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add pass_move_add_to

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This commit is contained in:
nora 2022-04-16 14:35:56 +02:00
parent 014770b6fe
commit 93f97e9a08
4 changed files with 95 additions and 25 deletions
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30
rust2/src/codegen_interpreter.rs
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@ -62,16 +62,13 @@ where
Stmt::Sub(n) => {
*self.elem_mut() -= n;
}
Stmt::AddOffset(o, n) => unsafe {
*self
.mem
.get_unchecked_mut((self.ptr as isize + (o as isize)) as usize) += n;
},
Stmt::SubOffset(o, n) => unsafe {
*self
.mem
.get_unchecked_mut((self.ptr as isize + (o as isize)) as usize) -= n;
},
Stmt::AddOffset { offset, n } => *self.elem_mut_offset(offset) += n,
Stmt::SubOffset { offset, n } => *self.elem_mut_offset(offset) -= n,
Stmt::MoveAddTo { offset } => {
let value = self.elem();
*self.elem_mut() = Wrapping(0);
*self.elem_mut_offset(offset) += value;
}
Stmt::Right(n) => {
self.ptr += n as usize;
if self.ptr >= MEM_SIZE {
@ -116,15 +113,24 @@ where
(self.profile_collector)(self.ip);
}
}
fn elem_mut_offset(&mut self, offset: i32) -> &mut Wrapping<u8> {
let ptr = self.ptr as isize;
let offset = offset as isize;
// SAFETY: `self.ptr` is never out of bounds
debug_assert!(self.ptr < self.mem.len());
unsafe { self.mem.get_unchecked_mut((ptr + offset) as usize) }
}
fn elem_mut(&mut self) -> &mut Wrapping<u8> {
// SAFETY: `self.ptr` is never out of bounds
//debug_assert!(self.ptr < self.mem.len());
debug_assert!(self.ptr < self.mem.len());
unsafe { self.mem.get_unchecked_mut(self.ptr) }
}
fn elem(&self) -> u8 {
// SAFETY: `self.ptr` is never out of bounds
//debug_assert!(self.ptr < self.mem.len());
debug_assert!(self.ptr < self.mem.len());
unsafe { self.mem.get_unchecked(self.ptr).0 }
}
}