Implement DIV

src/instructions/rvm.rs

@@ -6,4 +6,11 @@
 //
 use crate::{core::Core, decode::Instruction, exceptions::Exception};
 
+// multiplication
 instr_op_r!(mul, u64::wrapping_mul);
+
+// division
+instr_op_r!(div, |a, b| match b {
+    0 => -1,
+    _ => i64::wrapping_div(a as i64, b as i64),
+} as u64);