add

.gitignore

@@ -0,0 +1,6 @@
+
+.vscode/
+
+build/
+
+release/

test/main.cpp

@@ -1,11 +1,31 @@
 #include<stdlib.h> 
 #include<stdio.h>
 #include "common.h"
+typedef uint64_t u64 ;
+static u64 be64_to_cpu(u64 x)
+{
+	u64 r;
+	int i, len;
+	char *p, *q;
 
+	len = sizeof(x);
+	q = (char *)&x + len - 1;
+	p = (char *)&r;
 
+	for (i = 0; i < len; i++)
+	{
+		*p = *q;
+		p++;
+		q--;
+	}
+
+	return r;
+}
 
 int main(){
-	
+	u64 rt,data=0xFFF;
+	rt=be64_to_cpu(data);
+
 	return 0;
 }