glm94/assm-test
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Fixed a bug with the parse discarding identifier tokens when parsing a COPY instruction. Added the first batch of code to encode the final token array to a binary form.

Browse Source
This commit is contained in:
glm94
2023-06-22 20:22:20 -05:00
parent 6741dde7ce
commit 980b0449fc
2 changed files with 173 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/main.c
+160 -11
View File
@@ -11,7 +11,9 @@
List* LIST;
SymbolTable* Symbols;
unsigned char mem[128] = {0};
void print(void);
void assemble(void);
int main(int argc, char* args[]) {
if (argc == 1) {
@@ -33,18 +35,17 @@ int main(int argc, char* args[]) {
Symbols = state->SymbolsTable;
free(source_code);
assemble();
printf("\nBytes:\n");
for(int i = 0; i < sizeof(mem); i++) {
if (i != 0 && i % 8 == 0) printf("\n");
printf("%02X ", mem[i] & 0xFF);
}
printf("\n");
}
// void assemble() {
// for(int i = 0; i < LIST->size; i++) {
// Token* current = LIST->content[i];
// if (current->Class != MnemonicClass) continue;
// }
// }
void print(void) {
char mnemonic[12];
printf("printing tokens...\n");
@@ -103,4 +104,152 @@ void print(void) {
printf("[C]'%s'", t->Lemexe);
}
}
}
}
int CurrentIndex = 0;
int PC2 = 0;
void WriteByte(unsigned char byte) {
mem[PC2] = byte;
PC2++;
}
void WriteWord(unsigned short word) {
mem[PC2] = word;
}
unsigned short GetValueFromToken(Token* token) {
if (token->Class & IdentifierClass) {
Symbol* symbol;
if (TryGetSymbol(token->Lemexe, Symbols, &symbol)) {
printf("Returning %d for address of %s.\n", symbol->Address, symbol->Name);
return symbol->Address;
}
else {
fprintf(stderr, "Failed to find symbol %s while assembling.\n", token->Lemexe);
exit(1);
}
}
else if (token->Class == NumberClass) return token->Value.Number;
fprintf(stderr, "Failed to find token '%d' while assmbling.\n", token->Class);
exit(1);
}
int IsAtEnd(void){
return CurrentIndex >= LIST->size;
}
void assemble() {
while(!IsAtEnd()) {
Token* current = LIST->content[CurrentIndex];
switch(current->Value.Mnemonic) {
case COPYA:
case COPYAB:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
break;
case COPYRA:
case COPYRAB:
case COPYRARA:
case COPYRARAB:
case COPY:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteByte(((Token*) LIST->content[CurrentIndex])->Value.Register);
break;
case COPYI: //TODO: should explicitly get number from value I feel
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
break;
case COPYB:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteWord((unsigned char)GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 1;
break;
case CMP:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteByte(((Token*) LIST->content[CurrentIndex])->Value.Register);
break;
case CMPI:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
break;
case ADD:
case SUB:
case AND:
case OR:
case XOR:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteByte(((Token*) LIST->content[CurrentIndex])->Value.Register);
break;
case SHL:
case SHR:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
break;
case INC:
case DEC:
case PUSH:
case POP:
case JMPI:
CurrentIndex++;
WriteByte(current->Value.Mnemonic | ((Token*) LIST->content[CurrentIndex])->Value.Register);
break;
case JMP:
case JZ:
case JG:
case JL:
WriteByte(current->Value.Mnemonic);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
break;
case NOP:
case RET:
WriteByte(current->Value.Mnemonic);
break;
case CALL:
WriteByte(current->Value.Mnemonic);
CurrentIndex++;
WriteWord(GetValueFromToken(LIST->content[CurrentIndex]));
PC2 += 2;
default:
break;
}
CurrentIndex++;
}
}
src/parser.c
+13 -13
View File
@@ -148,7 +148,7 @@ void HandleOpcode(void) {
if (arg->Class == RegisterClass) {
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
ExpectPuncuation(Comma, RemoveExpected);
arg = PeekToken();
@@ -182,11 +182,11 @@ void HandleOpcode(void) {
ExpectIdentifier(0, ForwardParser);
}
else {
ExpectPuncuation(LBracket, ForwardParser);
ExpectPuncuation(LBracket, RemoveExpected);
ExpectRegister();
ExpectPuncuation(RBracket, ForwardParser);
ExpectPuncuation(RBracket, RemoveExpected);
opcode->Value.Mnemonic = isByte ? COPYRAB : COPYRA;
opcode->Lemexe = isByte ? "copyrab" : "copyra";
@@ -194,19 +194,19 @@ void HandleOpcode(void) {
}
}
else {
ExpectPuncuation(LBracket, ForwardParser);
ExpectPuncuation(LBracket, RemoveExpected);
ExpectRegister();
ExpectPuncuation(RBracket, ForwardParser);
ExpectPuncuation(RBracket, RemoveExpected);
ExpectPuncuation(Comma, ForwardParser);
ExpectPuncuation(Comma, RemoveExpected);
ExpectPuncuation(LBracket, ForwardParser);
ExpectPuncuation(LBracket, RemoveExpected);
ExpectRegister();
ExpectPuncuation(RBracket, ForwardParser);
ExpectPuncuation(RBracket, RemoveExpected);
opcode->Value.Mnemonic = isByte ? COPYRARAB : COPYRARA;
opcode->Lemexe = isByte ? "copyrarab" : "copyrara";
@@ -219,7 +219,7 @@ void HandleOpcode(void) {
{
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
ExpectPuncuation(Comma, RemoveExpected);
TokenClass class = PeekToken()->Class;
@@ -257,7 +257,7 @@ void HandleOpcode(void) {
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
ExpectPuncuation(Comma, RemoveExpected);
ExpectRegister();
@@ -268,7 +268,7 @@ void HandleOpcode(void) {
PC++;
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
ExpectPuncuation(Comma, RemoveExpected);
if (PeekToken()->Class != NumberClass) {
fprintf(stderr, "[Line %d] Syntax error, expected numeric literal.\n", PeekToken()->LineNumber);
@@ -303,11 +303,11 @@ void HandleOpcode(void) {
}
else
{
ExpectPuncuation(LBracket, ForwardParser);
ExpectPuncuation(LBracket, RemoveExpected);
ExpectRegister();
ExpectPuncuation(RBracket, ForwardParser);
ExpectPuncuation(RBracket, RemoveExpected);
opcode->Value.Mnemonic = JMPI;
opcode->Lemexe = "jmpi";