1 | // This file is part of Eigen, a lightweight C++ template library
|
---|
2 | // for linear algebra.
|
---|
3 | //
|
---|
4 | // Copyright (C) 2008-2009 Gael Guennebaud <gael.guennebaud@inria.fr>
|
---|
5 | // Copyright (C) 2010 Konstantinos Margaritis <markos@codex.gr>
|
---|
6 | // Heavily based on Gael's SSE version.
|
---|
7 | //
|
---|
8 | // This Source Code Form is subject to the terms of the Mozilla
|
---|
9 | // Public License v. 2.0. If a copy of the MPL was not distributed
|
---|
10 | // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
---|
11 |
|
---|
12 | #ifndef EIGEN_PACKET_MATH_NEON_H
|
---|
13 | #define EIGEN_PACKET_MATH_NEON_H
|
---|
14 |
|
---|
15 | namespace Eigen {
|
---|
16 |
|
---|
17 | namespace internal {
|
---|
18 |
|
---|
19 | #ifndef EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD
|
---|
20 | #define EIGEN_CACHEFRIENDLY_PRODUCT_THRESHOLD 8
|
---|
21 | #endif
|
---|
22 |
|
---|
23 | // FIXME NEON has 16 quad registers, but since the current register allocator
|
---|
24 | // is so bad, it is much better to reduce it to 8
|
---|
25 | #ifndef EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS
|
---|
26 | #define EIGEN_ARCH_DEFAULT_NUMBER_OF_REGISTERS 8
|
---|
27 | #endif
|
---|
28 |
|
---|
29 | typedef float32x4_t Packet4f;
|
---|
30 | typedef int32x4_t Packet4i;
|
---|
31 | typedef uint32x4_t Packet4ui;
|
---|
32 |
|
---|
33 | #define _EIGEN_DECLARE_CONST_Packet4f(NAME,X) \
|
---|
34 | const Packet4f p4f_##NAME = pset1<Packet4f>(X)
|
---|
35 |
|
---|
36 | #define _EIGEN_DECLARE_CONST_Packet4f_FROM_INT(NAME,X) \
|
---|
37 | const Packet4f p4f_##NAME = vreinterpretq_f32_u32(pset1<int>(X))
|
---|
38 |
|
---|
39 | #define _EIGEN_DECLARE_CONST_Packet4i(NAME,X) \
|
---|
40 | const Packet4i p4i_##NAME = pset1<Packet4i>(X)
|
---|
41 |
|
---|
42 | #if defined(__llvm__) && !defined(__clang__)
|
---|
43 | //Special treatment for Apple's llvm-gcc, its NEON packet types are unions
|
---|
44 | #define EIGEN_INIT_NEON_PACKET2(X, Y) {{X, Y}}
|
---|
45 | #define EIGEN_INIT_NEON_PACKET4(X, Y, Z, W) {{X, Y, Z, W}}
|
---|
46 | #else
|
---|
47 | //Default initializer for packets
|
---|
48 | #define EIGEN_INIT_NEON_PACKET2(X, Y) {X, Y}
|
---|
49 | #define EIGEN_INIT_NEON_PACKET4(X, Y, Z, W) {X, Y, Z, W}
|
---|
50 | #endif
|
---|
51 |
|
---|
52 | // arm64 does have the pld instruction. If available, let's trust the __builtin_prefetch built-in function
|
---|
53 | // which available on LLVM and GCC (at least)
|
---|
54 | #if EIGEN_HAS_BUILTIN(__builtin_prefetch) || defined(__GNUC__)
|
---|
55 | #define EIGEN_ARM_PREFETCH(ADDR) __builtin_prefetch(ADDR);
|
---|
56 | #elif defined __pld
|
---|
57 | #define EIGEN_ARM_PREFETCH(ADDR) __pld(ADDR)
|
---|
58 | #elif !defined(__aarch64__)
|
---|
59 | #define EIGEN_ARM_PREFETCH(ADDR) __asm__ __volatile__ ( " pld [%[addr]]\n" :: [addr] "r" (ADDR) : "cc" );
|
---|
60 | #else
|
---|
61 | // by default no explicit prefetching
|
---|
62 | #define EIGEN_ARM_PREFETCH(ADDR)
|
---|
63 | #endif
|
---|
64 |
|
---|
65 | template<> struct packet_traits<float> : default_packet_traits
|
---|
66 | {
|
---|
67 | typedef Packet4f type;
