[NO TESTS] WIP
This commit is contained in:
parent
2bc93922bc
commit
8630125e4d
4 changed files with 223 additions and 92 deletions
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@ -1,10 +1,9 @@
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use std::env::args;
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use std::fs::File;
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use std::io;
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use std::io::BufReader;
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use std::io::Read;
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use uxn::Uxn;
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use uxn::vm::Uxn;
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fn main() -> Result<(), std::io::Error> {
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let mut vm = Uxn::new();
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@ -19,8 +19,8 @@ impl Device for SystemDevice {
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fn dei1(&mut self, vm: &mut Uxn, port: u8) -> u8 {
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let slot = port & 0xF;
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match slot {
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0x2 => vm.wst.idx,
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0x3 => vm.rst.idx,
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0x2 => vm.wst.borrow().idx(),
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0x3 => vm.rst.borrow().idx(),
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x => self.buffer[x as usize],
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}
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}
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196
src/stack.rs
196
src/stack.rs
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@ -1,37 +1,66 @@
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use std;
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use std::cell::RefCell;
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use std::rc::Rc;
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use std::result::Result;
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#[derive(Debug)]
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pub struct Stack {
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buff: [u8; 0xFF],
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pub idx: u8,
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}
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pub enum StackError {
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StackOverflow,
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StackUnderflow,
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}
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impl Stack {
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pub fn new() -> Stack {
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Stack {
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buff: [0; 0xFF],
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idx: 0,
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}
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pub trait Stack: std::fmt::Debug {
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fn idx(&self) -> u8;
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fn push1(&mut self, val: u8) -> Result<(), StackError>;
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fn push2(&mut self, val: u16) -> Result<(), StackError>;
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fn get1(&self, idx: u8) -> Result<u8, StackError>;
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fn get2(&self, idx: u8) -> Result<u16, StackError>;
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fn peek1(&self) -> Result<u8, StackError>;
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fn peek2(&self) -> Result<u16, StackError>;
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fn pop1(&mut self) -> Result<u8, StackError>;
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fn pop2(&mut self) -> Result<u16, StackError>;
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fn move1(&mut self, other: &mut dyn Stack) -> Result<(), StackError> {
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other.push1(self.pop1()?)?;
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Ok(())
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}
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pub fn push1(&mut self, val: u8) -> Result<(), StackError> {
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if self.idx == 255 {
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fn move2(&mut self, other: &mut dyn Stack) -> Result<(), StackError> {
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other.push2(self.pop2()?)?;
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Ok(())
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}
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}
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#[derive(Debug)]
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pub struct ArrayStack {
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buff: [u8; 0xFF],
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_idx: u8,
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}
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impl ArrayStack {
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pub fn new() -> ArrayStack {
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ArrayStack {
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buff: [0; 0xFF],
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_idx: 0,
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}
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}
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}
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impl Stack for ArrayStack {
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fn idx(&self) -> u8 {
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return self._idx;
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}
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fn push1(&mut self, val: u8) -> Result<(), StackError> {
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if self._idx == 255 {
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Err(StackError::StackOverflow)
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} else {
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self.buff[self.idx as usize] = val;
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self.idx += 1;
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self.buff[self._idx as usize] = val;
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self._idx += 1;
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Ok(())
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}
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}
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pub fn push2(&mut self, val: u16) -> Result<(), StackError> {
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if self.idx > 254 {
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fn push2(&mut self, val: u16) -> Result<(), StackError> {
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if self._idx > 254 {
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Err(StackError::StackOverflow)
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} else {
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val.to_be_bytes().map(|x| self.push1(x).ok());
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@ -39,133 +68,123 @@ impl Stack {
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}
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}
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pub fn get1(&self, idx: u8) -> Result<u8, StackError> {
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Ok(self.buff[idx as usize])
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fn get1(&self, _idx: u8) -> Result<u8, StackError> {
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Ok(self.buff[_idx as usize])
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}
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pub fn peek1(&self) -> Result<u8, StackError> {
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if self.idx == 0 {
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fn peek1(&self) -> Result<u8, StackError> {
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if self._idx == 0 {
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Err(StackError::StackUnderflow)
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} else {
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Ok(self.get1(self.idx - 1)?)
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Ok(self.get1(self._idx - 1)?)
