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/*
Copyright 2021-2023 Gabriel Jensen.
This file is part of Luma.
Luma is free software: you can redistribute it
and/or modify it under the terms of the GNU
Affero General Public License as published by
the Free Software Foundation, either version 3
of the License, or (at your option) any later
version.
Luma is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Affero General Public License for more details.
You should have received a copy of the GNU
Affero General Public License along with Luma.
If not, see <https://www.gnu.org/licenses/>.
*/
use crate::{log, log_status};
use crate::cpu::Cpu;
use crate::cpu_handle::CpuHandle;
use std::sync::atomic::Ordering;
use std::thread::{sleep, spawn};
use std::time::{Duration, Instant};
impl Cpu {
pub fn boot(self) -> CpuHandle {
eprintln!("starting emulation at {:#010X}", self.state.lock().unwrap().read_register(0xF).wrapping_sub(0x8));
let state = self.state.clone();
let dead = self.dead.clone();
let handle = spawn(move || { self.run() });
return CpuHandle::new(
state,
dead,
handle,
);
}
fn run(mut self) {
let run_timer = Instant::now();
'main_loop: loop {
if self.dead.load(Ordering::Relaxed) { break 'main_loop };
let (instruction, predicate, cpsr) = self.fetch();
match predicate.test(cpsr) {
false => log_status!("skipping due to predicate ({})", predicate.code()),
true => self.execute(instruction),
};
self.r#continue();
if cfg!(debug_assertions) { sleep(Duration::from_millis(125)) };
self.cycle += 0x1;
}
let frequency = self.cycle as f64 / run_timer.elapsed().as_micros() as f64;
eprintln!("emulated {} cycle(s) ({frequency:.9} MHz)", self.cycle);
}
}
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