Implement address decoding

Cargo.lock

@@ -2,16 +2,37 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "ahash"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+dependencies = [
+ "cfg-if",
+ "once_cell",
+ "version_check",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
+[[package]]
+name = "hashbrown"
+version = "0.13.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43a3c133739dddd0d2990f9a4bdf8eb4b21ef50e4851ca85ab661199821d510e"
+dependencies = [
+ "ahash",
+]
+
 [[package]]
 name = "holey_bytes"
 version = "0.1.0"
 dependencies = [
+ "hashbrown",
  "log",
 ]
 
@@ -23,3 +44,15 @@ checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
 dependencies = [
  "cfg-if",
 ]
+
+[[package]]
+name = "once_cell"
+version = "1.17.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b7e5500299e16ebb147ae15a00a942af264cf3688f47923b8fc2cd5858f23ad3"
+
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2021"
 
 [dependencies]
 log = "*"
+hashbrown = "0.13.2"

src/engine/mod.rs

@@ -7,6 +7,7 @@ use crate::bytecode::ops::*;
 use crate::bytecode::types::*;
 
 use crate::engine::call_stack::FnCall;
+use crate::memory;
 use crate::HaltStatus;
 use crate::RuntimeErrors;
 use alloc::vec::Vec;
@@ -15,14 +16,15 @@ use log::trace;
 use regs::Registers;
 
 use self::call_stack::CallStack;
-
+#[derive(Debug, Clone, Copy)]
 pub struct Page {
     pub data: [u8; 4096 * 2],
 }
-pub type EnviromentCall = fn(Registers) -> Result<(), ()>;
+pub type EnviromentCall = fn(Registers) -> Result<Registers, u64>;
 
-pub fn empty_enviroment_call(reg: Registers) -> Result<(), ()> {
-    Err(())
+pub fn empty_enviroment_call(reg: Registers) -> Result<Registers, u64> {
+    trace!("Registers {:?}", reg);
+    Err(0)
 }
 
 pub struct Engine {
@@ -34,7 +36,7 @@ pub struct Engine {
     /// BUG: This DOES NOT account for overflowing
     last_timer_count: u32,
     timer_callback: Option<fn() -> u32>,
-    memory: Vec<Page>,
+    memory: memory::Memory,
     pub enviroment_call_table: [EnviromentCall; 256],
     call_stack: CallStack,
 }
@@ -59,7 +61,7 @@ impl Engine {
             last_timer_count: 0,
             timer_callback: None,
             enviroment_call_table: [empty_enviroment_call; 256],
-            memory: Vec::new(),
+            memory: memory::Memory::new(),
             call_stack: Vec::new(),
         }
     }
@@ -328,7 +330,13 @@ F5-F9 {:016X} {:016X} {:016X} {:016X} {:016X}",
 
                 (10, int) => {
                     println!("Enviroment Call {}", int);
-                    self.enviroment_call_table[int as usize](self.registers);
+                    let ret = self.enviroment_call_table[int as usize](self.registers);
+                    match ret {
+                        Ok(_) => {}
+                        Err(err) => {
+                            return Err(HostError(err));
+                        }
+                    }
                     self.index += 2;
                 }
 

src/lib.rs

@@ -13,6 +13,7 @@ use engine::Engine;
 pub enum RuntimeErrors {
     InvalidOpcode(u8),
     RegisterTooSmall,
+    HostError(u64),
 }
 
 // If you solve the halting problem feel free to remove this

src/main.rs

@@ -1,5 +1,3 @@
-use std::{result, time::Duration};
-
 use holey_bytes::{
     bytecode::ops::{Operations::*, RWSubTypes::*, SubTypes::*},
     engine::{regs::Registers, Engine},
@@ -7,54 +5,41 @@ use holey_bytes::{
 };
 
