Example extension: Stacks; fixes to allow module data storage in thread context

Cargo.lock

@@ -71,6 +71,13 @@ dependencies = [
  "num-traits",
 ]
 
+[[package]]
+name = "crsn_stacks"
+version = "0.1.0"
+dependencies = [
+ "crsn",
+]
+
 [[package]]
 name = "dyn-clonable"
 version = "0.9.0"
@@ -114,6 +121,7 @@ dependencies = [
  "anyhow",
  "crsn",
  "crsn_arith",
+ "crsn_stacks",
  "log",
  "simple_logger",
  "thiserror",

Cargo.toml

@@ -3,4 +3,5 @@ members = [
     "launcher",
     "crsn",
     "crsn_arith",
+    "crsn_stacks",
 ]

crsn/src/asm/instr/op.rs

@@ -1,19 +1,15 @@
 use std::fmt::Debug;
 
-use crate::asm::data::{
-    literal::DebugMsg, literal::Label,
-    literal::RoutineName,
-    Rd,
-    Wr,
-};
-use crate::asm::data::literal::Addr;
+
+
 use crate::asm::error::Error;
-use crate::asm::instr::Cond;
+
 use crate::asm::parse::arg_parser::ArgParser;
 use crate::builtin::defs::BuiltinOp;
 use crate::runtime::fault::Fault;
-use crate::runtime::frame::{CallStack, StackFrame};
-use crate::runtime::program::Program;
+
+
+use crate::runtime::run_thread::{RunState, ThreadInfo};
 
 /// A higher level simple opration
 #[derive(Debug)]
@@ -24,7 +20,7 @@ pub enum Op {
 }
 
 pub trait OpTrait: Debug + Send + Sync + 'static {
-    fn execute(&self, program: &Program, call_stack: &mut CallStack, frame: &mut StackFrame) -> Result<EvalRes, Fault>;
+    fn execute(&self, ti : &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault>;
 }
 
 pub enum ParseOpResult {
@@ -64,13 +60,13 @@ impl Default for EvalRes {
 
 
 impl OpTrait for Op {
-    fn execute(&self, program: &Program, call_stack: &mut CallStack, frame: &mut StackFrame) -> Result<EvalRes, Fault> {
+    fn execute(&self, ti : &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault> {
         match self {
             Op::BuiltIn(op) => {
-                op.execute(&program, call_stack, frame)
+                op.execute(ti, state)
             }
             Op::Ext(op) => {
-                op.execute(&program, call_stack, frame)
+                op.execute(ti, state)
             }
         }
     }

crsn/src/asm/mod.rs

@@ -1,6 +1,6 @@
 use std::sync::Arc;
 
-use crate::asm::instr::Op;
+
 use crate::asm::instr::op::AsmModule;
 use crate::runtime::program::Program;
 

crsn/src/asm/parse/parse_op.rs

@@ -1,11 +1,11 @@
-use crate::asm::data::literal::{Label, RoutineName};
+
 use crate::asm::error::Error;
 use crate::asm::instr::Op;
-use crate::asm::instr::cond::parse_cond;
+
 use crate::asm::instr::op::{AsmModule, ParseOpResult};
 use crate::asm::parse::arg_parser::ArgParser;
-use crate::asm::parse::parse_data::{parse_label, parse_rd};
-use crate::asm::parse::sexp_expect::expect_string_atom;
+
+
 use crate::builtin::parse::BuiltinOpParser;
 
 pub fn parse_op(keyword: &str, mut arg_tokens: ArgParser, parsers: &[Box<dyn AsmModule>]) -> Result<Op, Error> {

crsn/src/builtin/defs.rs

@@ -6,6 +6,8 @@ use crate::asm::data::{Rd, Wr};
 pub enum BuiltinOp {
     /// Do nothing
     Nop,
+    /// Stop execution
+    Halt,
     /// Mark a jump target.
     Label(Label),
     /// Jump to a label

crsn/src/builtin/exec.rs

@@ -1,19 +1,26 @@
-use std::ops::Rem;
 
