static void buildin_collectgarbage(const vector<LuaValue>& args, vector<LuaValue>& rets) {
auto mgr = LuaVM::instance()->getGCObjManager();
int oldObjCount = mgr->getObjCount();
mgr->performFullGC();
int newObjCount = mgr->getObjCount();
rets.push_back(LuaValue(oldObjCount));
rets.push_back(LuaValue(newObjCount));
}
void emit_assign(FILE *outFile, char * assMe, struct to_pass *reg){
int currOCount;
/*currOCount = getObjCount();
fprintf(outFile, "%d r%d := %d\n", currOCount, reg.base_reg_num , expr_value);
*/
int walk_back = 0;
struct node *result;
fprintf(outFile, "Searching for variable %s on the left side\n", assMe);
result = search_stack(assMe, &walk_back);
if(result != NULL){
if(walk_back > 0){
int current_reg = getRegNum();
emit_walkback(outFile, current_reg, walk_back, 0);
currOCount = getObjCount();
if(reg->isLocal){
fprintf(outFile, "%d contents r%d, %d := contents b, %d\n", currOCount, current_reg, result->offSet, reg->offSet);
} else {
fprintf(outFile, "%d contents r%d, %d := ", currOCount, current_reg, result->offSet);
if(reg->offSet == 0){
fprintf(outFile, "r%d\n", reg->base_reg_num);
} else{
fprintf(outFile, "contents r%d, %d\n", reg->base_reg_num, reg->offSet);
}
}
}
else{
currOCount = getObjCount();
if(reg->isLocal){
fprintf(outFile, "%d contents b, %d := contents b, %d\n", currOCount, result->offSet, reg->offSet);
} else {
fprintf(outFile, "%d contents b, %d := ", currOCount, result->offSet);
if(reg->offSet == 0){
fprintf(outFile, "r%d\n", reg->base_reg_num);
} else {
fprintf(outFile, "contents r%d, %d\n", reg->base_reg_num, reg->offSet);
}
}
}
}
else{
fprintf(outFile, "Variable %s was not found\n", assMe);
}
return;
}
struct to_pass *emit_mult(FILE *outFile, struct to_pass *leftSide, char operator, struct to_pass *rightSide){
struct to_pass *multRes = NULL;
int reg_num = getRegNum();
int currObj;
multRes = malloc(sizeof(struct to_pass));
multRes->base_reg_num = reg_num;
multRes->offSet = 0;
multRes->isLocal = 0;
multRes->isVar = 1;//Results won't have an actual value, therefore should be referred to with a register
fprintf(outFile, "Emit Multi\n");
currObj = getObjCount();
if(leftSide->isLocal){
fprintf(outFile, "%d r%d := contents b, %d %c ", currObj, reg_num, leftSide->offSet, operator);
} else if(leftSide->offSet == 0){
fprintf(outFile, "%d r%d := r%d %c ", currObj, reg_num, leftSide->base_reg_num, operator);
} else {
fprintf(outFile, "%d r%d := contents r%d, %d %c ", currObj, reg_num, leftSide->base_reg_num, leftSide->offSet, operator);
}
if(rightSide->isLocal){
fprintf(outFile, "contents b, %d\n", rightSide->offSet);
} else if(rightSide->offSet == 0){
fprintf(outFile, "r%d\n", rightSide->base_reg_num);
} else {
fprintf(outFile, "contents r%d, %d\n", rightSide->base_reg_num, rightSide->offSet);
}
return multRes;
}
void emit_walkback(FILE *outFile, int reg_num, int walkback, int isProc){
int i;
int currOC;
if(!isProc){ //Line already outputted for dynamic walkbacks
currOC = getObjCount();
fprintf(outFile, "%d r%d := b\n", currOC, reg_num);
}
for(i = walkback; i > 0; i--){
currOC = getObjCount();
fprintf(outFile, "Emitting Walkback\n");
if(isProc && i == 1){
fprintf(outFile, "%d contents b, 2 := contents r%d, 2\n", currOC, reg_num);
} else{
fprintf(outFile, "%d r%d := contents r%d, 2\n", currOC, reg_num, reg_num);
}
}
/*if(isProc){
currOC = getObjCount();
fprintf(outFile, "%d contents b, 2 := r%d\n", currOC, reg_num);
}*/
}
struct to_pass *emit_relat(FILE *outFile, int left_reg, char *operator, int right_reg){
struct to_pass *multRes = NULL;
int reg_num = getRegNum();
int currObj;
multRes = malloc(sizeof(struct to_pass));
multRes->base_reg_num = reg_num;
multRes->offSet = 0;
multRes->isLocal = 0;
multRes->isVar = 1; //Results won't have an actual value, therefore should be referred to with a register
fprintf(outFile, "Emit Bool\n");
currObj = getObjCount();
if((strcmp(operator, ">") == 0)){
fprintf(outFile, "%d r%d := r%d < r%d\n", currObj, multRes->base_reg_num, right_reg, left_reg);
} else if((strcmp(operator, ">=") == 0)){
fprintf(outFile, "%d r%d := r%d <= r%d\n", currObj, multRes->base_reg_num, right_reg, left_reg);
} else {
fprintf(outFile, "%d r%d := r%d %s r%d\n", currObj, multRes->base_reg_num, left_reg, operator, right_reg);
}
/*if(leftSide->isLocal){
fprintf(outFile, "%d r%d := contents b, %d ", currObj, reg_num, leftSide->offSet);
} else if(leftSide->offSet == 0){
fprintf(outFile, "%d r%d := r%d ", currObj, reg_num, leftSide->base_reg_num);
} else {
