HALT instruction... but it voids future stages' instructions

1 files changed, 18 insertions, 1 deletions

diff --git a/inc/ex.h b/inc/ex.h
index e4c9d2b..f63539c 100644
--- a/inc/ex.h
+++ b/inc/ex.h
@@ -3,8 +3,16 @@
 #include "instrDTO.h"
 #include "response.h"
 #include "stage.h"
+#include <exception>
 #include <unordered_map>
 
+class HaltException : public std::exception
+{
+	const char *what() const noexcept override {
+		return "";
+	}
+};
+
 class EX : public Stage
 {
   public:
@@ -19,13 +27,22 @@ class EX : public Stage
   private:
 	void advance_helper();
 	/**
+	 * Wrapper for division functions, which detects HALT instructinos (division
+	 * by 0).
+	 * @param the numerator
+	 * @param the denominator
+	 * @param if the modulo operator should instead be used
+	 */
+	void handle_divide(signed int &s1, signed int s2, bool is_mod);
+	/**
 	 * Maps each mnemonic to a function which carries out the instruction's base
 	 * logic.
 	 * All instructions store the result into s1.
 	 */
 	std::unordered_map<
 		Mnemonic,
-		std::function<void(signed int &s1, signed int s2, signed int s3, unsigned int pc)>>
+		std::function<void(
+			signed int &s1, signed int s2, signed int s3, unsigned int pc)>>
 		instr_map;
 };