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holey-bytes/lang/src/son/hbvm.rs

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moving hbvm related code into one file
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use {
cleanup
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super::{ItemCtx, Nid, Nodes, Pool, RallocBRef, Regalloc, ARG_START, NEVER, VOID},
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crate::{
lexer::TokenKind,
parser, reg,
son::{write_reloc, Kind, MEM},
task,
ty::{self, Arg, Loc},
microoptimizing bitset
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utils::{BitSet, Vc},
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HashMap, Offset, PLoc, Reloc, Sig, Size, TypedReloc, Types,
},
some start for homemade regalloc
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alloc::{borrow::ToOwned, boxed::Box, collections::BTreeMap, string::String, vec::Vec},
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core::{assert_matches::debug_assert_matches, mem},
hbbytecode::{self as instrs, *},
};
impl Types {
pub fn assemble(&mut self, to: &mut Vec<u8>) {
to.extend([0u8; HEADER_SIZE]);
binary_prelude(to);
let exe = self.dump_reachable(0, to);
Reloc::new(HEADER_SIZE, 3, 4).apply_jump(to, self.ins.funcs[0].offset, 0);
unsafe { *to.as_mut_ptr().cast::<AbleOsExecutableHeader>() = exe }
}
pub fn dump_reachable(&mut self, from: ty::Func, to: &mut Vec<u8>) -> AbleOsExecutableHeader {
debug_assert!(self.tmp.frontier.is_empty());
debug_assert!(self.tmp.funcs.is_empty());
debug_assert!(self.tmp.globals.is_empty());
self.tmp.frontier.push(ty::Kind::Func(from).compress());
while let Some(itm) = self.tmp.frontier.pop() {
match itm.expand() {
ty::Kind::Func(func) => {
let fuc = &mut self.ins.funcs[func as usize];
if task::is_done(fuc.offset) {
continue;
}
fuc.offset = 0;
self.tmp.funcs.push(func);
self.tmp.frontier.extend(fuc.relocs.iter().map(|r| r.target));
}
ty::Kind::Global(glob) => {
let glb = &mut self.ins.globals[glob as usize];
if task::is_done(glb.offset) {
continue;
}
glb.offset = 0;
self.tmp.globals.push(glob);
}
_ => unreachable!(),
}
}
for &func in &self.tmp.funcs {
let fuc = &mut self.ins.funcs[func as usize];
fuc.offset = to.len() as _;
debug_assert!(!fuc.code.is_empty());
to.extend(&fuc.code);
}
let code_length = to.len();
for global in self.tmp.globals.drain(..) {
let global = &mut self.ins.globals[global as usize];
global.offset = to.len() as _;
to.extend(&global.data);
}
let data_length = to.len() - code_length;
for func in self.tmp.funcs.drain(..) {
let fuc = &self.ins.funcs[func as usize];
for rel in &fuc.relocs {
let offset = match rel.target.expand() {
ty::Kind::Func(fun) => self.ins.funcs[fun as usize].offset,
ty::Kind::Global(glo) => self.ins.globals[glo as usize].offset,
_ => unreachable!(),
};
rel.reloc.apply_jump(to, offset, fuc.offset);
}
}
AbleOsExecutableHeader {
magic_number: [0x15, 0x91, 0xD2],
executable_version: 0,
code_length: code_length.saturating_sub(HEADER_SIZE) as _,
data_length: data_length as _,
debug_length: 0,
config_length: 0,
metadata_length: 0,
}
}
pub fn disasm<'a>(
&'a self,
mut sluce: &[u8],
files: &'a [parser::Ast],
output: &mut String,
eca_handler: impl FnMut(&mut &[u8]),
) -> Result<(), hbbytecode::DisasmError<'a>> {
use hbbytecode::DisasmItem;
let functions = self
.ins
.funcs
.iter()
.filter(|f| task::is_done(f.offset))
.map(|f| {
let name = if f.file != u32::MAX {
let file = &files[f.file as usize];
file.ident_str(f.name)
} else {
"target_fn"
};
(f.offset, (name, f.code.len() as u32, DisasmItem::Func))
})
.chain(self.ins.globals.iter().filter(|g| task::is_done(g.offset)).map(|g| {
let name = if g.file == u32::MAX {
core::str::from_utf8(&g.data).unwrap_or("invalid utf-8")
} else {
let file = &files[g.file as usize];
file.ident_str(g.name)
};
(g.offset, (name, g.data.len() as Size, DisasmItem::Global))
}))
.collect::<BTreeMap<_, _>>();
hbbytecode::disasm(&mut sluce, &functions, output, eca_handler)
}
}
impl ItemCtx {
fn emit(&mut self, instr: (usize, [u8; instrs::MAX_SIZE])) {
emit(&mut self.code, instr);
}
fn emit_body_code(
&mut self,
sig: Sig,
tys: &Types,
files: &[parser::Ast],
ralloc: &mut Regalloc,
) -> usize {
let mut nodes = mem::take(&mut self.nodes);
let fuc = Function::new(&mut nodes, tys, sig);
log::info!("{:?}", fuc);
if self.call_count != 0 {
mem::swap(
&mut ralloc.env.preferred_regs_by_class,
&mut ralloc.env.non_preferred_regs_by_class,
);
};
let options = regalloc2::RegallocOptions {
verbose_log: false,
validate_ssa: cfg!(debug_assertions),
algorithm: regalloc2::Algorithm::Ion,
};
regalloc2::run_with_ctx(&fuc, &ralloc.env, &options, &mut ralloc.ctx).unwrap_or_else(
|err| {
if let regalloc2::RegAllocError::SSA(vreg, inst) = err {
fuc.nodes[vreg.vreg() as Nid].lock_rc = Nid::MAX;
fuc.nodes[fuc.instrs[inst.index()].nid].lock_rc = Nid::MAX - 1;
}
fuc.nodes.graphviz_in_browser(tys, files);
panic!("{err}")
},
);
if self.call_count != 0 {
mem::swap(
&mut ralloc.env.preferred_regs_by_class,
&mut ralloc.env.non_preferred_regs_by_class,
);
};
let mut saved_regs = HashMap::<u8, u8>::default();
let mut atr = |allc: regalloc2::Allocation| {
debug_assert!(allc.is_reg());
let hvenc = regalloc2::PReg::from_index(allc.index()).hw_enc() as u8;
if hvenc <= 12 {
return hvenc;
}
let would_insert = saved_regs.len() as u8 + reg::RET_ADDR + 1;
*saved_regs.entry(hvenc).or_insert(would_insert)
};
let (retl, mut parama) = tys.parama(sig.ret);
let mut typs = sig.args.args();
let mut args = fuc.nodes[VOID].outputs[ARG_START..].iter();
while let Some(aty) = typs.next(tys) {
let Arg::Value(ty) = aty else { continue };
let Some(loc) = parama.next(ty, tys) else { continue };
let &arg = args.next().unwrap();
let (rg, size) = match loc {
PLoc::WideReg(rg, size) => (rg, size),
PLoc::Reg(rg, size) if ty.loc(tys) == Loc::Stack => (rg, size),
PLoc::Reg(..) | PLoc::Ref(..) => continue,
};
self.emit(instrs::st(rg, reg::STACK_PTR, fuc.nodes[arg].offset as _, size));
if fuc.nodes[arg].lock_rc == 0 {
self.emit(instrs::addi64(rg, reg::STACK_PTR, fuc.nodes[arg].offset as _));
}
}
for (i, block) in fuc.blocks.iter().enumerate() {
let blk = regalloc2::Block(i as _);
