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optimize labels, jumps

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This commit is contained in:
MightyPork
2020-10-04 22:45:34 +02:00
parent b06ef50acd
commit 810ed2dddc
10 changed files with 227 additions and 106 deletions
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crsn/src/asm/instr/flatten.rs
+19 -11
View File
@@ -6,6 +6,7 @@ use crate::asm::data::literal::{Label, Value};
use crate::asm::error::{AsmError, CrsnError};
use crate::asm::instr::{Cond, Instr, Op, Routine};
use crate::builtin::defs::BuiltinOp;
use crate::builtin::defs::Barrier;
/// A trait for something that can turn into multiple instructions
pub trait Flatten {
@@ -57,7 +58,7 @@ impl Flatten for Vec<Box<dyn Flatten>> {
for item in self.into_iter() {
ops.extend(item.flatten(label_num)?);
}
Ok(ops)
labels_to_skips(ops)
}
}
@@ -66,25 +67,32 @@ impl Flatten for Routine {
let skip_label = Label::Numbered(label_num.fetch_add(1, Ordering::Relaxed));
let mut ops : Vec<Op> = vec![
BuiltinOp::FarJump(skip_label.clone()).into(),
BuiltinOp::Barrier(Some(format!("Routine \"{}\" start", self.name).into())).into(),
BuiltinOp::Barrier {
kind: Barrier::Open(skip_label.clone()),
msg: Some(format!("proc {} start", self.name).into())
}.into(),
BuiltinOp::Routine(self.name.clone()).into(),
];
ops.extend(self.body.flatten(label_num)?);
ops.push(BuiltinOp::Barrier(Some(format!("Routine \"{}\" end", self.name).into())).into());
ops.push(BuiltinOp::FarLabel(skip_label).into());
ops.push(
BuiltinOp::Barrier {
kind: Barrier::Close(skip_label.clone()),
msg: Some(format!("proc {} end", self.name).into())
}.into()
);
numbered_labels_to_skips(ops)
labels_to_skips(ops)
}
}
/// Convert jumps to relative skips
fn numbered_labels_to_skips(ops: Vec<Op>) -> Result<Vec<Op>, CrsnError> {
pub fn labels_to_skips(ops: Vec<Op>) -> Result<Vec<Op>, CrsnError> {
let mut label_positions = HashMap::<Label, usize>::new();
for (n, op) in ops.iter().enumerate() {
if let Op::BuiltIn(BuiltinOp::Label(name @ Label::Numbered(_))) = op {
if let Op::BuiltIn(BuiltinOp::Label(name)) = op {
label_positions.insert(name.clone(), n - label_positions.len());
}
}
@@ -93,10 +101,10 @@ fn numbered_labels_to_skips(ops: Vec<Op>) -> Result<Vec<Op>, CrsnError> {
let mut skipped = 0;
for (n, op) in ops.into_iter().enumerate() {
match op {
Op::BuiltIn(BuiltinOp::Label(Label::Numbered(_))) => {
Op::BuiltIn(BuiltinOp::Label(_)) => {
skipped += 1;
}
Op::BuiltIn(BuiltinOp::Jump(target @ Label::Numbered(_))) => {
Op::BuiltIn(BuiltinOp::Jump(target)) => {
if let Some(dest) = label_positions.get(&target) {
let skip = *dest as isize - n as isize + skipped;
cleaned.push(Op::BuiltIn(BuiltinOp::Skip(Rd::new(RdData::Immediate(skip as Value)))));
@@ -104,7 +112,7 @@ fn numbered_labels_to_skips(ops: Vec<Op>) -> Result<Vec<Op>, CrsnError> {
return Err(CrsnError::Asm(AsmError::LabelNotDefined(target)));
}
}
Op::BuiltIn(BuiltinOp::JumpIf(cond, target @ Label::Numbered(_))) => {
Op::BuiltIn(BuiltinOp::JumpIf(cond, target)) => {
if let Some(dest) = label_positions.get(&target) {
let skip = *dest as isize - n as isize + skipped;
cleaned.push(Op::BuiltIn(BuiltinOp::SkipIf(cond, Rd::new(RdData::Immediate(skip as Value)))));
crsn/src/asm/mod.rs
+1 -1
View File
@@ -30,5 +30,5 @@ pub fn assemble(source: &str, parsers: Arc<Vec<Box<dyn CrsnExtension>>>) -> Resu
}
trace!("------------------------");
Ok(Program::new(ops, parsers))
Ok(Program::new(ops, parsers)?)
