This commit is contained in:
Erin 2023-07-10 23:18:23 +02:00
parent e700010e7f
commit b4dac1245b
4 changed files with 388 additions and 259 deletions

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@ -1,277 +1,57 @@
#![no_std]
#![feature(error_in_core)]
// use std::collections::HashMap;
extern crate alloc;
use alloc::vec::Vec;
use {
core::fmt::{Display, Formatter},
hashbrown::HashMap,
lasso::{Rodeo, Spur},
logos::{Lexer, Logos, Span},
};
pub mod text;
macro_rules! tokendef {
($($opcode:literal),* $(,)?) => {
paste::paste! {
#[derive(Clone, Copy, Debug, PartialEq, Eq, Logos)]
#[logos(extras = Rodeo)]
#[logos(skip r"[ \t\f]+")]
#[logos(skip r"-- .*")]
pub enum Token {
$(#[token($opcode, |_| hbbytecode::opcode::[<$opcode:upper>])])*
OpCode(u8),
mod macros;
#[regex("[0-9]+", |l| l.slice().parse().ok())]
#[regex(
"-[0-9]+",
|lexer| {
Some(u64::from_ne_bytes(lexer.slice().parse::<i64>().ok()?.to_ne_bytes()))
},
)] Integer(u64),
use {alloc::vec::Vec, hashbrown::HashSet};
#[regex(
"r[0-9]+",
|lexer| match lexer.slice()[1..].parse() {
Ok(n) => Some(n),
_ => None
},
)] Register(u8),
#[regex(
r"\p{XID_Start}\p{XID_Continue}*:",
|lexer| lexer.extras.get_or_intern(&lexer.slice()[..lexer.slice().len() - 1]),
)] Label(Spur),
#[regex(
r"\p{XID_Start}\p{XID_Continue}*",
|lexer| lexer.extras.get_or_intern(lexer.slice()),
)] Symbol(Spur),
#[token("\n")]
#[token(";")] ISep,
#[token(",")] PSep,
}
}
};
#[derive(Default)]
pub struct Assembler {
pub buf: Vec<u8>,
sub: HashSet<usize>,
}
#[rustfmt::skip]
tokendef![
"nop", "add", "sub", "mul", "and", "or", "xor", "sl", "sr", "srs", "cmp", "cmpu",
"dir", "neg", "not", "addi", "muli", "andi", "ori", "xori", "sli", "sri", "srsi",
"cmpi", "cmpui", "cp", "swa", "li", "ld", "st", "bmc", "brc", "jmp", "jeq", "jne",
"jlt", "jgt", "jltu", "jgtu", "ecall", "addf", "subf", "mulf", "dirf", "fmaf", "negf",
"itf", "fti", "addfi", "mulfi",
];
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum ErrorKind {
UnexpectedToken,
InvalidToken,
UnexpectedEnd,
InvalidSymbol,
impl Assembler {
macros::impl_asm!(
bbbb(p0: u8, p1: u8, p2: u8, p3: u8)
=> [DIR, DIRF],
bbb(p0: u8, p1: u8, p2: u8)
=> [ADD, SUB, MUL, AND, OR, XOR, SL, SRS, CMP, CMPU, BRC, ADDF, MULF],
bbdh(p0: u8, p1: u8, p2: impl Imm, p3: u16)
=> [LD, ST],
bbd(p0: u8, p1: u8, p2: impl Imm)
=> [ADDI, MULI, ANDI, ORI, XORI, SLI, SRI, SRSI, CMPI, CMPUI,
JEQ, JNE, JLT, JGT, JLTU, JGTU, ADDFI, MULFI],
bb(p0: u8, p1: u8)
=> [NEG, NOT, CP, SWA],
bd(p0: u8, p1: impl Imm)
=> [LI, JMP],
n()
=> [NOP, ECALL],
);
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Error {
pub kind: ErrorKind,
pub span: Span,
pub trait Imm {
fn insert(self, asm: &mut Assembler);
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
write!(f, "Error {:?} at {:?}", self.kind, self.span)
impl Imm for u64 {
#[inline(always)]
fn insert(self, asm: &mut Assembler) {
asm.buf.extend(self.to_le_bytes());
}
}
impl core::error::Error for Error {}
macro_rules! expect_matches {
($self:expr, $($pat:pat),* $(,)?) => {$(
let $pat = $self.next()?
