2023-04-18 23:08:30 +00:00
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pub mod call_stack;
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pub mod config;
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pub mod regs;
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2023-04-22 18:00:19 +00:00
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use crate::bytecode::ops::Operations::*;
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2023-04-18 23:08:30 +00:00
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use crate::bytecode::ops::*;
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use crate::bytecode::types::*;
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2023-04-22 18:00:19 +00:00
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use crate::engine::call_stack::FnCall;
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2023-04-18 23:08:30 +00:00
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use crate::HaltStatus;
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use crate::RuntimeErrors;
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2023-04-22 21:06:33 +00:00
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use alloc::vec::Vec;
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2023-04-18 23:08:30 +00:00
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use config::EngineConfig;
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2023-04-22 21:06:33 +00:00
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use log::trace;
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2023-04-18 23:08:30 +00:00
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use regs::Registers;
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use self::call_stack::CallStack;
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2023-04-22 18:00:19 +00:00
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pub struct Page {
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pub data: [u8; 4096 * 2],
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}
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2023-04-22 21:06:33 +00:00
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pub type EnviromentCall = fn(Registers) -> Result<(), ()>;
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pub fn empty_enviroment_call(reg: Registers) -> Result<(), ()> {
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Err(())
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}
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2023-04-22 18:00:19 +00:00
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2023-04-18 23:08:30 +00:00
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pub struct Engine {
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pub index: usize,
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program: Vec<u8>,
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registers: Registers,
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config: EngineConfig,
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/// BUG: This DOES NOT account for overflowing
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last_timer_count: u32,
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timer_callback: Option<fn() -> u32>,
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memory: Vec<Page>,
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2023-04-22 21:06:33 +00:00
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pub enviroment_call_table: [EnviromentCall; 256],
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2023-04-18 23:08:30 +00:00
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call_stack: CallStack,
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}
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2023-04-22 18:00:19 +00:00
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impl Engine {
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pub fn read_mem_addr(&mut self, address: u64) -> u8 {
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// println!("{}", address);
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255
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}
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2023-04-22 21:06:33 +00:00
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pub fn set_timer_callback(&mut self, func: fn() -> u32) {
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self.timer_callback = Some(func);
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}
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2023-04-22 18:00:19 +00:00
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}
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2023-04-18 23:08:30 +00:00
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impl Engine {
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pub fn new(program: Vec<u8>) -> Self {
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Self {
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index: 0,
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program,
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registers: Registers::new(),
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config: EngineConfig::default(),
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last_timer_count: 0,
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timer_callback: None,
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2023-04-22 21:06:33 +00:00
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enviroment_call_table: [empty_enviroment_call; 256],
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memory: Vec::new(),
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call_stack: Vec::new(),
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2023-04-18 23:08:30 +00:00
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}
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}
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2023-04-22 21:06:33 +00:00
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2023-04-18 23:08:30 +00:00
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pub fn dump(&self) {
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2023-04-22 21:06:33 +00:00
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trace!("Registers");
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trace!(
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2023-04-18 23:08:30 +00:00
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"A {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X}",
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self.registers.a0,
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self.registers.a1,
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self.registers.a2,
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self.registers.a3,
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self.registers.a4,
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self.registers.a5,
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self.registers.a6,
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self.registers.a7,
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self.registers.a8,
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self.registers.a9,
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);
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trace!(
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2023-04-18 23:08:30 +00:00
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"B {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X}",
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self.registers.b0,
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self.registers.b1,
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self.registers.b2,
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self.registers.b3,
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self.registers.b4,
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self.registers.b5,
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self.registers.b6,
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self.registers.b7,
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self.registers.b8,
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self.registers.b9,
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);
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2023-04-22 21:06:33 +00:00
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trace!(
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2023-04-18 23:08:30 +00:00
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"C {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X} {:02X}",