-use num_traits::PrimInt;
+
+
 
 use crate::asm::instr::op::{OpTrait, EvalRes};
 use crate::runtime::fault::Fault;
-use crate::runtime::frame::{CallStack, StackFrame};
-use crate::runtime::program::Program;
+use crate::runtime::frame::{StackFrame};
+
 use crate::builtin::defs::BuiltinOp;
 use crate::asm::data::literal::Addr;
+use crate::runtime::run_thread::{ThreadInfo, RunState};
 
 impl OpTrait for BuiltinOp {
-    fn execute(&self, program: &Program, call_stack: &mut CallStack, frame: &mut StackFrame) -> Result<EvalRes, Fault> {
+    fn execute(&self, info: &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault> {
+        let frame = &mut state.frame;
+        let program = &info.program;
         let mut res = EvalRes::default();
         match self {
             BuiltinOp::Nop => {}
+            BuiltinOp::Halt => {
+                trace!("HALT - stop execution");
+                return Err(Fault::Halt);
+            }
             BuiltinOp::Label(_) | BuiltinOp::FarLabel(_) | BuiltinOp::Routine(_) => {
                 /* this is nop, but without any cost - just markers */
                 res.cycles = 0;
@@ -82,7 +89,7 @@ impl OpTrait for BuiltinOp {
 
                         let mut frame2 = StackFrame::new(pos, &values);
                         std::mem::swap(frame, &mut frame2);
-                        call_stack.push(frame2);
+                        state.call_stack.push(frame2);
                         res.advance = 0;
                     }
                     Err(e) => {
@@ -91,7 +98,7 @@ impl OpTrait for BuiltinOp {
                 }
             }
             BuiltinOp::Ret(retvals) => {
-                match call_stack.pop() {
+                match state.call_stack.pop() {
                     Some(previous) => {
                         let mut values = Vec::with_capacity(retvals.len());
                         for arg in retvals {

crsn/src/builtin/parse.rs

@@ -1,4 +1,4 @@
-use crate::asm::data::{Rd, Wr};
+
 use crate::asm::error::{Error};
 use crate::asm::instr::op::{AsmModule, ParseOpResult};
 use crate::asm::parse::arg_parser::ArgParser;
@@ -30,6 +30,14 @@ impl AsmModule for BuiltinOpParser {
 
     fn parse_op(&self, keyword: &str, mut args: ArgParser) -> Result<ParseOpResult, Error> {
         Ok(ParseOpResult::Parsed(Op::BuiltIn(match keyword {
+            "nop" => {
+                BuiltinOp::Nop
+            }
+
+            "halt" => {
+                BuiltinOp::Halt
+            }
+
             "j" => {
                 let dest = parse_label(args.next())?;
                 BuiltinOp::Jump(dest)

crsn/src/runtime/exec.rs

@@ -1,23 +1,25 @@
-use crate::asm::data::literal::Addr;
-use crate::asm::instr::Op;
+
+
 use crate::asm::instr::op::{EvalRes, OpTrait};
 use crate::runtime::fault::Fault;
-use crate::runtime::frame::StackFrame;
+
 use crate::runtime::run_thread::RunThread;
 
 impl RunThread {
     // TODO unit tests
     pub fn eval_op(&mut self) -> Result<EvalRes, Fault> {
-        let frame = &mut self.frame;
 
-        let op = self.program.read(frame.pc);
+        let state = &mut self.state;
+        let info = &self.info;
+
+        let op = info.program.read(state.frame.pc);
 
-        trace!("### {:04} : {:?}", frame.pc.0, op);
+        trace!("### {:04} : {:?}", state.frame.pc.0, op);
 
         /* Operations can be given different execution times when run in slow mode. */
         /* Presently, all that do anything use 1 cycle. */
 
