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version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "32a4622180e7a0ec044bb555404c800bc9fd9ec262ec147edd5989ccd0c02cd3"
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"
|
||||
|
||||
[[package]]
|
||||
name = "x11-dl"
|
||||
version = "2.21.0"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "38735924fedd5314a6e548792904ed8c6de6636285cb9fec04d5b1db85c1516f"
|
||||
dependencies = [
|
||||
"libc",
|
||||
"once_cell",
|
||||
"pkg-config",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "xcursor"
|
||||
version = "0.3.8"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "0ef33da6b1660b4ddbfb3aef0ade110c8b8a781a3b6382fa5f2b5b040fd55f61"
|
||||
|
||||
[[package]]
|
||||
name = "xml-rs"
|
||||
version = "0.8.23"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "af310deaae937e48a26602b730250b4949e125f468f11e6990be3e5304ddd96f"
|
||||
13
Cargo.toml
Normal file
13
Cargo.toml
Normal file
@ -0,0 +1,13 @@
|
||||
[package]
|
||||
name = "svc16"
|
||||
version = "0.1.0"
|
||||
edition = "2021"
|
||||
authors = ["Jan Neuendorf"]
|
||||
description = "An emulator for a simple virtual computer"
|
||||
license="MIT"
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.93"
|
||||
clap = { version = "4.5.21", features = ["derive"] }
|
||||
minifb = "0.27.0"
|
||||
thiserror = "2.0.3"
|
||||
34
src/cli.rs
Normal file
34
src/cli.rs
Normal file
@ -0,0 +1,34 @@
|
||||
use clap::Parser;
|
||||
|
||||
#[derive(Parser, Debug)]
|
||||
#[command(author, version, about, long_about = None)]
|
||||
pub struct Cli {
|
||||
pub program: String,
|
||||
|
||||
#[arg(short, long, default_value = "1", help = "Set the window scaling")]
|
||||
pub scaling: usize,
|
||||
|
||||
#[arg(
|
||||
short,
|
||||
long,
|
||||
default_value = "3000000",
|
||||
help = "Set the maximum instructions per frame"
|
||||
)]
|
||||
pub max_ipf: usize,
|
||||
|
||||
#[arg(
|
||||
short,
|
||||
long,
|
||||
default_value_t = false,
|
||||
help = "Output performance metrics"
|
||||
)]
|
||||
pub verbose: bool,
|
||||
#[arg(
|
||||
short,
|
||||
long,
|
||||
help = "Output instructions and value at the given address"
|
||||
)]
|
||||
pub debug: Option<Vec<u16>>,
|
||||
#[arg(short, long, help = "Show cursor on window")]
|
||||
pub cursor: bool,
|
||||
}
|
||||
196
src/engine.rs
Normal file
196
src/engine.rs
Normal file
@ -0,0 +1,196 @@
|
||||
use std::ops::{BitAnd, BitXor};
|
||||
use thiserror::Error;
|
||||
|
||||
const MEMSIZE: usize = u16::MAX as usize + 1;
|
||||
|
||||
const SET: u16 = 0;
|
||||
const GOTO: u16 = 1;
|
||||
const SKIP: u16 = 2;
|
||||
const ADD: u16 = 3;
|
||||
const SUB: u16 = 4;
|
||||
const MUL: u16 = 5;
|
||||
const DIV: u16 = 6;
|
||||
const CMP: u16 = 7;
|
||||
const DEREF: u16 = 8;
|
||||
const REF: u16 = 9;
|
||||
const INST: u16 = 10;
|
||||
const PRINT: u16 = 11;
|
||||
const READ: u16 = 12;
|
||||
const BAND: u16 = 13;
|
||||
const XOR: u16 = 14;
|
||||
const SYNC: u16 = 15;
|
||||
|
||||
pub struct Engine {
|
||||
memory: [u16; MEMSIZE],
|
||||
screen: [u16; MEMSIZE],
|
||||
instruction_pointer: u16,
|
||||
pos_code: u16,
|
||||
key_code: u16,
|
||||
sync_called: bool,
|
||||
}
|
||||
|
||||
#[derive(Debug, Error)]
|
||||
pub enum EngineError {
|
||||
#[error("Division by zero")]
|
||||
ZeroDivision,
|
||||
|
||||
#[error("Invalid instruction")]
|
||||
InvalidInstruction,
|
||||
}
|
||||
|
||||
impl Engine {
|
||||
pub fn new<T>(state: T) -> Self
|
||||
where
|
||||
T: IntoIterator<Item = u16>,
|
||||
{
|
||||
let mut iter = state.into_iter();
|
||||
let mut memory = [0_u16; MEMSIZE];
|
||||
for i in 0..MEMSIZE {
|
||||
match iter.next() {
|
||||
Some(val) => {
|
||||
memory[i] = val;
|
||||
}
|
||||
_ => {
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
Self {
|
||||
memory,
|
||||
screen: [0; MEMSIZE],
|
||||
instruction_pointer: 0,
|
||||
pos_code: 0,
|
||||
key_code: 0,
|
||||
sync_called: false,
|
||||
}
|
||||
}
|
||||
