From 6bf70a4bcb5cf95cc0c74c877c59154863d4e3c7 Mon Sep 17 00:00:00 2001
From: Jamie Reece Wilson <me@reece.sx>
Date: Sat, 18 Nov 2023 02:02:34 +0000
Subject: [PATCH] [+] AuRoundUpPow2 [+] AuRoundDownPow2

---
 Include/auROXTL/auBitsUtils.hpp   |  2 +-
 Include/auROXTL/auNumberUtils.hpp | 33 +++++++++++++++++++++++++++++++
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/Include/auROXTL/auBitsUtils.hpp b/Include/auROXTL/auBitsUtils.hpp
index 4b7b6b6..06eac47 100644
--- a/Include/auROXTL/auBitsUtils.hpp
+++ b/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)
diff --git a/Include/auROXTL/auNumberUtils.hpp b/Include/auROXTL/auNumberUtils.hpp
index 0ea5663..48cf90d 100644
--- a/Include/auROXTL/auNumberUtils.hpp
+++ b/Include/auROXTL/auNumberUtils.hpp
@@ -37,4 +37,37 @@ template <class T>
 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;
+    }
 }
\ No newline at end of file