From 9e9b0922bdec424e846cf5472c68d8aaa53600e4 Mon Sep 17 00:00:00 2001
From: baewoojin <dnwls514@ajou.ac.kr>
Date: Tue, 18 Aug 2020 17:38:12 +0900
Subject: [PATCH] Update README.md

---
 README.md | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/README.md b/README.md
index f0a71a6..7b7c56c 100644
--- a/README.md
+++ b/README.md
@@ -174,3 +174,25 @@
         ~~~
 
 # project - STEP 2
+### 1. list of functions
+- a. MUL ( x )
+- b. DIV ( / )
+- c. SINE
+
+### 2. explanation of fuctions
+- a. mul
+  - fx32_mul
+  ~~~
+  (fixed32)((fa * fb) >> FX32_QNUM ) 
+  ~~~
+    - fuction that multiplies fa and fb and divides it by 2^32
+  - fx32_mul1
+  ~~~
+  ((fixed32)(((fa>>16) * fb)>>16))
+  ~~~
+    - Same as fx32_mul, the same fuction as fa*fb>>32, first multiply fa/2^16 and fb, and divide the remaining 2^16
+  - fx32_mul2
+  ~~~
+  ((fixed32)(((fa>>8)*(fb>>8))>>16))
+  ~~~
+    - Same as above, the same fuction as fa*fb>>32, first multiply fa/2^8, fb/2^8, and divide the remaining 2^16
\ No newline at end of file
-- 
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