@@ -49,7 +49,19 @@ uint64_t exp16_table[21]={

  195360063,

  582360139072LL,

 };

+#if 1

+// 16.16 fixpoint exp()

+static unsigned int exp16(unsigned int a){

+    int i;

+    int out= 1<<16;

+

+    for(i=19;i>=0;i--){

+        if(a&(1<<i))

+            out= (out*exp16_table[i] + (1<<15))>>16;

+    }

+    return out;

+}

 // 16.16 fixpoint log()

 static int64_t log16(uint64_t a){

     int i;

@@ -68,6 +80,7 @@ static int64_t log16(uint64_t a){

     return out;

 }

+#endif

 static uint64_t int_sqrt(uint64_t a)

 {

     uint64_t ret=0;