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D3D: Replaced explicit _BitScanForward with LeastSignificantSetBit

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This commit is contained in:
Yuriy O'Donnell 2015-04-29 23:52:49 +02:00
parent 2b664f5d89
commit df5750edfd
1 changed files with 6 additions and 13 deletions
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19
Source/Core/VideoBackends/D3D/D3DState.cpp
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@ -2,6 +2,7 @@
// Licensed under GPLv2
// Refer to the license.txt file included.
#include "Common/BitSet.h"
#include "Common/Logging/Log.h"
#include "VideoBackends/D3D/D3DBase.h"
@ -87,11 +88,8 @@ void StateManager::Apply()
return;
}
unsigned long textureMaskShift;
_BitScanForward(&textureMaskShift, DirtyFlag_Texture0);
unsigned long samplerMaskShift;
_BitScanForward(&samplerMaskShift, DirtyFlag_Sampler0);
int textureMaskShift = LeastSignificantSetBit((u32)DirtyFlag_Texture0);
int samplerMaskShift = LeastSignificantSetBit((u32)DirtyFlag_Sampler0);
u32 dirtyTextures = (m_dirtyFlags & (DirtyFlag_Texture0 | DirtyFlag_Texture1 | DirtyFlag_Texture2 | DirtyFlag_Texture3
| DirtyFlag_Texture4 | DirtyFlag_Texture5 | DirtyFlag_Texture6 | DirtyFlag_Texture7)) >> textureMaskShift;
@ -157,9 +155,7 @@ void StateManager::Apply()
while (dirtyTextures)
{
unsigned long index;
_BitScanForward(&index, dirtyTextures);
int index = LeastSignificantSetBit(dirtyTextures);
if (m_current.textures[index] != m_pending.textures[index])
{
D3D::context->PSSetShaderResources(index, 1, &m_pending.textures[index]);
@ -171,9 +167,7 @@ void StateManager::Apply()
while (dirtySamplers)
{
unsigned long index;
_BitScanForward(&index, dirtySamplers);
int index = LeastSignificantSetBit(dirtySamplers);
if (m_current.samplers[index] != m_pending.samplers[index])
{
D3D::context->PSSetSamplers(index, 1, &m_pending.samplers[index]);
@ -227,8 +221,7 @@ void StateManager::SetTextureByMask(u32 textureSlotMask, ID3D11ShaderResourceVie
{
while (textureSlotMask)
{
unsigned long index;
_BitScanForward(&index, textureSlotMask);
int index = LeastSignificantSetBit(textureSlotMask);
SetTexture(index, srv);
textureSlotMask &= ~(1 << index);
}