Files
nix-js/fix-vm/src/instructions/variables.rs
T

51 lines
1.5 KiB
Rust

use crate::{BytecodeReader, Mutation, Step, Value};
impl<'gc> crate::Vm<'gc> {
#[inline(always)]
pub(crate) fn op_load_local(&mut self, reader: &mut BytecodeReader<'_>) -> Step {
let idx = reader.read_u32() as usize;
self.push(self.env.borrow().locals[idx]);
Step::Continue(())
}
#[inline(always)]
pub(crate) fn op_load_outer(&mut self, reader: &mut BytecodeReader<'_>) -> Step {
let layer = reader.read_u8();
let idx = reader.read_u32() as usize;
let mut cur = self.env;
for _ in 0..layer {
let prev = cur.borrow().prev.expect("LoadOuter: env chain too short");
cur = prev;
}
let val = cur.borrow().locals[idx];
self.push(val);
Step::Continue(())
}
#[inline(always)]
pub(crate) fn op_store_local(
&mut self,
reader: &mut BytecodeReader<'_>,
mc: &Mutation<'gc>,
) -> Step {
let idx = reader.read_u32() as usize;
let val = self.pop();
self.env.borrow_mut(mc).locals[idx] = val;
Step::Continue(())
}
#[inline(always)]
pub(crate) fn op_alloc_locals(
&mut self,
reader: &mut BytecodeReader<'_>,
mc: &Mutation<'gc>,
) -> Step {
let count = reader.read_u32() as usize;
self.env
.borrow_mut(mc)
.locals
.extend(std::iter::repeat_n(Value::default(), count));
Step::Continue(())
}
}