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self.registers.c0,
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self.registers.c1,
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self.registers.c2,
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self.registers.c3,
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self.registers.c4,
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self.registers.c5,
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self.registers.c6,
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self.registers.c7,
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self.registers.c8,
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self.registers.c9,
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);
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2023-04-22 21:06:33 +00:00
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trace!(
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2023-04-18 23:08:30 +00:00
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"D0-D4 {:016X} {:016X} {:016X} {:016X} {:016X}
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D5-D9 {:016X} {:016X} {:016X} {:016X} {:016X}",
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self.registers.d0,
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self.registers.d1,
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self.registers.d2,
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self.registers.d3,
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self.registers.d4,
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self.registers.d5,
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self.registers.d6,
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self.registers.d7,
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self.registers.d8,
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self.registers.d9,
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);
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2023-04-22 21:06:33 +00:00
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trace!(
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2023-04-18 23:08:30 +00:00
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"E0-E4 {:016X} {:016X} {:016X} {:016X} {:016X}
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E5-E9 {:016X} {:016X} {:016X} {:016X} {:016X}",
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self.registers.e0,
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self.registers.e1,
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self.registers.e2,
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self.registers.e3,
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self.registers.e4,
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self.registers.e5,
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self.registers.e6,
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self.registers.e7,
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self.registers.e8,
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self.registers.e9,
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);
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2023-04-22 21:06:33 +00:00
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trace!(
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2023-04-18 23:08:30 +00:00
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"F0-F4 {:016X} {:016X} {:016X} {:016X} {:016X}
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F5-F9 {:016X} {:016X} {:016X} {:016X} {:016X}",
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self.registers.f0,
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self.registers.f1,
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self.registers.f2,
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self.registers.f3,
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self.registers.f4,
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self.registers.f5,
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self.registers.f6,
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self.registers.f7,
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self.registers.f8,
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self.registers.f9,
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);
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}
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pub fn run(&mut self) -> Result<HaltStatus, RuntimeErrors> {
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use HaltStatus::*;
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use RuntimeErrors::*;
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loop {
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// Break out of the loop
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2023-04-22 18:00:19 +00:00
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if self.index + 1 == self.program.len() {
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2023-04-18 23:08:30 +00:00
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break;
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}
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2023-04-19 02:41:27 +00:00
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let op = (self.program[self.index], self.program[self.index + 1]);
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2023-04-22 18:00:19 +00:00
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// println!("OP {} INDEX {}", op.0, self.index);
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2023-04-18 23:08:30 +00:00
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match op {
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2023-04-19 02:41:27 +00:00
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(0, _) => {
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2023-04-22 21:06:33 +00:00
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trace!("NO OP");
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2023-04-18 23:08:30 +00:00
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self.index += 1;
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2023-04-19 02:41:27 +00:00
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}
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// Add a 8 bit num
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(1, 1) => {
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let lhs = self.program[self.index + 2];
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2023-04-22 18:00:19 +00:00
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// println!("LHS 8BIT {}", lhs);
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2023-04-19 02:41:27 +00:00
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let rhs = self.program[self.index + 3];
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2023-04-22 18:00:19 +00:00
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// println!("RHS 8BIT {}", rhs);
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2023-04-18 23:08:30 +00:00
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2023-04-19 02:41:27 +00:00
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let ret = lhs + rhs;
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let reg = self.program[self.index + 4];
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2023-04-18 23:08:30 +00:00
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2023-04-19 02:41:27 +00:00
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match reg {
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2023-04-18 23:08:30 +00:00
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0xA0..=0xC9 => {
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2023-04-19 02:41:27 +00:00
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self.set_register_8(reg, ret);
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2023-04-18 23:08:30 +00:00
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}
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2023-04-19 02:41:27 +00:00
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0xD0..=0xF9 => {
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panic!("Register oversized")
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2023-04-18 23:08:30 +00:00
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}
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_ => {
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2023-04-19 02:41:27 +00:00
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panic!("Not a register.")
