1 | // This file is part of Eigen, a lightweight C++ template library |
---|
2 | // for linear algebra. |
---|
3 | // |
---|
4 | // Copyright (C) 2010 Gael Guennebaud <gael.guennebaud@inria.fr> |
---|
5 | // |
---|
6 | // This Source Code Form is subject to the terms of the Mozilla |
---|
7 | // Public License v. 2.0. If a copy of the MPL was not distributed |
---|
8 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/. |
---|
9 | |
---|
10 | #ifndef EIGEN_COMPLEX_ALTIVEC_H |
---|
11 | #define EIGEN_COMPLEX_ALTIVEC_H |
---|
12 | |
---|
13 | namespace Eigen { |
---|
14 | |
---|
15 | namespace internal { |
---|
16 | |
---|
17 | static Packet4ui p4ui_CONJ_XOR = vec_mergeh((Packet4ui)p4i_ZERO, (Packet4ui)p4f_ZERO_);//{ 0x00000000, 0x80000000, 0x00000000, 0x80000000 }; |
---|
18 | 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 }; |
---|
19 | 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 }; |
---|
20 | 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 }; |
---|
21 | 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 }; |
---|
22 | 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 }; |
---|
23 | 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 }; |
---|
24 | |
---|
25 | //---------- float ---------- |
---|
26 | struct Packet2cf |
---|
27 | { |
---|
28 | EIGEN_STRONG_INLINE Packet2cf() {} |
---|
29 | EIGEN_STRONG_INLINE explicit Packet2cf(const Packet4f& a) : v(a) {} |
---|
30 | Packet4f v; |
---|
31 | }; |
---|
32 | |
---|
33 | template<> struct packet_traits<std::complex<float> > : default_packet_traits |
---|
34 | { |
---|
35 | typedef Packet2cf type; |
---|
36 | enum { |
---|
37 | Vectorizable = 1, |
---|
38 | AlignedOnScalar = 1, |
---|
39 | size = 2, |
---|
40 | |
---|
41 | HasAdd = 1, |
---|
42 | HasSub = 1, |
---|
43 | HasMul = 1, |
---|
44 | HasDiv = 1, |
---|
45 | HasNegate = 1, |
---|
46 | HasAbs = 0, |
---|
47 | HasAbs2 = 0, |
---|
48 | HasMin = 0, |
---|
49 | HasMax = 0, |
---|
50 | HasSetLinear = 0 |
---|
51 | }; |
---|
52 | }; |
---|
53 | |
---|
54 | template<> struct unpacket_traits<Packet2cf> { typedef std::complex<float> type; enum {size=2}; }; |
---|
55 | |
---|
56 | template<> EIGEN_STRONG_INLINE Packet2cf pset1<Packet2cf>(const std::complex<float>& from) |
---|
57 | { |
---|
58 | Packet2cf res; |
---|
59 | /* On AltiVec we cannot load 64-bit registers, so wa have to take care of alignment */ |
---|
60 | if((ptrdiff_t(&from) % 16) == 0) |
---|
61 | res.v = pload<Packet4f>((const float *)&from); |
---|
62 | else |
---|
63 | res.v = ploadu<Packet4f>((const float *)&from); |
---|
64 | res.v = vec_perm(res.v, res.v, p16uc_PSET_HI); |
---|
65 | return res; |
---|
66 | } |
---|
67 | |
---|
68 | template<> EIGEN_STRONG_INLINE Packet2cf padd<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_add(a.v,b.v)); } |
---|
69 | template<> EIGEN_STRONG_INLINE Packet2cf psub<Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_sub(a.v,b.v)); } |
---|
70 | template<> EIGEN_STRONG_INLINE Packet2cf pnegate(const Packet2cf& a) { return Packet2cf(pnegate(a.v)); } |
---|
