xenia/fox32asm
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Merge pull request #9 from neuschaefer/dev

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Better error handling and nop.8
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Ry 2023-02-01 14:53:42 -08:00 committed by GitHub
commit def2b4fb92
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2 changed files with 32 additions and 16 deletions
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2
src/fox32.pest
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@ -80,7 +80,7 @@ instruction = {
}
instruction_conditional = {
instruction_zero |
instruction_zero ~ size? |
instruction_one ~ size? ~ operand |
instruction_two ~ size? ~ operand ~ "," ~ operand
}

46
src/main.rs
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@ -244,6 +244,7 @@ enum LabelKind {
#[derive(PartialEq, Debug, Clone)]
enum AstNode {
OperationZero {
size: Size,
condition: Condition,
instruction: InstructionZero,
},
@ -351,13 +352,19 @@ fn main() {
}
println!("Parsing file...");
let ast = parse(&input_file);
let ast = match parse(&input_file) {
Ok(x) => x,
Err(x) => {
print!("{:#?}\n", x);
std::process::exit(1);
},
};
let mut instructions: Vec<AssembledInstruction> = Vec::new();
let mut current_address: u32 = 0;
println!("Assembling...");
for node in ast.unwrap() {
for node in ast {
if let AstNode::LabelDefine {name, ..} = node {
let mut address_table = LABEL_ADDRESSES.lock().unwrap();
if let Some(_) = address_table.get(&name) {
@ -525,7 +532,7 @@ fn include_binary_file(pair: pest::iterators::Pair<Rule>) -> AstNode {
fn parse(source: &str) -> Result<Vec<AstNode>, Error<Rule>> {
let mut ast = vec![];
let pairs = Fox32Parser::parse(Rule::assembly, source).expect("parse was unsuccessful");
let pairs = Fox32Parser::parse(Rule::assembly, source)?;
for pair in pairs.peek().unwrap().into_inner() {
match pair.as_rule() {
@ -723,7 +730,15 @@ fn parse_instruction(pair: pest::iterators::Pair<Rule>) -> AstNode {
let mut inner_pair = pair.into_inner();
let instruction_conditional_pair = inner_pair.next().unwrap();
match instruction_conditional_pair.as_rule() {
Rule::instruction_zero => parse_instruction_zero(instruction_conditional_pair, condition),
Rule::instruction_zero => {
if let Some(inner) = inner_pair.peek() {
if inner.as_rule() == Rule::size {
size = parse_size(&inner_pair.next().unwrap());
}
}
*CURRENT_SIZE.lock().unwrap() = size;
parse_instruction_zero(instruction_conditional_pair, size, condition)
}
Rule::instruction_one => {
if inner_pair.peek().unwrap().as_rule() == Rule::size {
size = parse_size(&inner_pair.next().unwrap());
@ -853,8 +868,9 @@ fn parse_operand(mut pair: pest::iterators::Pair<Rule>, is_pointer: bool) -> Ast
}
}
fn parse_instruction_zero(pair: pest::iterators::Pair<Rule>, condition: Condition) -> AstNode {
fn parse_instruction_zero(pair: pest::iterators::Pair<Rule>, size: Size, condition: Condition) -> AstNode {
AstNode::OperationZero {
size: size,
condition: condition,
instruction: match pair.as_str() {
"nop" => InstructionZero::Nop,
@ -1038,17 +1054,17 @@ fn size_to_byte(size: &Size) -> u8 {
fn instruction_to_byte(node: &AstNode) -> u8 {
match node {
AstNode::OperationZero {instruction, ..} => {
AstNode::OperationZero {size, instruction, ..} => {
match instruction {
InstructionZero::Nop => 0x00 | size_to_byte(&Size::Word),
InstructionZero::Halt => 0x10 | size_to_byte(&Size::Word),
InstructionZero::Brk => 0x20 | size_to_byte(&Size::Word),
InstructionZero::Ret => 0x2A | size_to_byte(&Size::Word),
InstructionZero::Reti => 0x3A | size_to_byte(&Size::Word),
InstructionZero::Ise => 0x0C | size_to_byte(&Size::Word),
InstructionZero::Icl => 0x1C | size_to_byte(&Size::Word),
InstructionZero::Mse => 0x0D | size_to_byte(&Size::Word),
InstructionZero::Mcl => 0x1D | size_to_byte(&Size::Word),
InstructionZero::Nop => 0x00 | size_to_byte(size),
InstructionZero::Halt => 0x10 | size_to_byte(size),
InstructionZero::Brk => 0x20 | size_to_byte(size),
InstructionZero::Ret => 0x2A | size_to_byte(size),
InstructionZero::Reti => 0x3A | size_to_byte(size),
InstructionZero::Ise => 0x0C | size_to_byte(size),
InstructionZero::Icl => 0x1C | size_to_byte(size),
InstructionZero::Mse => 0x0D | size_to_byte(size),
InstructionZero::Mcl => 0x1D | size_to_byte(size),
}
}
AstNode::OperationOne {size, instruction, ..} => {