else { return Err(ErrorKind::UnexpectedToken) };
)*}
}
pub fn assembly(code: &str, buf: &mut Vec<u8>) -> Result<(), Error> {
struct Assembler<'a> {
lexer: Lexer<'a, Token>,
buf: &'a mut Vec<u8>,
label_map: HashMap<Spur, u64>,
to_sub_label: HashMap<usize, Spur>,
#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub struct Symbol(pub u64);
impl Imm for Symbol {
#[inline(always)]
fn insert(self, asm: &mut Assembler) {
asm.sub.insert(asm.buf.len());
asm.buf.extend(self.0.to_le_bytes());
}
impl<'a> Assembler<'a> {
fn next(&mut self) -> Result<Token, ErrorKind> {
match self.lexer.next() {
Some(Ok(t)) => Ok(t),
Some(Err(())) => Err(ErrorKind::InvalidToken),
None => Err(ErrorKind::UnexpectedEnd),
}
}
fn assemble(&mut self) -> Result<(), ErrorKind> {
use hbbytecode::opcode::*;
loop {
match self.lexer.next() {
Some(Ok(Token::OpCode(op))) => {
self.buf.push(op);
match op {
NOP | ECALL => Ok(()),
DIR | DIRF => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Register(r2),
Token::PSep,
Token::Register(r3),
);
self.buf.extend([r0, r1, r2, r3]);
Ok(())
}
ADD..=CMPU | ADDF..=MULF => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Register(r2),
);
self.buf.extend([r0, r1, r2]);
Ok(())
}
BRC => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Integer(count),
);
self.buf.extend([
r0,
r1,
u8::try_from(count).map_err(|_| ErrorKind::UnexpectedToken)?,
]);
Ok(())
}
NEG..=NOT | CP..=SWA | NEGF..=FTI => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
);
self.buf.extend([r0, r1]);
Ok(())
}
LI | JMP => {
expect_matches!(self, Token::Register(r0), Token::PSep);
self.buf.push(r0);
self.insert_imm()?;
Ok(())
}
ADDI..=CMPUI | BMC | JEQ..=JGTU | ADDFI..=MULFI => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
);
self.buf.extend([r0, r1]);
self.insert_imm()?;
Ok(())
}
LD..=ST => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Integer(offset),
Token::PSep,
Token::Integer(len),
);
self.buf.extend([r0, r1]);
self.buf.extend(offset.to_le_bytes());
self.buf.extend(
u16::try_from(len)
.map_err(|_| ErrorKind::InvalidToken)?
.to_le_bytes(),
);
Ok(())
}
_ => unreachable!(),
}?;
match self.next() {
Ok(Token::ISep) => (),
Ok(_) => return Err(ErrorKind::UnexpectedToken),
Err(ErrorKind::UnexpectedEnd) => return Ok(()),
Err(e) => return Err(e),
}
}
Some(Ok(Token::Label(lbl))) => {
self.label_map.insert(lbl, self.buf.len() as u64);
}
Some(Ok(Token::ISep)) => (),
Some(Ok(_)) => return Err(ErrorKind::UnexpectedToken),
Some(Err(())) => return Err(ErrorKind::InvalidToken),
None => return Ok(()),
}
}
}
fn link_local_syms(&mut self) -> Result<(), ErrorKind> {
for (ix, sym) in &self.to_sub_label {
self.label_map
.get(sym)
.ok_or(ErrorKind::InvalidSymbol)?
.to_le_bytes()
.iter()
.enumerate()
.for_each(|(i, b)| {
self.buf[ix + i] = *b;
});
}
Ok(())
}
fn insert_imm(&mut self) -> Result<(), ErrorKind> {
let imm = match self.next()? {
Token::Integer(i) => i.to_le_bytes(),
Token::Symbol(s) => {
self.to_sub_label.insert(self.buf.len(), s);
[0; 8]
}
_ => return Err(ErrorKind::UnexpectedToken),
};
self.buf.extend(imm);
Ok(())
}
}
let mut asm = Assembler {
lexer: Token::lexer(code),
label_map: Default::default(),
to_sub_label: Default::default(),
buf,
};
asm.assemble().map_err(|kind| Error {
kind,
span: asm.lexer.span(),
})?;
asm.link_local_syms()
.map_err(|kind| Error { kind, span: 0..0 })
}

73
hbasm/src/macros.rs Normal file
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@ -0,0 +1,73 @@
macro_rules! impl_asm_opcodes {
(
$generic:ident
($($param_i:ident: $param_ty:ty),*)
=> []
) => {};
(
$generic:ident
($($param_i:ident: $param_ty:ty),*)
=> [$opcode:ident, $($rest:tt)*]
) => {
paste::paste! {
#[allow(dead_code)]
#[inline(always)]
pub fn [<i_ $opcode:lower>](&mut self, $($param_i: $param_ty),*) {
self.$generic(hbbytecode::opcode::$opcode, $($param_i),*)
}
}
macros::impl_asm_opcodes!(
$generic($($param_i: $param_ty),*)
=> [$($rest)*]
);
};
}
macro_rules! gen_impl_asm_insert {
($($ty:ident),* $(,)?) => {
macro_rules! impl_asm_insert {
$(($self:expr, $id:ident, $ty) => {
$self.buf.extend($id.to_le_bytes())
};)*
($self:expr, $id:ident, $_:ty) => {
Imm::insert($id, $self)
};
}
};
}
gen_impl_asm_insert!(u8, u16, u64);
macro_rules! impl_asm {
(
$(
$ityn:ident
($($param_i:ident: $param_ty:ty),* $(,)?)
