glm94/assm-test
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Hooked up the program counter in the parser to set the memory offset of symbols, well labels to be more acurrate.

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This commit is contained in:
glm94
2023-06-18 14:51:37 -05:00
parent c6e6e2c5dc
commit 6741dde7ce
4 changed files with 72 additions and 25 deletions
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misc/another_test.asm
+1 -1
View File
@@ -1,6 +1,6 @@
.db MAX_MEM 0xFFFF
.db VIDEO_MEM 0xF37F
;.db MAX_LENGTH MAX_MEM - MAX_LENGTH
.db MAX_LENGTH 32;MAX_MEM - MAX_LENGTH
.db MSG "Hello, World!", 0
_start:
src/main.c
+13 -1
View File
@@ -9,6 +9,7 @@
#include "../includes/parser.h"
List* LIST;
SymbolTable* Symbols;
void print(void);
@@ -27,12 +28,23 @@ int main(int argc, char* args[]) {
LIST = GenerateTokenList(source_code);
ParseTokens(LIST);
IRState* state = ParseTokens(LIST);
Symbols = state->SymbolsTable;
free(source_code);
}
// 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");
src/parser.c
+58 -7
View File
@@ -26,7 +26,7 @@ Symbol* ExpectIdentifier(int resolved, ExpectOptions options);
void ExpectCharacterClass(Symbol* symbol);
void ExpectLineEndOrFileEnd(ExpectOptions options);
int HeapSize = 0;
//int HeapSize = 0;
int PC = 0;
IRState* ParseTokens(List* tokens) {
@@ -58,8 +58,12 @@ IRState* ParseTokens(List* tokens) {
exit(1);
}
if (!found) AddSymbolToTable(t->Lemexe, HeapSize, 1, MachineState.SymbolsTable);
else symbol->Resolved = 1;
if (!found) AddSymbolToTable(t->Lemexe, PC, 1, MachineState.SymbolsTable);
else
{
symbol->Address = PC;
symbol->Resolved = 1;
}
RemoveCurrentToken(); //label
@@ -101,11 +105,12 @@ void HandleAssemblerDirective() {
}
else if (PeekToken()->Class == IdentifierClass) {
symbol = ExpectIdentifier(0, RemoveExpected);
symbol->Length = 2;
ExpectLineEndOrFileEnd(RemoveExpected);
}
HeapSize += symbol->Length;
//HeapSize += symbol->Length;
}
break;
default:
@@ -138,6 +143,8 @@ void HandleOpcode(void) {
arg = PeekToken();
}
PC++;
if (arg->Class == RegisterClass) {
ExpectRegister();
@@ -149,6 +156,8 @@ void HandleOpcode(void) {
opcode->Value.Mnemonic = isByte ? COPYB : COPYI;
opcode->Lemexe = isByte ? "copyb" : "copyi";
isByte ? PC++ : (PC += 2);
AdvanceParser();
}
else if (arg->Class == RegisterClass) {
@@ -162,10 +171,13 @@ void HandleOpcode(void) {
opcode->Value.Mnemonic = COPY;
opcode->Lemexe = "copy";
PC++;
}
else if (arg->Class & IdentifierClass) {
opcode->Value.Mnemonic = isByte ? COPYAB : COPYA;
opcode->Lemexe = isByte ? "copyab" : "copya";
PC += 2;
ExpectIdentifier(0, ForwardParser);
}
@@ -177,7 +189,8 @@ void HandleOpcode(void) {
ExpectPuncuation(RBracket, ForwardParser);
opcode->Value.Mnemonic = isByte ? COPYRAB : COPYRA;
opcode->Lemexe = isByte ? "copyrab" : "copyra";
opcode->Lemexe = isByte ? "copyrab" : "copyra";
PC++;
}
}
else {
@@ -197,6 +210,8 @@ void HandleOpcode(void) {
opcode->Value.Mnemonic = isByte ? COPYRARAB : COPYRARA;
opcode->Lemexe = isByte ? "copyrarab" : "copyrara";
PC++;
}
}
break;
@@ -208,20 +223,28 @@ void HandleOpcode(void) {
TokenClass class = PeekToken()->Class;
PC++;
if (class == NumberClass) {
opcode->Value.Mnemonic = CMPI;
opcode->Lemexe = "CMPI";
AdvanceParser();
PC += 2;
}
else if (class & IdentifierClass) {
opcode->Value.Mnemonic = CMPI;
opcode->Lemexe = "CMPI";
ExpectIdentifier(0, ForwardParser);
PC += 2;
}
else {
ExpectRegister();
PC++;
}
}
break;
@@ -230,14 +253,19 @@ void HandleOpcode(void) {
case AND:
case OR:
case XOR:
PC++;
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
ExpectRegister();
PC++;
break;
case SHL:
case SHR:
PC++;
ExpectRegister();
ExpectPuncuation(Comma, ForwardParser);
@@ -249,15 +277,20 @@ void HandleOpcode(void) {
}
AdvanceParser();
PC += 2;
break;
case INC:
case DEC:
case PUSH:
case POP:
PC++;
ExpectRegister();
break;
case JMP:
{
PC++;
Token* arg = PeekToken();
if (arg->Class & IdentifierClass) {
@@ -265,6 +298,8 @@ void HandleOpcode(void) {
opcode->Value.Mnemonic = JMP;
opcode->Lemexe = "jmp";
PC += 2;
}
else
{
@@ -281,29 +316,44 @@ void HandleOpcode(void) {
break;
case JZ:
{
PC++;
ExpectIdentifier(0, ForwardParser);
PC += 2;
opcode->Value.Mnemonic = JZ;
opcode->Lemexe = "jz";
}
break;
case JG:
{
PC++;
ExpectIdentifier(0, ForwardParser);
PC += 2;
opcode->Value.Mnemonic = JG;
opcode->Lemexe = "jg";
}
break;
case JL:
{
PC++;
ExpectIdentifier(0, ForwardParser);
PC += 2;
opcode->Value.Mnemonic = JL;
opcode->Lemexe = "jl";
}
break;
case CALL:
{
PC++;
Token* arg = PeekToken();
if ((arg->Class & IdentifierClass) == 0) {
@@ -313,6 +363,8 @@ void HandleOpcode(void) {
}
ExpectIdentifier(0, ForwardParser);
PC += 2;
}
break;
default:
@@ -363,11 +415,10 @@ Symbol* ExpectIdentifier(int resolved, ExpectOptions options) {
}
if (found) {
symbol->Address = HeapSize;
symbol->Resolved = resolved || symbol->Resolved;
}
else {
symbol = AddSymbolToTable(token->Lemexe, HeapSize, resolved, MachineState.SymbolsTable);
symbol = AddSymbolToTable(token->Lemexe, PC, resolved, MachineState.SymbolsTable);
}
if (options & RemoveExpected) RemoveCurrentToken();
src/scanner.c
-16
View File
@@ -283,14 +283,6 @@ Token* ParseIdentifier(void) {
return token;
}
// if (strcmp(lexeme, "load") == 0) {
// Token* token = CreateToken(Line, DirectiveClass);
// token->Lemexe = lexeme;
// token->Value.Directive = Load;
// return token;
// }
if (strcmp(lexeme, "byte") == 0) {
Token* token = CreateToken(Line, DirectiveClass);
@@ -299,14 +291,6 @@ Token* ParseIdentifier(void) {
return token;
}
// if (strcmp(lexeme, "store") == 0) {
// Token* token = CreateToken(Line, DirectiveClass);
// token->Lemexe = lexeme;
// token->Value.Directive = Store;
// return token;
// }
Token* token = CreateToken(Line, IdentifierClass);