}
crsn/src/builtin/defs.rs
+19 -6
View File
@@ -2,9 +2,19 @@ use crate::asm::data::{Rd, RdObj, Wr};
use crate::asm::data::literal::{DebugMsg, Label, RoutineName};
use crate::asm::instr::{Cond, Op};
#[derive(Debug)]
pub enum Barrier {
/// Barrier that logically opens a section that cannot be jumped into, typically a routine
Open(Label),
/// Closing counterpart to the Open barrier
Close(Label),
/// Stand-alone barrier
Standalone
}
#[derive(Debug)]
pub enum BuiltinOp {
/// Do nothing
/// Do nothing (costs one cycle)
Nop,
/// Stop execution
Halt,
@@ -31,17 +41,20 @@ pub enum BuiltinOp {
/// Exit the current routine with return values
Ret(Vec<Rd>),
/// Mark a routine entry point (call target).
/// Kept in the low level instruction file for position-independent code
/// The RoutineName struct includes its arity
Routine(RoutineName),
/// Skip backward or forward
/// Skip backward or forward. The skip count can be defined by an argument.
Skip(Rd),
/// Skip if a flag is set
SkipIf(Cond, Rd),
/// Deny jumps, skips and run across this address, producing a run-time fault with a message.
Barrier(Option<DebugMsg>),
/// Deny jumps, skips and run across this address, producing a run-time fault.
Barrier {
kind: Barrier,
msg: Option<DebugMsg>
},
/// Generate a run-time fault with a debugger message
Fault(Option<DebugMsg>),
/// Deallocate an object.
/// Deallocate an extension object.
/// The object is released and the handle becomes invalid.
Drop(RdObj),
/// Copy value
crsn/src/builtin/exec.rs
+39 -21
View File
@@ -3,7 +3,7 @@ use std::time::Duration;
use crate::asm::data::{Rd, RdData};
use crate::asm::data::literal::Addr;
use crate::asm::instr::Cond;
use crate::builtin::defs::BuiltinOp;
use crate::builtin::defs::{BuiltinOp, Barrier};
use crate::module::{EvalRes, OpTrait};
use crate::runtime::fault::Fault;
use crate::runtime::frame::StackFrame;
@@ -23,8 +23,24 @@ impl OpTrait for BuiltinOp {
/* this is nop, but without any cost - just markers */
res.cycles = 0;
}
BuiltinOp::Barrier(msg) => {
return Err(Fault::Barrier {
BuiltinOp::Barrier {
kind: Barrier::Open(lbl),
..
} => {
match program.find_far_label(lbl) {
Ok(pos) => {
res.cycles = 0;
state.set_pc(pos);
}
Err(e) => {
return Err(e);
}
}
}
BuiltinOp::Barrier {
msg, ..
} => {
return Err(Fault::FaultInstr {
msg: msg.clone().unwrap_or_else(|| "BARRIER".into())
});
}
@@ -44,26 +60,28 @@ impl OpTrait for BuiltinOp {
}
}
BuiltinOp::Jump(name) => {
match program.find_local_label(state.get_pc(), name) {
Ok(pos) => {
state.set_pc(pos);
}
Err(e) => {
return Err(e);
}
}
unimplemented!()
// match program.find_local_label(state.get_pc(), name) {
// Ok(pos) => {
// state.set_pc(pos);
// }
// Err(e) => {
// return Err(e);
// }
// }
}
BuiltinOp::JumpIf(cond, name) => {
if state.test_cond(*cond) {
match program.find_local_label(state.get_pc(), name) {
Ok(pos) => {
state.set_pc(pos);
}
Err(e) => {
return Err(e);
}
}
}
unimplemented!()
// if state.test_cond(*cond) {
// match program.find_local_label(state.get_pc(), name) {
// Ok(pos) => {
// state.set_pc(pos);
// }
// Err(e) => {
// return Err(e);
// }
// }
// }
}
BuiltinOp::FarJumpIf(cond, name) => {
if state.test_cond(*cond) {
crsn/src/builtin/parse.rs
+6 -3
View File
@@ -8,7 +8,7 @@ use crate::asm::instr::Op;
use crate::asm::parse::arg_parser::TokenParser;
use crate::asm::parse::parse_data::{parse_constant_name, parse_label, parse_rd, parse_reg_alias, parse_value};
use crate::asm::parse::sexp_expect::expect_string_atom;
use crate::builtin::defs::BuiltinOp;
use crate::builtin::defs::{BuiltinOp, Barrier};
use crate::module::{CrsnExtension, ParseRes};
#[derive(Debug, Clone)]
@@ -167,10 +167,13 @@ impl CrsnExtension for BuiltinOps {
}
"barrier" => {
BuiltinOp::Barrier(match args.next() {
BuiltinOp::Barrier {
kind: Barrier::Standalone,
msg: match args.next() {
None => None,
Some(s) => Some(expect_string_atom(Some(s))?.into()),
})
}
}
}
"fault" => {
crsn/src/runtime/program.rs
+64 -44
View File
@@ -3,7 +3,7 @@ use std::sync::Arc;
use crate::asm::data::literal::{Addr, Label, RoutineName};
use crate::asm::instr::Op;
use crate::builtin::defs::BuiltinOp;
use crate::builtin::defs::{BuiltinOp, Barrier};
use crate::module::CrsnExtension;
use crate::runtime::fault::Fault;
@@ -12,25 +12,30 @@ pub struct Program {
pub ops: Vec<Op>,
pub extensions: Arc<Vec<Box<dyn CrsnExtension>>>,
routines: HashMap<RoutineName, Addr>,
local_labels: HashMap<Label, Addr>,
far_labels: HashMap<Label, Addr>,
barriers: Vec<Addr>,
/// Barriers from-to (inclusive).