|
---|
68 | enum {
|
---|
69 | Vectorizable = 1,
|
---|
70 | AlignedOnScalar = 1,
|
---|
71 | size = 4,
|
---|
72 |
|
---|
73 | HasDiv = 1,
|
---|
74 | // FIXME check the Has*
|
---|
75 | HasSin = 0,
|
---|
76 | HasCos = 0,
|
---|
77 | HasLog = 0,
|
---|
78 | HasExp = 0,
|
---|
79 | HasSqrt = 0
|
---|
80 | };
|
---|
81 | };
|
---|
82 | template<> struct packet_traits<int> : default_packet_traits
|
---|
83 | {
|
---|
84 | typedef Packet4i type;
|
---|
85 | enum {
|
---|
86 | Vectorizable = 1,
|
---|
87 | AlignedOnScalar = 1,
|
---|
88 | size=4
|
---|
89 | // FIXME check the Has*
|
---|
90 | };
|
---|
91 | };
|
---|
92 |
|
---|
93 | #if EIGEN_GNUC_AT_MOST(4,4) && !defined(__llvm__)
|
---|
94 | // workaround gcc 4.2, 4.3 and 4.4 compilatin issue
|
---|
95 | EIGEN_STRONG_INLINE float32x4_t vld1q_f32(const float* x) { return ::vld1q_f32((const float32_t*)x); }
|
---|
96 | EIGEN_STRONG_INLINE float32x2_t vld1_f32 (const float* x) { return ::vld1_f32 ((const float32_t*)x); }
|
---|
97 | EIGEN_STRONG_INLINE void vst1q_f32(float* to, float32x4_t from) { ::vst1q_f32((float32_t*)to,from); }
|
---|
98 | EIGEN_STRONG_INLINE void vst1_f32 (float* to, float32x2_t from) { ::vst1_f32 ((float32_t*)to,from); }
|
---|
99 | #endif
|
---|
100 |
|
---|
101 | template<> struct unpacket_traits<Packet4f> { typedef float type; enum {size=4}; };
|
---|
102 | template<> struct unpacket_traits<Packet4i> { typedef int type; enum {size=4}; };
|
---|
103 |
|
---|
104 | template<> EIGEN_STRONG_INLINE Packet4f pset1<Packet4f>(const float& from) { return vdupq_n_f32(from); }
|
---|
105 | template<> EIGEN_STRONG_INLINE Packet4i pset1<Packet4i>(const int& from) { return vdupq_n_s32(from); }
|
---|
106 |
|
---|
107 | template<> EIGEN_STRONG_INLINE Packet4f plset<float>(const float& a)
|
---|
108 | {
|
---|
109 | Packet4f countdown = EIGEN_INIT_NEON_PACKET4(0, 1, 2, 3);
|
---|
110 | return vaddq_f32(pset1<Packet4f>(a), countdown);
|
---|
111 | }
|
---|
112 | template<> EIGEN_STRONG_INLINE Packet4i plset<int>(const int& a)
|
---|
113 | {
|
---|
114 | Packet4i countdown = EIGEN_INIT_NEON_PACKET4(0, 1, 2, 3);
|
---|
115 | return vaddq_s32(pset1<Packet4i>(a), countdown);
|
---|
116 | }
|
---|
117 |
|
---|
118 | template<> EIGEN_STRONG_INLINE Packet4f padd<Packet4f>(const Packet4f& a, const Packet4f& b) { return vaddq_f32(a,b); }
|
---|
119 | template<> EIGEN_STRONG_INLINE Packet4i padd<Packet4i>(const Packet4i& a, const Packet4i& b) { return vaddq_s32(a,b); }
|
---|
120 |
|
---|
121 | template<> EIGEN_STRONG_INLINE Packet4f psub<Packet4f>(const Packet4f& a, const Packet4f& b) { return vsubq_f32(a,b); }
|
---|
122 | template<> EIGEN_STRONG_INLINE Packet4i psub<Packet4i>(const Packet4i& a, const Packet4i& b) { return vsubq_s32(a,b); }
|
---|
123 |
|
---|
124 | template<> EIGEN_STRONG_INLINE Packet4f pnegate(const Packet4f& a) { return vnegq_f32(a); }
|
---|
125 | template<> EIGEN_STRONG_INLINE Packet4i pnegate(const Packet4i& a) { return vnegq_s32(a); }
|
---|
126 |
|
---|
127 | template<> EIGEN_STRONG_INLINE Packet4f pconj(const Packet4f& a) { return a; }
|
---|
128 | template<> EIGEN_STRONG_INLINE Packet4i pconj(const Packet4i& a) { return a; }