fuc.nodes[block.nid].offset = self.code.len() as _;
for instr_or_edit in ralloc.ctx.output.block_insts_and_edits(&fuc, blk) {
let inst = match instr_or_edit {
regalloc2::InstOrEdit::Inst(inst) => inst,
regalloc2::InstOrEdit::Edit(&regalloc2::Edit::Move { from, to }) => {
self.emit(instrs::cp(atr(to), atr(from)));
continue;
}
};
let nid = fuc.instrs[inst.index()].nid;
if nid == NEVER {
continue;
};
let allocs = ralloc.ctx.output.inst_allocs(inst);
let node = &fuc.nodes[nid];
let mut extend = |base: ty::Id, dest: ty::Id, from: usize, to: usize| {
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let (bsize, dsize) = (tys.size_of(base), tys.size_of(dest));
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debug_assert!(bsize <= 8, "{}", ty::Display::new(tys, files, base));
debug_assert!(dsize <= 8, "{}", ty::Display::new(tys, files, dest));
adding optional values
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if bsize == dsize {
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return Default::default();
}
match (base.is_signed(), dest.is_signed()) {
(true, true) => {
let op = [instrs::sxt8, instrs::sxt16, instrs::sxt32]
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[bsize.ilog2() as usize];
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op(atr(allocs[to]), atr(allocs[from]))
}
_ => {
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let mask = (1u64 << (bsize * 8)) - 1;
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instrs::andi(atr(allocs[to]), atr(allocs[from]), mask)
}
}
};
match node.kind {
Kind::If => {
let &[_, cnd] = node.inputs.as_slice() else { unreachable!() };
if let Kind::BinOp { op } = fuc.nodes[cnd].kind
&& let Some((op, swapped)) =
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op.cond_op(fuc.nodes[fuc.nodes[cnd].inputs[1]].ty)
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{
let &[lhs, rhs] = allocs else { unreachable!() };
let &[_, lh, rh] = fuc.nodes[cnd].inputs.as_slice() else {
unreachable!()
};
self.emit(extend(fuc.nodes[lh].ty, fuc.nodes[lh].ty.extend(), 0, 0));
self.emit(extend(fuc.nodes[rh].ty, fuc.nodes[rh].ty.extend(), 1, 1));
let rel = Reloc::new(self.code.len(), 3, 2);
self.jump_relocs.push((node.outputs[!swapped as usize], rel));
self.emit(op(atr(lhs), atr(rhs), 0));
} else {
self.emit(extend(fuc.nodes[cnd].ty, fuc.nodes[cnd].ty.extend(), 0, 0));
let rel = Reloc::new(self.code.len(), 3, 2);
self.jump_relocs.push((node.outputs[0], rel));
self.emit(instrs::jne(atr(allocs[0]), reg::ZERO, 0));
}
}
Kind::Loop | Kind::Region => {
if node.ralloc_backref as usize != i + 1 {
let rel = Reloc::new(self.code.len(), 1, 4);
self.jump_relocs.push((nid, rel));
self.emit(instrs::jmp(0));
}
}
Kind::Return => {
match retl {
Some(PLoc::Reg(r, size)) if sig.ret.loc(tys) == Loc::Stack => {
self.emit(instrs::ld(r, atr(allocs[0]), 0, size))
}
None | Some(PLoc::Reg(..)) => {}
Some(PLoc::WideReg(r, size)) => {
self.emit(instrs::ld(r, atr(allocs[0]), 0, size))
}
Some(PLoc::Ref(_, size)) => {
let [src, dst] = [atr(allocs[0]), atr(allocs[1])];
if let Ok(size) = u16::try_from(size) {
self.emit(instrs::bmc(src, dst, size));
} else {
for _ in 0..size / u16::MAX as u32 {
self.emit(instrs::bmc(src, dst, u16::MAX));
self.emit(instrs::addi64(src, src, u16::MAX as _));
self.emit(instrs::addi64(dst, dst, u16::MAX as _));
}
self.emit(instrs::bmc(src, dst, size as u16));
self.emit(instrs::addi64(src, src, size.wrapping_neg() as _));
self.emit(instrs::addi64(dst, dst, size.wrapping_neg() as _));
}
}
}
if i != fuc.blocks.len() - 1 {
let rel = Reloc::new(self.code.len(), 1, 4);
self.ret_relocs.push(rel);
self.emit(instrs::jmp(0));
}
}
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Kind::Die => {
self.emit(instrs::un());
}
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Kind::CInt { value } if node.ty.is_float() => {
self.emit(match node.ty {
ty::Id::F32 => instrs::li32(
atr(allocs[0]),
(f64::from_bits(value as _) as f32).to_bits(),
),
ty::Id::F64 => instrs::li64(atr(allocs[0]), value as _),
_ => unreachable!(),
});
}
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Kind::CInt { value } => self.emit(match tys.size_of(node.ty) {
1 => instrs::li8(atr(allocs[0]), value as _),
2 => instrs::li16(atr(allocs[0]), value as _),
4 => instrs::li32(atr(allocs[0]), value as _),
_ => instrs::li64(atr(allocs[0]), value as _),
}),
Kind::UnOp { op } => {
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let op = op
.unop(node.ty, fuc.nodes[node.inputs[1]].ty)
.expect("TODO: unary operator not supported");
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let &[dst, oper] = allocs else { unreachable!() };
self.emit(op(atr(dst), atr(oper)));
}
Kind::BinOp { .. } if node.lock_rc != 0 => {}
Kind::BinOp { op } => {
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let &[.., lh, rh] = node.inputs.as_slice() else { unreachable!() };
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adding floating point arithmetic
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if let Kind::CInt { value } = fuc.nodes[rh].kind
&& fuc.nodes[rh].lock_rc != 0
&& let Some(op) = op.imm_binop(node.ty)
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{
let &[dst, lhs] = allocs else { unreachable!() };
self.emit(op(atr(dst), atr(lhs), value as _));
} else if let Some(op) =
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op.binop(node.ty).or(op.float_cmp(fuc.nodes[lh].ty))
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{
let &[dst, lhs, rhs] = allocs else { unreachable!() };
self.emit(op(atr(dst), atr(lhs), atr(rhs)));
} else if let Some(against) = op.cmp_against() {
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let op_ty = fuc.nodes[lh].ty;
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self.emit(extend(fuc.nodes[lh].ty, fuc.nodes[lh].ty.extend(), 0, 0));
self.emit(extend(fuc.nodes[rh].ty, fuc.nodes[rh].ty.extend(), 1, 1));
let &[dst, lhs, rhs] = allocs else { unreachable!() };
adding floating point arithmetic
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if op_ty.is_float() && matches!(op, TokenKind::Le | TokenKind::Ge) {
let opop = match op {
TokenKind::Le => TokenKind::Gt,