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}
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}
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pub fn pop1(&mut self) -> Result<u8, StackError> {
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fn pop1(&mut self) -> Result<u8, StackError> {
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let val = self.peek1()?;
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self.idx -= 1;
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self._idx -= 1;
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Ok(val)
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}
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pub fn get2(&self, idx: u8) -> Result<u16, StackError> {
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if idx == 255 {
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fn get2(&self, _idx: u8) -> Result<u16, StackError> {
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if _idx == 255 {
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Err(StackError::StackOverflow)
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} else {
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let high = self.buff[idx as usize] as u16;
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let low = self.buff[(idx + 1) as usize] as u16;
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println!("idx {}; high {:#02x}; low {:#02x};", idx, high, low);
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let high = self.buff[_idx as usize] as u16;
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let low = self.buff[(_idx + 1) as usize] as u16;
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println!("_idx {}; high {:#02x}; low {:#02x};", _idx, high, low);
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Ok((high << 8) + low)
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}
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}
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pub fn peek2(&mut self) -> Result<u16, StackError> {
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if self.idx < 2 {
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fn peek2(&self) -> Result<u16, StackError> {
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if self._idx < 2 {
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Err(StackError::StackUnderflow)
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} else {
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self.get2(self.idx - 2)
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self.get2(self._idx - 2)
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}
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}
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pub fn pop2(&mut self) -> Result<u16, StackError> {
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fn pop2(&mut self) -> Result<u16, StackError> {
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let val = self.peek2()?;
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self.idx -= 2;
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self._idx -= 2;
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Ok(val)
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}
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pub fn move1(&mut self, other: &mut Stack) -> Result<(), StackError> {
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other.push1(self.pop1()?)?;
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Ok(())
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}
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pub fn move2(&mut self, other: &mut Stack) -> Result<(), StackError> {
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other.push2(self.pop2()?)?;
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Ok(())
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}
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}
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#[cfg(test)]
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mod stack_test {
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mod arraystack_test {
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use super::*;
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#[test]
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fn test_push_pop() {
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let mut s = Stack::new();
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let mut s = ArrayStack::new();
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match s.push1(0xFF) {
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Ok(()) => (),
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Err(_) => assert!(false, "pushing stack of size 0 errored"),
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}
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assert_eq!(s.idx, 1);
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assert_eq!(s._idx, 1);
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match s.peek1() {
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Ok(val) => assert_eq!(val, 0xFF),
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Err(_) => assert!(false, "popping stack of size 1 errored"),
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}
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assert_eq!(s.idx, 1);
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assert_eq!(s._idx, 1);
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match s.pop1() {
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Ok(val) => assert_eq!(val, 0xFF),
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Err(_) => assert!(false, "popping stack of size 1 errored"),
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}
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assert_eq!(s.idx, 0);
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assert_eq!(s._idx, 0);
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}
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#[test]
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fn test_push2_pop2() {
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let mut s = Stack::new();
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let mut s = ArrayStack::new();
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match s.push2(0xFF00) {
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Ok(()) => (),
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Err(_) => assert!(false, "pushing stack of size 0 errored"),
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}
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assert_eq!(s.idx, 2);
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assert_eq!(s._idx, 2);
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match s.peek2() {
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Ok(val) => assert_eq!(val, 0xFF00),
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Err(_) => assert!(false, "peek2 stack of size 2 errored"),
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}
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assert_eq!(s.idx, 2);
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assert_eq!(s._idx, 2);
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match s.pop2() {
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Ok(val) => assert_eq!(val, 0xFF00),
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Err(_) => assert!(false, "peek2 stack of size 2 errored"),
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}
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assert_eq!(s.idx, 0);
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assert_eq!(s._idx, 0);
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}
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#[test]
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fn test_push2_pop1_pop1() {
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let mut s = Stack::new();
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let mut s = ArrayStack::new();
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match s.push2(0xFF00) {
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Ok(()) => (),
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Err(_) => assert!(false, "pushing stack of size 0 errored"),
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}
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assert_eq!(s.idx, 2);
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assert_eq!(s._idx, 2);
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match s.pop1() {
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Ok(val) => assert_eq!(val, 0x00),
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Err(_) => assert!(false, "peek1 stack of size 2 errored"),
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}
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assert_eq!(s.idx, 1);
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assert_eq!(s._idx, 1);
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match s.pop1() {
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Ok(val) => assert_eq!(val, 0xFF),
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Err(_) => assert!(false, "peek1 stack of size 2 errored"),
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}
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assert_eq!(s.idx, 0);
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assert_eq!(s._idx, 0);
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}
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#[test]
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fn test_pop_empty() {
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let mut s = Stack::new();
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let mut s = ArrayStack::new();
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match s.pop1() {
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Ok(_) => assert!(false, "popping stack of size 0 succeeded"),
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Err(StackError::StackUnderflow) => (),
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@ -173,3 +192,62 @@ mod stack_test {
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}
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}
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}
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#[derive(Debug)]
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enum StackOp {
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Push1(u8),
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Push2(u16),
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Pop1(),
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Pop2(),
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}
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/**
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* A writeahead log wrapping a read copy of another stack.
