2 files changed, 40 insertions, 0 deletions
diff --git a/src/runtime.c b/src/runtime.c
index d07f141..19115b6 100644
--- a/src/runtime.c
+++ b/src/runtime.c
@@ -426,3 +426,33 @@ void vm_and_word(vm_t *vm)
   vm_push_word(vm, DWORD(a & b));
 }
 
+void vm_xor_byte(vm_t *vm)
+{
+  if (vm->stack.ptr < 2)
+    // TODO: Error STACK_UNDERFLOW
+    return;
+  byte a = vm_pop_byte(vm).as_byte;
+  byte b = vm_pop_byte(vm).as_byte;
+  vm_push_byte(vm, DBYTE(a ^ b));
+}
+
+void vm_xor_hword(vm_t *vm)
+{
+  if (vm->stack.ptr < (HWORD_SIZE * 2))
+    // TODO: Error STACK_UNDERFLOW
+    return;
+  hword a = vm_pop_hword(vm).as_hword;
+  hword b = vm_pop_hword(vm).as_hword;
+  vm_push_hword(vm, DHWORD(a ^ b));
+}
+
+void vm_xor_word(vm_t *vm)
+{
+  if (vm->stack.ptr < (WORD_SIZE * 2))
+    // TODO: Error STACK_UNDERFLOW
+    return;
+  word a = vm_pop_word(vm).as_word;
+  word b = vm_pop_word(vm).as_word;
+  vm_push_word(vm, DWORD(a ^ b));
+}
+
diff --git a/src/runtime.h b/src/runtime.h
index 4ac475b..ea4edb9 100644
--- a/src/runtime.h
+++ b/src/runtime.h
@@ -131,4 +131,14 @@ static const and_f AND_ROUTINES[] = {
     [OP_AND_WORD]  = vm_and_word,
 };
 
+void vm_xor_byte(vm_t *);
+void vm_xor_hword(vm_t *);
+void vm_xor_word(vm_t *);
+typedef void (*xor_f)(vm_t *);
+static const xor_f XOR_ROUTINES[] = {
+    [OP_XOR_BYTE]  = vm_xor_byte,
+    [OP_XOR_HWORD] = vm_xor_hword,
+    [OP_XOR_WORD]  = vm_xor_word,
+};
+
 #endif