TokenKind::Ge => TokenKind::Lt,
_ => unreachable!(),
};
let op_fn = opop.float_cmp(op_ty).unwrap();
self.emit(op_fn(atr(dst), atr(lhs), atr(rhs)));
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self.emit(instrs::not(atr(dst), atr(dst)));
adding floating point arithmetic
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} else if op_ty.is_integer() {
let op_fn =
if op_ty.is_signed() { instrs::cmps } else { instrs::cmpu };
self.emit(op_fn(atr(dst), atr(lhs), atr(rhs)));
self.emit(instrs::cmpui(atr(dst), atr(dst), against));
if matches!(op, TokenKind::Eq | TokenKind::Lt | TokenKind::Gt) {
self.emit(instrs::not(atr(dst), atr(dst)));
}
} else {
todo!("unhandled operator: {op}");
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}
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} else {
todo!("unhandled operator: {op}");
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}
}
Kind::Call { args, func } => {
let (ret, mut parama) = tys.parama(node.ty);
let has_ret = ret.is_some() as usize;
let mut args = args.args();
let mut allocs = allocs[has_ret..].iter();
while let Some(arg) = args.next(tys) {
let Arg::Value(ty) = arg else { continue };
let Some(loc) = parama.next(ty, tys) else { continue };
let &arg = allocs.next().unwrap();
let (rg, size) = match loc {
PLoc::Reg(rg, size) if ty.loc(tys) == Loc::Stack => (rg, size),
PLoc::WideReg(rg, size) => (rg, size),
PLoc::Ref(..) | PLoc::Reg(..) => continue,
};
self.emit(instrs::ld(rg, atr(arg), 0, size));
}
debug_assert!(
!matches!(ret, Some(PLoc::Ref(..))) || allocs.next().is_some()
);
if func == ty::ECA {
self.emit(instrs::eca());
} else {
self.relocs.push(TypedReloc {
target: ty::Kind::Func(func).compress(),
reloc: Reloc::new(self.code.len(), 3, 4),
});
self.emit(instrs::jal(reg::RET_ADDR, reg::ZERO, 0));
}
if let Some(PLoc::WideReg(r, size)) = ret {
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debug_assert_eq!(
fuc.nodes[*node.inputs.last().unwrap()].kind,
Kind::Stck
);
moving hbvm related code into one file
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let stck = fuc.nodes[*node.inputs.last().unwrap()].offset;
self.emit(instrs::st(r, reg::STACK_PTR, stck as _, size));
}
if let Some(PLoc::Reg(r, size)) = ret
&& node.ty.loc(tys) == Loc::Stack
{
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debug_assert_eq!(
fuc.nodes[*node.inputs.last().unwrap()].kind,
Kind::Stck
);
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let stck = fuc.nodes[*node.inputs.last().unwrap()].offset;
self.emit(instrs::st(r, reg::STACK_PTR, stck as _, size));
}
}
Kind::Global { global } => {
let reloc = Reloc::new(self.code.len(), 3, 4);
self.relocs.push(TypedReloc {
target: ty::Kind::Global(global).compress(),
reloc,
});
self.emit(instrs::lra(atr(allocs[0]), 0, 0));
}
Kind::Stck => {
let base = reg::STACK_PTR;
let offset = fuc.nodes[nid].offset;
self.emit(instrs::addi64(atr(allocs[0]), base, offset as _));
}
Kind::Load => {
let mut region = node.inputs[1];
let mut offset = 0;
if fuc.nodes[region].kind == (Kind::BinOp { op: TokenKind::Add })
&& let Kind::CInt { value } =
fuc.nodes[fuc.nodes[region].inputs[2]].kind
{
region = fuc.nodes[region].inputs[1];
offset = value as Offset;
}
let size = tys.size_of(node.ty);
if node.ty.loc(tys) != Loc::Stack {
let (base, offset) = match fuc.nodes[region].kind {
Kind::Stck => (reg::STACK_PTR, fuc.nodes[region].offset + offset),
_ => (atr(allocs[1]), offset),
};
self.emit(instrs::ld(atr(allocs[0]), base, offset as _, size as _));
}
}
making the aliasing analisys bit smarter
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Kind::Stre if node.inputs[1] == VOID => {}
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Kind::Stre => {
let mut region = node.inputs[2];
let mut offset = 0;
let size = u16::try_from(tys.size_of(node.ty)).expect("TODO");
if fuc.nodes[region].kind == (Kind::BinOp { op: TokenKind::Add })
&& let Kind::CInt { value } =
fuc.nodes[fuc.nodes[region].inputs[2]].kind
&& node.ty.loc(tys) == Loc::Reg
{
region = fuc.nodes[region].inputs[1];
offset = value as Offset;
}
let nd = &fuc.nodes[region];
let (base, offset, src) = match nd.kind {
Kind::Stck if node.ty.loc(tys) == Loc::Reg => {
(reg::STACK_PTR, nd.offset + offset, allocs[0])
}
_ => (atr(allocs[0]), offset, allocs[1]),
};
match node.ty.loc(tys) {
Loc::Reg => self.emit(instrs::st(atr(src), base, offset as _, size)),
Loc::Stack => {
debug_assert_eq!(offset, 0);
self.emit(instrs::bmc(atr(src), base, size))
}
}
}
Kind::Start
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| Kind::Assert { .. }
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| Kind::Entry
| Kind::Mem
| Kind::End
| Kind::Loops
| Kind::Then
| Kind::Else
| Kind::Phi
| Kind::Arg => unreachable!(),
}
}
}
self.nodes = nodes;
saved_regs.len()
}
pub fn emit_ct_body(
&mut self,
tys: &mut Types,
files: &[parser::Ast],
sig: Sig,
cleanup
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pool: &mut Pool,
moving hbvm related code into one file
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) {
cleanup
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self.emit_body(tys, files, sig, pool);
moving hbvm related code into one file
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self.code.truncate(self.code.len() - instrs::jala(0, 0, 0).0);
self.emit(instrs::tx());
}
cleanup
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pub fn emit_body(&mut self, tys: &mut Types, files: &[parser::Ast], sig: Sig, pool: &mut Pool) {
moving hbvm related code into one file
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self.nodes.check_final_integrity(tys, files);
self.nodes.graphviz(tys, files);
cleanup
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self.nodes.gcm(&mut pool.nid_stack);
moving hbvm related code into one file
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self.nodes.basic_blocks();
self.nodes.graphviz(tys, files);
debug_assert!(self.code.is_empty());
let tail = mem::take(&mut self.call_count) == 0;
'_open_function: {
self.emit(instrs::addi64(reg::STACK_PTR, reg::STACK_PTR, 0));
self.emit(instrs::st(reg::RET_ADDR + tail as u8, reg::STACK_PTR, 0, 0));
}