fprintf(outFile, "%d r%d := contents r%d, %d ", currObj, reg_num, leftSide->base_reg_num, leftSide->offSet);
}*/
/*if(strcmp(operator, ">") == 0){
fprintf(outFile, "< ");
} else if(strcmp(operator, ">=") == 0){
fprintf(outFile, "<= ");
} else {
fprintf(outFile, "%s ", operator);
}*/
/*if(rightSide->isLocal){
fprintf(outFile, "contents b, %d\n", rightSide->offSet);
} else if(rightSide->offSet == 0){
fprintf(outFile, "r%d\n", rightSide->base_reg_num);
} else {
fprintf(outFile, "contents r%d, %d\n", rightSide->base_reg_num, rightSide->offSet);
}*/
return multRes;
}
struct to_pass *emit_expo(FILE *outFile, struct to_pass *base, struct to_pass *power){
int currObj;
char *baseRef;
int powerReg;
int compReg;
struct to_pass *multRes = NULL;
multRes = malloc(sizeof(struct to_pass));
multRes->offSet = 0;
multRes->isLocal = 0;
multRes->isVar = 1; //Results won't have an actual value, therefore should be referred to with a register
//Set up reference for the base and the power
if(base->isVar){
if(base->isLocal){
baseRef = malloc(sizeof("contents b, 0 ") + 1);
sprintf(baseRef, "contents b, %d ", base->offSet);
}
else {
baseRef = malloc(sizeof("contents r0, 0 ") + 1);
sprintf(baseRef, "contents r%d, %d ", base->base_reg_num, base->offSet);
}
}
else {
baseRef = malloc(sizeof("r0 ") + 1);
sprintf(baseRef, "r%d ", base->base_reg_num);
}
//Store power in register
if(power->isVar){
currObj = getObjCount();
if(power->isLocal){
currObj = getObjCount();
powerReg = getRegNum();
fprintf(outFile, "%d r%d := contents b, %d\n", currObj, powerReg, power->offSet);
}
else {
powerReg = getRegNum();
fprintf(outFile, "%d r%d := contents r%d, %d\n", currObj, powerReg, power->base_reg_num, power->offSet);
}
}
else {
powerReg = power->base_reg_num;
}
//Set registers for zero, one and the result
int regZero = getRegNum();
int regOne = getRegNum();
int result_reg = getRegNum();
multRes->base_reg_num = result_reg; //Pass up result's register
fprintf(outFile, "Emit Exponent\n");
currObj = getObjCount();
fprintf(outFile, "%d r%d := 0\n", currObj, regZero);
currObj = getObjCount();
fprintf(outFile, "%d r%d := 1\n", currObj, regOne);
//Store base in result register
currObj = getObjCount();
fprintf(outFile, "%d r%d := %s\n", currObj, result_reg, baseRef);
//Output if power <= 0 jump?
currObj = getObjCount();
compReg = getRegNum();
//First store comparison
fprintf(outFile, "%d r%d := r%d <= r%d\n", currObj, compReg, powerReg, regZero);
currObj = getObjCount();
fprintf(outFile, "%d pc := %d if r%d\n", currObj, currObj + 6, compReg);
//Output multiplication
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d * %s\n", currObj, result_reg, result_reg, baseRef);
//Output decrement of power
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d - r%d\n", currObj, powerReg, powerReg, regOne);
//Output if power > 0 multiply again
currObj = getObjCount();
compReg = getRegNum();
//First store comparison
fprintf(outFile, "%d r%d := r%d < r%d\n", currObj, compReg, regZero, powerReg);
currObj = getObjCount();
fprintf(outFile, "%d pc := %d if r%d\n", currObj, currObj - 3, compReg); //Mult is 3 lines back
//Output jump out of expression
currObj = getObjCount();
fprintf(outFile, "%d pc := %d\n", currObj, currObj + 10);
//Output jump to setting result to 1 because power started at 0
currObj = getObjCount();
compReg = getRegNum();
//First store comparison
fprintf(outFile, "%d r%d := r%d = r%d\n", currObj, compReg, powerReg, regZero);
currObj = getObjCount();
fprintf(outFile, "%d pc := %d if r%d\n", currObj, currObj + 7, compReg);
//Output mult for negative exponents
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d * %s\n", currObj, result_reg, result_reg, baseRef);
//Output exponent increment
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d + r%d\n", currObj, powerReg, powerReg, regOne);
//Output jump if power is less than zero
currObj = getObjCount();
compReg = getRegNum();
//First Store Comparison
fprintf(outFile, "%d r%d := r%d < r%d\n", currObj, compReg, powerReg, regZero);
currObj = getObjCount();
fprintf(outFile, "%d pc := %d if r%d\n", currObj, currObj - 3, compReg);
//Output division of result for negative exponents
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d / r%d\n", currObj, result_reg, regOne, result_reg);
//Output leave expression
currObj = getObjCount();
fprintf(outFile, "%d pc := %d\n", currObj, currObj + 2);
//Output setting result to 1 when exponent is 0
currObj = getObjCount();
fprintf(outFile, "%d r%d := r%d\n", currObj, result_reg, regOne);
return multRes;
}