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feat(tazjin/rlox): Implement simple arithmetic operators

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Change-Id: I9873bcd281053f4e9820a5119f5992a0b8cb8cfc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/2417
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
This commit is contained in:
Vincent Ambo 2021-01-18 00:08:30 +03:00 • committed by tazjin
parent 7fb93fb490
commit d6d3c12efb
4 changed files with 34 additions and 1 deletions
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18
users/tazjin/rlox/src/bytecode/vm.rs
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@ -23,6 +23,14 @@ impl VM {
}
}
macro_rules! binary_op {
( $vm:ident, $op:tt ) => {{
let a = $vm.pop();
let b = $vm.pop();
$vm.push(a $op b);
}}
}
impl VM {
fn run(&mut self) -> LoxResult<()> {
loop {
@ -43,6 +51,16 @@ impl VM {
let c = *self.chunk.constant(*idx);
self.push(c);
}
OpCode::OpNegate => {
let v = self.pop();
self.push(-v)
}
OpCode::OpAdd => binary_op!(self, +),
OpCode::OpSubtract => binary_op!(self, -),
OpCode::OpMultiply => binary_op!(self, *),
OpCode::OpDivide => binary_op!(self, /),
}
}
}