let mut stack_size = 0;
'_compute_stack: {
let mems = mem::take(&mut self.nodes[MEM].outputs);
for &stck in mems.iter() {
if !matches!(self.nodes[stck].kind, Kind::Stck | Kind::Arg) {
debug_assert_matches!(
self.nodes[stck].kind,
Kind::Phi | Kind::Return | Kind::Load | Kind::Call { .. } | Kind::Stre
);
continue;
}
stack_size += tys.size_of(self.nodes[stck].ty);
self.nodes[stck].offset = stack_size;
}
for &stck in mems.iter() {
if !matches!(self.nodes[stck].kind, Kind::Stck | Kind::Arg) {
continue;
}
self.nodes[stck].offset = stack_size - self.nodes[stck].offset;
}
self.nodes[MEM].outputs = mems;
}
cleanup
2024-10-27 15:34:03 -05:00
let saved = self.emit_body_code(sig, tys, files, &mut pool.ralloc);
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
if let Some(last_ret) = self.ret_relocs.last()
&& last_ret.offset as usize == self.code.len() - 5
&& self
.jump_relocs
.last()
.map_or(true, |&(r, _)| self.nodes[r].offset as usize != self.code.len())
{
self.code.truncate(self.code.len() - 5);
self.ret_relocs.pop();
}
// FIXME: maybe do this incrementally
for (nd, rel) in self.jump_relocs.drain(..) {
let offset = self.nodes[nd].offset;
//debug_assert!(offset < self.code.len() as u32 - 1);
rel.apply_jump(&mut self.code, offset, 0);
}
let end = self.code.len();
for ret_rel in self.ret_relocs.drain(..) {
ret_rel.apply_jump(&mut self.code, end as _, 0);
}
let mut stripped_prelude_size = 0;
'_close_function: {
let pushed = (saved as i64 + !tail as i64) * 8;
let stack = stack_size as i64;
match (pushed, stack) {
(0, 0) => {
stripped_prelude_size = instrs::addi64(0, 0, 0).0 + instrs::st(0, 0, 0, 0).0;
self.code.drain(0..stripped_prelude_size);
break '_close_function;
}
(0, stack) => {
write_reloc(&mut self.code, 3, -stack, 8);
stripped_prelude_size = instrs::st(0, 0, 0, 0).0;
let end = instrs::addi64(0, 0, 0).0 + instrs::st(0, 0, 0, 0).0;
self.code.drain(instrs::addi64(0, 0, 0).0..end);
self.emit(instrs::addi64(reg::STACK_PTR, reg::STACK_PTR, stack as _));
break '_close_function;
}
_ => {}
}
write_reloc(&mut self.code, 3, -(pushed + stack), 8);
write_reloc(&mut self.code, 3 + 8 + 3, stack, 8);
write_reloc(&mut self.code, 3 + 8 + 3 + 8, pushed, 2);
self.emit(instrs::ld(
reg::RET_ADDR + tail as u8,
reg::STACK_PTR,
stack as _,
pushed as _,
));
self.emit(instrs::addi64(reg::STACK_PTR, reg::STACK_PTR, (pushed + stack) as _));
}
self.relocs.iter_mut().for_each(|r| r.reloc.offset -= stripped_prelude_size as u32);
adding unreachable
2024-11-03 03:15:03 -06:00
if sig.ret != ty::Id::NEVER {
self.emit(instrs::jala(reg::ZERO, reg::RET_ADDR, 0));
}
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
}
}
#[derive(Debug)]
struct Block {
nid: Nid,
preds: Vec<regalloc2::Block>,
succs: Vec<regalloc2::Block>,
instrs: regalloc2::InstRange,
params: Vec<regalloc2::VReg>,
branch_blockparams: Vec<regalloc2::VReg>,
}
#[derive(Debug)]
struct Instr {
nid: Nid,
ops: Vec<regalloc2::Operand>,
}
pub struct Function<'a> {
sig: Sig,
nodes: &'a mut Nodes,
tys: &'a Types,
blocks: Vec<Block>,
instrs: Vec<Instr>,
}
impl core::fmt::Debug for Function<'_> {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
for (i, block) in self.blocks.iter().enumerate() {
writeln!(f, "sb{i}{:?}-{:?}:", block.params, block.preds)?;
for inst in block.instrs.iter() {
let instr = &self.instrs[inst.index()];
writeln!(f, "{}: i{:?}:{:?}", inst.index(), self.nodes[instr.nid].kind, instr.ops)?;
}
writeln!(f, "eb{i}{:?}-{:?}:", block.branch_blockparams, block.succs)?;
}
Ok(())
}
}
impl<'a> Function<'a> {
fn new(nodes: &'a mut Nodes, tys: &'a Types, sig: Sig) -> Self {
let mut s =
Self { nodes, tys, sig, blocks: Default::default(), instrs: Default::default() };
s.nodes.visited.clear(s.nodes.values.len());
s.emit_node(VOID, VOID);
s.add_block(0);
s.blocks.pop();
s
}
fn add_block(&mut self, nid: Nid) -> RallocBRef {
if let Some(prev) = self.blocks.last_mut() {
prev.instrs = regalloc2::InstRange::new(
prev.instrs.first(),
regalloc2::Inst::new(self.instrs.len()),
);
}
self.blocks.push(Block {
nid,
preds: Default::default(),
succs: Default::default(),
instrs: regalloc2::InstRange::new(
regalloc2::Inst::new(self.instrs.len()),
regalloc2::Inst::new(self.instrs.len() + 1),
),
params: Default::default(),
branch_blockparams: Default::default(),
});
self.blocks.len() as RallocBRef - 1
}
fn add_instr(&mut self, nid: Nid, ops: Vec<regalloc2::Operand>) {
self.instrs.push(Instr { nid, ops });
}
fn urg(&mut self, nid: Nid) -> regalloc2::Operand {
regalloc2::Operand::reg_use(self.rg(nid))
}
fn drg(&mut self, nid: Nid) -> regalloc2::Operand {
regalloc2::Operand::reg_def(self.rg(nid))
}
fn rg(&self, nid: Nid) -> regalloc2::VReg {
debug_assert!(
!self.nodes.is_cfg(nid) || matches!(self.nodes[nid].kind, Kind::Call { .. }),
"{:?}",
self.nodes[nid]
);
fixing storing struct pointer bug
2024-10-28 12:39:42 -05:00
debug_assert_eq!(self.nodes[nid].lock_rc, 0, "{nid} {:?}", self.nodes[nid]);
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
debug_assert!(self.nodes[nid].kind != Kind::Phi || self.nodes[nid].ty != ty::Id::VOID);
regalloc2::VReg::new(nid as _, regalloc2::RegClass::Int)
}
fn emit_node(&mut self, nid: Nid, prev: Nid) {
if matches!(self.nodes[nid].kind, Kind::Region | Kind::Loop) {
let prev_bref = self.nodes[prev].ralloc_backref;
let node = self.nodes[nid].clone();
let idx = 1 + node.inputs.iter().position(|&i| i == prev).unwrap();
for ph in node.outputs {
if self.nodes[ph].kind != Kind::Phi || self.nodes[ph].ty == ty::Id::VOID {
continue;
}
let rg = self.rg(self.nodes[ph].inputs[idx]);
self.blocks[prev_bref as usize].branch_blockparams.push(rg);
}
self.add_instr(nid, vec![]);
match (self.nodes[nid].kind, self.nodes.visited.set(nid)) {
(Kind::Loop, false) => {
for i in node.inputs {
self.bridge(i, nid);
}
return;
}
(Kind::Region, true) => return,
_ => {}
}
} else if !self.nodes.visited.set(nid) {
return;
}
let mut node = self.nodes[nid].clone();
match node.kind {
Kind::Start => {
debug_assert_matches!(self.nodes[node.outputs[0]].kind, Kind::Entry);
self.emit_node(node.outputs[0], VOID)
}
Kind::If => {
self.nodes[nid].ralloc_backref = self.nodes[prev].ralloc_backref;
let &[_, cond] = node.inputs.as_slice() else { unreachable!() };
