Changed register handling

hbvm/Cargo.toml

@@ -3,8 +3,6 @@ name = "hbvm"
 version = "0.1.0"
 edition = "2021"
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
 log = "*"
 hashbrown = "0.13.2"

hbvm/src/engine/mod.rs

@@ -1,3 +1,5 @@
+use log::info;
+
 pub mod call_stack;
 pub mod config;
 pub mod enviroment_calls;
@@ -7,12 +9,13 @@ pub mod tests;
 
 use {
     self::call_stack::CallStack,
-    crate::{memory, HaltStatus, RuntimeErrors},
+    crate::{engine::enviroment_calls::EnviromentCall, memory, HaltStatus, RuntimeErrors},
     alloc::vec::Vec,
     config::EngineConfig,
     log::trace,
     regs::Registers,
 };
+
 // pub const PAGE_SIZE: usize = 8192;
 
 pub struct RealPage {
@@ -23,8 +26,8 @@ pub struct RealPage {
 pub struct VMPage {
     pub data: [u8; 8192],
 }
-impl VMPage {
-    pub fn new() -> Self {
+impl Default for VMPage {
+    fn default() -> Self {
         Self {
             data: [0; 4096 * 2],
         }
@@ -52,10 +55,10 @@ pub fn empty_enviroment_call(engine: &mut Engine) -> Result<&mut Engine, u64> {
 }
 
 pub struct Engine {
-    pub index:     usize,
-    pub program:   Vec<u8>,
+    pub pc: usize,
+    pub program: Vec<u8>,
     pub registers: Registers,
-    pub config:    EngineConfig,
+    pub config: EngineConfig,
 
     /// BUG: This DOES NOT account for overflowing
     pub last_timer_count: u32,
@@ -64,12 +67,11 @@ pub struct Engine {
     pub enviroment_call_table: [Option<EnviromentCall>; 256],
     pub call_stack: CallStack,
 }
-use crate::engine::enviroment_calls::EnviromentCall;
+
 impl Engine {
     pub fn set_timer_callback(&mut self, func: fn() -> u32) {
         self.timer_callback = Some(func);
     }
-    pub fn set_register(&mut self, register: u8, value: u64) {}
 }
 
 impl Engine {
@@ -81,9 +83,9 @@ impl Engine {
         trace!("{:?}", mem.read_addr8(0));
         let ecall_table: [Option<EnviromentCall>; 256] = [None; 256];
         Self {
-            index: 0,
+            pc: 0,
             program,
-            registers: Registers::new(),
+            registers: Registers::default(),
             config: EngineConfig::default(),
             last_timer_count: 0,
             timer_callback: None,
@@ -95,6 +97,6 @@ impl Engine {
 
     pub fn dump(&self) {}
     pub fn run(&mut self) -> Result<HaltStatus, RuntimeErrors> {
-        Ok(HaltStatus::Halted)
+        Ok(HaltStatus::Running)
     }
 }

hbvm/src/engine/regs.rs

@@ -1,32 +1,67 @@
-#[rustfmt::skip]
-#[derive(Debug, Clone, Copy)]
-pub struct Registers {
-    pub a0: u64, pub b0: u64, pub c0: u64, pub d0: u64, pub e0: u64, pub f0: u64,
-    pub a1: u64, pub b1: u64, pub c1: u64, pub d1: u64, pub e1: u64, pub f1: u64,
-    pub a2: u64, pub b2: u64, pub c2: u64, pub d2: u64, pub e2: u64, pub f2: u64,
-    pub a3: u64, pub b3: u64, pub c3: u64, pub d3: u64, pub e3: u64, pub f3: u64,
-    pub a4: u64, pub b4: u64, pub c4: u64, pub d4: u64, pub e4: u64, pub f4: u64,
-    pub a5: u64, pub b5: u64, pub c5: u64, pub d5: u64, pub e5: u64, pub f5: u64,
-    pub a6: u64, pub b6: u64, pub c6: u64, pub d6: u64, pub e6: u64, pub f6: u64,
-    pub a7: u64, pub b7: u64, pub c7: u64, pub d7: u64, pub e7: u64, pub f7: u64,
-    pub a8: u64, pub b8: u64, pub c8: u64, pub d8: u64, pub e8: u64, pub f8: u64,
-    pub a9: u64, pub b9: u64, pub c9: u64, pub d9: u64, pub e9: u64, pub f9: u64,
-}
+use core::{
+    fmt::Debug,
+    ops::{Index, IndexMut},
+};
 