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2023-04-18 23:08:30 +00:00
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}
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}
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2023-04-22 18:00:19 +00:00
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self.index += 4;
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2023-04-18 23:08:30 +00:00
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}
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2023-04-19 02:41:27 +00:00
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// Add a 64 bit num
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(1, 2) => {
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let mut lhs_array = [0; 8];
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let mut rhs_array = [0; 8];
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2023-04-18 23:08:30 +00:00
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2023-04-19 02:41:27 +00:00
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for (index, byte) in self.program[self.index + 2..self.index + 10]
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.into_iter()
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.enumerate()
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{
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lhs_array[index] = *byte;
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2023-04-18 23:08:30 +00:00
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}
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2023-04-19 02:41:27 +00:00
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let lhs = u64::from_be_bytes(lhs_array);
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2023-04-22 18:00:19 +00:00
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// println!("LHS 64BIT {}", lhs);
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2023-04-18 23:08:30 +00:00
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2023-04-19 02:41:27 +00:00
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for (index, byte) in self.program[self.index + 10..self.index + 18]
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.into_iter()
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.enumerate()
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{
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rhs_array[index] = *byte;
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2023-04-18 23:08:30 +00:00
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}
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2023-04-19 02:41:27 +00:00
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let rhs = u64::from_be_bytes(rhs_array);
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2023-04-22 18:00:19 +00:00
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// println!("RHS 64BIT {}", rhs);
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2023-04-19 02:41:27 +00:00
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let ret = lhs + rhs;
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let reg = self.program[self.index + 18];
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2023-04-22 18:00:19 +00:00
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// println!("Store {} in {:02X}", ret, reg);
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match reg {
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0xA0..=0xC9 => {
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panic!("Register undersized")
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}
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0xD0..=0xF9 => {
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self.set_register_64(reg, ret);
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}
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_ => {
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panic!("Not a register.")
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}
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}
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self.index += 19;
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}
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(2, 1) => {
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let lhs = self.program[self.index + 2];
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// println!("LHS 8BIT {}", lhs);
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let rhs = self.program[self.index + 3];
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// println!("RHS 8BIT {}", rhs);
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let ret = lhs - rhs;
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let reg = self.program[self.index + 4];
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match reg {
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0xA0..=0xC9 => {
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self.set_register_8(reg, ret);
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}
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0xD0..=0xF9 => {
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panic!("Register oversized")
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}
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_ => {
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panic!("Not a register.")
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}
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}
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self.index += 4;
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}
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(2, 2) => {
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let mut lhs_array = [0; 8];
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let mut rhs_array = [0; 8];
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for (index, byte) in self.program[self.index + 2..self.index + 10]
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.into_iter()
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.enumerate()
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{
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lhs_array[index] = *byte;
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}
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let lhs = u64::from_be_bytes(lhs_array);
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// println!("LHS 64BIT {}", lhs);
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for (index, byte) in self.program[self.index + 10..self.index + 18]
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.into_iter()
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.enumerate()
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{
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rhs_array[index] = *byte;
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}
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let rhs = u64::from_be_bytes(rhs_array);
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// println!("RHS 64BIT {}", rhs);
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let ret = lhs - rhs;
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let reg = self.program[self.index + 18];
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// println!("Store {} in {:02X}", ret, reg);
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2023-04-19 02:41:27 +00:00
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match reg {
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0xA0..=0xC9 => {
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panic!("Register undersized")
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2023-04-18 23:08:30 +00:00
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}
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2023-04-19 02:41:27 +00:00
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0xD0..=0xF9 => {
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self.set_register_64(reg, ret);
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2023-04-18 23:08:30 +00:00
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}
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_ => {
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2023-04-19 02:41:27 +00:00
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panic!("Not a register.")
