| // This file is part of Eigen, a lightweight C++ template library |
| // for linear algebra. |
| // |
| // Copyright (C) 2010 Gael Guennebaud <gael.guennebaud@inria.fr> |
| // |
| // This Source Code Form is subject to the terms of the Mozilla |
| // Public License v. 2.0. If a copy of the MPL was not distributed |
| // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
| |
| #ifndef EIGEN_COMPLEX_ALTIVEC_H |
| #define EIGEN_COMPLEX_ALTIVEC_H |
| |
| namespace Eigen { |
| |
| namespace internal { |
| |
| static Packet4ui p4ui_CONJ_XOR = vec_mergeh((Packet4ui)p4i_ZERO, (Packet4ui)p4f_ZERO_);//{ 0x00000000, 0x80000000, 0x00000000, 0x80000000 }; |
| static Packet16uc p16uc_COMPLEX_RE = vec_sld((Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 0), (Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 2), 8);//{ 0,1,2,3, 0,1,2,3, 8,9,10,11, 8,9,10,11 }; |
| static Packet16uc p16uc_COMPLEX_IM = vec_sld((Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 1), (Packet16uc) vec_splat((Packet4ui)p16uc_FORWARD, 3), 8);//{ 4,5,6,7, 4,5,6,7, 12,13,14,15, 12,13,14,15 }; |
| static Packet16uc p16uc_COMPLEX_REV = vec_sld(p16uc_REVERSE, p16uc_REVERSE, 8);//{ 4,5,6,7, 0,1,2,3, 12,13,14,15, 8,9,10,11 }; |
| static Packet16uc p16uc_COMPLEX_REV2 = vec_sld(p16uc_FORWARD, p16uc_FORWARD, 8);//{ 8,9,10,11, 12,13,14,15, 0,1,2,3, 4,5,6,7 }; |
| static Packet16uc p16uc_PSET_HI = (Packet16uc) vec_mergeh((Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 0), (Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 1));//{ 0,1,2,3, 4,5,6,7, 0,1,2,3, 4,5,6,7 }; |
| static Packet16uc p16uc_PSET_LO = (Packet16uc) vec_mergeh((Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 2), (Packet4ui) vec_splat((Packet4ui)p16uc_FORWARD, 3));//{ 8,9,10,11, 12,13,14,15, 8,9,10,11, 12,13,14,15 }; |
| |
| //---------- float ---------- |
| struct Packet2cf |
| { |
| EIGEN_STRONG_INLINE Packet2cf() {} |
| EIGEN_STRONG_INLINE explicit Packet2cf(const Packet4f& a) : v(a) {} |
| Packet4f v; |
| }; |
| |
| template<> struct packet_traits<std::complex<float> > : default_packet_traits |
| { |
| typedef Packet2cf type; |
| enum { |
| Vectorizable = 1, |
| AlignedOnScalar = 1, |
| size = 2, |
| |
| HasAdd = 1, |
| HasSub = 1, |
| HasMul = 1, |
| HasDiv = 1, |
| HasNegate = 1, |
| HasAbs = 0, |
| HasAbs2 = 0, |
| HasMin = 0, |
| HasMax = 0, |
| HasSetLinear = 0 |
| }; |
| }; |
| |
| template<> struct unpacket_traits<Packet2cf> { typedef std::complex<float> type; enum {size=2}; }; |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pset1<Packet2cf>(const std::complex<float>& from) |
| { |
| Packet2cf res; |
| /* On AltiVec we cannot load 64-bit registers, so wa have to take care of alignment */ |
| if((ptrdiff_t(&from) % 16) == 0) |
| res.v = pload<Packet4f>((const float *)&from); |
| else |
| res.v = ploadu<Packet4f>((const float *)&from); |
| res.v = vec_perm(res.v, res.v, p16uc_PSET_HI); |
| return res; |
| } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf padd<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_add(a.v,b.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf psub<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_sub(a.v,b.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf pnegate(const Packet2cf& a) { return Packet2cf(pnegate(a.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf pconj(const Packet2cf& a) { return Packet2cf((Packet4f)vec_xor((Packet4ui)a.v, p4ui_CONJ_XOR)); } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pmul<Packet2cf>(const Packet2cf& a, const Packet2cf& b) |
| { |
| Packet4f v1, v2; |
| |
| // Permute and multiply the real parts of a and b |
| v1 = vec_perm(a.v, a.v, p16uc_COMPLEX_RE); |
| // Get the imaginary parts of a |
| v2 = vec_perm(a.v, a.v, p16uc_COMPLEX_IM); |
| // multiply a_re * b |
| v1 = vec_madd(v1, b.v, p4f_ZERO); |
| // multiply a_im * b and get the conjugate result |
| v2 = vec_madd(v2, b.v, p4f_ZERO); |
| v2 = (Packet4f) vec_xor((Packet4ui)v2, p4ui_CONJ_XOR); |
| // permute back to a proper order |
| v2 = vec_perm(v2, v2, p16uc_COMPLEX_REV); |
| |
| return Packet2cf(vec_add(v1, v2)); |
| } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pand <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_and(a.v,b.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf por <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_or(a.v,b.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf pxor <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_xor(a.v,b.v)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf pandnot<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_and(a.v, vec_nor(b.v,b.v))); } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pload <Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_ALIGNED_LOAD return Packet2cf(pload<Packet4f>((const float*)from)); } |
| template<> EIGEN_STRONG_INLINE Packet2cf ploadu<Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_UNALIGNED_LOAD return Packet2cf(ploadu<Packet4f>((const float*)from)); } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf ploaddup<Packet2cf>(const std::complex<float>* from) |
| { |
| return pset1<Packet2cf>(*from); |
| } |
| |
| template<> EIGEN_STRONG_INLINE void pstore <std::complex<float> >(std::complex<float> * to, const Packet2cf& from) { EIGEN_DEBUG_ALIGNED_STORE pstore((float*)to, from.v); } |
| template<> EIGEN_STRONG_INLINE void pstoreu<std::complex<float> >(std::complex<float> * to, const Packet2cf& from) { EIGEN_DEBUG_UNALIGNED_STORE pstoreu((float*)to, from.v); } |
| |
| template<> EIGEN_STRONG_INLINE void prefetch<std::complex<float> >(const std::complex<float> * addr) { vec_dstt((float *)addr, DST_CTRL(2,2,32), DST_CHAN); } |
| |
| template<> EIGEN_STRONG_INLINE std::complex<float> pfirst<Packet2cf>(const Packet2cf& a) |
| { |
| std::complex<float> EIGEN_ALIGN16 res[2]; |
| pstore((float *)&res, a.v); |
| |
| return res[0]; |
| } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf preverse(const Packet2cf& a) |
| { |
| Packet4f rev_a; |
| rev_a = vec_perm(a.v, a.v, p16uc_COMPLEX_REV2); |
| return Packet2cf(rev_a); |
| } |
| |
| template<> EIGEN_STRONG_INLINE std::complex<float> predux<Packet2cf>(const Packet2cf& a) |
| { |
| Packet4f b; |
| b = (Packet4f) vec_sld(a.v, a.v, 8); |
| b = padd(a.v, b); |
| return pfirst(Packet2cf(b)); |
| } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf preduxp<Packet2cf>(const Packet2cf* vecs) |
| { |
| Packet4f b1, b2; |
| |
| b1 = (Packet4f) vec_sld(vecs[0].v, vecs[1].v, 8); |
| b2 = (Packet4f) vec_sld(vecs[1].v, vecs[0].v, 8); |
| b2 = (Packet4f) vec_sld(b2, b2, 8); |
| b2 = padd(b1, b2); |
| |
| return Packet2cf(b2); |
| } |
| |
| template<> EIGEN_STRONG_INLINE std::complex<float> predux_mul<Packet2cf>(const Packet2cf& a) |
| { |
| Packet4f b; |
| Packet2cf prod; |
| b = (Packet4f) vec_sld(a.v, a.v, 8); |
| prod = pmul(a, Packet2cf(b)); |
| |
| return pfirst(prod); |
| } |
| |
| template<int Offset> |
| struct palign_impl<Offset,Packet2cf> |
| { |
| static EIGEN_STRONG_INLINE void run(Packet2cf& first, const Packet2cf& second) |
| { |
| if (Offset==1) |
| { |
| first.v = vec_sld(first.v, second.v, 8); |
| } |
| } |
| }; |
| |
| template<> struct conj_helper<Packet2cf, Packet2cf, false,true> |
| { |
| EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
| { return padd(pmul(x,y),c); } |
| |
| EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
| { |
| return internal::pmul(a, pconj(b)); |
| } |
| }; |
| |
| template<> struct conj_helper<Packet2cf, Packet2cf, true,false> |
| { |
| EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
| { return padd(pmul(x,y),c); } |
| |
| EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
| { |
| return internal::pmul(pconj(a), b); |
| } |
| }; |
| |
| template<> struct conj_helper<Packet2cf, Packet2cf, true,true> |
| { |
| EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
| { return padd(pmul(x,y),c); } |
| |
| EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
| { |
| return pconj(internal::pmul(a, b)); |
| } |
| }; |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pdiv<Packet2cf>(const Packet2cf& a, const Packet2cf& b) |
| { |
| // TODO optimize it for AltiVec |
| Packet2cf res = conj_helper<Packet2cf,Packet2cf,false,true>().pmul(a,b); |
| Packet4f s = vec_madd(b.v, b.v, p4f_ZERO); |
| return Packet2cf(pdiv(res.v, vec_add(s,vec_perm(s, s, p16uc_COMPLEX_REV)))); |
| } |
| |
| template<> EIGEN_STRONG_INLINE Packet2cf pcplxflip<Packet2cf>(const Packet2cf& x) |
| { |
| return Packet2cf(vec_perm(x.v, x.v, p16uc_COMPLEX_REV)); |
| } |
| |
| } // end namespace internal |
| |
| } // end namespace Eigen |
| |
| #endif // EIGEN_COMPLEX_ALTIVEC_H |