[+] AuRoundUpPow2

[+] AuRoundDownPow2

Include/auROXTL/auBitsUtils.hpp

@@ -176,7 +176,7 @@ static auline bool AuBitScanReverse(AuUInt8 &index, T value)
             ret = 63 - ret;
         }
     }
-    else if constexpr (sizeof(T) == sizeof(unsigned int))
+    else// if constexpr (sizeof(T) == sizeof(unsigned int))
     {
         ret = __builtin_clz(static_cast<unsigned int>(value));
         if constexpr (sizeof(unsigned int) == 4)

Include/auROXTL/auNumberUtils.hpp

@@ -38,3 +38,36 @@ constexpr const T AuPageRound(const T value, const T pageSize)
 {
     return value & ~(pageSize - 1);
 }
+
+// TODO: out of order
+#include "auBitsUtils.hpp"
+
+template <class T>
+const T AuRoundUpPow2(const T value)
+{
+    if constexpr (AuIsSame_v<T, AuUInt16>)
+    {
+        return AuRoundUpPow2<AuUInt32>(value);
+    }
+    else
+    {
+        AuUInt8 ret;
+        AuBitScanReverse(ret, value);
+        return T(1) << (ret + T(1));
+    }
+}
+
+template <class T>
+const T AuRoundDownPow2(const T value)
+{
+    if constexpr (AuIsSame_v<T, AuUInt16>)
+    {
+        return AuRoundDownPow2<AuUInt32>(value);
+    }
+    else
+    {
+        AuUInt8 ret;
+        AuBitScanReverse(ret, value);
+        return T(1) << ret;
+    }
+}