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2023-04-18 23:08:30 +00:00
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}
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}
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2023-04-19 02:41:27 +00:00
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self.index += 19;
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2023-04-18 23:08:30 +00:00
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}
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2023-04-22 18:00:19 +00:00
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(2, 3) => {
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// 8 bit
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self.index += 4;
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}
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// TODO: Implement 64 bit register to register subtraction
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(2, 4) => {
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// 64 bit
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self.index += 19;
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}
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// Read from address to register
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(5, 0) => {
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let mut addr_array = [0; 8];
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for (index, byte) in self.program[self.index + 2..self.index + 10]
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.into_iter()
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.enumerate()
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{
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addr_array[index] = *byte;
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}
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let addr = u64::from_be_bytes(addr_array);
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2023-04-22 21:06:33 +00:00
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trace!("addr {}", addr);
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2023-04-22 18:00:19 +00:00
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|
|
let ret = self.read_mem_addr(addr);
|
|
|
|
let reg = self.program[self.index + 10];
|
2023-04-22 21:06:33 +00:00
|
|
|
trace!("reg {}", reg);
|
2023-04-22 18:00:19 +00:00
|
|
|
self.set_register_8(reg, ret);
|
|
|
|
self.index += 9;
|
|
|
|
}
|
|
|
|
|
2023-04-22 21:06:33 +00:00
|
|
|
(10, int) => {
|
|
|
|
println!("Enviroment Call {}", int);
|
|
|
|
self.enviroment_call_table[int as usize](self.registers);
|
|
|
|
self.index += 2;
|
|
|
|
}
|
|
|
|
|
2023-04-22 18:00:19 +00:00
|
|
|
(100, _) => {
|
|
|
|
if self.call_stack.len() > self.config.call_stack_depth {
|
2023-04-22 21:06:33 +00:00
|
|
|
trace!("Callstack {}", self.call_stack.len());
|
|
|
|
break;
|
2023-04-22 18:00:19 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
let mut addr_array = [0; 8];
|
|
|
|
|
|
|
|
for (index, byte) in self.program[self.index + 1..self.index + 9]
|
|
|
|
.into_iter()
|
|
|
|
.enumerate()
|
|
|
|
{
|
2023-04-22 21:06:33 +00:00
|
|
|
trace!("byte {}", byte);
|
2023-04-22 18:00:19 +00:00
|
|
|
addr_array[index] = *byte;
|
|
|
|
}
|
|
|
|
let addr = usize::from_be_bytes(addr_array);
|
|
|
|
if addr > self.program.len() {
|
|
|
|
panic!("Invalid jump address {}", addr)
|
|
|
|
} else {
|
|
|
|
let call = FnCall { ret: self.index };
|
|
|
|
self.call_stack.push(call);
|
|
|
|
|
|
|
|
self.index = addr;
|
2023-04-22 21:06:33 +00:00
|
|
|
trace!("Jumping to {}", addr);
|
2023-04-22 18:00:19 +00:00
|
|
|
|
|
|
|
self.dump();
|
|
|
|
// panic!();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
