Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 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 | #ifndef __pld |
| 53 | #define __pld(x) asm volatile ( " pld [%[addr]]\n" :: [addr] "r" (x) : "cc" ); |
| 54 | #endif |
| 55 | |
| 56 | template<> struct packet_traits<float> : default_packet_traits |
| 57 | { |
| 58 | typedef Packet4f type; |
| 59 | enum { |
| 60 | Vectorizable = 1, |
| 61 | AlignedOnScalar = 1, |
| 62 | size = 4, |
| 63 | |
| 64 | HasDiv = 1, |
| 65 | // FIXME check the Has* |
| 66 | HasSin = 0, |
| 67 | HasCos = 0, |
| 68 | HasLog = 0, |
| 69 | HasExp = 0, |
| 70 | HasSqrt = 0 |
| 71 | }; |
| 72 | }; |
| 73 | template<> struct packet_traits<int> : default_packet_traits |
| 74 | { |
| 75 | typedef Packet4i type; |
| 76 | enum { |
| 77 | Vectorizable = 1, |
| 78 | AlignedOnScalar = 1, |
| 79 | size=4 |
| 80 | // FIXME check the Has* |
| 81 | }; |
| 82 | }; |
| 83 | |
| 84 | #if EIGEN_GNUC_AT_MOST(4,4) && !defined(__llvm__) |
| 85 | // workaround gcc 4.2, 4.3 and 4.4 compilatin issue |
| 86 | EIGEN_STRONG_INLINE float32x4_t vld1q_f32(const float* x) { return ::vld1q_f32((const float32_t*)x); } |
| 87 | EIGEN_STRONG_INLINE float32x2_t vld1_f32 (const float* x) { return ::vld1_f32 ((const float32_t*)x); } |
| 88 | EIGEN_STRONG_INLINE void vst1q_f32(float* to, float32x4_t from) { ::vst1q_f32((float32_t*)to,from); } |
| 89 | EIGEN_STRONG_INLINE void vst1_f32 (float* to, float32x2_t from) { ::vst1_f32 ((float32_t*)to,from); } |
| 90 | #endif |
| 91 | |
| 92 | template<> struct unpacket_traits<Packet4f> { typedef float type; enum {size=4}; }; |
| 93 | template<> struct unpacket_traits<Packet4i> { typedef int type; enum {size=4}; }; |
| 94 | |
| 95 | template<> EIGEN_STRONG_INLINE Packet4f pset1<Packet4f>(const float& from) { return vdupq_n_f32(from); } |
| 96 | template<> EIGEN_STRONG_INLINE Packet4i pset1<Packet4i>(const int& from) { return vdupq_n_s32(from); } |
| 97 | |
| 98 | template<> EIGEN_STRONG_INLINE Packet4f plset<float>(const float& a) |
| 99 | { |
| 100 | Packet4f countdown = EIGEN_INIT_NEON_PACKET4(0, 1, 2, 3); |
| 101 | return vaddq_f32(pset1<Packet4f>(a), countdown); |
| 102 | } |
| 103 | template<> EIGEN_STRONG_INLINE Packet4i plset<int>(const int& a) |
| 104 | { |
| 105 | Packet4i countdown = EIGEN_INIT_NEON_PACKET4(0, 1, 2, 3); |
| 106 | return vaddq_s32(pset1<Packet4i>(a), countdown); |
| 107 | } |
| 108 | |
| 109 | template<> EIGEN_STRONG_INLINE Packet4f padd<Packet4f>(const Packet4f& a, const Packet4f& b) { return vaddq_f32(a,b); } |
| 110 | template<> EIGEN_STRONG_INLINE Packet4i padd<Packet4i>(const Packet4i& a, const Packet4i& b) { return vaddq_s32(a,b); } |
| 111 | |
| 112 | template<> EIGEN_STRONG_INLINE Packet4f psub<Packet4f>(const Packet4f& a, const Packet4f& b) { return vsubq_f32(a,b); } |
| 113 | template<> EIGEN_STRONG_INLINE Packet4i psub<Packet4i>(const Packet4i& a, const Packet4i& b) { return vsubq_s32(a,b); } |
| 114 | |
| 115 | template<> EIGEN_STRONG_INLINE Packet4f pnegate(const Packet4f& a) { return vnegq_f32(a); } |
| 116 | template<> EIGEN_STRONG_INLINE Packet4i pnegate(const Packet4i& a) { return vnegq_s32(a); } |
| 117 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 118 | template<> EIGEN_STRONG_INLINE Packet4f pconj(const Packet4f& a) { return a; } |
| 119 | template<> EIGEN_STRONG_INLINE Packet4i pconj(const Packet4i& a) { return a; } |
| 120 | |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 121 | template<> EIGEN_STRONG_INLINE Packet4f pmul<Packet4f>(const Packet4f& a, const Packet4f& b) { return vmulq_f32(a,b); } |