|
---|
129 |
|
---|
130 | template<> EIGEN_STRONG_INLINE Packet4f pmul<Packet4f>(const Packet4f& a, const Packet4f& b) { return vmulq_f32(a,b); }
|
---|
131 | template<> EIGEN_STRONG_INLINE Packet4i pmul<Packet4i>(const Packet4i& a, const Packet4i& b) { return vmulq_s32(a,b); }
|
---|
132 |
|
---|
133 | template<> EIGEN_STRONG_INLINE Packet4f pdiv<Packet4f>(const Packet4f& a, const Packet4f& b)
|
---|
134 | {
|
---|
135 | Packet4f inv, restep, div;
|
---|
136 |
|
---|
137 | // NEON does not offer a divide instruction, we have to do a reciprocal approximation
|
---|
138 | // However NEON in contrast to other SIMD engines (AltiVec/SSE), offers
|
---|
139 | // a reciprocal estimate AND a reciprocal step -which saves a few instructions
|
---|
140 | // vrecpeq_f32() returns an estimate to 1/b, which we will finetune with
|
---|
141 | // Newton-Raphson and vrecpsq_f32()
|
---|
142 | inv = vrecpeq_f32(b);
|
---|
143 |
|
---|
144 | // This returns a differential, by which we will have to multiply inv to get a better
|
---|
145 | // approximation of 1/b.
|
---|
146 | restep = vrecpsq_f32(b, inv);
|
---|
147 | inv = vmulq_f32(restep, inv);
|
---|
148 |
|
---|
149 | // Finally, multiply a by 1/b and get the wanted result of the division.
|
---|
150 | div = vmulq_f32(a, inv);
|
---|
151 |
|
---|
152 | return div;
|
---|
153 | }
|
---|
154 | template<> EIGEN_STRONG_INLINE Packet4i pdiv<Packet4i>(const Packet4i& /*a*/, const Packet4i& /*b*/)
|
---|
155 | { eigen_assert(false && "packet integer division are not supported by NEON");
|
---|
156 | return pset1<Packet4i>(0);
|
---|
157 | }
|
---|
158 |
|
---|
159 | // for some weird raisons, it has to be overloaded for packet of integers
|
---|
160 | template<> EIGEN_STRONG_INLINE Packet4f pmadd(const Packet4f& a, const Packet4f& b, const Packet4f& c) { return vmlaq_f32(c,a,b); }
|
---|
161 | template<> EIGEN_STRONG_INLINE Packet4i pmadd(const Packet4i& a, const Packet4i& b, const Packet4i& c) { return vmlaq_s32(c,a,b); }
|
---|
162 |
|
---|
163 | template<> EIGEN_STRONG_INLINE Packet4f pmin<Packet4f>(const Packet4f& a, const Packet4f& b) { return vminq_f32(a,b); }
|
---|
164 | template<> EIGEN_STRONG_INLINE Packet4i pmin<Packet4i>(const Packet4i& a, const Packet4i& b) { return vminq_s32(a,b); }
|
---|
165 |
|
---|
166 | template<> EIGEN_STRONG_INLINE Packet4f pmax<Packet4f>(const Packet4f& a, const Packet4f& b) { return vmaxq_f32(a,b); }
|
---|
167 | template<> EIGEN_STRONG_INLINE Packet4i pmax<Packet4i>(const Packet4i& a, const Packet4i& b) { return vmaxq_s32(a,b); }
|
---|
168 |
|
---|
169 | // Logical Operations are not supported for float, so we have to reinterpret casts using NEON intrinsics
|
---|
170 | template<> EIGEN_STRONG_INLINE Packet4f pand<Packet4f>(const Packet4f& a, const Packet4f& b)
|
---|
171 | {
|
---|
172 | return vreinterpretq_f32_u32(vandq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b)));
|
---|
173 | }
|
---|
174 | template<> EIGEN_STRONG_INLINE Packet4i pand<Packet4i>(const Packet4i& a, const Packet4i& b) { return vandq_s32(a,b); }
|
---|
175 |
|
---|