/// Standalone barriers have both addresses the same.
barriers: Vec<(Addr, Addr)>,
}
impl Program {
pub fn new(ops: Vec<Op>, extensions: Arc<Vec<Box<dyn CrsnExtension>>>) -> Arc<Self> {
pub fn new(ops: Vec<Op>, extensions: Arc<Vec<Box<dyn CrsnExtension>>>) -> anyhow::Result<Arc<Self>> {
let mut p = Self {
ops,
extensions,
routines: Default::default(),
local_labels: Default::default(),
far_labels: Default::default(),
barriers: Default::default(),
};
p.scan();
Arc::new(p)
p.scan()?;
Ok(Arc::new(p))
}
/// Find all the named things
fn scan(&mut self) {
fn scan(&mut self) -> anyhow::Result<()> {
let mut barrier_starts : HashMap<&Label, Addr> = HashMap::new();
for (pos, op) in self.ops.iter().enumerate() {
match op {
Op::BuiltIn(BuiltinOp::FarLabel(name)) => {
@@ -39,12 +44,45 @@ impl Program {
Op::BuiltIn(BuiltinOp::Routine(name)) => {
self.routines.insert(name.clone(), pos.into());
}
Op::BuiltIn(BuiltinOp::Barrier(_)) => {
self.barriers.push(pos.into());
Op::BuiltIn(
BuiltinOp::Barrier {
kind: Barrier::Open(lbl), ..
}
) => {
barrier_starts.insert(lbl, pos.into());
}
Op::BuiltIn(
BuiltinOp::Barrier {
kind: Barrier::Close(lbl),
msg,
}
) => {
if let Some(start_pos) = barrier_starts.remove(lbl) {
self.barriers.push((start_pos, pos.into()));
self.far_labels.insert(lbl.clone(), pos.into());
} else {
anyhow::bail!("Block barrier \"{:?}\" closed without being open!", msg);
}
}
Op::BuiltIn(
BuiltinOp::Barrier {
kind: Barrier::Standalone,
..
}
) => {
self.barriers.push((pos.into(), pos.into()));
}
_ => {}
}
}
if !barrier_starts.is_empty() {
anyhow::bail!("Some block barriers open without being closed!");
}
debug!("Program scanned: {:?}", self);
Ok(())
}
/// Read a program instruction at address
@@ -62,16 +100,30 @@ impl Program {
std::mem::swap(&mut from, &mut to);
}
for b in &self.barriers {
if *b >= from && *b <= to {
if let Op::BuiltIn(BuiltinOp::Barrier(msg)) = self.read(*b) {
for (b0, b1) in &self.barriers {
if b0 != b1 {
// block barrier that only partially intersects the jump
if (*b0 >= from && *b0 <= to) != (*b1 >= from && *b1 <= to) {
if let Op::BuiltIn(BuiltinOp::Barrier { msg, .. }) = self.read(*b0) {
return Err(Fault::JumpThroughBarrier {
msg: msg.clone().unwrap_or("No msg".into())
msg: msg.clone().unwrap_or("BLOCK BARRIER".into())
});
} else {
unreachable!();
}
}
} else {
// point barrier
if *b0 >= from && *b0 <= to {
if let Op::BuiltIn(BuiltinOp::Barrier { msg, .. }) = self.read(*b0) {
return Err(Fault::JumpThroughBarrier {
msg: msg.clone().unwrap_or("POINT BARRIER".into())
});
} else {
unreachable!();
}
}
}
}
Ok(())
}
@@ -87,37 +139,5 @@ impl Program {
self.far_labels.get(name).copied()
.ok_or_else(|| Fault::NoSuchLabel { label: name.clone() })
}
/// Find local label by name (label within a boundary-delimited region).