 fn main() -> Result<(), RuntimeErrors> {
-    let mut results: Vec<Duration> = vec![];
-    let iters = 1;
-    for _ in 0..iters {
-        // #[rustfmt::skip]
-        // let prog: Vec<u8> = vec![
-        //     // NOP as u8, NOP as u8,
-        //     ADD as u8, EightBit as u8, 100, 20, 0xA7,
-        //     ADD as u8,
-        //         EightBit as u8, 1, 0, 0xB0,
-        //     ADD as u8,
-        //         SixtyFourBit as u8,
-        //             0, 0, 0, 0, 0, 0, 0, 0,
-        //             0, 0, 0, 0, 0, 0, 0, 2, 0xD0,
-        //     SUB as u8, EightBit as u8, 255, 0, 0xA7,
-        //     ADD as u8, Register8 as u8, 0xA7, 0xB0, 0xA7,
-        //     LOAD as u8, AddrToReg as u8,
-        //                 0, 0, 0, 0, 0, 0, 0, 2,
-        //                 0xA0,
+    #[rustfmt::skip]
+        let prog: Vec<u8> = vec![
+            // NOP as u8, NOP as u8,
             // 10, 10,
-        //     JUMP as u8, 0, 0, 0, 0, 0, 0, 0, 5,
-        // ];
-        let prog = vec![10, 10];
 
-        use std::time::Instant;
-        let now = Instant::now();
+            ADD as u8, EightBit as u8, 100, 20, 0xA7,
+            ADD as u8,
+                EightBit as u8, 1, 0, 0xB0,
+            ADD as u8,
+                SixtyFourBit as u8,
+                    0, 0, 0, 0, 0, 0, 0, 0,
+                    0, 0, 0, 0, 0, 0, 0, 2, 0xD0,
+            SUB as u8, EightBit as u8, 255, 0, 0xA7,
+            ADD as u8, Register8 as u8, 0xA7, 0xB0, 0xA7,
+            LOAD as u8, AddrToReg as u8,
+                        0, 0, 0, 0, 0, 0, 0, 2,
+                        0xA0,
+            JUMP as u8, 0, 0, 0, 0, 0, 0, 0, 5,
+        ];
 
     let mut eng = Engine::new(prog);
 
-        eng.set_timer_callback(time);
+    // eng.set_timer_callback(time);
     eng.enviroment_call_table[10] = print_fn;
     eng.run()?;
     eng.dump();
-        let elapsed = now.elapsed();
-        // println!("Elapsed: {:.2?}", elapsed);
-        results.push(elapsed);
-    }
-    let mut val = 0;
-    for x in results {
-        val = val + x.as_micros();
-    }
-    println!("micro seconds {}", val / iters);
+
     Ok(())
 }
 
 pub fn time() -> u32 {
     9
 }
-pub fn print_fn(reg: Registers) -> Result<(), ()> {
+pub fn print_fn(mut reg: Registers) -> Result<Registers, u64> {
     println!("{:?}", reg);
-    Ok(())
+
+    Ok(reg)
 }

src/memory.rs

@@ -1,18 +1,42 @@
+use hashbrown::HashMap;
+use log::trace;
+
+use crate::{engine::Page, RuntimeErrors};
+
 pub struct Memory {
     //TODO: hashmap with the start bytes as key and end bytes as offset
+    inner: HashMap<u64, Page>,
 }
+
 impl Memory {
-    pub fn read_addr8(&mut self, address: u64) -> u8 {
-        0
+    pub fn new() -> Self {
+        Self {
+            inner: HashMap::new(),
         }
-    pub fn read_addr64(&mut self, address: u64) -> u64 {
-        0
     }
 
-    pub fn set_addr8(&mut self, address: u64, value: u8) -> u8 {
-        0
+    pub fn map_vec(&mut self, address: u64, vec: Vec<u8>) {}
+}
+
+impl Memory {
+    pub fn read_addr8(&mut self, address: u64) -> Result<u8, RuntimeErrors> {
+        let (page, offset) = addr_to_page(address);
+        let val: u8 = self.inner.get(&page).unwrap().data[offset as usize];
+        trace!("Value read {} from page {} offset {}", val, page, offset);
+        Ok(val)
+    }
+    pub fn read_addr64(&mut self, address: u64) -> u64 {
+        unimplemented!()
+    }
+
+    pub fn set_addr8(&self, address: u64, value: u8) -> Result<(), RuntimeErrors> {
+        unimplemented!()
     }
     pub fn set_addr64(&mut self, address: u64, value: u64) -> u64 {
-        0
+        unimplemented!()
     }
 }
+
+fn addr_to_page(addr: u64) -> (u64, u64) {
+    (addr / 8192, addr % 8192)
+}