1 files changed, 23 insertions, 0 deletions
diff --git a/3/5_arith_and_logic/reverse_assemble.c b/3/5_arith_and_logic/reverse_assemble.c
new file mode 100644
index 0000000..6413f98
--- /dev/null
+++ b/3/5_arith_and_logic/reverse_assemble.c
@@ -0,0 +1,23 @@
+#include <stdio.h>
+
+/*
+ * x in %rdi, y in %rsi, z in %rdx
+ * arith3:
+ *   orq %rsi, %rdx
+ *   sarq $9, %rdx
+ *   notq %rdx
+ *   movq %rdx, %bax <------- what is this register??
+ *   subq %rsi, %rbx
+ *   ret
+ */
+short arith3(short x, short y, short z) {
+    short p1 = z | y;
+    short p2 = p1>>9;
+    short p3 = ~p2;
+    short p4 = p3;
+    return p4;
+}
+
+int main() {
+
+}