Implement OR

src/instructions.rs

@@ -17,6 +17,7 @@ pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<Instr
             // OP
             (0b0000000, 0b000) => Some(rvi::add(core, instr)),
             (0b0000000, 0b111) => Some(rvi::and(core, instr)),
+            (0b0000000, 0b110) => Some(rvi::or(core, instr)),
             _ => None,
         },
         0b00100 => match instr.funct3() {

src/instructions/rvi.rs

@@ -52,6 +52,15 @@ pub fn andi(core: &mut Core, instr: Instruction) -> InstructionResult {
     InstructionResult::Normal
 }
 
+pub fn or(core: &mut Core, instr: Instruction) -> InstructionResult {
+    core.reg_write(
+        instr.rd(),
+        core.reg_read(instr.rs1()) | core.reg_read(instr.rs2()),
+    );
+    core.advance_pc();
+    InstructionResult::Normal
+}
+
 pub fn slli(core: &mut Core, instr: Instruction) -> InstructionResult {
     core.reg_write(instr.rd(), core.reg_read(instr.rs1()) << instr.imm_shamt());
     core.advance_pc();