let &[mut then, mut else_] = node.outputs.as_slice() else { unreachable!() };
if let Kind::BinOp { op } = self.nodes[cond].kind
adding floating point arithmetic
2024-10-29 07:36:12 -05:00
&& let Some((_, swapped)) = op.cond_op(node.ty)
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
{
if swapped {
mem::swap(&mut then, &mut else_);
}
let &[_, lhs, rhs] = self.nodes[cond].inputs.as_slice() else { unreachable!() };
let ops = vec![self.urg(lhs), self.urg(rhs)];
self.add_instr(nid, ops);
} else {
mem::swap(&mut then, &mut else_);
let ops = vec![self.urg(cond)];
self.add_instr(nid, ops);
}
self.emit_node(then, nid);
self.emit_node(else_, nid);
}
Kind::Region | Kind::Loop => {
self.nodes[nid].ralloc_backref = self.add_block(nid);
if node.kind == Kind::Region {
for i in node.inputs {
self.bridge(i, nid);
}
}
let mut block = vec![];
for ph in node.outputs.clone() {
if self.nodes[ph].kind != Kind::Phi || self.nodes[ph].ty == ty::Id::VOID {
continue;
}
block.push(self.rg(ph));
}
self.blocks[self.nodes[nid].ralloc_backref as usize].params = block;
self.reschedule_block(nid, &mut node.outputs);
for o in node.outputs.into_iter().rev() {
self.emit_node(o, nid);
}
}
Kind::Return => {
let ops = match self.tys.parama(self.sig.ret).0 {
None => vec![],
Some(PLoc::Reg(..)) if self.sig.ret.loc(self.tys) == Loc::Stack => {
vec![self.urg(self.nodes[node.inputs[1]].inputs[1])]
}
Some(PLoc::Reg(r, ..)) => {
vec![regalloc2::Operand::reg_fixed_use(
self.rg(node.inputs[1]),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
)]
}
Some(PLoc::WideReg(..)) => {
vec![self.urg(self.nodes[node.inputs[1]].inputs[1])]
}
Some(PLoc::Ref(..)) => {
vec![self.urg(self.nodes[node.inputs[1]].inputs[1]), self.urg(MEM)]
}
};
self.add_instr(nid, ops);
self.emit_node(node.outputs[0], nid);
}
adding unreachable
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Kind::Die => {
self.add_instr(nid, vec![]);
self.emit_node(node.outputs[0], nid);
}
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
Kind::CInt { .. }
if node.outputs.iter().all(|&o| {
let ond = &self.nodes[o];
matches!(ond.kind, Kind::BinOp { op }
adding floating point arithmetic
2024-10-29 07:36:12 -05:00
if op.imm_binop(ond.ty).is_some()
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
&& self.nodes.is_const(ond.inputs[2])
adding floating point arithmetic
2024-10-29 07:36:12 -05:00
&& op.cond_op(ond.ty).is_none())
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
}) =>
{
self.nodes.lock(nid)
}
Kind::CInt { .. } => {
let ops = vec![self.drg(nid)];
self.add_instr(nid, ops);
}
Kind::Entry => {
self.nodes[nid].ralloc_backref = self.add_block(nid);
let (ret, mut parama) = self.tys.parama(self.sig.ret);
let mut typs = self.sig.args.args();
#[expect(clippy::unnecessary_to_owned)]
let mut args = self.nodes[VOID].outputs[ARG_START..].to_owned().into_iter();
while let Some(ty) = typs.next_value(self.tys) {
let arg = args.next().unwrap();
saving
2024-10-28 17:38:57 -05:00
debug_assert_eq!(self.nodes[arg].kind, Kind::Arg);
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
match parama.next(ty, self.tys) {
None => {}
Some(PLoc::Reg(r, _) | PLoc::WideReg(r, _) | PLoc::Ref(r, _)) => {
self.add_instr(NEVER, vec![regalloc2::Operand::reg_fixed_def(
self.rg(arg),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
)]);
}
}
}
if let Some(PLoc::Ref(r, ..)) = ret {
self.add_instr(NEVER, vec![regalloc2::Operand::reg_fixed_def(
self.rg(MEM),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
)]);
}
self.reschedule_block(nid, &mut node.outputs);
for o in node.outputs.into_iter().rev() {
self.emit_node(o, nid);
}
}
Kind::Then | Kind::Else => {
self.nodes[nid].ralloc_backref = self.add_block(nid);
self.bridge(prev, nid);
self.reschedule_block(nid, &mut node.outputs);
for o in node.outputs.into_iter().rev() {
self.emit_node(o, nid);
}
}
Kind::BinOp { op: TokenKind::Add } if self.nodes[node.inputs[1]].lock_rc != 0 => self.nodes.lock(nid),
Kind::BinOp { op: TokenKind::Add }
if self.nodes.is_const(node.inputs[2])
&& node.outputs.iter().all(|&n| {
(matches!(self.nodes[n].kind, Kind::Stre if self.nodes[n].inputs[2] == nid)
|| matches!(self.nodes[n].kind, Kind::Load if self.nodes[n].inputs[1] == nid))
&& self.nodes[n].ty.loc(self.tys) == Loc::Reg
}) =>
{
self.nodes.lock(nid)
}
Kind::BinOp { op }
adding floating point arithmetic
2024-10-29 07:36:12 -05:00
if op.cond_op(node.ty).is_some()
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
&& node.outputs.iter().all(|&n| self.nodes[n].kind == Kind::If) =>
{
self.nodes.lock(nid)
}
Kind::BinOp { .. } => {
let &[_, lhs, rhs] = node.inputs.as_slice() else { unreachable!() };
let ops = if let Kind::CInt { .. } = self.nodes[rhs].kind
&& self.nodes[rhs].lock_rc != 0
{
vec![self.drg(nid), self.urg(lhs)]
} else {
vec![self.drg(nid), self.urg(lhs), self.urg(rhs)]
};
self.add_instr(nid, ops);
}
Kind::UnOp { .. } => {
let ops = vec![self.drg(nid), self.urg(node.inputs[1])];
self.add_instr(nid, ops);
}
Kind::Call { args, .. } => {
self.nodes[nid].ralloc_backref = self.nodes[prev].ralloc_backref;
let mut ops = vec![];
let (ret, mut parama) = self.tys.parama(node.ty);
if ret.is_some() {
ops.push(regalloc2::Operand::reg_fixed_def(
self.rg(nid),
regalloc2::PReg::new(1, regalloc2::RegClass::Int),
));
}
let mut tys = args.args();
let mut args = node.inputs[1..].iter();
while let Some(ty) = tys.next_value(self.tys) {
let mut i = *args.next().unwrap();
let Some(loc) = parama.next(ty, self.tys) else { continue };
match loc {
PLoc::Reg(r, _) if ty.loc(self.tys) == Loc::Reg => {
ops.push(regalloc2::Operand::reg_fixed_use(
self.rg(i),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
));
}
PLoc::WideReg(..) | PLoc::Reg(..) => {
loop {
match self.nodes[i].kind {
Kind::Stre { .. } => i = self.nodes[i].inputs[2],
Kind::Load { .. } => i = self.nodes[i].inputs[1],
_ => break,
}
debug_assert_ne!(i, 0);
}
debug_assert!(i != 0);
ops.push(self.urg(i));
}
PLoc::Ref(r, _) => {
loop {
match self.nodes[i].kind {
Kind::Stre { .. } => i = self.nodes[i].inputs[2],
Kind::Load { .. } => i = self.nodes[i].inputs[1],
_ => break,
}
debug_assert_ne!(i, 0);
}
debug_assert!(i != 0);