-        let rv = op.execute(&self.program, &mut self.call_stack, frame);
+        let rv = op.execute(info, state);
         trace!("-> {:?}", rv);
         rv
     }

crsn/src/runtime/fault.rs

@@ -21,6 +21,9 @@ pub enum Fault {
         msg: DebugMsg,
     },
 
+    #[error("Program ended.")]
+    Halt,
+
     // #[error("Memory region {area:?} is locked by thread {owner:?}")]
     // MemoryLocked {
     //     area: MemorySpan,

crsn/src/runtime/run_thread.rs

@@ -8,36 +8,58 @@ use crate::asm::data::literal::Addr;
 use crate::asm::instr::op::EvalRes;
 use crate::runtime::frame::{CallStack, StackFrame};
 use crate::runtime::program::Program;
-
-const CYCLE_TIME: Duration = Duration::from_millis(0);
-//const CYCLE_TIME : Duration = Duration::from_millis(100);
+use crate::runtime::fault::Fault;
 
 #[derive(Clone, Copy, Eq, PartialEq, Debug, Ord, PartialOrd)]
 pub struct ThreadToken(pub u32);
 
 pub struct RunThread {
+    pub(crate) info: ThreadInfo,
+    pub(crate) state: RunState,
+}
+
+pub struct ThreadInfo {
     /// Thread ID
     pub id: ThreadToken,
+    /// Program to run
+    pub program: Arc<Program>,
+    /// Program to run
+    pub cycle_time: Duration,
+}
+
+pub struct RunState {
     /// Active stack frame
     pub frame: StackFrame,
     /// Call stack
     pub call_stack: CallStack,
-    /// Program to run
-    pub program: Arc<Program>,
     /// Extension data
     ext_data: HashMap<TypeId, Box<dyn Any + Send>>,
 }
 
+impl RunState {
+    pub fn ext_mut<T: Send + Default + 'static>(&mut self) -> &mut T {
+        if !self.ext_data.contains_key(&TypeId::of::<T>()) {
+            self.ext_data.insert(TypeId::of::<T>(), Box::new(T::default()));
+        }
+
+        self.ext_data.get_mut(&TypeId::of::<T>()).unwrap()
+            .downcast_mut().unwrap()
+    }
+}
+
 impl RunThread {
     pub fn new(id: ThreadToken, program: Arc<Program>, pc: Addr, args: &[u64]) -> Self {
-        let sf = StackFrame::new(pc, args);
-
         Self {
+            info: ThreadInfo {
                 id,
-            frame: sf,
-            call_stack: vec![],
                 program,
+                cycle_time: Duration::default(),
+            },
+            state: RunState {
+                frame: StackFrame::new(pc, args),
+                call_stack: vec![],
                 ext_data: Default::default(),
+            },
         }
     }
 
@@ -50,12 +72,17 @@ impl RunThread {
     fn run(mut self) {
         'run: loop {
             match self.eval_op() {
-                Ok(EvalRes {
-                       cycles, advance
-                   }) => {
-                    std::thread::sleep(CYCLE_TIME * (cycles as u32));
-                    trace!("Step {}; Status = {}", advance, self.frame.status);
-                    self.frame.pc.advance(advance);
+                Ok(EvalRes { cycles, advance }) => {
+                    std::thread::sleep(self.info.cycle_time * (cycles as u32));
+                    trace!("Step {}; Status = {}", advance, self.state.frame.status);
+                    self.state.frame.pc.advance(advance);
+                    if self.state.frame.status.invalid {
+                        warn!("Operation failed with INVALID status!");
+                    }
+                }
+                Err(Fault::Halt) => {
+                    info!("Program ended.");
+                    break 'run;
                 }
                 Err(e) => {
                     error!("Fault: {:?}", e);
@@ -64,13 +91,4 @@ impl RunThread {
             }
         }
     }
-
-    pub fn ext_mut<T: Send + Default + 'static>(&mut self) -> &mut T {
-        if !self.ext_data.contains_key(&TypeId::of::<T>()) {
-            self.ext_data.insert(TypeId::of::<T>(), Box::new(T::default()));
-        }
-
-        self.ext_data.get_mut(&TypeId::of::<T>()).unwrap()
-            .downcast_mut().unwrap()
-    }
 }