=> [$($opcode:ident),* $(,)?],
)*
) => {
paste::paste! {
$(
#[allow(dead_code)]
fn [<i_param_ $ityn>](&mut self, opcode: u8, $($param_i: $param_ty),*) {
self.buf.push(opcode);
$(macros::impl_asm_insert!(self, $param_i, $param_ty);)*
}
macros::impl_asm_opcodes!(
[<i_param_ $ityn>]($($param_i: $param_ty),*)
=> [$($opcode,)*]
);
)*
}
};
}
pub(super) use {impl_asm, impl_asm_opcodes};
#[allow(clippy::single_component_path_imports)]
pub(super) use impl_asm_insert;

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@ -8,7 +8,7 @@ fn main() -> Result<(), Box<dyn Error>> {
stdin().read_to_string(&mut code)?;
let mut buf = vec![];
if let Err(e) = hbasm::assembly(&code, &mut buf) {
if let Err(e) = hbasm::text::assembly(&code, &mut buf) {
eprintln!(
"Error {:?} at {:?} (`{}`)",
e.kind,

276
hbasm/src/text.rs Normal file
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@ -0,0 +1,276 @@
// use std::collections::HashMap;
extern crate alloc;
use alloc::vec::Vec;
use {
core::fmt::{Display, Formatter},
hashbrown::HashMap,
lasso::{Rodeo, Spur},
logos::{Lexer, Logos, Span},
};
macro_rules! tokendef {
($($opcode:literal),* $(,)?) => {
paste::paste! {
#[derive(Clone, Copy, Debug, PartialEq, Eq, Logos)]
#[logos(extras = Rodeo)]
#[logos(skip r"[ \t\f]+")]
#[logos(skip r"-- .*")]
pub enum Token {
$(#[token($opcode, |_| hbbytecode::opcode::[<$opcode:upper>])])*
OpCode(u8),
#[regex("[0-9]+", |l| l.slice().parse().ok())]
#[regex(
"-[0-9]+",
|lexer| {
Some(u64::from_ne_bytes(lexer.slice().parse::<i64>().ok()?.to_ne_bytes()))
},
)] Integer(u64),
#[regex(
"r[0-9]+",
|lexer| match lexer.slice()[1..].parse() {
Ok(n) => Some(n),
_ => None
},
)] Register(u8),
#[regex(
r"\p{XID_Start}\p{XID_Continue}*:",
|lexer| lexer.extras.get_or_intern(&lexer.slice()[..lexer.slice().len() - 1]),
)] Label(Spur),
#[regex(
r"\p{XID_Start}\p{XID_Continue}*",
|lexer| lexer.extras.get_or_intern(lexer.slice()),
)] Symbol(Spur),
#[token("\n")]
#[token(";")] ISep,
#[token(",")] PSep,
}
}
};
}
#[rustfmt::skip]
tokendef![
"nop", "add", "sub", "mul", "and", "or", "xor", "sl", "sr", "srs", "cmp", "cmpu",
"dir", "neg", "not", "addi", "muli", "andi", "ori", "xori", "sli", "sri", "srsi",
"cmpi", "cmpui", "cp", "swa", "li", "ld", "st", "bmc", "brc", "jmp", "jeq", "jne",
"jlt", "jgt", "jltu", "jgtu", "ecall", "addf", "subf", "mulf", "dirf", "fmaf", "negf",
"itf", "fti", "addfi", "mulfi",
];
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum ErrorKind {
UnexpectedToken,
InvalidToken,
UnexpectedEnd,
InvalidSymbol,
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub struct Error {
pub kind: ErrorKind,
pub span: Span,
}
impl Display for Error {
fn fmt(&self, f: &mut Formatter<'_>) -> core::fmt::Result {
write!(f, "Error {:?} at {:?}", self.kind, self.span)
}
}
impl core::error::Error for Error {}
macro_rules! expect_matches {
($self:expr, $($pat:pat),* $(,)?) => {$(
let $pat = $self.next()?