176 | template<> EIGEN_STRONG_INLINE Packet4f por<Packet4f>(const Packet4f& a, const Packet4f& b)
|
---|
177 | {
|
---|
178 | return vreinterpretq_f32_u32(vorrq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b)));
|
---|
179 | }
|
---|
180 | template<> EIGEN_STRONG_INLINE Packet4i por<Packet4i>(const Packet4i& a, const Packet4i& b) { return vorrq_s32(a,b); }
|
---|
181 |
|
---|
182 | template<> EIGEN_STRONG_INLINE Packet4f pxor<Packet4f>(const Packet4f& a, const Packet4f& b)
|
---|
183 | {
|
---|
184 | return vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b)));
|
---|
185 | }
|
---|
186 | template<> EIGEN_STRONG_INLINE Packet4i pxor<Packet4i>(const Packet4i& a, const Packet4i& b) { return veorq_s32(a,b); }
|
---|
187 |
|
---|
188 | template<> EIGEN_STRONG_INLINE Packet4f pandnot<Packet4f>(const Packet4f& a, const Packet4f& b)
|
---|
189 | {
|
---|
190 | return vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b)));
|
---|
191 | }
|
---|
192 | template<> EIGEN_STRONG_INLINE Packet4i pandnot<Packet4i>(const Packet4i& a, const Packet4i& b) { return vbicq_s32(a,b); }
|
---|
193 |
|
---|
194 | template<> EIGEN_STRONG_INLINE Packet4f pload<Packet4f>(const float* from) { EIGEN_DEBUG_ALIGNED_LOAD return vld1q_f32(from); }
|
---|
195 | template<> EIGEN_STRONG_INLINE Packet4i pload<Packet4i>(const int* from) { EIGEN_DEBUG_ALIGNED_LOAD return vld1q_s32(from); }
|
---|
196 |
|
---|
197 | template<> EIGEN_STRONG_INLINE Packet4f ploadu<Packet4f>(const float* from) { EIGEN_DEBUG_UNALIGNED_LOAD return vld1q_f32(from); }
|
---|
198 | template<> EIGEN_STRONG_INLINE Packet4i ploadu<Packet4i>(const int* from) { EIGEN_DEBUG_UNALIGNED_LOAD return vld1q_s32(from); }
|
---|
199 |
|
---|
200 | template<> EIGEN_STRONG_INLINE Packet4f ploaddup<Packet4f>(const float* from)
|
---|
201 | {
|
---|
202 | float32x2_t lo, hi;
|
---|
203 | lo = vld1_dup_f32(from);
|
---|
204 | hi = vld1_dup_f32(from+1);
|
---|
205 | return vcombine_f32(lo, hi);
|
---|
206 | }
|
---|
207 | template<> EIGEN_STRONG_INLINE Packet4i ploaddup<Packet4i>(const int* from)
|
---|
208 | {
|
---|
209 | int32x2_t lo, hi;
|
---|
210 | lo = vld1_dup_s32(from);
|
---|
211 | hi = vld1_dup_s32(from+1);
|
---|
212 | return vcombine_s32(lo, hi);
|
---|
213 | }
|
---|
214 |
|
---|
215 | template<> EIGEN_STRONG_INLINE void pstore<float>(float* to, const Packet4f& from) { EIGEN_DEBUG_ALIGNED_STORE vst1q_f32(to, from); }
|
---|
216 | template<> EIGEN_STRONG_INLINE void pstore<int>(int* to, const Packet4i& from) { EIGEN_DEBUG_ALIGNED_STORE vst1q_s32(to, from); }
|
---|
217 |
|
---|
218 | template<> EIGEN_STRONG_INLINE void pstoreu<float>(float* to, const Packet4f& from) { EIGEN_DEBUG_UNALIGNED_STORE vst1q_f32(to, from); }
|
---|
219 | template<> EIGEN_STRONG_INLINE void pstoreu<int>(int* to, const Packet4i& from) { EIGEN_DEBUG_UNALIGNED_STORE vst1q_s32(to, from); }
|
---|
220 |
|
---|
221 | template<> EIGEN_STRONG_INLINE void prefetch<float>(const float* addr) { EIGEN_ARM_PREFETCH(addr); }
|
---|
222 | template<> EIGEN_STRONG_INLINE void prefetch<int>(const int* addr) { EIGEN_ARM_PREFETCH(addr); }
|
---|
223 |
|
---|
224 | // FIXME only store the 2 first elements ?
