Function cmd_run

src/cli/main.rs:337–364

(args: &Args)

        let asm_text = pipeline.compile_ir_to_assembly(&result.ir_program);
        write_or_print(args.output.as_deref(), &asm_text)?;
    }

    Ok(ExitCode::SUCCESS)
}

// --- run ---

fn cmd_run(args: &Args) -> Result<ExitCode, CliError> {
    let input = require_single_input(args)?;

    let assembled = if has_extension(input, "s") {
        eprintln!(
            "fsc: note: loading `.s` as assembly text; \
             instructions not in the built-in parser may be silently skipped"
        );
        assemble_from_s_file(input, args.mode)?
    } else {
        return run_cli_config(input, args.mode, args.max_steps);
    };

    let mut vm = VirtualMachine::new(&assembled);
    let result = vm.run(args.max_steps);

    print!("{}", result.uart_output);

    match result.outcome {
        StepOutcome::Halted(code) => {
            eprintln!("fsc: program exited with code {code}");
            Ok(ExitCode::from((code & 0xFF) as u8))
        }
        StepOutcome::Continue => Err(CliError::Timeout(args.max_steps)),