/** * @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