crsn_arith/src/exec.rs

@@ -4,13 +4,15 @@ use num_traits::PrimInt;
 
 use crsn::asm::instr::op::{OpTrait, EvalRes};
 use crsn::runtime::fault::Fault;
-use crsn::runtime::frame::{CallStack, StackFrame};
-use crsn::runtime::program::Program;
+
+
 
 use crate::defs::ArithOp;
+use crsn::runtime::run_thread::{ThreadInfo, RunState};
 
 impl OpTrait for ArithOp {
-    fn execute(&self, _program: &Program, _call_stack: &mut CallStack, frame: &mut StackFrame) -> Result<EvalRes, Fault> {
+    fn execute(&self, _ti : &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault> {
+        let frame = &mut state.frame;
         let eres = EvalRes::default();
         match self {
             ArithOp::Test { a } => {

crsn_arith/src/lib.rs

@@ -1,4 +1,4 @@
-pub use parse::ArithOpParser;
+pub use parse::ArithOps;
 
 mod defs;
 mod parse;

crsn_arith/src/parse.rs

@@ -7,11 +7,11 @@ use crsn::asm::parse::arg_parser::ArgParser;
 use crate::defs::ArithOp;
 
 #[derive(Debug, Clone)]
-pub struct ArithOpParser {
+pub struct ArithOps {
     _internal: ()
 }
 
-impl ArithOpParser {
+impl ArithOps {
     pub fn new() -> Box<dyn AsmModule> {
         Box::new(Self {
             _internal: ()
@@ -19,7 +19,7 @@ impl ArithOpParser {
     }
 }
 
-impl AsmModule for ArithOpParser {
+impl AsmModule for ArithOps {
     fn name(&self) -> &'static str {
         "arith"
     }

crsn_stacks/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "crsn_stacks"
+version = "0.1.0"
+authors = ["Ondřej Hruška <ondra@ondrovo.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+crsn = { path = "../crsn" }

crsn_stacks/src/defs.rs

@@ -0,0 +1,7 @@
+use crsn::asm::data::{Rd, Wr};
+
+#[derive(Clone, Debug, Eq, PartialEq)]
+pub enum StackOp {
+    Push { num: Rd, src: Rd },
+    Pop { dst: Wr, num: Rd },
+}

crsn_stacks/src/exec.rs

@@ -0,0 +1,71 @@
+use std::collections::VecDeque;
+
+
+use crsn::asm::data::literal::Value;
+use crsn::asm::instr::op::{EvalRes, OpTrait};
+use crsn::runtime::fault::Fault;
+
+
+use crsn::runtime::run_thread::{RunState, ThreadInfo};
+
+use crate::defs::StackOp;
+
+struct Stacks {
+    stacks: Vec<VecDeque<Value>>,
+}
+
+impl Default for Stacks {
+    fn default() -> Self {
+        Stacks {
+            stacks: vec![VecDeque::default(); 8],
+        }
+    }
+}
+
+impl OpTrait for StackOp {
+    fn execute(&self, _ti: &ThreadInfo, state: &mut RunState) -> Result<EvalRes, Fault> {
+        let eres = EvalRes::default();
+        match self {
+            StackOp::Push { num, src } => {
+                state.frame.status.clear();
+                let stack_num = state.frame.read(*num)?;
+                let val = state.frame.read(*src)?;
+
+                if stack_num > 8 {
+                    state.frame.status.invalid = true;
+                } else {
+                    let obj: &mut Stacks = state.ext_mut();
+                    obj.stacks[stack_num as usize].push_back(val);
+                }
+            }
+            StackOp::Pop { dst, num } => {
+                state.frame.status.clear();
+                let stack_num = state.frame.read(*num)?;
+
+                if stack_num > 8 {
+                    state.frame.status.invalid = true;
+                } else {
+                    let obj: &mut Stacks = state.ext_mut();
+                    let val = obj.stacks[stack_num as usize].pop_back();
+
+                    let val = match val {
+                        None => {
+                            state.frame.status.overflow = true;
+                            0
+                        }
+                        Some(val) => {
+                            val
+                        }
+                    };
+
+                    state.frame.write(*dst, val)?;
+                }
+
+                // TODO
+            }
+        }
+
+        Ok(eres)
+    }
+    //
+}

