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/**
* @file llvector4logical.h
* @brief LLVector4Logical class header file - Companion class to LLVector4a for logical and bit-twiddling operations
*
* $LicenseInfo:firstyear=2010&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2010, Linden Research, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation;
* version 2.1 of the License only.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA
* $/LicenseInfo$
*/
#ifndef LL_VECTOR4LOGICAL_H
#define LL_VECTOR4LOGICAL_H
#include "llmemory.h"
////////////////////////////
// LLVector4Logical
////////////////////////////
// This class is incomplete. If you need additional functionality,
// for example setting/unsetting particular elements or performing
// other boolean operations, feel free to implement. If you need
// assistance in determining the most optimal implementation,
// contact someone with SSE experience (Falcon, Richard, Davep, e.g.)
////////////////////////////
static LL_ALIGN_16(const U32 S_V4LOGICAL_MASK_TABLE[4*4]) =
{
0xFFFFFFFF, 0x00000000, 0x00000000, 0x00000000,
0x00000000, 0xFFFFFFFF, 0x00000000, 0x00000000,
0x00000000, 0x00000000, 0xFFFFFFFF, 0x00000000,
0x00000000, 0x00000000, 0x00000000, 0xFFFFFFFF
};
class LLVector4Logical
{
public:
enum {
MASK_X = 1,
MASK_Y = 1 << 1,
MASK_Z = 1 << 2,
MASK_W = 1 << 3,
MASK_XYZ = MASK_X | MASK_Y | MASK_Z,
MASK_XYZW = MASK_XYZ | MASK_W
};
// Empty default ctor
LLVector4Logical() {}
LLVector4Logical( const LLQuad& quad )
{
mQ = quad;
}
// Create and return a mask consisting of the lowest order bit of each element
inline U32 getGatheredBits() const
{
return _mm_movemask_ps(mQ);
};
// Invert this mask
inline LLVector4Logical& invert()
{
static const LL_ALIGN_16(U32 allOnes[4]) = { 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF };
ll_assert_aligned(allOnes,16);
mQ = _mm_andnot_ps( mQ, *(LLQuad*)(allOnes) );
return *this;
}
inline LLBool32 areAllSet( U32 mask ) const
{
return ( getGatheredBits() & mask) == mask;
}
inline LLBool32 areAllSet() const
{
return areAllSet( MASK_XYZW );
}
inline LLBool32 areAnySet( U32 mask ) const
{
return getGatheredBits() & mask;
}
inline LLBool32 areAnySet() const
{
return areAnySet( MASK_XYZW );
}
inline operator LLQuad() const
{
return mQ;
}
inline void clear()
{
mQ = _mm_setzero_ps();
}
template<int N> void setElement()
{
mQ = _mm_or_ps( mQ, *reinterpret_cast<const LLQuad*>(S_V4LOGICAL_MASK_TABLE + 4*N) );
}
private:
LLQuad mQ;
};
#endif //LL_VECTOR4ALOGICAL_H
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