| 122 | template<> EIGEN_STRONG_INLINE Packet4i pmul<Packet4i>(const Packet4i& a, const Packet4i& b) { return vmulq_s32(a,b); } |
| 123 | |
| 124 | template<> EIGEN_STRONG_INLINE Packet4f pdiv<Packet4f>(const Packet4f& a, const Packet4f& b) |
| 125 | { |
| 126 | Packet4f inv, restep, div; |
| 127 | |
| 128 | // NEON does not offer a divide instruction, we have to do a reciprocal approximation |
| 129 | // However NEON in contrast to other SIMD engines (AltiVec/SSE), offers |
| 130 | // a reciprocal estimate AND a reciprocal step -which saves a few instructions |
| 131 | // vrecpeq_f32() returns an estimate to 1/b, which we will finetune with |
| 132 | // Newton-Raphson and vrecpsq_f32() |
| 133 | inv = vrecpeq_f32(b); |
| 134 | |
| 135 | // This returns a differential, by which we will have to multiply inv to get a better |
| 136 | // approximation of 1/b. |
| 137 | restep = vrecpsq_f32(b, inv); |
| 138 | inv = vmulq_f32(restep, inv); |
| 139 | |
| 140 | // Finally, multiply a by 1/b and get the wanted result of the division. |
| 141 | div = vmulq_f32(a, inv); |
| 142 | |
| 143 | return div; |
| 144 | } |
| 145 | template<> EIGEN_STRONG_INLINE Packet4i pdiv<Packet4i>(const Packet4i& /*a*/, const Packet4i& /*b*/) |
| 146 | { eigen_assert(false && "packet integer division are not supported by NEON"); |
| 147 | return pset1<Packet4i>(0); |
| 148 | } |
| 149 | |
| 150 | // for some weird raisons, it has to be overloaded for packet of integers |
| 151 | template<> EIGEN_STRONG_INLINE Packet4f pmadd(const Packet4f& a, const Packet4f& b, const Packet4f& c) { return vmlaq_f32(c,a,b); } |
| 152 | template<> EIGEN_STRONG_INLINE Packet4i pmadd(const Packet4i& a, const Packet4i& b, const Packet4i& c) { return vmlaq_s32(c,a,b); } |
| 153 | |
| 154 | template<> EIGEN_STRONG_INLINE Packet4f pmin<Packet4f>(const Packet4f& a, const Packet4f& b) { return vminq_f32(a,b); } |
| 155 | template<> EIGEN_STRONG_INLINE Packet4i pmin<Packet4i>(const Packet4i& a, const Packet4i& b) { return vminq_s32(a,b); } |
| 156 | |
| 157 | template<> EIGEN_STRONG_INLINE Packet4f pmax<Packet4f>(const Packet4f& a, const Packet4f& b) { return vmaxq_f32(a,b); } |
| 158 | template<> EIGEN_STRONG_INLINE Packet4i pmax<Packet4i>(const Packet4i& a, const Packet4i& b) { return vmaxq_s32(a,b); } |
| 159 | |
| 160 | // Logical Operations are not supported for float, so we have to reinterpret casts using NEON intrinsics |
| 161 | template<> EIGEN_STRONG_INLINE Packet4f pand<Packet4f>(const Packet4f& a, const Packet4f& b) |
| 162 | { |
| 163 | return vreinterpretq_f32_u32(vandq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b))); |
| 164 | } |
| 165 | template<> EIGEN_STRONG_INLINE Packet4i pand<Packet4i>(const Packet4i& a, const Packet4i& b) { return vandq_s32(a,b); } |
| 166 | |
| 167 | template<> EIGEN_STRONG_INLINE Packet4f por<Packet4f>(const Packet4f& a, const Packet4f& b) |
| 168 | { |
| 169 | return vreinterpretq_f32_u32(vorrq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b))); |
| 170 | } |
| 171 | template<> EIGEN_STRONG_INLINE Packet4i por<Packet4i>(const Packet4i& a, const Packet4i& b) { return vorrq_s32(a,b); } |
| 172 | |
| 173 | template<> EIGEN_STRONG_INLINE Packet4f pxor<Packet4f>(const Packet4f& a, const Packet4f& b) |
| 174 | { |
| 175 | return vreinterpretq_f32_u32(veorq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b))); |
| 176 | } |
| 177 | template<> EIGEN_STRONG_INLINE Packet4i pxor<Packet4i>(const Packet4i& a, const Packet4i& b) { return veorq_s32(a,b); } |
| 178 | |
| 179 | template<> EIGEN_STRONG_INLINE Packet4f pandnot<Packet4f>(const Packet4f& a, const Packet4f& b) |
