 1 && foundEntity->type != TEMPORARY_VARIABLE) {
printf("Inside loadvr: 2\n\n");
// Case: Global Variable
sprintf(generatedCode, "\tmovi R[%d], M[%d]\n", registerNum, 600+foundEntity->offset);
addToEndcode(generatedCode);
} else if (foundEntity->nestingLevel == scopeHead->nestingLevel) {
// Entity resides in current scope:
printf("Inside loadvr: 3\n\n");
if(foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE) || foundEntity->type == TEMPORARY_VARIABLE){
printf("Inside loadvr: 3->1\n\n");
sprintf(generatedCode, "\tmovi R[%d], M[%d+R[0]]\n", registerNum, foundEntity->offset);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
printf("Inside loadvr: 3->2\n\n");
sprintf(generatedCode, "\tmovi R[255], M[%d+R[0]]\n", foundEntity->offset);
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[%d], M[R[255]]\n", registerNum);
addToEndcode(generatedCode);
}
} else if (foundEntity->nestingLevel < scopeHead->nestingLevel) {
printf("Inside loadvr: 4\n\n");
if(foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE)) {
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi R[%d], M[R[255]]\n", registerNum);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi R[255], M[R[255]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[%d], M[R[255]]\n", registerNum);
addToEndcode(generatedCode);
}
}
}
void storerv(int registerNum, char variable[30]) {
printf("Inside StoreRV: GENERAL\n");
char generatedCode[128];
struct entity *foundEntity;
foundEntity = lookupEntity(variable);
if (foundEntity->nestingLevel == 1 && foundEntity->type != TEMPORARY_VARIABLE) {
printf("Inside StoreRV: 1\n");
// Case: Global Variable
sprintf(generatedCode, "\tmovi M[%d], R[%d]\n", 600+foundEntity->offset, registerNum);
addToEndcode(generatedCode);
} else if (foundEntity->nestingLevel == scopeHead->nestingLevel) {
printf("Inside StoreRV: 2\n");
if(foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE) || foundEntity->type == TEMPORARY_VARIABLE ) {
printf("Inside StoreRV: 2->1\n");
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[%d]\n", foundEntity->offset, registerNum);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
printf("Inside StoreRV: 2->2\n");
sprintf(generatedCode, "\tmovi R[255], M[%d+R[0]]\n", foundEntity->offset);
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[R[255]], R[%d]\n", registerNum);
addToEndcode(generatedCode);
}
} else if (foundEntity->nestingLevel < scopeHead->nestingLevel) {
printf("Inside StoreRV: 3\n");
if (foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE )) {
printf("Inside StoreRV: 3->1\n");
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi M[R[255]], R[%d]\n", registerNum);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
printf("Inside StoreRV: 3->2\n");
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi R[255], M[R[255]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[R[255]], R[%d]\n", registerNum);
addToEndcode(generatedCode);
}
}
}
void endcodeGeneration() {
printf("Debug: Endcode Generation.\n");
char generatedCode[128];
// This keeps the print pointer to the same place, in between
// changes of scopes:
if(checkForEndcodeQuadPointerIfAlreadyInitialized == 0){
currentEndcode = quad_list_head;
checkForEndcodeQuadPointerIfAlreadyInitialized = 1;
} else {
currentEndcode = previousCurrentEndcode;
currentEndcode = currentEndcode->next;
}
while (currentEndcode != NULL) {
printf("Debug: Endcode Generation LOOP.\n");
sprintf(generatedCode, "L%d: \n", currentEndcode->quartet.label);
addToEndcode(generatedCode);
if(strcmp(currentEndcode->quartet.operator, "jump") == 0) {
sprintf(generatedCode, "\tjmp L%s\n", currentEndcode->quartet.result);
addToEndcode(generatedCode);
} else if( isRelop(currentEndcode->quartet.operator) == 1 ) {