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* Can be committed
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*/
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#[derive(Debug)]
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pub struct StackWAL {
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log: Vec<StackOp>,
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_idx: u8,
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wrapped: Rc<RefCell<dyn Stack>>,
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}
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impl StackWAL {
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pub fn new(wrapped: Rc<RefCell<dyn Stack>>) -> StackWAL {
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return StackWAL {
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log: vec![],
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_idx: wrapped.borrow().idx(),
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wrapped: wrapped.clone(),
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};
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}
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}
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impl Stack for StackWAL {
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fn idx(&self) -> u8 {
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return self._idx;
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}
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fn push1(&mut self, val: u8) -> Result<(), StackError> {
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unimplemented!()
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}
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fn push2(&mut self, val: u16) -> Result<(), StackError> {
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unimplemented!()
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}
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fn get1(&self, idx: u8) -> Result<u8, StackError> {
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unimplemented!()
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}
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fn get2(&self, idx: u8) -> Result<u16, StackError> {
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unimplemented!()
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}
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fn peek1(&self) -> Result<u8, StackError> {
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unimplemented!()
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}
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fn peek2(&self) -> Result<u16, StackError> {
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unimplemented!()
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}
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fn pop1(&mut self) -> Result<u8, StackError> {
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unimplemented!()
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}
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fn pop2(&mut self) -> Result<u16, StackError> {
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unimplemented!()
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}
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}
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110
src/vm.rs
110
src/vm.rs
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@ -35,8 +35,8 @@ pub struct Uxn {
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// Note: Using Rc so we can start with many NullDevs and replace them
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pub devices: [Rc<RefCell<dyn Device>>; 16],
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pub pc: u16, // Program counter
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pub wst: Stack, // Data stack
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pub rst: Stack, // Return stack pointer
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pub wst: Rc<RefCell<dyn Stack>>, // Data stack
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pub rst: Rc<RefCell<dyn Stack>>, // Return stack pointer
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}
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impl Uxn {
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@ -62,8 +62,8 @@ impl Uxn {
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Rc::new(RefCell::new(NullDevice::new())), // #0f
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],
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pc: 0x0100,
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wst: Stack::new(),
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rst: Stack::new(),
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wst: Rc::new(RefCell::new(ArrayStack::new())),
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rst: Rc::new(RefCell::new(ArrayStack::new())),
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}
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}
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@ -138,9 +138,9 @@ impl Uxn {
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let [wst, rst] = {
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if rflag == 0 {
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[&mut self.wst, &mut self.rst]
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[self.wst.clone(), self.rst.clone()]
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} else {
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[&mut self.wst, &mut self.rst]
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[self.wst.clone(), self.rst.clone()]
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}
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};
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@ -152,48 +152,51 @@ impl Uxn {
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}
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(_, _, 0, 0x00) => {
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// LIT1
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wst.push1(self.lda1(self.pc + 1)?);
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wst.borrow_mut().push1(self.lda1(self.pc + 1)?);
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self.pc += 1;
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continue 'run;
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}
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(_, _, 1, 0x00) => {
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// LIT2
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wst.push2(self.lda2(self.pc + 1)?);
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wst.borrow_mut().push2(self.lda2(self.pc + 1)?);
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self.pc += 2;
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continue 'run;
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}
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(_, _, 0, 0x01) => {
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// INC1
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let a = wst.pop1()?;
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wst.push1(a + 1);
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let a = wst.borrow_mut().pop1()?;
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wst.borrow_mut().push1(a + 1);
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}
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(_, _, 1, 0x01) => {
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// INC1
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let a = wst.pop2()?;
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wst.push2(a + 1);
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let a = wst.borrow_mut().pop2()?;
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wst.borrow_mut().push2(a + 1);