71 | template<> EIGEN_STRONG_INLINE Packet2cf pconj(const Packet2cf& a) { return Packet2cf((Packet4f)vec_xor((Packet4ui)a.v, p4ui_CONJ_XOR)); } |
---|
72 | |
---|
73 | template<> EIGEN_STRONG_INLINE Packet2cf pmul<Packet2cf>(const Packet2cf& a, const Packet2cf& b) |
---|
74 | { |
---|
75 | Packet4f v1, v2; |
---|
76 | |
---|
77 | // Permute and multiply the real parts of a and b |
---|
78 | v1 = vec_perm(a.v, a.v, p16uc_COMPLEX_RE); |
---|
79 | // Get the imaginary parts of a |
---|
80 | v2 = vec_perm(a.v, a.v, p16uc_COMPLEX_IM); |
---|
81 | // multiply a_re * b |
---|
82 | v1 = vec_madd(v1, b.v, p4f_ZERO); |
---|
83 | // multiply a_im * b and get the conjugate result |
---|
84 | v2 = vec_madd(v2, b.v, p4f_ZERO); |
---|
85 | v2 = (Packet4f) vec_xor((Packet4ui)v2, p4ui_CONJ_XOR); |
---|
86 | // permute back to a proper order |
---|
87 | v2 = vec_perm(v2, v2, p16uc_COMPLEX_REV); |
---|
88 | |
---|
89 | return Packet2cf(vec_add(v1, v2)); |
---|
90 | } |
---|
91 | |
---|
92 | template<> EIGEN_STRONG_INLINE Packet2cf pand <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_and(a.v,b.v)); } |
---|
93 | template<> EIGEN_STRONG_INLINE Packet2cf por <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_or(a.v,b.v)); } |
---|
94 | template<> EIGEN_STRONG_INLINE Packet2cf pxor <Packet2cf>(const Packet2cf& a, const Packet2cf& b) { return Packet2cf(vec_xor(a.v,b.v)); } |
---|
95 | 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))); } |
---|
96 | |
---|
97 | template<> EIGEN_STRONG_INLINE Packet2cf pload <Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_ALIGNED_LOAD return Packet2cf(pload<Packet4f>((const float*)from)); } |
---|
98 | template<> EIGEN_STRONG_INLINE Packet2cf ploadu<Packet2cf>(const std::complex<float>* from) { EIGEN_DEBUG_UNALIGNED_LOAD return Packet2cf(ploadu<Packet4f>((const float*)from)); } |
---|
99 | |
---|
100 | template<> EIGEN_STRONG_INLINE Packet2cf ploaddup<Packet2cf>(const std::complex<float>* from) |
---|
101 | { |
---|
102 | return pset1<Packet2cf>(*from); |
---|
103 | } |
---|
104 | |
---|
105 | 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); } |
---|
106 | 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); } |
---|
107 | |
---|
108 | 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); } |
---|
109 | |
---|
110 | template<> EIGEN_STRONG_INLINE std::complex<float> pfirst<Packet2cf>(const Packet2cf& a) |
---|
111 | { |
---|
112 | std::complex<float> EIGEN_ALIGN16 res[2]; |
---|
113 | pstore((float *)&res, a.v); |
---|
114 | |
---|
115 | return res[0]; |
---|
116 | } |
---|
117 | |
---|
118 | template<> EIGEN_STRONG_INLINE Packet2cf preverse(const Packet2cf& a) |
---|
119 | { |
---|
120 | Packet4f rev_a; |
---|
121 | rev_a = vec_perm(a.v, a.v, p16uc_COMPLEX_REV2); |
---|
122 | return Packet2cf(rev_a); |
---|
123 | } |
---|
124 | |
---|
125 | template<> EIGEN_STRONG_INLINE std::complex<float> predux<Packet2cf>(const Packet2cf& a) |
---|
126 | { |
---|
127 | Packet4f b; |
---|
128 | b = (Packet4f) vec_sld(a.v, a.v, 8); |
---|
129 | b = padd(a.v, b); |
---|
130 | return pfirst(Packet2cf(b)); |
---|
131 | } |
---|
132 | |
---|
133 | template<> EIGEN_STRONG_INLINE Packet2cf preduxp<Packet2cf>(const Packet2cf* vecs) |