pub fn wants_to_sync(&self) -> bool {
|
||||
return self.sync_called;
|
||||
}
|
||||
pub fn get_instruction_pointer(&self) -> u16 {
|
||||
self.instruction_pointer
|
||||
}
|
||||
pub fn set_input(&mut self, pos_code: u16, key_code: u16) {
|
||||
self.pos_code = pos_code;
|
||||
self.key_code = key_code;
|
||||
}
|
||||
pub fn perform_sync(&mut self, pos_code: u16, key_code: u16) -> [u16; MEMSIZE] {
|
||||
self.set_input(pos_code, key_code);
|
||||
self.sync_called = false;
|
||||
return self.screen.clone();
|
||||
}
|
||||
}
|
||||
impl Engine {
|
||||
pub fn get(&self, index: u16) -> u16 {
|
||||
return self.memory[index as usize];
|
||||
}
|
||||
fn set(&mut self, index: u16, value: u16) {
|
||||
self.memory[index as usize] = value;
|
||||
}
|
||||
fn get_screen(&self, index: u16) -> u16 {
|
||||
return self.screen[index as usize];
|
||||
}
|
||||
fn set_screen(&mut self, index: u16, value: u16) {
|
||||
self.screen[index as usize] = value;
|
||||
}
|
||||
pub fn read_instruction(&self) -> [u16; 4] {
|
||||
return [0, 1, 2, 3].map(|o| self.get(self.instruction_pointer.wrapping_add(o)));
|
||||
}
|
||||
fn advance_inst_ptr(&mut self) {
|
||||
self.instruction_pointer = self.instruction_pointer.wrapping_add(4);
|
||||
}
|
||||
pub fn step(&mut self) -> Result<(), EngineError> {
|
||||
let [opcode, arg1, arg2, arg3] = self.read_instruction();
|
||||
match opcode {
|
||||
SET => {
|
||||
self.set(arg1, arg2);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
GOTO => {
|
||||
if self.get(arg3) == 0 {
|
||||
self.instruction_pointer = self.get(arg1).wrapping_add(arg2);
|
||||
} else {
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
}
|
||||
SKIP => {
|
||||
if self.get(arg3) == 0 {
|
||||
self.instruction_pointer = self
|
||||
.instruction_pointer
|
||||
.wrapping_add(arg1.wrapping_mul(4).wrapping_sub(arg2.wrapping_mul(4)));
|
||||
} else {
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
}
|
||||
ADD => {
|
||||
self.set(arg3, self.get(arg1).wrapping_add(self.get(arg2)));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
SUB => {
|
||||
self.set(arg3, self.get(arg1).wrapping_sub(self.get(arg2)));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
MUL => {
|
||||
self.set(arg3, self.get(arg1).wrapping_mul(self.get(arg2)));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
DIV => {
|
||||
if self.get(arg2) == 0 {
|
||||
return Err(EngineError::ZeroDivision);
|
||||
} else {
|
||||
self.set(arg3, self.get(arg1).wrapping_div(self.get(arg2)));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
}
|
||||
CMP => {
|
||||
if self.get(arg1) < self.get(arg2) {
|
||||
self.set(arg3, 1);
|
||||
} else {
|
||||
self.set(arg3, 0);
|
||||
}
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
DEREF => {
|
||||
let value = self.get(self.get(arg1) + arg3);
|
||||
self.set(arg2, value);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
REF => {
|
||||
let value = self.get(arg2);
|
||||
self.set(self.get(arg1) + arg3, value);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
INST => {
|
||||
let value = self.instruction_pointer;
|
||||
self.set(arg1, value);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
PRINT => {
|
||||
self.set_screen(self.get(arg2), self.get(arg1));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
READ => {
|
||||
self.set(arg2, self.get_screen(self.get(arg1)));
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
BAND => {
|
||||
let band = self.get(arg1).bitand(self.get(arg2));
|
||||
self.set(arg3, band);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
XOR => {
|
||||
let xor = self.get(arg1).bitxor(self.get(arg2));
|
||||
self.set(arg3, xor);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
SYNC => {
|
||||
self.sync_called = true;
|
||||
self.set(arg1, self.pos_code);
|
||||
self.set(arg2, self.key_code);
|
||||
self.advance_inst_ptr();
|
||||
}
|
||||
_ => return Err(EngineError::InvalidInstruction),
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