|
---|
225 | template<> EIGEN_STRONG_INLINE float pfirst<Packet4f>(const Packet4f& a) { float EIGEN_ALIGN16 x[4]; vst1q_f32(x, a); return x[0]; }
|
---|
226 | template<> EIGEN_STRONG_INLINE int pfirst<Packet4i>(const Packet4i& a) { int EIGEN_ALIGN16 x[4]; vst1q_s32(x, a); return x[0]; }
|
---|
227 |
|
---|
228 | template<> EIGEN_STRONG_INLINE Packet4f preverse(const Packet4f& a) {
|
---|
229 | float32x2_t a_lo, a_hi;
|
---|
230 | Packet4f a_r64;
|
---|
231 |
|
---|
232 | a_r64 = vrev64q_f32(a);
|
---|
233 | a_lo = vget_low_f32(a_r64);
|
---|
234 | a_hi = vget_high_f32(a_r64);
|
---|
235 | return vcombine_f32(a_hi, a_lo);
|
---|
236 | }
|
---|
237 | template<> EIGEN_STRONG_INLINE Packet4i preverse(const Packet4i& a) {
|
---|
238 | int32x2_t a_lo, a_hi;
|
---|
239 | Packet4i a_r64;
|
---|
240 |
|
---|
241 | a_r64 = vrev64q_s32(a);
|
---|
242 | a_lo = vget_low_s32(a_r64);
|
---|
243 | a_hi = vget_high_s32(a_r64);
|
---|
244 | return vcombine_s32(a_hi, a_lo);
|
---|
245 | }
|
---|
246 | template<> EIGEN_STRONG_INLINE Packet4f pabs(const Packet4f& a) { return vabsq_f32(a); }
|
---|
247 | template<> EIGEN_STRONG_INLINE Packet4i pabs(const Packet4i& a) { return vabsq_s32(a); }
|
---|
248 |
|
---|
249 | template<> EIGEN_STRONG_INLINE float predux<Packet4f>(const Packet4f& a)
|
---|
250 | {
|
---|
251 | float32x2_t a_lo, a_hi, sum;
|
---|
252 |
|
---|
253 | a_lo = vget_low_f32(a);
|
---|
254 | a_hi = vget_high_f32(a);
|
---|
255 | sum = vpadd_f32(a_lo, a_hi);
|
---|
256 | sum = vpadd_f32(sum, sum);
|
---|
257 | return vget_lane_f32(sum, 0);
|
---|
258 | }
|
---|
259 |
|
---|
260 | template<> EIGEN_STRONG_INLINE Packet4f preduxp<Packet4f>(const Packet4f* vecs)
|
---|
261 | {
|
---|
262 | float32x4x2_t vtrn1, vtrn2, res1, res2;
|
---|
263 | Packet4f sum1, sum2, sum;
|
---|
264 |
|
---|
265 | // NEON zip performs interleaving of the supplied vectors.