else { return Err(ErrorKind::UnexpectedToken) };
)*}
}
pub fn assembly(code: &str, buf: &mut Vec<u8>) -> Result<(), Error> {
struct Assembler<'a> {
lexer: Lexer<'a, Token>,
buf: &'a mut Vec<u8>,
label_map: HashMap<Spur, u64>,
to_sub_label: HashMap<usize, Spur>,
}
impl<'a> Assembler<'a> {
fn next(&mut self) -> Result<Token, ErrorKind> {
match self.lexer.next() {
Some(Ok(t)) => Ok(t),
Some(Err(())) => Err(ErrorKind::InvalidToken),
None => Err(ErrorKind::UnexpectedEnd),
}
}
fn assemble(&mut self) -> Result<(), ErrorKind> {
use hbbytecode::opcode::*;
loop {
match self.lexer.next() {
Some(Ok(Token::OpCode(op))) => {
self.buf.push(op);
match op {
NOP | ECALL => Ok(()),
DIR | DIRF => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Register(r2),
Token::PSep,
Token::Register(r3),
);
self.buf.extend([r0, r1, r2, r3]);
Ok(())
}
ADD..=CMPU | ADDF..=MULF => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Register(r2),
);
self.buf.extend([r0, r1, r2]);
Ok(())
}
BRC => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Integer(count),
);
self.buf.extend([
r0,
r1,
u8::try_from(count).map_err(|_| ErrorKind::UnexpectedToken)?,
]);
Ok(())
}
NEG..=NOT | CP..=SWA | NEGF..=FTI => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
);
self.buf.extend([r0, r1]);
Ok(())
}
LI | JMP => {
expect_matches!(self, Token::Register(r0), Token::PSep);
self.buf.push(r0);
self.insert_imm()?;
Ok(())
}
ADDI..=CMPUI | BMC | JEQ..=JGTU | ADDFI..=MULFI => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
);
self.buf.extend([r0, r1]);
self.insert_imm()?;
Ok(())
}
LD..=ST => {
expect_matches!(
self,
Token::Register(r0),
Token::PSep,
Token::Register(r1),
Token::PSep,
Token::Integer(offset),
Token::PSep,
Token::Integer(len),
);
self.buf.extend([r0, r1]);
self.buf.extend(offset.to_le_bytes());
self.buf.extend(
u16::try_from(len)
.map_err(|_| ErrorKind::InvalidToken)?
.to_le_bytes(),
);
Ok(())
}
_ => unreachable!(),
}?;
match self.next() {
Ok(Token::ISep) => (),
Ok(_) => return Err(ErrorKind::UnexpectedToken),
Err(ErrorKind::UnexpectedEnd) => return Ok(()),
Err(e) => return Err(e),
}
}
Some(Ok(Token::Label(lbl))) => {
self.label_map.insert(lbl, self.buf.len() as u64);
}
Some(Ok(Token::ISep)) => (),
Some(Ok(_)) => return Err(ErrorKind::UnexpectedToken),
Some(Err(())) => return Err(ErrorKind::InvalidToken),
None => return Ok(()),
}
}
}
fn link_local_syms(&mut self) -> Result<(), ErrorKind> {
for (ix, sym) in &self.to_sub_label {
self.label_map
.get(sym)
.ok_or(ErrorKind::InvalidSymbol)?
.to_le_bytes()
.iter()
.enumerate()
.for_each(|(i, b)| {
self.buf[ix + i] = *b;
});
}
Ok(())
}
fn insert_imm(&mut self) -> Result<(), ErrorKind> {
let imm = match self.next()? {
Token::Integer(i) => i.to_le_bytes(),
Token::Symbol(s) => {
self.to_sub_label.insert(self.buf.len(), s);
[0; 8]
}
_ => return Err(ErrorKind::UnexpectedToken),
};
self.buf.extend(imm);
Ok(())
}
}
let mut asm = Assembler {
lexer: Token::lexer(code),
label_map: Default::default(),
to_sub_label: Default::default(),
buf,
};
asm.assemble().map_err(|kind| Error {
kind,
span: asm.lexer.span(),
})?;
asm.link_local_syms()
.map_err(|kind| Error { kind, span: 0..0 })
}