loadvr(currentEndcode->quartet.argument1, 1);
loadvr(currentEndcode->quartet.argument2, 2);
sprintf(generatedCode, "\tcmpi R[1], R[2]\n");
addToEndcode(generatedCode);
char relopSign[30];
whichRelop(currentEndcode->quartet.operator, relopSign);
sprintf(generatedCode, "\t%s L%s\n", relopSign, currentEndcode->quartet.result);
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, ":=") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
storerv(1, currentEndcode->quartet.result);
} else if (strcmp(currentEndcode->quartet.operator, "+") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
loadvr(currentEndcode->quartet.argument2, 2);
sprintf(generatedCode, "\taddi R[3], R[1], R[2]\n");
addToEndcode(generatedCode);
storerv(3, currentEndcode->quartet.result);
} else if (strcmp(currentEndcode->quartet.operator, "-") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
loadvr(currentEndcode->quartet.argument2, 2);
sprintf(generatedCode, "\tsubi R[3], R[1], R[2]\n");
addToEndcode(generatedCode);
storerv(3, currentEndcode->quartet.result);
} else if (strcmp(currentEndcode->quartet.operator, "*") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
loadvr(currentEndcode->quartet.argument2, 2);
sprintf(generatedCode, "\tmuli R[3], R[1], R[2]\n");
addToEndcode(generatedCode);
storerv(3, currentEndcode->quartet.result);
} else if (strcmp(currentEndcode->quartet.operator, "/") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
loadvr(currentEndcode->quartet.argument2, 2);
sprintf(generatedCode, "\tdivi R[3], R[1], R[2]\n");
addToEndcode(generatedCode);
storerv(3, currentEndcode->quartet.result);
} else if (strcmp(currentEndcode->quartet.operator, "out") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
sprintf(generatedCode, "\touti R[1]\n");
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, "in") == 0) {
sprintf(generatedCode, "\tini R[1]\n");
storerv(1, currentEndcode->quartet.argument1);
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, "retv") == 0) {
loadvr(currentEndcode->quartet.argument1, 1);
sprintf(generatedCode, "\tmovi R[255], M[8+R[0]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[R[255]], R[1]\n");
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, "par") == 0) {
struct entity *foundEntity;
foundEntity = lookupEntity(currentEndcode->quartet.argument1);
if (strcmp(currentEndcode->quartet.argument2, "CV") == 0) {
int d = (scopeHead->framelength)+12+(4*i_counter);
i_counter++;
loadvr(currentEndcode->quartet.argument1, 255);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[255]\n", d);
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.argument2, "REF") == 0) {
int d = (scopeHead->framelength)+12+(4*i_counter);
i_counter++;
if(foundEntity->nestingLevel == scopeHead->nestingLevel) {
if(foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE) ) {
sprintf(generatedCode, "\tmovi R[255], R[0]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[254], %d\n", foundEntity->offset);
addToEndcode(generatedCode);
sprintf(generatedCode, "\taddi R[255], R[254], R[255]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[255]\n", d);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
sprintf(generatedCode, "\tmovi R[255], R[0]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[254], %d\n", foundEntity->offset);
addToEndcode(generatedCode);
sprintf(generatedCode, "\taddi R[255], R[254], R[255]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[1], M[R[255]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[1]\n", d);
addToEndcode(generatedCode);
}
} else if (strcmp(currentEndcode->quartet.argument2, "RET") == 0) {
sprintf(generatedCode, "\tmovi R[255], R[0]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[254], %d\n", foundEntity->offset);