|
---|
266 | // We perform two interleaves in a row to acquire the transposed vector
|
---|
267 | vtrn1 = vzipq_f32(vecs[0], vecs[2]);
|
---|
268 | vtrn2 = vzipq_f32(vecs[1], vecs[3]);
|
---|
269 | res1 = vzipq_f32(vtrn1.val[0], vtrn2.val[0]);
|
---|
270 | res2 = vzipq_f32(vtrn1.val[1], vtrn2.val[1]);
|
---|
271 |
|
---|
272 | // Do the addition of the resulting vectors
|
---|
273 | sum1 = vaddq_f32(res1.val[0], res1.val[1]);
|
---|
274 | sum2 = vaddq_f32(res2.val[0], res2.val[1]);
|
---|
275 | sum = vaddq_f32(sum1, sum2);
|
---|
276 |
|
---|
277 | return sum;
|
---|
278 | }
|
---|
279 |
|
---|
280 | template<> EIGEN_STRONG_INLINE int predux<Packet4i>(const Packet4i& a)
|
---|
281 | {
|
---|
282 | int32x2_t a_lo, a_hi, sum;
|
---|
283 |
|
---|
284 | a_lo = vget_low_s32(a);
|
---|
285 | a_hi = vget_high_s32(a);
|
---|
286 | sum = vpadd_s32(a_lo, a_hi);
|
---|
287 | sum = vpadd_s32(sum, sum);
|
---|
288 | return vget_lane_s32(sum, 0);
|
---|
289 | }
|
---|
290 |
|
---|
291 | template<> EIGEN_STRONG_INLINE Packet4i preduxp<Packet4i>(const Packet4i* vecs)
|
---|
292 | {
|
---|
293 | int32x4x2_t vtrn1, vtrn2, res1, res2;
|
---|
294 | Packet4i sum1, sum2, sum;
|
---|
295 |
|
---|
296 | // NEON zip performs interleaving of the supplied vectors.
|
---|
297 | // We perform two interleaves in a row to acquire the transposed vector
|
---|
298 | vtrn1 = vzipq_s32(vecs[0], vecs[2]);
|
---|
299 | vtrn2 = vzipq_s32(vecs[1], vecs[3]);
|
---|
300 | res1 = vzipq_s32(vtrn1.val[0], vtrn2.val[0]);
|
---|
301 | res2 = vzipq_s32(vtrn1.val[1], vtrn2.val[1]);
|
---|
302 |
|
---|
303 | // Do the addition of the resulting vectors
|
---|
304 | sum1 = vaddq_s32(res1.val[0], res1.val[1]);
|
---|
305 | sum2 = vaddq_s32(res2.val[0], res2.val[1]);
|
---|
306 | sum = vaddq_s32(sum1, sum2);
|
---|
307 |
|
---|
308 | return sum;
|
---|
309 | }
|
---|
310 |
|
---|
311 | // Other reduction functions:
|
---|
312 | // mul
|
---|
313 | template<> EIGEN_STRONG_INLINE float predux_mul<Packet4f>(const Packet4f& a)
|
---|
314 | {
|
---|
315 | float32x2_t a_lo, a_hi, prod;
|
---|
316 |
|
---|
317 | // Get a_lo = |a1|a2| and a_hi = |a3|a4|
|
---|
318 | a_lo = vget_low_f32(a);
|
---|
319 | a_hi = vget_high_f32(a);
|
---|
320 | // Get the product of a_lo * a_hi -> |a1*a3|a2*a4|
|
---|
321 | prod = vmul_f32(a_lo, a_hi);
|
---|
322 | // Multiply prod with its swapped value |a2*a4|a1*a3|
|
---|
323 | prod = vmul_f32(prod, vrev64_f32(prod));
|
---|
324 |
|
---|
325 | return vget_lane_f32(prod, 0);
|
---|
326 | }
|
---|
327 | template<> EIGEN_STRONG_INLINE int predux_mul<Packet4i>(const Packet4i& a)
|
---|
328 | {
|
---|
329 | int32x2_t a_lo, a_hi, prod;
|
---|
330 |
|
---|
331 | // Get a_lo = |a1|a2| and a_hi = |a3|a4|
|
---|
332 | a_lo = vget_low_s32(a);
|
---|
333 | a_hi = vget_high_s32(a);
|
---|
334 | // Get the product of a_lo * a_hi -> |a1*a3|a2*a4|
|
---|
335 | prod = vmul_s32(a_lo, a_hi);
|
---|
336 | // Multiply prod with its swapped value |a2*a4|a1*a3|
