From be7539d6c92f7d9a2d1b62e8bc9f2bd9687656c9 Mon Sep 17 00:00:00 2001
From: Andrew Keeton <andrewrkeeton@gmail.com>
Date: Thu, 6 Nov 2014 19:32:15 -0500
Subject: [PATCH] Add branch_if_carry_clear().

---
 src/machine.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/machine.rs b/src/machine.rs
index 6175778..73f5596 100644
--- a/src/machine.rs
+++ b/src/machine.rs
@@ -541,6 +541,12 @@ impl Machine {
         self.registers.program_counter = addr;
     }
 
+    fn branch_if_carry_clear(&mut self, addr: Address) {
+        if !self.registers.status.contains(PS_CARRY) {
+            self.registers.program_counter = addr;
+        }
+    }
+
     fn branch_if_minus(&mut self, addr: Address) {
         if self.registers.status.contains(PS_NEGATIVE) {
             self.registers.program_counter = addr;