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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
+
+
+////////////////////////////
+// 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 };
+ 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