Implement BLTU

src/instructions.rs

@@ -52,6 +52,7 @@ pub(crate) fn find_and_exec(instr: Instruction, core: &mut Core) -> Option<Instr
             // BRANCH
             0b000 => Some(rvi::beq(core, instr)),
             0b001 => Some(rvi::bne(core, instr)),
+            0b110 => Some(rvi::bltu(core, instr)),
             0b111 => Some(rvi::bgeu(core, instr)),
             _ => None,
         },

src/instructions/rvi.rs

@@ -132,3 +132,13 @@ pub fn bgeu(core: &mut Core, instr: Instruction) -> InstructionResult {
 
     InstructionResult::Normal
 }
+
+pub fn bltu(core: &mut Core, instr: Instruction) -> InstructionResult {
+    if core.reg_read(instr.rs1()) < core.reg_read(instr.rs2()) {
+        core.pc = core.pc.wrapping_add(instr.imm_b());
+    } else {
+        core.advance_pc();
+    }
+
+    InstructionResult::Normal
+}