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[255], R[254], R[255]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[255]\n", scopeHead->framelength+8);
addToEndcode(generatedCode);
} else {
if(foundEntity->type == VARIABLE_E || (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_VALUE) ) {
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[255]\n", d);
addToEndcode(generatedCode);
} else if (foundEntity->type == PARAMETER && foundEntity->parMode == PASS_BY_REFERENCE) {
gnlvcode(foundEntity->name);
sprintf(generatedCode, "\tmovi R[1], M[R[255]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[1]\n", d);
addToEndcode(generatedCode);
}
}
}
} else if (strcmp(currentEndcode->quartet.operator, "call") == 0) {
struct entity *foundEntity;
foundEntity = lookupEntity(currentEndcode->quartet.argument1);
if(foundEntity->nestingLevel == scopeHead->nestingLevel) {
sprintf(generatedCode, "\tmovi R[255], M[4+R[0]]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[255]\n", scopeHead->framelength+4);
addToEndcode(generatedCode);
} else if (foundEntity->nestingLevel > scopeHead->nestingLevel) {
sprintf(generatedCode, "\tmovi M[%d+R[0]], R[0]\n", scopeHead->framelength+4);
addToEndcode(generatedCode);
}
sprintf(generatedCode, "\tmovi R[255], %d\n", scopeHead->framelength);
addToEndcode(generatedCode);
sprintf(generatedCode, "\taddi R[0], R[255], R[0]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[255], $\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[254], 15\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\taddi R[255], R[255], R[254]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi M[R[0]], R[255]\n");
addToEndcode(generatedCode);
sprintf(generatedCode, "\tjmp L%d\n", foundEntity->startQuad);
addToEndcode(generatedCode);
sprintf(generatedCode, "\tmovi R[255], %d\n", scopeHead->framelength);
addToEndcode(generatedCode);
sprintf(generatedCode, "\tsubi R[0], R[0], R[255]\n");
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, "end_block") == 0) {
if (areWeInMainBlock != 1) {
sprintf(generatedCode, "\tjmp M[R[0]]\n");
addToEndcode(generatedCode);
}
} else if (strcmp(currentEndcode->quartet.operator, "begin_block") == 0) {
sprintf(generatedCode, "\t\n");
addToEndcode(generatedCode);
} else if (strcmp(currentEndcode->quartet.operator, "halt") == 0) {
sprintf(generatedCode, "\thalt\n");
addToEndcode(generatedCode);
}
previousCurrentEndcode = currentEndcode;
currentEndcode = currentEndcode->next;
}
}
int isRelop(char input[30]) {
if(strcmp(input, "=") == 0 || strcmp(input, "<>") == 0 || strcmp(input, "<") == 0 || strcmp(input, "<=") == 0 || strcmp(input, ">") == 0 || strcmp(input, ">=") == 0 ) {
return(1);
} else {
return(0);
}
}
void whichRelop(char *input, char *relopSign) {
if( strcmp(input, "=") == 0 ) {
strcpy(relopSign, "je");
}
if( strcmp(input, "<>") == 0 ) {
strcpy(relopSign, "jne");
}
if( strcmp(input, "<") == 0 ) {
strcpy(relopSign, "ja");
}
if ( strcmp(input, "<=") == 0 ) {
strcpy(relopSign, "jae");
}
if( strcmp(input, ">") == 0 ) {
strcpy(relopSign, "jb");
}
if ( strcmp(input, ">=") == 0 ) {
strcpy(relopSign, "jbe");
}
}
void debugPrintEndcode(struct endcode *endcodeHead) {
// Print the Node list:
struct endcode *current = endcodeHead;
printf("\n--Debug Endcode Print--\n");
while (current != NULL) {
printf("%s", current->line);
current = current->next;
}
printf("\n-- End of Debug Endcode--\n\n");
}
void exportEndcode(struct endcode *endcodeHead) {
printf("-- Starting Export of Endcode to .msim file --\n\n");
if (endcodeOutputFile == NULL) {
printf("Error opening file!\n");
exit(1);
}
fprintf(endcodeOutputFile, "\n");
// Print the Node list:
struct endcode *current = endcodeHead;
while (current != NULL) {
fprintf(endcodeOutputFile, "%s", current->line);
current = current->next;
}
}