ops.push(regalloc2::Operand::reg_fixed_use(
self.rg(i),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
));
}
}
}
if let Some(PLoc::Ref(r, _)) = ret {
ops.push(regalloc2::Operand::reg_fixed_use(
self.rg(*node.inputs.last().unwrap()),
regalloc2::PReg::new(r as _, regalloc2::RegClass::Int),
));
}
self.add_instr(nid, ops);
self.reschedule_block(nid, &mut node.outputs);
for o in node.outputs.into_iter().rev() {
if self.nodes[o].inputs[0] == nid
|| (matches!(self.nodes[o].kind, Kind::Loop | Kind::Region)
&& self.nodes[o].inputs[1] == nid)
{
self.emit_node(o, nid);
}
}
}
Kind::Global { .. } => {
let ops = vec![self.drg(nid)];
self.add_instr(nid, ops);
}
Kind::Stck | Kind::Arg
if node.outputs.iter().all(|&n| {
fixing storing struct pointer bug
2024-10-28 12:39:42 -05:00
matches!(self.nodes[n].kind, Kind::Load
adding floating point arithmetic
2024-10-29 07:36:12 -05:00
if self.nodes[n].ty.loc(self.tys) == Loc::Reg)
|| matches!(self.nodes[n].kind, Kind::Stre
fixing storing struct pointer bug
2024-10-28 12:39:42 -05:00
if self.nodes[n].ty.loc(self.tys) == Loc::Reg
removing return value temporary optimization sadly
2024-10-29 11:03:00 -05:00
&& self.nodes[n].inputs[1] != nid)
fixing storing struct pointer bug
2024-10-28 12:39:42 -05:00
|| matches!(self.nodes[n].kind, Kind::BinOp { op: TokenKind::Add }
if self.nodes.is_const(self.nodes[n].inputs[2])
&& self.nodes[n]
.outputs
.iter()
removing return value temporary optimization sadly
2024-10-29 11:03:00 -05:00
.all(|&n| matches!(self.nodes[n].kind, Kind::Load
if self.nodes[n].ty.loc(self.tys) == Loc::Reg)
|| matches!(self.nodes[n].kind, Kind::Stre
if self.nodes[n].ty.loc(self.tys) == Loc::Reg
&& self.nodes[n].inputs[1] != nid)))
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
}) => self.nodes.lock(nid),
Kind::Stck if self.tys.size_of(node.ty) == 0 => self.nodes.lock(nid),
Kind::Stck => {
let ops = vec![self.drg(nid)];
self.add_instr(nid, ops);
}
deferring all null checks after the peepholes
2024-11-03 14:13:24 -06:00
Kind::Assert { .. } => unreachable!(),
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
Kind::End |
Kind::Phi | Kind::Arg | Kind::Mem | Kind::Loops => {}
Kind::Load { .. } if node.ty.loc(self.tys) == Loc::Stack => {
self.nodes.lock(nid)
}
Kind::Load { .. } => {
let mut region = node.inputs[1];
if self.nodes[region].kind == (Kind::BinOp { op: TokenKind::Add })
&& self.nodes.is_const(self.nodes[region].inputs[2])
&& node.ty.loc(self.tys) == Loc::Reg
{
region = self.nodes[region].inputs[1]
}
let ops = match self.nodes[region].kind {
Kind::Stck => vec![self.drg(nid)],
_ => vec![self.drg(nid), self.urg(region)],
};
self.add_instr(nid, ops);
}
making the aliasing analisys bit smarter
2024-10-28 11:19:41 -05:00
Kind::Stre if node.inputs[1] == VOID => self.nodes.lock(nid),
moving hbvm related code into one file
2024-10-27 08:29:14 -05:00
Kind::Stre => {
let mut region = node.inputs[2];
if self.nodes[region].kind == (Kind::BinOp { op: TokenKind::Add })
&& self.nodes.is_const(self.nodes[region].inputs[2])
&& node.ty.loc(self.tys) == Loc::Reg
{
region = self.nodes[region].inputs[1]
}
let ops = match self.nodes[region].kind {
_ if node.ty.loc(self.tys) == Loc::Stack => {
if self.nodes[node.inputs[1]].kind == Kind::Arg {
vec![self.urg(region), self.urg(node.inputs[1])]
} else {
vec![self.urg(region), self.urg(self.nodes[node.inputs[1]].inputs[1])]
}
}
Kind::Stck => vec![self.urg(node.inputs[1])],
_ => vec![self.urg(region), self.urg(node.inputs[1])],
};
self.add_instr(nid, ops);
}
}
}
fn bridge(&mut self, pred: u16, succ: u16) {
if self.nodes[pred].ralloc_backref == u16::MAX
|| self.nodes[succ].ralloc_backref == u16::MAX
{
return;
}
self.blocks[self.nodes[pred].ralloc_backref as usize]
.succs
.push(regalloc2::Block::new(self.nodes[succ].ralloc_backref as usize));
self.blocks[self.nodes[succ].ralloc_backref as usize]
.preds
.push(regalloc2::Block::new(self.nodes[pred].ralloc_backref as usize));
}
fn reschedule_block(&mut self, from: Nid, outputs: &mut Vc) {
let from = Some(&from);
let mut buf = Vec::with_capacity(outputs.len());
let mut seen = BitSet::default();
seen.clear(self.nodes.values.len());
for &o in outputs.iter() {
if !self.nodes.is_cfg(o) {
continue;
}
seen.set(o);
let mut cursor = buf.len();
buf.push(o);
while let Some(&n) = buf.get(cursor) {
for &i in &self.nodes[n].inputs[1..] {
if from == self.nodes[i].inputs.first()
&& self.nodes[i]
.outputs
.iter()
.all(|&o| self.nodes[o].inputs.first() != from || seen.get(o))
&& seen.set(i)
{
buf.push(i);
}
}
cursor += 1;
}
}
for &o in outputs.iter() {
if !seen.set(o) {
continue;
}
let mut cursor = buf.len();
buf.push(o);
while let Some(&n) = buf.get(cursor) {
for &i in &self.nodes[n].inputs[1..] {
if from == self.nodes[i].inputs.first()
&& self.nodes[i]
.outputs
.iter()
.all(|&o| self.nodes[o].inputs.first() != from || seen.get(o))
&& seen.set(i)
{
buf.push(i);
}
}
cursor += 1;
}
}
debug_assert!(
outputs.len() == buf.len() || outputs.len() == buf.len() + 1,
"{:?} {:?}",
outputs,
buf
);
if buf.len() + 1 == outputs.len() {
outputs.remove(outputs.len() - 1);
}
outputs.copy_from_slice(&buf);
}
}
impl regalloc2::Function for Function<'_> {
fn num_insts(&self) -> usize {
self.instrs.len()
}
fn num_blocks(&self) -> usize {
self.blocks.len()
}
fn entry_block(&self) -> regalloc2::Block {
regalloc2::Block(0)
}
fn block_insns(&self, block: regalloc2::Block) -> regalloc2::InstRange {
self.blocks[block.index()].instrs
}
fn block_succs(&self, block: regalloc2::Block) -> &[regalloc2::Block] {
&self.blocks[block.index()].succs
}
fn block_preds(&self, block: regalloc2::Block) -> &[regalloc2::Block] {
&self.blocks[block.index()].preds
}
fn block_params(&self, block: regalloc2::Block) -> &[regalloc2::VReg] {
&self.blocks[block.index()].params
}
fn is_ret(&self, insn: regalloc2::Inst) -> bool {
adding unreachable
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matches!(self.nodes[self.instrs[insn.index()].nid].kind, Kind::Return | Kind::Die)
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}
fn is_branch(&self, insn: regalloc2::Inst) -> bool {
matches!(
self.nodes[self.instrs[insn.index()].nid].kind,
