From 8289b8e39402dab1d82d222149d8857e8e9b28ee Mon Sep 17 00:00:00 2001
From: KimNayoung <skdud1201@ajou.ac.kr>
Date: Sun, 30 Jan 2022 04:11:20 +0900
Subject: [PATCH] lec12
---
lec12/fx_s17_14.c | 100 +++++++++++++++++++++++++++++++++++++++++++
lec12/fx_s17_14.h | 37 ++++++++++++++++
lec12/project_main.c | 11 +++++
3 files changed, 148 insertions(+)
create mode 100644 lec12/fx_s17_14.c
create mode 100644 lec12/fx_s17_14.h
create mode 100644 lec12/project_main.c
diff --git a/lec12/fx_s17_14.c b/lec12/fx_s17_14.c
new file mode 100644
index 0000000..b8e3b4b
--- /dev/null
+++ b/lec12/fx_s17_14.c
@@ -0,0 +1,100 @@
+#include "fx_head.h"
+#include "fx_s17_14.h"
+
+#define fxADD(a,b) ((a)+(b))
+#define FX_Q_NUM_H (FX_Q_NUM/2)
+#define FX_Q_NUM_HA (FX_Q_NUM_H-FX_Q_NUM_H/2)
+#define FX_Q_NUM_HB (FX_Q_NUM_H/2)
+/*
+extern fixed fxAdd_float(), fxAdd_precision(), fxAdd_fair(), fxAdd_performance();
+extern fixed fxSub_float(), fxSub_precision(), fxSub_fair(), fxSub_performance();
+extern fixed fxMul_float(), fxMul_precision(), fxMul_fair(), fxMul_performance();
+extern fixed fxDiv_float(), fxDiv_precision(), fxDiv_fair(), fxDiv_performance();
+*/
+
+// float function
+fixed fxAdd_float(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) + toFloat(b));
+}
+
+fixed fxSub_float(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) - toFloat(b));
+}
+
+fixed fxMul_float(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) * toFloat(b));
+}
+
+fixed fxDiv_float(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) / toFloat(b));
+}
+
+// precision function
+fixed fxAdd_precision(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) + toFloat(b));
+}
+
+fixed fxSub_precision(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) - toFloat(b));
+}
+
+fixed fxMul_precision(fixed a, fixed b)
+{
+ long long la=a, lb=b, lc;
+ lc = la*lb; //오버플로우가 발생하지 않는다는 장점
+ lc >>= FX_Q_NUM;
+ return (fixed) lc;
+}
+
+fixed fxDiv_precision(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) / toFloat(b));
+}
+
+// fair function
+fixed fxAdd_fair(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) + toFloat(b));
+}
+
+fixed fxSub_fair(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) - toFloat(b));
+}
+
+fixed fxMul_fair(fixed a, fixed b)
+{
+ return ((a>>FX_Q_NUM_HA)*(b>>FX_Q_NUM_HB))>>FX_Q_NUM_H;
+}
+
+fixed fxDiv_fair(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) / toFloat(b));
+}
+
+// performance function
+fixed fxAdd_performance(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) + toFloat(b));
+}
+
+fixed fxSub_performance(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) - toFloat(b));
+}
+
+fixed fxMul_performance(fixed a, fixed b)
+{
+ return (a>>FX_Q_NUM_H)*(b>>FX_Q_NUM_H);
+}
+
+fixed fxDiv_performance(fixed a, fixed b)
+{
+ return fromFloat(toFloat(a) / toFloat(b));
+}
diff --git a/lec12/fx_s17_14.h b/lec12/fx_s17_14.h
new file mode 100644
index 0000000..c7900f1
--- /dev/null
+++ b/lec12/fx_s17_14.h
@@ -0,0 +1,37 @@
+#include "fx_head.h"
+#include <math.h>
+
+#define FX_POINT FX_S17_14
+
+#define FX_Q_NUM (FX_POINT & 0xFF) // 14
+
+// If you want calculate with high precision set 64
+#define FX_SYSTEM_INTEGER 64 // 32 or 64
+#define FX_SYSTEM_FLOAT 64 // 32 or 64
+
+#define FX_DATA_TYPE signed int
+
+
+typedef int fx_s17_14;
+typedef fx_s17_14 fixed;
+
+#define fromDouble(d) ((fixed)((d)*DOUBLE_Q_VALUE))
+#define toDouble(d) ((double)(d)*DOUBLE_1_Q_VALUE)
+#define fromFloat(d) ((fixed)((d)*FLOAT_Q_VALUE))
+#define toFloat(d) ((float)(d)*FLOAT_1_Q_VALUE)
+
+// CONSTANTS
+#define FLOAT_Q_VALUE (float)(1<<FX_Q_NUM)
+#define DOUBLE_Q_VALUE (double)(1<<FX_Q_NUM)
+#define FLOAT_1_Q_VALUE (float)(1.0f/FLOAT_Q_VALUE)
+#define DOUBLE_1_Q_VALUE (double)(1.0f/DOUBLE_Q_VALUE)
+#define FX_PI fromDOUBLE(M_PI)
+
+// One of FX_OP_FLOAT, FX_OP_PRECISION, FX_OP_FAIR, FX_OP_PERFORMANCE
+#define FX_OP_PREFERENCE FX_OP_FLOAT
+
+extern fixed fxAdd_float(), fxAdd_precision(), fxAdd_fair(), fxAdd_performance();
+extern fixed fxSub_float(), fxSub_precision(), fxSub_fair(), fxSub_performance();
+extern fixed fxMul_float(), fxMul_precision(), fxMul_fair(), fxMul_performance();
+extern fixed fxDiv_float(), fxDiv_precision(), fxDiv_fair(), fxDiv_performance();
+
diff --git a/lec12/project_main.c b/lec12/project_main.c
new file mode 100644
index 0000000..15694be
--- /dev/null
+++ b/lec12/project_main.c
@@ -0,0 +1,11 @@
+#include "fx_s17_14.h"
+#include <stdio.h>
+
+
+int main()
+{
+
+ printf("%f : %d\n",1.0, fromDouble(1.0));
+ printf("%f : %f\n",1.3*0.3, toFloat(fxMul_float(fromDouble(1.3),fromDouble(0.3)))) ;
+
+}
--
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