---|
134 | { |
---|
135 | Packet4f b1, b2; |
---|
136 | |
---|
137 | b1 = (Packet4f) vec_sld(vecs[0].v, vecs[1].v, 8); |
---|
138 | b2 = (Packet4f) vec_sld(vecs[1].v, vecs[0].v, 8); |
---|
139 | b2 = (Packet4f) vec_sld(b2, b2, 8); |
---|
140 | b2 = padd(b1, b2); |
---|
141 | |
---|
142 | return Packet2cf(b2); |
---|
143 | } |
---|
144 | |
---|
145 | template<> EIGEN_STRONG_INLINE std::complex<float> predux_mul<Packet2cf>(const Packet2cf& a) |
---|
146 | { |
---|
147 | Packet4f b; |
---|
148 | Packet2cf prod; |
---|
149 | b = (Packet4f) vec_sld(a.v, a.v, 8); |
---|
150 | prod = pmul(a, Packet2cf(b)); |
---|
151 | |
---|
152 | return pfirst(prod); |
---|
153 | } |
---|
154 | |
---|
155 | template<int Offset> |
---|
156 | struct palign_impl<Offset,Packet2cf> |
---|
157 | { |
---|
158 | static EIGEN_STRONG_INLINE void run(Packet2cf& first, const Packet2cf& second) |
---|
159 | { |
---|
160 | if (Offset==1) |
---|
161 | { |
---|
162 | first.v = vec_sld(first.v, second.v, 8); |
---|
163 | } |
---|
164 | } |
---|
165 | }; |
---|
166 | |
---|
167 | template<> struct conj_helper<Packet2cf, Packet2cf, false,true> |
---|
168 | { |
---|
169 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
---|
170 | { return padd(pmul(x,y),c); } |
---|
171 | |
---|
172 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
---|
173 | { |
---|
174 | return internal::pmul(a, pconj(b)); |
---|
175 | } |
---|
176 | }; |
---|
177 | |
---|
178 | template<> struct conj_helper<Packet2cf, Packet2cf, true,false> |
---|
179 | { |
---|
180 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
---|
181 | { return padd(pmul(x,y),c); } |
---|
182 | |
---|
183 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
---|
184 | { |
---|
185 | return internal::pmul(pconj(a), b); |
---|
186 | } |
---|
187 | }; |
---|
188 | |
---|
189 | template<> struct conj_helper<Packet2cf, Packet2cf, true,true> |
---|
190 | { |
---|
191 | EIGEN_STRONG_INLINE Packet2cf pmadd(const Packet2cf& x, const Packet2cf& y, const Packet2cf& c) const |
---|
192 | { return padd(pmul(x,y),c); } |
---|
193 | |
---|
194 | EIGEN_STRONG_INLINE Packet2cf pmul(const Packet2cf& a, const Packet2cf& b) const |
---|
195 | { |
---|
196 | return pconj(internal::pmul(a, b)); |
---|
197 | } |
---|
198 | }; |
---|
199 | |
---|
200 | template<> EIGEN_STRONG_INLINE Packet2cf pdiv<Packet2cf>(const Packet2cf& a, const Packet2cf& b) |
---|
201 | { |
---|
202 | // TODO optimize it for AltiVec |
---|
203 | Packet2cf res = conj_helper<Packet2cf,Packet2cf,false,true>().pmul(a,b); |
---|
204 | Packet4f s = vec_madd(b.v, b.v, p4f_ZERO); |
---|
205 | return Packet2cf(pdiv(res.v, vec_add(s,vec_perm(s, s, p16uc_COMPLEX_REV)))); |
---|
206 | } |
---|
207 | |
---|
208 | template<> EIGEN_STRONG_INLINE Packet2cf pcplxflip<Packet2cf>(const Packet2cf& x) |
---|
209 | { |
---|
210 | return Packet2cf(vec_perm(x.v, x.v, p16uc_COMPLEX_REV)); |
---|
211 | } |
---|
212 | |
---|
213 | } // end namespace internal |
---|
214 | |
---|
215 | } // end namespace Eigen |
---|
216 | |
---|
217 | #endif // EIGEN_COMPLEX_ALTIVEC_H |
---|