Kind::If | Kind::Then | Kind::Else | Kind::Entry | Kind::Loop | Kind::Region
)
}
fn branch_blockparams(
&self,
block: regalloc2::Block,
_insn: regalloc2::Inst,
_succ_idx: usize,
) -> &[regalloc2::VReg] {
debug_assert!(
self.blocks[block.index()].succs.len() == 1
|| self.blocks[block.index()].branch_blockparams.is_empty()
);
&self.blocks[block.index()].branch_blockparams
}
fn inst_operands(&self, insn: regalloc2::Inst) -> &[regalloc2::Operand] {
&self.instrs[insn.index()].ops
}
fn inst_clobbers(&self, insn: regalloc2::Inst) -> regalloc2::PRegSet {
let node = &self.nodes[self.instrs[insn.index()].nid];
if matches!(node.kind, Kind::Call { .. }) {
let mut set = regalloc2::PRegSet::default();
let returns = self.tys.parama(node.ty).0.is_some();
for i in 1 + returns as usize..13 {
set.add(regalloc2::PReg::new(i, regalloc2::RegClass::Int));
}
set
} else {
regalloc2::PRegSet::default()
}
}
fn num_vregs(&self) -> usize {
self.nodes.values.len()
}
fn spillslot_size(&self, regclass: regalloc2::RegClass) -> usize {
match regclass {
regalloc2::RegClass::Int => 1,
regalloc2::RegClass::Float => unreachable!(),
regalloc2::RegClass::Vector => unreachable!(),
}
}
}
impl TokenKind {
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pub fn cmp_against(self) -> Option<u64> {
Some(match self {
TokenKind::Le | TokenKind::Gt => 1,
TokenKind::Ne | TokenKind::Eq => 0,
TokenKind::Ge | TokenKind::Lt => (-1i64) as _,
_ => return None,
})
}
pub fn float_cmp(self, ty: ty::Id) -> Option<fn(u8, u8, u8) -> EncodedInstr> {
if !ty.is_float() {
return None;
}
let size = ty.simple_size().unwrap();
let ops = match self {
TokenKind::Gt => [instrs::fcmpgt32, instrs::fcmpgt64],
TokenKind::Lt => [instrs::fcmplt32, instrs::fcmplt64],
_ => return None,
};
Some(ops[size.ilog2() as usize - 2])
}
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#[expect(clippy::type_complexity)]
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fn cond_op(self, ty: ty::Id) -> Option<(fn(u8, u8, i16) -> EncodedInstr, bool)> {
if ty.is_float() {
return None;
}
let signed = ty.is_signed();
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Some((
match self {
Self::Le if signed => instrs::jgts,
Self::Le => instrs::jgtu,
Self::Lt if signed => instrs::jlts,
Self::Lt => instrs::jltu,
Self::Ge if signed => instrs::jlts,
Self::Ge => instrs::jltu,
Self::Gt if signed => instrs::jgts,
Self::Gt => instrs::jgtu,
Self::Eq => instrs::jne,
Self::Ne => instrs::jeq,
_ => return None,
},
matches!(self, Self::Lt | TokenKind::Gt),
))
}
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fn binop(self, ty: ty::Id) -> Option<fn(u8, u8, u8) -> EncodedInstr> {
let size = ty.simple_size().unwrap();
if ty.is_integer() || ty == ty::Id::BOOL || ty.is_pointer() {
macro_rules! div { ($($op:ident),*) => {[$(|a, b, c| $op(a, 0, b, c)),*]}; }
macro_rules! rem { ($($op:ident),*) => {[$(|a, b, c| $op(0, a, b, c)),*]}; }
let signed = ty.is_signed();
let ops = match self {
Self::Add => [add8, add16, add32, add64],
Self::Sub => [sub8, sub16, sub32, sub64],
Self::Mul => [mul8, mul16, mul32, mul64],
Self::Div if signed => div!(dirs8, dirs16, dirs32, dirs64),
Self::Div => div!(diru8, diru16, diru32, diru64),
Self::Mod if signed => rem!(dirs8, dirs16, dirs32, dirs64),
Self::Mod => rem!(diru8, diru16, diru32, diru64),
Self::Band => return Some(and),
Self::Bor => return Some(or),
Self::Xor => return Some(xor),
Self::Shl => [slu8, slu16, slu32, slu64],
Self::Shr if signed => [srs8, srs16, srs32, srs64],
Self::Shr => [sru8, sru16, sru32, sru64],
_ => return None,
};
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Some(ops[size.ilog2() as usize])
} else {
debug_assert!(ty.is_float(), "{self} {ty:?}");
let ops = match self {
Self::Add => [fadd32, fadd64],
Self::Sub => [fsub32, fsub64],
Self::Mul => [fmul32, fmul64],
Self::Div => [fdiv32, fdiv64],
_ => return None,
};
Some(ops[size.ilog2() as usize - 2])
}
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}
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fn imm_binop(self, ty: ty::Id) -> Option<fn(u8, u8, u64) -> EncodedInstr> {
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macro_rules! def_op {
($name:ident |$a:ident, $b:ident, $c:ident| $($tt:tt)*) => {
macro_rules! $name {
($$($$op:ident),*) => {
[$$(
|$a, $b, $c: u64| $$op($($tt)*),
)*]
}
}
};
}
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if ty.is_float() {
return None;
}
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def_op!(basic_op | a, b, c | a, b, c as _);
def_op!(sub_op | a, b, c | a, b, c.wrapping_neg() as _);
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let signed = ty.is_signed();
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let ops = match self {
Self::Add => basic_op!(addi8, addi16, addi32, addi64),
Self::Sub => sub_op!(addi8, addi16, addi32, addi64),
Self::Mul => basic_op!(muli8, muli16, muli32, muli64),
Self::Band => return Some(andi),
Self::Bor => return Some(ori),
Self::Xor => return Some(xori),
Self::Shr if signed => basic_op!(srui8, srui16, srui32, srui64),
Self::Shr => basic_op!(srui8, srui16, srui32, srui64),
Self::Shl => basic_op!(slui8, slui16, slui32, slui64),
_ => return None,
};
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let size = ty.simple_size().unwrap();
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Some(ops[size.ilog2() as usize])
}
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pub fn unop(&self, dst: ty::Id, src: ty::Id) -> Option<fn(u8, u8) -> EncodedInstr> {
let src_idx = src.simple_size().unwrap().ilog2() as usize - 2;
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Some(match self {
Self::Sub => instrs::neg,
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Self::Float if dst.is_float() && src.is_integer() => {
[instrs::itf32, instrs::itf64][src_idx]
}
Self::Number if src.is_float() && dst.is_integer() => {
[|a, b| instrs::fti32(a, b, 1), |a, b| instrs::fti64(a, b, 1)][src_idx]
}
Self::Float if dst.is_float() && src.is_float() => {
[instrs::fc32t64, |a, b| instrs::fc64t32(a, b, 1)][src_idx]
}
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_ => return None,
})
}
}
type EncodedInstr = (usize, [u8; instrs::MAX_SIZE]);
