爱特每羊队
61 lines
1.8 KiB
Rust
61 lines
1.8 KiB
Rust
use std::fmt;
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use crate::opcode::{self, OpCode};
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#[derive(Debug, Clone, PartialEq)]
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pub enum Constant {
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Number(f64),
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Int(i32),
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String(String),
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Boolean(bool),
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Null,
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Undefined,
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}
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pub struct CompiledModule {
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pub bytecode: Vec<opcode::Instr>,
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pub constants: Vec<Constant>,
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pub n_registers: u8,
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}
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impl fmt::Display for CompiledModule {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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writeln!(f, "; n_registers = {}", self.n_registers)?;
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writeln!(f, "; constants:")?;
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for (i, c) in self.constants.iter().enumerate() {
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writeln!(f, "; [{i}] = {:?}", c)?;
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}
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writeln!(f)?;
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for (offset, &instr) in self.bytecode.iter().enumerate() {
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let op = opcode::opcode(instr);
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let rd = opcode::rd(instr);
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let a = opcode::a(instr);
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let b = opcode::b(instr);
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write!(f, " {offset:04} {op}")?;
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match op {
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OpCode::LOAD_CONST => {
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write!(f, " r{rd}, const[{}]", opcode::imm16(instr))?;
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}
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OpCode::JMP | OpCode::JMP_IF_FALSE | OpCode::JMP_IF_TRUE => {
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write!(f, " r{rd}, {offset:+}", offset = opcode::offset16(instr))?;
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}
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OpCode::SWITCH_TABLE => {
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let n_cases = rd as u16 | ((b as u16) << 8);
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write!(f, " r{disc_reg}={a}, {n_cases} cases", disc_reg = a)?;
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}
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OpCode::RETURN | OpCode::HALT | OpCode::NOP => {
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write!(f, " r{rd}")?;
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}
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OpCode::NEG => {
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write!(f, " r{rd}, r{a}")?;
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}
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_ => {
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write!(f, " r{rd}, r{a}, r{b}")?;
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}
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}
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writeln!(f)?;
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}
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Ok(())
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}
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}
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