mirror of
https://github.com/azur1s/bobbylisp.git
synced 2024-09-28 07:17:41 +00:00
refactor: more simpler instructions
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parent
65e7ca560f
commit
9699e4a270
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@ -1 +1 @@
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(print "Hello, World!")
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(print "Hello, World")
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192
src/compile.rs
192
src/compile.rs
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@ -2,150 +2,170 @@ use std::fmt::Display;
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use crate::parser::Sexpr::{self, *};
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#[derive(Clone, Debug, Copy)]
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pub struct Register { value: i64 }
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impl Display for Register {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "{}", self.value)
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}
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}
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/// Literal types for the bytecode.
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/// Literal types for the assembler.
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#[derive(Clone, Debug)]
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pub enum Type {
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Int(i64),
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Float(f64),
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Bool(bool),
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Boolean(bool),
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String(String),
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}
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impl Display for Type {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self {
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Type::Int(i) => write!(f, "{}", i),
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Type::Float(fl) => write!(f, "{}", fl),
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Type::Bool(b) => write!(f, "{}", b),
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Type::String(s) => write!(f, "{}", s),
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Type::Int(i) => write!(f, "${}", i),
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Type::Float(fl) => write!(f, "${}", fl),
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Type::Boolean(b) => write!(f, "${}", b),
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Type::String(s) => write!(f, "$\"{}\"", s),
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}
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}
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}
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/// Instructions for the bytecode.
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#[derive(Clone, Copy, Debug)]
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pub struct Register { pub value: usize }
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impl Display for Register {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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write!(f, "r{}", self.value)
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}
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}
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/// Instructions for the assembler.
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#[derive(Clone, Debug)]
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pub enum Instr {
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/// Call(Function Index, Arguments)
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Call(usize, [Register; 6]),
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/// Stack manipulators
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Push(usize, Type), Pop(usize, Register),
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JumpIfFalse(usize, Register, usize),
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// Load a literal value onto the stack;
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Load { address: Register },
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// Store a literal value into a register.
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Store { address: Register, value: Type, },
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// Call intrinsic function.
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Call { address: Register, args: Register },
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// Stack arithmetic.
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Add, Sub, Mul, Div,
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// Immediate arithmetic.
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IAdd { lhs: Register, rhs: Register, to: Register, },
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ISub { lhs: Register, rhs: Register, to: Register, },
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IMul { lhs: Register, rhs: Register, to: Register, },
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IDiv { lhs: Register, rhs: Register, to: Register, },
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}
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impl Display for Instr {
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fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
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match self {
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Instr::Call(idx, args) => write!(f, "{} call {} {} {} {} {} {}", idx, args[0], args[1], args[2], args[3], args[4], args[5]),
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Instr::Push(idx, t) => write!(f, "{} push {}", idx, t),
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Instr::Pop(idx, r) => write!(f, "{} pop {}", idx, r),
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Instr::JumpIfFalse(idx, r, to) => write!(f, "{} jmpf {} {}", idx, r, to),
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Instr::Load { address } => write!(f, "load {}", address),
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Instr::Store { address, value } => write!(f, "store {} {}", address, value),
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Instr::Call { address, args } => write!(f, "call {} {}", address, args),
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Instr::Add => write!(f, "add"),
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Instr::Sub => write!(f, "sub"),
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Instr::Mul => write!(f, "mul"),
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Instr::Div => write!(f, "div"),
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Instr::IAdd { lhs, rhs, to } => write!(f, "iadd {} {} {}", lhs, rhs, to),
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Instr::ISub { lhs, rhs, to } => write!(f, "isub {} {} {}", lhs, rhs, to),
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Instr::IMul { lhs, rhs, to } => write!(f, "imul {} {} {}", lhs, rhs, to),
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Instr::IDiv { lhs, rhs, to } => write!(f, "idiv {} {} {}", lhs, rhs, to),
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}
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}
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}
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pub struct Compiler {
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/// The bytecode.
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pub bytecode: Vec<Instr>,
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/// The stack.
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pub stack: Vec<Type>,
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/// The current register index.
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pub register: Register,
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/// The current label index.
