adding wide return move for wider range of cases

This commit is contained in:
mlokr 2024-09-17 15:47:23 +02:00
parent 6852452f1a
commit bba3570788
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GPG key ID: DEA147DDEE644993
3 changed files with 41 additions and 8 deletions

View file

@ -356,6 +356,19 @@ main := fn(): int {
}
```
#### wide_ret
```hb
OemIdent := struct {
dos_version: [u8; 8],
dos_version_name: [u8; 8],
}
main := fn(major: int, minor: int): OemIdent {
ver := [u8].(0, 0, 0, 0, 0, 0, 0, 0)
return OemIdent.(ver, ver)
}
```
### Incomplete Examples
#### comptime_pointers

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@ -1375,11 +1375,11 @@ impl Codegen {
Some(self.ci.inline_ret_loc.as_ref())
}
0 => None,
1..=8 => Some(Loc::reg(1)),
9..=16 => None,
1..=16 => Some(Loc::reg(1)),
//9..=16 => None,
_ => Some(Loc::reg(self.ci.ret_reg.as_ref()).into_derefed()),
};
let loc_is_none = loc.is_none();
//let loc_is_none = loc.is_none();
let value = if let Some(val) = val {
self.expr_ctx(val, Ctx { ty: self.ci.ret, loc })?
} else {
@ -1391,11 +1391,11 @@ impl Codegen {
Some(ret) => _ = self.assert_ty(pos, value.ty, ret, "return type"),
}
if let 9..=16 = size
&& loc_is_none
{
self.store_sized(value.loc, Loc::reg(1), size);
}
//if let 9..=16 = size
// && loc_is_none
//{
// self.store_sized(value.loc, Loc::reg(1), size);
//}
self.ci.ret_relocs.push(Reloc::new(self.ci.code.len(), 1, 4));
self.ci.emit(jmp(0));
@ -2286,6 +2286,25 @@ impl Codegen {
self.ci.emit(cp(dst.get(), src.get()));
}
}
(lpat!(false, src, 0, None), lpat!(false, dst, off, None)) => {
assert!(size <= 8);
let off_rem = 8 * (off % 8);
let freg = dst.get() + (off / 8) as u8;
if size < 8 {
let mask = !(((1u64 << (8 * size)) - 1) << off_rem);
self.ci.emit(andi(freg, freg, mask));
if off_rem == 0 {
self.ci.emit(or(freg, freg, src.get()));
} else {
let tmp = self.ci.regs.allocate();
self.ci.emit(slui64(tmp.get(), src.get(), off_rem as _));
self.ci.emit(or(freg, freg, src.get()));
self.ci.regs.free(tmp);
}
} else {
self.ci.emit(cp(freg, src.get()));
}
}
(lpat!(true, src, soff, ref ssta), lpat!(false, dst, 0, None)) => {
if size < 8 {
self.ci.emit(cp(dst.get(), 0));
@ -2748,5 +2767,6 @@ mod tests {
writing_into_string => README;
request_page => README;
tests_ptr_to_ptr_copy => README;
wide_ret => README;
}
}

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