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}
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(_, _, 0, 0x02) => {
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// POP1
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wst.pop1();
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wst.borrow_mut().pop1();
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}
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(_, _, 1, 0x02) => {
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// POP2
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wst.pop2();
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wst.borrow_mut().pop2();
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}
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(_, _, 0, 0x03) => {
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// NIP1 a b -- a
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let mut wst = wst.borrow_mut();
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let keep = wst.pop1()?;
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wst.pop1();
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wst.push1(keep)?;
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}
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(_, _, 1, 0x03) => {
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// NIP2 a b -- a
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let mut wst = wst.borrow_mut();
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let keep = wst.pop2()?;
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wst.pop2()?;
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wst.push2(keep)?;
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}
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(_, _, 0, 0x04) => {
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// SWP1
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let mut wst = wst.borrow_mut();
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let a = wst.pop1()?;
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let b = wst.pop1()?;
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wst.push1(a)?;
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@ -201,13 +204,15 @@ impl Uxn {
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}
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(_, _, 1, 0x04) => {
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// SWP2
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let mut wst = wst.borrow_mut();
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let a = wst.pop2()?;
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let b = wst.pop2()?;
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wst.push2(a)?;
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wst.push2(b)?;
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}
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(_, _, 0, 0x05) => {
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// ROT
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// ROT1
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let mut wst = wst.borrow_mut();
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let a = wst.pop1()?;
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let b = wst.pop1()?;
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let c = wst.pop1()?;
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@ -216,7 +221,8 @@ impl Uxn {
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wst.push1(a)?;
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}
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(_, _, 1, 0x05) => {
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// ROT
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// ROT2
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let mut wst = wst.borrow_mut();
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let a = wst.pop2()?;
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let b = wst.pop2()?;
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let c = wst.pop2()?;
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@ -226,30 +232,39 @@ impl Uxn {
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}
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(_, _, 0, 0x06) => {
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// DUP2
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let mut wst = wst.borrow_mut();
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let a = wst.peek1()?;
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wst.push1(a)?;
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}
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(_, _, 1, 0x06) => {
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// DUP2
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let mut wst = wst.borrow_mut();
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let a = wst.peek2()?;
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wst.push2(a)?;
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}
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(_, _, 0, 0x07) => {
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// OVR1 a b -- a b a
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if wst.idx < 2 {
|
||||
let mut wst = wst.borrow_mut();
|
||||
if wst.idx() < 2 {
|
||||
return Err(UxnError::StackError(StackError::StackUnderflow));
|
||||
}
|
||||
wst.push1(wst.get1(wst.idx - 2)?)?;
|
||||
let i = wst.idx() - 2;
|
||||
let v = wst.get1(i)?;
|
||||
wst.push1(v)?;
|
||||
}
|
||||
(_, _, 1, 0x07) => {
|
||||
// OVR2 a b -- a b a
|
||||
if wst.idx < 4 {
|
||||
let mut wst = wst.borrow_mut();
|
||||
if wst.idx() < 4 {
|
||||
return Err(UxnError::StackError(StackError::StackUnderflow));
|
||||
}
|
||||
wst.push2(wst.get2(wst.idx - 4)?)?;
|
||||
let i = wst.idx() - 4;
|
||||
let v = wst.get2(i)?;
|
||||
wst.push2(v)?;
|
||||
}
|
||||
(_, _, 0, 0x08) => {
|
||||
// EQU1
|
||||
let mut wst = wst.borrow_mut();
|
||||
let a = wst.pop1()?;
|
||||
let b = wst.pop1()?;
|
||||
if a == b {
|
||||
|
|
@ -260,6 +275,7 @@ impl Uxn {
|
|||
}
|
||||
(_, _, 1, 0x08) => {
|
||||
// EQU2
|
||||
let mut wst = wst.borrow_mut();
|
||||
let a = wst.pop2()?;
|
||||
let b = wst.pop2()?;
|
||||
if a == b {
|
||||
|
|
@ -270,8 +286,9 @@ impl Uxn {
|
|||
}
|
||||
(_, _, 0, 0x09) => {
|
||||
// NEQ1
|
||||
let a = wst.pop1()?;
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop1()?;
|
||||
let a = wst.pop1()?;
|
||||
if a == b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
|
|
@ -280,21 +297,58 @@ impl Uxn {
|
|||
}
|
||||
(_, _, 1, 0x09) => {
|
||||
// NEQ2
|
||||
let a = wst.pop2()?;
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop2()?;
|
||||
let a = wst.pop2()?;
|
||||
if a == b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
wst.push1(1)?;
|
||||
}
|
||||
}
|
||||
(_, _, _, 0x0a) => {
|
||||
// GTH
|
||||
()
|
||||
(_, _, 0, 0x0a) => {
|
||||
// GTH1 a b
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop1()?;
|
||||
let a = wst.pop1()?;
|
||||
if a > b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
wst.push1(1)?;
|
||||
}
|
||||
}
|
||||
(_, _, 1, 0x0a) => {
|
||||
// GTH1 a b
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop2()?;
|
||||
let a = wst.pop2()?;
|
||||
if a > b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
wst.push1(1)?;
|
||||
}
|
||||
}
|
||||
(_, _, 0, 0x0b) => {
|
||||
// LTH1 a b
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop1()?;
|
||||
let a = wst.pop1()?;
|
||||
if a < b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
wst.push1(1)?;
|
||||
}
|
||||
}
|
||||
(_, _, 1, 0x0b) => {
|
||||
// LTH2 a b
|
||||
let mut wst = wst.borrow_mut();
|
||||
let b = wst.pop2()?;
|
||||
let a = wst.pop2()?;
|
||||
if a < b {
|
||||
wst.push1(0)?;
|
||||
} else {
|
||||
wst.push1(1)?;
|
||||
}
|
||||
(_, _, _, 0x0b) => {
|
||||
// LTH
|
||||
()
|
||||
}
|
||||
(_, _, _, 0x0c) => {
|
||||
// JMP
|
||||
|
|
|
|||
Loading…
Reference in a new issue