crsn_stacks/src/lib.rs

@@ -0,0 +1,6 @@
+pub use parse::StackOps;
+
+mod defs;
+mod parse;
+mod exec;
+

crsn_stacks/src/parse.rs

@@ -0,0 +1,48 @@
+
+use crsn::asm::error::Error;
+use crsn::asm::instr::op::{AsmModule, ParseOpResult};
+use crsn::asm::instr::Op;
+use crsn::asm::parse::arg_parser::ArgParser;
+
+use crate::defs::StackOp;
+
+#[derive(Debug, Clone)]
+pub struct StackOps {
+    _internal: ()
+}
+
+impl StackOps {
+    pub fn new() -> Box<dyn AsmModule> {
+        Box::new(Self {
+            _internal: ()
+        })
+    }
+}
+
+impl AsmModule for StackOps {
+    fn name(&self) -> &'static str {
+        "stacks"
+    }
+
+    fn parse_op(&self, keyword: &str, mut args: ArgParser) -> Result<ParseOpResult, Error> {
+        Ok(ParseOpResult::Parsed(Op::Ext(Box::new(match keyword {
+            "push" => {
+                StackOp::Push {
+                    num: args.next_rd()?,
+                    src: args.next_rd()?,
+                }
+            }
+
+            "pop" => {
+                StackOp::Pop {
+                    dst: args.next_wr()?,
+                    num: args.next_rd()?,
+                }
+            }
+
+            _other => {
+                return Ok(ParseOpResult::Unknown(args));
+            }
+        }))))
+    }
+}

launcher/Cargo.toml

@@ -9,6 +9,7 @@ edition = "2018"
 [dependencies]
 crsn = { path = "../crsn" }
 crsn_arith = { path = "../crsn_arith" }
+crsn_stacks = { path = "../crsn_stacks" }
 
 simple_logger = "1.9.0"
 log = "0.4.11"

launcher/src/main.rs

@@ -4,9 +4,10 @@ extern crate log;
 use simple_logger::SimpleLogger;
 
 use crsn::asm::data::literal::Addr;
-use crsn::runtime::program::Program;
+
 use crsn::runtime::run_thread::{RunThread, ThreadToken};
-use crsn_arith::ArithOpParser;
+use crsn_arith::ArithOps;
+use crsn_stacks::StackOps;
 
 fn main() {
     SimpleLogger::new().init().unwrap();
@@ -42,7 +43,7 @@ fn main() {
         )
         ";*/
 
-    let program = "
+/*    let program = "
     (
         (main
             (j :lbl)
@@ -63,15 +64,35 @@ fn main() {
             (ret r0)
         )
     )
+    ";*/
+
+    let program = "
+    (
+        (main
+            (push 0 10)
+            (push 0 20)
+            (push 0 30)
+            (pop r0 0)
+            (pop r0 0)
+            (pop r0 0)
+            (halt)
+        )
+    )
     ";
 
     let parsers = vec![
-        ArithOpParser::new()
+        ArithOps::new(),
+        StackOps::new(),
     ];
 
     let parsed = crsn::asm::assemble(program, parsers.as_slice()).unwrap();
 
-    let thread = RunThread::new(ThreadToken(0), parsed, Addr(0), &[]);
+    let thread1 = RunThread::new(ThreadToken(0), parsed.clone(), Addr(0), &[]);
+    let thread2 = RunThread::new(ThreadToken(1), parsed.clone(), Addr(0), &[]);
+
+    let a = thread1.start();
+    let b = thread2.start();
 
-    thread.start().join().unwrap();
+    a.join().unwrap();
+    b.join().unwrap();
 }