diff --git a/src/parser.c b/src/parser.c
index a11766e..0cdccb5 100644
--- a/src/parser.c
+++ b/src/parser.c
@@ -186,6 +186,7 @@ void classifyOpcode(char* opcode, a64inst_instruction *instr, char *operandList[
             else {
                 data.regType=1;
             }
+            // arithmetic
             // add, adds
             if (opcode[1] == 'd') {
                 data.DPIOpType = 0;
@@ -193,10 +194,11 @@ void classifyOpcode(char* opcode, a64inst_instruction *instr, char *operandList[
                 data.processOpData.arithmData.immediate = getOperandNumber(operandList[2]);
                 if (opcode[-1] == 's') {
                     data.processOpData.arithmData.shiftImmediate = true;
-                    
+                    data.processOp = 1;
                 }
                 else {
                     data.processOpData.arithmData.shiftImmediate = false;
+                    data.processOp = 0;
                 }
             }
             // cmn
@@ -205,7 +207,31 @@ void classifyOpcode(char* opcode, a64inst_instruction *instr, char *operandList[
                 data.processOpData.arithmData.src = ZERO_REGISTER;
                 data.processOpData.arithmData.immediate = getOperandNumber(operandList[1]);
                 data.processOpData.arithmData.shiftImmediate = true;
+                data.processOp = 1;
             }
+            // sub, subs
+            else if (opcode[0] == 's') {
+                data.DPIOpType = 0;
+                data.processOpData.arithmData.src = getOperandNumber(operandList[1]);
+                data.processOpData.arithmData.immediate = getOperandNumber(operandList[2]);
+                if (opcode[-1] == 's') {
+                    data.processOpData.arithmData.shiftImmediate = true;
+                    data.processOp = 3;
+                }
+                else {
+                    data.processOpData.arithmData.shiftImmediate = false;
+                    data.processOp = 2;
+                }
+            }
+            // cmp
+            else if (opcode == 'cmp') {
+                data.DPIOpType = 0;
+                data.processOpData.arithmData.src = ZERO_REGISTER;
+                data.processOpData.arithmData.immediate = getOperandNumber(operandList[1]);
+                data.processOpData.arithmData.shiftImmediate = true;
+                data.processOp = 3;
+            }
+            // wide move
         }
 
     }