fn emit(out: &mut Vec<u8>, (len, instr): EncodedInstr) {
out.extend_from_slice(&instr[..len]);
}
pub fn binary_prelude(to: &mut Vec<u8>) {
emit(to, instrs::jal(reg::RET_ADDR, reg::ZERO, 0));
emit(to, instrs::tx());
}
#[derive(Default)]
pub struct LoggedMem {
pub mem: hbvm::mem::HostMemory,
op_buf: Vec<hbbytecode::Oper>,
disp_buf: String,
prev_instr: Option<hbbytecode::Instr>,
}
impl LoggedMem {
unsafe fn display_instr<T>(&mut self, instr: hbbytecode::Instr, addr: hbvm::mem::Address) {
let novm: *const hbvm::Vm<Self, 0> = core::ptr::null();
let offset = core::ptr::addr_of!((*novm).memory) as usize;
let regs = unsafe {
&*core::ptr::addr_of!(
(*(((self as *mut _ as *mut u8).sub(offset)) as *const hbvm::Vm<Self, 0>))
.registers
)
};
let mut bytes = core::slice::from_raw_parts(
(addr.get() - 1) as *const u8,
core::mem::size_of::<T>() + 1,
);
use core::fmt::Write;
hbbytecode::parse_args(&mut bytes, instr, &mut self.op_buf).unwrap();
debug_assert!(bytes.is_empty());
self.disp_buf.clear();
write!(self.disp_buf, "{:<10}", format!("{instr:?}")).unwrap();
for (i, op) in self.op_buf.drain(..).enumerate() {
if i != 0 {
write!(self.disp_buf, ", ").unwrap();
}
write!(self.disp_buf, "{op:?}").unwrap();
if let hbbytecode::Oper::R(r) = op {
write!(self.disp_buf, "({})", regs[r as usize].0).unwrap()
}
}
log::trace!("read-typed: {:x}: {}", addr.get(), self.disp_buf);
}
}
impl hbvm::mem::Memory for LoggedMem {
unsafe fn load(
&mut self,
addr: hbvm::mem::Address,
target: *mut u8,
count: usize,
) -> Result<(), hbvm::mem::LoadError> {
log::trace!(
"load: {:x} {}",
addr.get(),
AsHex(core::slice::from_raw_parts(addr.get() as *const u8, count))
);
self.mem.load(addr, target, count)
}
unsafe fn store(
&mut self,
addr: hbvm::mem::Address,
source: *const u8,
count: usize,
) -> Result<(), hbvm::mem::StoreError> {
log::trace!(
"store: {:x} {}",
addr.get(),
AsHex(core::slice::from_raw_parts(source, count))
);
self.mem.store(addr, source, count)
}
unsafe fn prog_read<T: Copy + 'static>(&mut self, addr: hbvm::mem::Address) -> T {
if log::log_enabled!(log::Level::Trace) {
if core::any::TypeId::of::<u8>() == core::any::TypeId::of::<T>() {
if let Some(instr) = self.prev_instr {
self.display_instr::<()>(instr, addr);
}
self.prev_instr = hbbytecode::Instr::try_from(*(addr.get() as *const u8)).ok();
} else {
let instr = self.prev_instr.take().unwrap();
self.display_instr::<T>(instr, addr);
}
}
self.mem.prog_read(addr)
}
}
struct AsHex<'a>(&'a [u8]);
impl core::fmt::Display for AsHex<'_> {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
for &b in self.0 {
write!(f, "{b:02x}")?;
}
Ok(())
}
}
const VM_STACK_SIZE: usize = 1024 * 64;
pub struct Comptime {
pub vm: hbvm::Vm<LoggedMem, { 1024 * 10 }>,
stack: Box<[u8; VM_STACK_SIZE]>,
pub code: Vec<u8>,
}
impl Comptime {
pub fn run(&mut self, ret_loc: &mut [u8], offset: u32) -> u64 {
self.vm.write_reg(reg::RET, ret_loc.as_mut_ptr() as u64);
let prev_pc = self.push_pc(offset);
loop {
match self.vm.run().expect("TODO") {
hbvm::VmRunOk::End => break,
hbvm::VmRunOk::Timer => todo!(),
hbvm::VmRunOk::Ecall => todo!(),
hbvm::VmRunOk::Breakpoint => todo!(),
}
}
self.pop_pc(prev_pc);
if let len @ 1..=8 = ret_loc.len() {
ret_loc.copy_from_slice(&self.vm.read_reg(reg::RET).0.to_ne_bytes()[..len])
}
self.vm.read_reg(reg::RET).0
}
pub fn reset(&mut self) {
let ptr = unsafe { self.stack.as_mut_ptr().cast::<u8>().add(VM_STACK_SIZE) as u64 };
self.vm.registers.fill(hbvm::value::Value(0));
self.vm.write_reg(reg::STACK_PTR, ptr);
self.vm.pc = hbvm::mem::Address::new(self.code.as_ptr() as u64 + HEADER_SIZE as u64);
}
fn push_pc(&mut self, offset: Offset) -> hbvm::mem::Address {
let entry = &mut self.code[offset as usize] as *mut _ as _;
core::mem::replace(&mut self.vm.pc, hbvm::mem::Address::new(entry))
- self.code.as_ptr() as usize
}
fn pop_pc(&mut self, prev_pc: hbvm::mem::Address) {
self.vm.pc = prev_pc + self.code.as_ptr() as usize;
}
pub fn clear(&mut self) {
self.code.clear();
}
}
impl Default for Comptime {
fn default() -> Self {
let mut stack = Box::<[u8; VM_STACK_SIZE]>::new_uninit();
let mut vm = hbvm::Vm::default();
let ptr = unsafe { stack.as_mut_ptr().cast::<u8>().add(VM_STACK_SIZE) as u64 };
vm.write_reg(reg::STACK_PTR, ptr);
Self { vm, stack: unsafe { stack.assume_init() }, code: Default::default() }
}
}
const HEADER_SIZE: usize = core::mem::size_of::<AbleOsExecutableHeader>();
#[repr(packed)]
#[expect(dead_code)]
pub struct AbleOsExecutableHeader {
magic_number: [u8; 3],
executable_version: u32,
code_length: u64,
data_length: u64,
debug_length: u64,
config_length: u64,
metadata_length: u64,
}
#[cfg(test)]
pub fn test_run_vm(out: &[u8], output: &mut String) {
use core::fmt::Write;
let mut stack = [0_u64; 1024 * 20];
let mut vm = unsafe {
hbvm::Vm::<_, { 1024 * 100 }>::new(
LoggedMem::default(),
hbvm::mem::Address::new(out.as_ptr() as u64).wrapping_add(HEADER_SIZE),
)
};
vm.write_reg(reg::STACK_PTR, unsafe { stack.as_mut_ptr().add(stack.len()) } as u64);
let stat = loop {
match vm.run() {
Ok(hbvm::VmRunOk::End) => break Ok(()),
Ok(hbvm::VmRunOk::Ecall) => match vm.read_reg(2).0 {
1 => writeln!(output, "ev: Ecall").unwrap(), // compatibility with a test
69 => {
let [size, align] = [vm.read_reg(3).0 as usize, vm.read_reg(4).0 as usize];
let layout = core::alloc::Layout::from_size_align(size, align).unwrap();
let ptr = unsafe { alloc::alloc::alloc(layout) };
vm.write_reg(1, ptr as u64);
}
96 => {
let [ptr, size, align] = [
vm.read_reg(3).0 as usize,
vm.read_reg(4).0 as usize,
vm.read_reg(5).0 as usize,
];
let layout = core::alloc::Layout::from_size_align(size, align).unwrap();
unsafe { alloc::alloc::dealloc(ptr as *mut u8, layout) };
}
3 => vm.write_reg(1, 42),
unknown => unreachable!("unknown ecall: {unknown:?}"),
},
Ok(hbvm::VmRunOk::Timer) => {
writeln!(output, "timed out").unwrap();
break Ok(());
}
Ok(ev) => writeln!(output, "ev: {:?}", ev).unwrap(),
Err(e) => break Err(e),
}
};
writeln!(output, "code size: {}", out.len() - HEADER_SIZE).unwrap();
writeln!(output, "ret: {:?}", vm.read_reg(1).0).unwrap();
writeln!(output, "status: {:?}", stat).unwrap();
}
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