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// This file is part of Eigen, a lightweight C++ template library
// for linear algebra. Eigen itself is part of the KDE project.
//
// Copyright (C) 2008 Konstantinos Margaritis <markos@codex.gr>
// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
//
// Eigen 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; either
// version 3 of the License, or (at your option) any later version.
//
// Alternatively, you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Eigen 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 or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#ifndef EIGEN_PACKET_MATH_ALTIVEC_H
#define EIGEN_PACKET_MATH_ALTIVEC_H
#ifndef EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD
#define EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD 4
#endif
static const vector int v0i = vec_splat_u32(0);
static const vector int v16i_ = vec_splat_u32(-16);
static const vector float v0f = (vector float) v0i;
template<> struct ei_packet_traits<float> { typedef vector float type; enum {size=4}; };
template<> struct ei_packet_traits<int> { typedef vector int type; enum {size=4}; };
inline vector float ei_padd(const vector float a, const vector float b) { return vec_add(a,b); }
inline vector int ei_padd(const vector int a, const vector int b) { return vec_add(a,b); }
inline vector float ei_psub(const vector float a, const vector float b) { return vec_sub(a,b); }
inline vector int ei_psub(const vector int a, const vector int b) { return vec_sub(a,b); }
inline vector float ei_pmul(const vector float a, const vector float b) { return vec_madd(a,b, v0f); }
inline vector int ei_pmul(const vector int a, const vector int b)
{
// Taken from http://
//Set up constants
vector int bswap, lowProduct, highProduct;
//Do real work
bswap = vec_rl( (vector unsigned int)b, (vector unsigned int)v16i_ );
lowProduct = vec_mulo( (vector short)a,(vector short)b );
highProduct = vec_msum((vector short)a,(vector short)bswap, v0i);
highProduct = vec_sl( (vector unsigned int)highProduct, (vector unsigned int)v16i_ );
return vec_add( lowProduct, highProduct );
}
inline vector float ei_pmadd(const vector float a, const vector float b, const vector float c) { return vec_madd(a, b, c); }
inline vector float ei_pmin(const vector float a, const vector float b) { return vec_min(a,b); }
inline vector int ei_pmin(const vector int a, const vector int b) { return vec_min(a,b); }
inline vector float ei_pmax(const vector float a, const vector float b) { return vec_max(a,b); }
inline vector int ei_pmax(const vector int a, const vector int b) { return vec_max(a,b); }
inline vector float ei_pload(const float* from) { return vec_ld(0, from); }
inline vector int ei_pload(const int* from) { return vec_ld(0, from); }
inline vector float ei_pset1(const float& from)
{
static float __attribute__(aligned(16)) af[4];
af[0] = from;
vector float vc = vec_ld(0, af);
vc = vec_splat(vc, 0);
return vc;
}
inline vector int ei_pset1(const int& from)
{
static int __attribute__(aligned(16)) ai[4];
ai[0] = from;
vector int vc = vec_ld(0, ai);
vc = vec_splat(vc, 0);
return vc;
}
inline void ei_pstore(float* to, const vector float from) { vec_st(from, 0, to); }
inline void ei_pstore(int* to, const vector int from) { vec_st(from, 0, to); }
inline float ei_pfirst(const vector float a)
{
static float __attribute__(aligned(16)) af[4];
vec_st(a, 0, af);
return af[0];
}
inline int ei_pfirst(const vector int a)
{
static int __attribute__(aligned(16)) ai[4];
vec_st(a, 0, ai);
return ai[0];
}
#endif // EIGEN_PACKET_MATH_ALTIVEC_H
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