_op_pair => {
|
|
|
|
// println!("OP Pair {}", op_pair.0);
|
2023-04-18 23:08:30 +00:00
|
|
|
self.index += 1;
|
|
|
|
}
|
|
|
|
}
|
2023-04-19 02:41:27 +00:00
|
|
|
|
2023-04-18 23:08:30 +00:00
|
|
|
// Finish step
|
|
|
|
|
|
|
|
if self.timer_callback.is_some() {
|
|
|
|
let ret = self.timer_callback.unwrap()();
|
|
|
|
if (ret - self.last_timer_count) >= self.config.quantum {
|
|
|
|
return Ok(Running);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
Ok(Halted)
|
|
|
|
}
|
2023-04-19 02:41:27 +00:00
|
|
|
|
|
|
|
pub fn set_register_8(&mut self, register: u8, value: u8) {
|
|
|
|
match register {
|
|
|
|
0xA0 => self.registers.a0 = value,
|
|
|
|
0xA1 => self.registers.a1 = value,
|
|
|
|
0xA2 => self.registers.a2 = value,
|
|
|
|
0xA3 => self.registers.a3 = value,
|
|
|
|
0xA4 => self.registers.a4 = value,
|
|
|
|
0xA5 => self.registers.a5 = value,
|
|
|
|
0xA6 => self.registers.a6 = value,
|
|
|
|
0xA7 => self.registers.a7 = value,
|
|
|
|
0xA8 => self.registers.a8 = value,
|
|
|
|
0xA9 => self.registers.a9 = value,
|
|
|
|
//
|
|
|
|
0xB0 => self.registers.b0 = value,
|
|
|
|
0xB1 => self.registers.b1 = value,
|
|
|
|
0xB2 => self.registers.b2 = value,
|
|
|
|
0xB3 => self.registers.b3 = value,
|
|
|
|
0xB4 => self.registers.b4 = value,
|
|
|
|
0xB5 => self.registers.b5 = value,
|
|
|
|
0xB6 => self.registers.b6 = value,
|
|
|
|
0xB7 => self.registers.b7 = value,
|
|
|
|
0xB8 => self.registers.b8 = value,
|
|
|
|
0xB9 => self.registers.b9 = value,
|
|
|
|
//
|
|
|
|
0xC0 => self.registers.c0 = value,
|
|
|
|
0xC1 => self.registers.c1 = value,
|
|
|
|
0xC2 => self.registers.c2 = value,
|
|
|
|
0xC3 => self.registers.c3 = value,
|
|
|
|
0xC4 => self.registers.c4 = value,
|
|
|
|
0xC5 => self.registers.c5 = value,
|
|
|
|
0xC6 => self.registers.c6 = value,
|
|
|
|
0xC7 => self.registers.c7 = value,
|
|
|
|
0xC8 => self.registers.c8 = value,
|
|
|
|
0xC9 => self.registers.c9 = value,
|
|
|
|
|
|
|
|
_ => {
|
|
|
|
panic!("Unlikely you are here if everyone behaved.\nThis register is not 8 bit")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
pub fn set_register_64(&mut self, register: u8, value: u64) {
|
|
|
|
match register {
|
|
|
|
0xD0 => self.registers.d0 = value,
|
|
|
|
0xD1 => self.registers.d1 = value,
|
|
|
|
0xD2 => self.registers.d2 = value,
|
|
|
|
0xD3 => self.registers.d3 = value,
|
|
|
|
0xD4 => self.registers.d4 = value,
|
|
|
|
0xD5 => self.registers.d5 = value,
|
|
|
|
0xD6 => self.registers.d6 = value,
|
|
|
|
0xD7 => self.registers.d7 = value,
|
|
|
|
0xD8 => self.registers.d8 = value,
|
|
|
|
0xD9 => self.registers.d9 = value,
|
|
|
|
//
|
|
|
|
0xE0 => self.registers.f0 = value,
|
|
|
|
0xE1 => self.registers.f1 = value,
|
|
|
|
0xE2 => self.registers.f2 = value,
|
|
|
|
0xE3 => self.registers.f3 = value,
|
|
|
|
0xE4 => self.registers.f4 = value,
|
|
|
|
0xE5 => self.registers.f5 = value,
|
|
|
|
0xE6 => self.registers.f6 = value,
|
|
|
|
0xE7 => self.registers.f7 = value,
|
|
|
|
0xE8 => self.registers.f8 = value,
|
|
|
|
0xE9 => self.registers.f9 = value,
|
|
|
|
|
|
|
|
//
|
|
|
|
0xF0 => self.registers.f0 = value,
|
|
|
|
0xF1 => self.registers.f1 = value,
|
|
|
|
0xF2 => self.registers.f2 = value,
|
|
|
|
0xF3 => self.registers.f3 = value,
|
|
|
|
0xF4 => self.registers.f4 = value,
|
|
|
|
0xF5 => self.registers.f5 = value,
|
|
|
|
0xF6 => self.registers.f6 = value,
|
|
|
|
0xF7 => self.registers.f7 = value,
|
|
|
|
0xF8 => self.registers.f8 = value,
|
|
|
|
0xF9 => self.registers.f9 = value,
|
|
|
|
|
|
|
|
_ => {
|
|
|
|
panic!("Unlikely you are here if everyone behaved.\nThis register is not 64 bit")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2023-04-18 23:08:30 +00:00
|
|
|
}
|