created sicxe emulator project

simulator_SIC_XE/src/instructions.cpp

@@ -0,0 +1,60 @@
+#include "instructions.h"
+#include "machine.h"
+
+
+void addr_handler(Machine& m, int r1, int r2) {
+    m.setReg(r2, m.getReg(r1) + m.getReg(r2));
+}
+
+// CLEAR instruction: clears register r (first nibble), second nibble unused
+void clear_handler(Machine& m, int r, int unused) {
+    m.setReg(r, 0);
+}
+
+
+void divr_handler(Machine& m, int r1, int r2) {
+
+    if (m.getReg(r2) == 0) {
+        m.invalidOpcode(DIVR);
+        return;
+    }
+    m.setReg(r2, m.getReg(r2) / m.getReg(r1));
+}
+
+void mulr_handler(Machine &m, int r1, int r2)
+{
+    m.setReg(r2, m.getReg(r1) * m.getReg(r2));
+}
+
+void rmo_handler(Machine &m, int r1, int r2)
+{
+    m.setReg(r2, m.getReg(r1));
+}
+
+void shiftl_handler(Machine &m, int r1, int n)
+{
+    m.setReg(r1, m.getReg(r1) << n);
+}
+
+void shiftr_handler(Machine &m, int r1, int n)
+{
+    m.setReg(r1, m.getReg(r1) >> n);
+}
+void subr_handler(Machine &m, int r1, int r2)
+{
+    m.setReg(r2, m.getReg(r2) - m.getReg(r1));
+}
+
+// TODO: implement SVC functionality
+void svc_handler(Machine &m, int n, int unused)
+{
+    m.notImplemented("SVC");
+}
+
+void tixr_handler(Machine &m, int r1, int unused)
+{
+    m.setX(m.getX() + 1);
+    int valX = m.getX();
+    int valR1 = m.getReg(r1);
+    m.setSW(sic_comp(valX, valR1, m.getSW()));
+}