-impl Registers {
-    #[rustfmt::skip]
-    pub fn new() -> Self{
-        Self {
-            a0: 0, b0: 0, c0: 0, d0: 0, e0: 0, f0: 0,
-            a1: 0, b1: 0, c1: 0, d1: 0, e1: 0, f1: 0,
-            a2: 0, b2: 0, c2: 0, d2: 0, e2: 0, f2: 0,
-            a3: 0, b3: 0, c3: 0, d3: 0, e3: 0, f3: 0,
-            a4: 0, b4: 0, c4: 0, d4: 0, e4: 0, f4: 0,
-            a5: 0, b5: 0, c5: 0, d5: 0, e5: 0, f5: 0,
-            a6: 0, b6: 0, c6: 0, d6: 0, e6: 0, f6: 0,
-            a7: 0, b7: 0, c7: 0, d7: 0, e7: 0, f7: 0,
-            a8: 0, b8: 0, c8: 0, d8: 0, e8: 0, f8: 0,
-            a9: 0, b9: 0, c9: 0, d9: 0, e9: 0, f9: 0,
-        }
+#[derive(Debug, Clone, Copy)]
+pub struct Registers([Value; 60]);
+
+impl Index<u8> for Registers {
+    type Output = Value;
+
+    #[inline]
+    fn index(&self, index: u8) -> &Self::Output {
+        &self.0[index as usize]
+    }
+}
+
+impl IndexMut<u8> for Registers {
+    #[inline]
+    fn index_mut(&mut self, index: u8) -> &mut Self::Output {
+        &mut self.0[index as usize]
+    }
+}
+
+impl Default for Registers {
+    fn default() -> Self {
+        Self([Value { u: 0 }; 60])
+    }
+}
+
+/// # Safety
+/// The macro invoker shall make sure that byte reinterpret-cast
+/// won't cause undefined behaviour.
+macro_rules! value_def {
+    ($($fname:ident : $fty:ident, $getter:ident);* $(;)?) => {
+        #[derive(Clone, Copy)]
+        pub union Value {
+            $($fname: $fty),*
+        }
+
+        impl Value {$(
+            #[inline]
+            pub fn $getter(&self) -> $fty {
+                unsafe { self.$fname }
+            }
+        )*}
+
+        $(impl From<$fty> for Value {
+            #[inline]
+            fn from($fname: $fty) -> Self {
+                Self { $fname }
+            }
+        })*
+    }
+}
+
+value_def! {
+    u: u64, unsigned;
+    s: i64, signed;
+    f: f64, float;
+}
+
+impl Debug for Value {
+    fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
+        self.unsigned().fmt(f)
     }
 }

hbvm/src/main.rs

@@ -1,21 +1,21 @@
 use hbvm::{
-    bytecode::ops::{Operations::*, RWSubTypes::*},
+    bytecode::ops::{opcode::*},
     engine::Engine,
-    RuntimeErrors,
+    RuntimeErrors, HaltStatus,
 };
 
 fn main() -> Result<(), RuntimeErrors> {
     // TODO: Grab program from cmdline
     #[rustfmt::skip]
         let prog: Vec<u8> = vec![
-            NOP as u8,            
-            JUMP as u8, 0, 0, 0, 0, 0, 0, 0, 0,
+            NOP,            
+            JUMP, 0, 0, 0, 0, 0, 0, 0, 0,
         ];
 
     let mut eng = Engine::new(prog);
     // eng.set_timer_callback(time);
     eng.enviroment_call_table[10] = Some(print_fn);
-    eng.run()?;
+    while eng.run()? != HaltStatus::Halted {}
     eng.dump();
     println!("{:#?}", eng.registers);
 
@@ -25,6 +25,7 @@ fn main() -> Result<(), RuntimeErrors> {
 pub fn time() -> u32 {
     9
 }
+
 pub fn print_fn(engine: &mut Engine) -> Result<&mut Engine, u64> {
     println!("hello");
     Ok(engine)

hbvm/src/memory.rs

@@ -52,7 +52,7 @@ impl Memory {
                 page.data()[offset as usize] = value;
             }
             None => {
-                let mut pg = VMPage::new();
+                let mut pg = VMPage::default();
                 pg.data[offset as usize] = value;
                 self.inner.insert(page, Page::VMPage(pg));
                 trace!("Mapped page {}", page);