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Fix invalid Math::RoundUpToPowerOf2

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#833
This commit is contained in:
Wojtek Figat
2022-11-24 20:20:36 +01:00
parent 76c1045444
commit 18c4e34af8
2 changed files with 33 additions and 16 deletions
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24
Source/Engine/Core/Math/Math.h
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@@ -214,11 +214,8 @@ namespace Math
/// <returns>The power of 2.</returns>
static int32 RoundUpToPowerOf2(int32 value)
{
// Source:
// http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
if (value < 0)
return 0;
value++;
// Source: http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value--;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
@@ -234,9 +231,8 @@ namespace Math
/// <returns>The power of 2.</returns>
static uint32 RoundUpToPowerOf2(uint32 value)
{
// Source:
// http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value++;
// Source: http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value--;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
@@ -252,11 +248,8 @@ namespace Math
/// <returns>The power of 2.</returns>
static int64 RoundUpToPowerOf2(int64 value)
{
// Source:
// http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
if (value < 0)
return 0;
value++;
// Source: http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value--;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;
@@ -273,9 +266,8 @@ namespace Math
/// <returns>The power of 2.</returns>
static uint64 RoundUpToPowerOf2(uint64 value)
{
// Source:
// http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value++;
// Source: http://graphics.stanford.edu/~seander/bithacks.html#RoundUpPowerOf2
value--;
value |= value >> 1;
value |= value >> 2;
value |= value >> 4;