From d78feb3dc84f8182526d525b097165d043e3ee06 Mon Sep 17 00:00:00 2001
From: baewoojin <dnwls514@ajou.ac.kr>
Date: Thu, 20 Aug 2020 16:12:57 +0900
Subject: [PATCH] Update README.md
---
testing/README.md | 40 +++++++++++++++++++++++++++++++++++-----
1 file changed, 35 insertions(+), 5 deletions(-)
diff --git a/testing/README.md b/testing/README.md
index 7e7a305..2fe8e84 100644
--- a/testing/README.md
+++ b/testing/README.md
@@ -25,8 +25,38 @@
- 2.1.1 list of fuctions
- 2.1.1.1 stpe 1
- a. add
- ~~~
- #define fx_add(a, b) ((a)+(b))
- ~~~
- - to add two fixed point numbers there is no need to conversion of data type
- - just add two fixed point numbers and return result
\ No newline at end of file
+ ~~~
+ #define fx_add(a, b) ((a)+(b))
+ ~~~
+ - to add two fixed point numbers there is no need to conversion of data type
+ - just add two fixed point numbers and return result
+ - b. sub
+ ~~~
+ #define fx_sub(a, b) ((a)-(b))
+ ~~~
+ - to sub one fixed point number from another fixed point number there is no need to conversion of data type.
+ - just operate function without conversion of data type and return result
+ - c. mul
+ ~~~
+ #define fx_mul(a, b) double_to_fx(fx_to_double (a) * fx_to_double (b))
+ ~~~
+ - to mul two fixed pouint number shoul do type conversion
+ - first convert two fixed point number to double type and do mul operation
+ - second result calculated from first step should be converted to fixed point number(type conversion)
+ - d. div
+ ~~~
+ #define fx_div(a, b) double_to_fx(fx_to_double (a) / fx_to_double (b))
+ ~~~
+ - to div two fixed pouint number shoul do type conversion
+ - first convert two fixed point number to double type and do div operation
+ - second result calculated from first step should be converted to fixed point number(type conversion)
+ - e. fixed -> double
+ ~~~
+ #define fx_to_double(a) (a/P2_2to32)
+ ~~~
+ - to convert fixed point to double should divide fixed point number by 2^32(s31(32)=>decimal part bits)
+ - f. double -> fixed
+ ~~~
+ #define double_to_fx(a) (long long)(a*P2_2to32)
+ ~~~
+ - to convert double to fixed point should multiply double number and 2^32(s31(32)=>decimal part bits)
\ No newline at end of file
--
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