|
---|
337 | prod = vmul_s32(prod, vrev64_s32(prod));
|
---|
338 |
|
---|
339 | return vget_lane_s32(prod, 0);
|
---|
340 | }
|
---|
341 |
|
---|
342 | // min
|
---|
343 | template<> EIGEN_STRONG_INLINE float predux_min<Packet4f>(const Packet4f& a)
|
---|
344 | {
|
---|
345 | float32x2_t a_lo, a_hi, min;
|
---|
346 |
|
---|
347 | a_lo = vget_low_f32(a);
|
---|
348 | a_hi = vget_high_f32(a);
|
---|
349 | min = vpmin_f32(a_lo, a_hi);
|
---|
350 | min = vpmin_f32(min, min);
|
---|
351 |
|
---|
352 | return vget_lane_f32(min, 0);
|
---|
353 | }
|
---|
354 |
|
---|
355 | template<> EIGEN_STRONG_INLINE int predux_min<Packet4i>(const Packet4i& a)
|
---|
356 | {
|
---|
357 | int32x2_t a_lo, a_hi, min;
|
---|
358 |
|
---|
359 | a_lo = vget_low_s32(a);
|
---|
360 | a_hi = vget_high_s32(a);
|
---|
361 | min = vpmin_s32(a_lo, a_hi);
|
---|
362 | min = vpmin_s32(min, min);
|
---|
363 |
|
---|
364 | return vget_lane_s32(min, 0);
|
---|
365 | }
|
---|
366 |
|
---|
367 | // max
|
---|
368 | template<> EIGEN_STRONG_INLINE float predux_max<Packet4f>(const Packet4f& a)
|
---|
369 | {
|
---|
370 | float32x2_t a_lo, a_hi, max;
|
---|
371 |
|
---|
372 | a_lo = vget_low_f32(a);
|
---|
373 | a_hi = vget_high_f32(a);
|
---|
374 | max = vpmax_f32(a_lo, a_hi);
|
---|
375 | max = vpmax_f32(max, max);
|
---|
376 |
|
---|
377 | return vget_lane_f32(max, 0);
|
---|
378 | }
|
---|
379 |
|
---|
380 | template<> EIGEN_STRONG_INLINE int predux_max<Packet4i>(const Packet4i& a)
|
---|
381 | {
|
---|
382 | int32x2_t a_lo, a_hi, max;
|
---|
383 |
|
---|
384 | a_lo = vget_low_s32(a);
|
---|
385 | a_hi = vget_high_s32(a);
|
---|
386 | max = vpmax_s32(a_lo, a_hi);
|
---|
387 | max = vpmax_s32(max, max);
|
---|
388 |
|
---|
389 | return vget_lane_s32(max, 0);
|
---|
390 | }
|
---|
391 |
|
---|
392 | // this PALIGN_NEON business is to work around a bug in LLVM Clang 3.0 causing incorrect compilation errors,
|
---|
393 | // see bug 347 and this LLVM bug: http://llvm.org/bugs/show_bug.cgi?id=11074
|
---|
394 | #define PALIGN_NEON(Offset,Type,Command) \
|
---|
395 | template<>\
|
---|
396 | struct palign_impl<Offset,Type>\
|
---|
397 | {\
|
---|
398 | EIGEN_STRONG_INLINE static void run(Type& first, const Type& second)\
|
---|
399 | {\
|
---|
400 | if (Offset!=0)\
|
---|
401 | first = Command(first, second, Offset);\
|
---|
402 | }\
|
---|
403 | };\
|
---|
404 |
|
---|
405 | PALIGN_NEON(0,Packet4f,vextq_f32)
|
---|
406 | PALIGN_NEON(1,Packet4f,vextq_f32)
|
---|
407 | PALIGN_NEON(2,Packet4f,vextq_f32)
|
---|
408 | PALIGN_NEON(3,Packet4f,vextq_f32)
|
---|
409 | PALIGN_NEON(0,Packet4i,vextq_s32)
|
---|
410 | PALIGN_NEON(1,Packet4i,vextq_s32)
|
---|
411 | PALIGN_NEON(2,Packet4i,vextq_s32)
|
---|
412 | PALIGN_NEON(3,Packet4i,vextq_s32)
|
---|
413 |
|
---|
414 | #undef PALIGN_NEON
|
---|
415 |
|
---|
416 | } // end namespace internal
|
---|
417 |
|
---|
418 | } // end namespace Eigen
|
---|
419 |
|
---|
420 | #endif // EIGEN_PACKET_MATH_NEON_H
|
---|