ft(interpreter): impl all low-hanging fruit instructions

src/operands.rs

@@ -7,7 +7,7 @@ use crate::register::SegmentRegister;
 
 use crate::{disasm::DisasmError, register::Register};
 use core::fmt;
-use std::ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Sub};
+use std::ops::{Add, BitAnd, BitOr, BitXor, Div, Mul, Not, Sub};
 
 pub type Byte = u8; // b
 pub type IByte = i8; // used for displacements of memory access
@@ -334,6 +334,17 @@ impl BitXor for ImmediateOperand {
     }
 }
 
+impl Not for ImmediateOperand {
+    type Output = Self;
+
+    fn not(self) -> Self::Output {
+        match self {
+            ImmediateOperand::Byte(b) => ImmediateOperand::Byte(!b),
+            ImmediateOperand::Word(w) => ImmediateOperand::Word(!w),
+        }
+    }
+}
+
 impl fmt::Display for ImmediateOperand {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         match self {