From 1f245b6b36e0d5357d4ee5b1bd3dcd8733a320c8 Mon Sep 17 00:00:00 2001
From: Dennis Sperzel <dennis.sperzel@informatik.hs-fulda.de>
Date: Tue, 6 Feb 2024 13:15:31 +0100
Subject: [PATCH] addition addition_float sum of two positiv integer

---
 src/addition.c | 37 +++++++++++++++++++++++++++++++++++--
 src/addition.h |  2 ++
 2 files changed, 37 insertions(+), 2 deletions(-)

diff --git a/src/addition.c b/src/addition.c
index e311e57..f1f626a 100644
--- a/src/addition.c
+++ b/src/addition.c
@@ -1,6 +1,19 @@
 #include "addition.h"
 #include <stdlib.h>
 
+// Struct for number in floating and integer 
+
+struct data
+{
+    union {
+        float floating;
+        unsigned int integer;
+    } number;
+    unsigned int s;
+    unsigned int e;
+    unsigned int p;
+};
+
 // full_adder is an implementation of two bit addition with carry
 
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry) {
@@ -48,7 +61,7 @@ unsigned int exponent(unsigned int number) {
     return (number & exponent) >> 23;
 }
 
-// adding two precision together with sum < 2^24
+// adding two precision together
 
 unsigned int addition_precision(unsigned int p1, unsigned int p2) {
     return addition(p1, p2);
@@ -65,5 +78,25 @@ unsigned int output(unsigned int sign, unsigned int exponent, unsigned int preci
 float addition_float(float number1, float number2) {
     if (number2 == (float) 0.0) return number1;
     else if (number1 == (float) 0.0) return number2;
-    return (float) 0.0;
+    else if (number2 > number1) return addition_float(number2, number1);
+
+    unsigned int e = 8388608;
+    struct data num1, num2, num3;
+    num1.number.floating = number1, num2.number.floating = number2;
+    num1.s = sign(num1.number.integer), num2.s = sign(num2.number.integer);
+    num1.e = exponent(num1.number.integer), num2.e = exponent(num2.number.integer);
+    num1.p = precision(num1.number.integer) | e, num2.p = precision(num2.number.integer) | e;
+
+    num3.p = addition_precision(num1.p, num2.p >> (num1.e - num2.e));
+    if (num3.p > 16777215) {
+        num3.e = addition(num1.e, 1);
+        num3.p = (num3.p >> 1); 
+    }
+    else {
+        num3.e = num1.e;
+    }
+    num3.p ^= e;
+    num3.number.integer = output(num1.s, num3.e, num3.p);
+
+    return num3.number.floating;
 }
\ No newline at end of file
diff --git a/src/addition.h b/src/addition.h
index fcbf305..9a42d6a 100644
--- a/src/addition.h
+++ b/src/addition.h
@@ -3,6 +3,8 @@
 
 typedef unsigned int num;
 
+struct data;
+
 void full_adder (num* sum, num* nextcarry, num number1, num number2, num carry);
 
 unsigned int addition(num number1, num number2);