}
|
||||
120
src/main.rs
Normal file
120
src/main.rs
Normal file
@ -0,0 +1,120 @@
|
||||
mod cli;
|
||||
mod engine;
|
||||
|
||||
use anyhow::{anyhow, Result};
|
||||
use clap::Parser;
|
||||
use cli::Cli;
|
||||
use engine::Engine;
|
||||
use minifb::{Key, Scale, Window, WindowOptions};
|
||||
use std::time::Instant;
|
||||
const RES: usize = 256;
|
||||
|
||||
fn main() -> Result<()> {
|
||||
let cli = Cli::parse();
|
||||
let initial_state = read_u16s_from_file(&cli.program)?;
|
||||
let mut engine = Engine::new(initial_state);
|
||||
let mut options = WindowOptions::default();
|
||||
|
||||
options.scale = match cli.scaling {
|
||||
1 => Scale::X1,
|
||||
2 => Scale::X2,
|
||||
4 => Scale::X4,
|
||||
8 => Scale::X8,
|
||||
16 => Scale::X16,
|
||||
_ => return Err(anyhow!("Scaling must be 1,2,4,8 or 16")),
|
||||
};
|
||||
|
||||
let mut image_buffer = vec![0_u32; RES * RES];
|
||||
let mut window = Window::new("SVC16", RES, RES, options)?;
|
||||
window.set_target_fps(30);
|
||||
window.set_cursor_visibility(cli.cursor);
|
||||
while window.is_open() && !window.is_key_down(Key::Escape) {
|
||||
let mut ipf = 0_usize;
|
||||
let start = Instant::now();
|
||||
while !engine.wants_to_sync() {
|
||||
if let Some(debug_vals) = &cli.debug {
|
||||
print_debug_info(debug_vals, &engine);
|
||||
}
|
||||
engine.step()?;
|
||||
ipf += 1;
|
||||
if ipf >= cli.max_ipf {
|
||||
break;
|
||||
}
|
||||
}
|
||||
let frametime = start.elapsed();
|
||||
let input_code = get_input_code(&window);
|
||||
let screenview = engine.perform_sync(input_code.0, input_code.1);
|
||||
update_image_buffer(&mut image_buffer, &screenview);
|
||||
window.update_with_buffer(&image_buffer, RES, RES)?;
|
||||
if cli.verbose {
|
||||
println!(
|
||||
"frame needed {} instructions ({}ms)",
|
||||
ipf,
|
||||
frametime.as_millis()
|
||||
);
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fn read_u16s_from_file(file_path: &str) -> Result<Vec<u16>> {
|
||||
use std::io::{BufReader, Read};
|
||||
let file = std::fs::File::open(file_path)?;
|
||||
let mut reader = BufReader::new(file);
|
||||
let mut buffer = [0u8; 2];
|
||||
let mut u16s = Vec::new();
|
||||
while reader.read_exact(&mut buffer).is_ok() {
|
||||
let value = u16::from_le_bytes(buffer);
|
||||
u16s.push(value);
|
||||
}
|
||||
Ok(u16s)
|
||||
}
|
||||
|
||||
fn rgb565_to_argb(rgb565: u16) -> u32 {
|
||||
let r = ((rgb565 >> 11) & 0x1F) as u8;
|
||||
let g = ((rgb565 >> 5) & 0x3F) as u8;
|
||||
let b = (rgb565 & 0x1F) as u8;
|
||||
let r = (r << 3) | (r >> 2);
|
||||
let g = (g << 2) | (g >> 4);
|
||||
let b = (b << 3) | (b >> 2);
|
||||
(0xFF << 24) | ((r as u32) << 16) | ((g as u32) << 8) | (b as u32)
|
||||
}
|
||||
|
||||
fn update_image_buffer(imbuff: &mut Vec<u32>, screen: &[u16; RES * RES]) {
|
||||
for i in 0..RES * RES {
|
||||
*imbuff.get_mut(i).expect("Error with image buffer") = rgb565_to_argb(screen[i]);
|
||||
}
|
||||
}
|
||||
|
||||
fn get_input_code(window: &Window) -> (u16, u16) {
|
||||
let mp = window.get_mouse_pos(minifb::MouseMode::Clamp).unwrap();
|
||||
let pos_code = mp.1 as u16 * 256 + mp.0 as u16;
|
||||
let mut key_code = 0_u16;
|
||||
if window.get_mouse_down(minifb::MouseButton::Left) {
|
||||
key_code += 1;
|
||||
}
|
||||
if window.get_mouse_down(minifb::MouseButton::Right) {
|
||||
key_code += 2;
|
||||
}
|
||||
|
||||
(pos_code, key_code)
|
||||
}
|
||||
|
||||
fn print_debug_info(debug_vals: &Vec<u16>, engine: &Engine) {
|
||||
let ptr = engine.get_instruction_pointer();
|
||||
let inst = engine.read_instruction();
|
||||
for d in debug_vals {
|
||||
println!("@{}={}", d, engine.get(*d));
|
||||
}
|
||||
println!(
|
||||
"prt:{}, opcode:{}, args:[{},{},{}], @args:[{},{},{}]",
|
||||
ptr,
|
||||
inst[0],
|
||||
inst[1],
|
||||
inst[2],
|
||||
inst[3],
|
||||
engine.get(inst[1]),
|
||||
engine.get(inst[2]),
|
||||
engine.get(inst[3])
|
||||
);
|
||||
}
|
||||
Loading…
x
Reference in New Issue
Block a user