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pub label: usize,
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pub instructions: Vec<Instr>,
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pub register_pointer: usize,
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}
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impl Compiler {
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pub fn new() -> Compiler {
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Compiler {
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bytecode: Vec::new(),
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stack: Vec::new(),
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register: Register { value: 1 },
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label: 0,
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instructions: Vec::new(),
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register_pointer: 1,
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}
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}
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fn next_register(&mut self) -> Register {
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let r = self.register;
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self.register.value += 1;
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let r = Register { value: self.register_pointer };
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self.register_pointer += 1;
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r
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}
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fn next_label(&mut self) -> usize {
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let l = self.label;
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self.label += 1;
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l
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fn current_pointer(&self) -> Register {
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Register { value: self.register_pointer - 1 }
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}
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pub fn compile_sexpr(&mut self, ast: Sexpr) -> Vec<Instr> {
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let mut result: Vec<Instr> = Vec::new();
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pub fn compile(&mut self, ast: Sexpr) -> Result<Vec<Instr>, String> {
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let mut result = Vec::new();
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match ast {
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Cons(car, cdr) => {
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match *car {
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Symbol(f) => {
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match f.as_str() {
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Symbol(ref s) => {
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match s.as_str() {
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"do" => {
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for c in cdr {
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result.append(&mut self.compile_sexpr(c));
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result.append(&mut self.compile(c)?);
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}
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}
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},
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"print" => {
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let function_register = self.next_register();
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result.push(Instr::Push(self.next_label(), Type::Int(1)));
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result.push(Instr::Pop(self.next_label(), function_register));
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let mut arg = self.compile_atom(&cdr[0])?;
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result.append(&mut arg);
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let arg_pointer = self.current_pointer();
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let arg = &cdr[0];
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let instrs = &mut self.compile_ast(arg);
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result.append(&mut instrs.clone());
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let call_register = self.next_register();
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result.push(Instr::Store {
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address: call_register,
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value: Type::Int(1),
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});
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let arg_register = match instrs.last().unwrap() {
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Instr::Pop(_, r) => *r,
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_ => panic!("Expected mov instruction in `print`"),
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};
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result.push(
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Instr::Call(self.next_label(), [
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function_register,
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arg_register,
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Register { value: 0 },
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Register { value: 0 },
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Register { value: 0 },
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Register { value: 0 }
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])
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);
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result.push(Instr::Call {
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address: call_register,
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args: arg_pointer,
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});
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},
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_ => todo!(),
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_ => return Err(format!("Unknown symbol: {}", s)),
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}
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},
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_ => todo!(),
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}
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},
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_ => todo!()
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_ => return Err(format!("Expected symbol, got {:?}", car)),
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}
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}
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_ => { dbg!(ast); unimplemented!() }
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}
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result
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Ok(result)
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}
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fn compile_ast(&mut self, ast: &Sexpr) -> Vec<Instr> {
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fn compile_atom(&mut self, atom: &Sexpr) -> Result<Vec<Instr>, String> {
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let mut result = Vec::new();
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match ast {
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Str(s) => {
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result.push(Instr::Push(self.next_label(), Type::String(format!("\"{}\"", s))));
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result.push(Instr::Pop(self.next_label(), self.next_register()));
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},
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_ => todo!()
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match atom {
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Int(i) => {
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let r = self.next_register();
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result.push(Instr::Store {
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address: r,
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value: Type::Int(*i),
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});
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}
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result
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Float(f) => {
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let r = self.next_register();
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result.push(Instr::Store {
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address: r,
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value: Type::Float(*f),
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});
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}
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Boolean(b) => {
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let r = self.next_register();
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result.push(Instr::Store {
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address: r,
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value: Type::Boolean(*b),
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});
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}
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Str(s) => {
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let r = self.next_register();
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result.push(Instr::Store {
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address: r,
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value: Type::String(s.to_string()),
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});
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}
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_ => return Err(format!("Expected atom, got {:?}", atom)),
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}
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Ok(result)
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}
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}
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@ -26,12 +26,11 @@ fn main() {
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match args.verbose {
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0 => {
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let mut compiler = Compiler::new();
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let instrs = compiler.compile_sexpr(result.unwrap());
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let mut file = File::create(format!("{}.bbb", file_name)).unwrap();
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for instr in instrs {
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file.write_all(format!("{}\n", instr).as_bytes()).unwrap();
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let mut compiler = Compiler::new();
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for instr in compiler.compile(result.unwrap()).unwrap() {
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write!(file, "{}\n", instr).unwrap();
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}
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},
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1 => println!("{:?}", result),
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