/// If more than one such label exists, the outcome is undefined.
pub fn find_local_label(&self, pc: Addr, name: &Label) -> Result<Addr, Fault> {
// TODO more efficient impl with look-up
for at in (0..=pc.0).rev() {
match &self.ops[at as usize] {
Op::BuiltIn(BuiltinOp::Label(lbl)) if lbl == name => {
return Ok(at.into());
}
Op::BuiltIn(BuiltinOp::Barrier(_)) => {
break;
}
_ => {}
}
}
for at in pc.0..(self.ops.len() as u64) {
match &self.ops[at as usize] {
Op::BuiltIn(BuiltinOp::Label(lbl)) if lbl == name => {
return Ok(at.into());
}
Op::BuiltIn(BuiltinOp::Barrier(_)) => {
break;
}
_ => {}
}
}
Err(Fault::NoSuchLabel { label: name.clone() })
}
}
crsn/src/runtime/run_thread/state.rs
+1
View File
@@ -42,6 +42,7 @@ impl RunState {
/// Set program counter - address of the next instruction to run
pub fn set_pc(&mut self, pc: Addr) {
trace!("PC := {}", pc);
self.frame.pc = pc;
}
examples/proc_skip.csn
+13
View File
@@ -1,11 +1,24 @@
(
(:label)
(ld r0 1)
; the procedure is surrounded by a jump and a label
(proc foo
(:label)
(nop)
(j :label)
(ret)
)
(proc bar
(:label)
(nop)
(j :label)
(ret)
)
(ld r0 2)
(halt)
(j :label)
)
launcher/src/main.rs
+36 -8
View File
@@ -13,8 +13,10 @@ use crsn::runtime::run_thread::{RunThread, ThreadToken};
use crsn_arith::ArithOps;
use crsn_screen::ScreenOps;
use crsn_stacks::StackOps;
use std::time::Duration;
mod read_file;
mod serde_duration_millis;
#[derive(Debug, Clone, Serialize, Deserialize)]
struct LogConfig {
@@ -23,10 +25,13 @@ struct LogConfig {
}
#[derive(Debug, Clone, Serialize, Deserialize)]
#[serde(default)]
struct Config {
log: LogConfig,
#[serde(skip)]
program_file: String,
#[serde(with="serde_duration_millis")]
cycle_time: Duration,
}
impl Default for Config {
@@ -37,6 +42,7 @@ impl Default for Config {
modules: Default::default(),
},
program_file: "".to_string(),
cycle_time: Duration::default(),
}
}
}
@@ -55,17 +61,43 @@ impl AppConfig for Config {
/// Add args to later use in the `configure` method.
fn add_args<'a: 'b, 'b>(clap: clap::App<'a, 'b>) -> clap::App<'a, 'b> {
// Default impl
clap.arg(
clap
.arg(
clap::Arg::with_name("input")
.value_name("FILE")
.help("Program to run")
.required_unless("default-config")
.takes_value(true),
)
.arg(
clap::Arg::with_name("cycle")
.long("cycle")
.short("C")
.value_name("MILLIS")
.help("Cycle time (ms)")
.validator(|s| {
let t = s.trim();
if t.is_empty() {
Err("cycle time requires an argument".into())
} else {
if t.chars()
.find(|c| !c.is_ascii_digit())
.is_some() {
Err("cycle time requires an integer number".into())
} else {
Ok(())
}
}
})
.takes_value(true),
)
}
fn configure(mut self, clap: &ArgMatches) -> anyhow::Result<Self> {
self.program_file = clap.value_of("input").unwrap().to_string();
if let Some(c) = clap.value_of("cycle") {
self.cycle_time = Duration::from_millis(c.parse().unwrap());
}
Ok(self)
}
}
@@ -88,13 +120,9 @@ fn main() -> anyhow::Result<()> {
info!("Start runtime");
let thread = RunThread::new(
ThreadToken(0),
None,
parsed.clone(),
Addr(0), // TODO find "main"?
&[], // TODO from CLI?
);
let args = &[];
let mut thread = RunThread::new(ThreadToken(0), None, parsed.clone(), Addr(0), args);
thread.set_speed(config.cycle_time);
let a = thread.start();
// ...
launcher/src/serde_duration_millis.rs
+17
View File
@@ -0,0 +1,17 @@
use serde::{self, Deserialize, Deserializer, Serializer};
use std::time::Duration;
pub fn serialize<S>(value: &Duration, se: S) -> Result<S::Ok, S::Error>
where
S: Serializer,
{
se.serialize_u64(value.as_secs() * 1000 + value.subsec_millis() as u64)
}
pub fn deserialize<'de, D>(de: D) -> Result<Duration, D::Error>
where
D: Deserializer<'de>,
{
let s: u64 = u64::deserialize(de)?;
Ok(Duration::from_millis(s))
}