| 180 | { |
| 181 | return vreinterpretq_f32_u32(vbicq_u32(vreinterpretq_u32_f32(a),vreinterpretq_u32_f32(b))); |
| 182 | } |
| 183 | template<> EIGEN_STRONG_INLINE Packet4i pandnot<Packet4i>(const Packet4i& a, const Packet4i& b) { return vbicq_s32(a,b); } |
| 184 | |
| 185 | template<> EIGEN_STRONG_INLINE Packet4f pload<Packet4f>(const float* from) { EIGEN_DEBUG_ALIGNED_LOAD return vld1q_f32(from); } |
| 186 | template<> EIGEN_STRONG_INLINE Packet4i pload<Packet4i>(const int* from) { EIGEN_DEBUG_ALIGNED_LOAD return vld1q_s32(from); } |
| 187 | |
| 188 | template<> EIGEN_STRONG_INLINE Packet4f ploadu<Packet4f>(const float* from) { EIGEN_DEBUG_UNALIGNED_LOAD return vld1q_f32(from); } |
| 189 | template<> EIGEN_STRONG_INLINE Packet4i ploadu<Packet4i>(const int* from) { EIGEN_DEBUG_UNALIGNED_LOAD return vld1q_s32(from); } |
| 190 | |
| 191 | template<> EIGEN_STRONG_INLINE Packet4f ploaddup<Packet4f>(const float* from) |
| 192 | { |
| 193 | float32x2_t lo, hi; |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 194 | lo = vld1_dup_f32(from); |
| 195 | hi = vld1_dup_f32(from+1); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 196 | return vcombine_f32(lo, hi); |
| 197 | } |
| 198 | template<> EIGEN_STRONG_INLINE Packet4i ploaddup<Packet4i>(const int* from) |
| 199 | { |
| 200 | int32x2_t lo, hi; |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 201 | lo = vld1_dup_s32(from); |
| 202 | hi = vld1_dup_s32(from+1); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 203 | return vcombine_s32(lo, hi); |
| 204 | } |
| 205 | |
| 206 | template<> EIGEN_STRONG_INLINE void pstore<float>(float* to, const Packet4f& from) { EIGEN_DEBUG_ALIGNED_STORE vst1q_f32(to, from); } |
| 207 | template<> EIGEN_STRONG_INLINE void pstore<int>(int* to, const Packet4i& from) { EIGEN_DEBUG_ALIGNED_STORE vst1q_s32(to, from); } |
| 208 | |
| 209 | template<> EIGEN_STRONG_INLINE void pstoreu<float>(float* to, const Packet4f& from) { EIGEN_DEBUG_UNALIGNED_STORE vst1q_f32(to, from); } |
| 210 | template<> EIGEN_STRONG_INLINE void pstoreu<int>(int* to, const Packet4i& from) { EIGEN_DEBUG_UNALIGNED_STORE vst1q_s32(to, from); } |
| 211 | |
| 212 | template<> EIGEN_STRONG_INLINE void prefetch<float>(const float* addr) { __pld(addr); } |
| 213 | template<> EIGEN_STRONG_INLINE void prefetch<int>(const int* addr) { __pld(addr); } |
| 214 | |
| 215 | // FIXME only store the 2 first elements ? |
| 216 | template<> EIGEN_STRONG_INLINE float pfirst<Packet4f>(const Packet4f& a) { float EIGEN_ALIGN16 x[4]; vst1q_f32(x, a); return x[0]; } |
| 217 | template<> EIGEN_STRONG_INLINE int pfirst<Packet4i>(const Packet4i& a) { int EIGEN_ALIGN16 x[4]; vst1q_s32(x, a); return x[0]; } |
| 218 | |
| 219 | template<> EIGEN_STRONG_INLINE Packet4f preverse(const Packet4f& a) { |
| 220 | float32x2_t a_lo, a_hi; |
| 221 | Packet4f a_r64; |
| 222 | |
| 223 | a_r64 = vrev64q_f32(a); |
| 224 | a_lo = vget_low_f32(a_r64); |
| 225 | a_hi = vget_high_f32(a_r64); |
| 226 | return vcombine_f32(a_hi, a_lo); |
| 227 | } |
| 228 | template<> EIGEN_STRONG_INLINE Packet4i preverse(const Packet4i& a) { |
| 229 | int32x2_t a_lo, a_hi; |
| 230 | Packet4i a_r64; |
| 231 | |
| 232 | a_r64 = vrev64q_s32(a); |
| 233 | a_lo = vget_low_s32(a_r64); |
| 234 | a_hi = vget_high_s32(a_r64); |
| 235 | return vcombine_s32(a_hi, a_lo); |
| 236 | } |
| 237 | template<> EIGEN_STRONG_INLINE Packet4f pabs(const Packet4f& a) { return vabsq_f32(a); } |
| 238 | template<> EIGEN_STRONG_INLINE Packet4i pabs(const Packet4i& a) { return vabsq_s32(a); } |
| 239 | |
| 240 | template<> EIGEN_STRONG_INLINE float predux<Packet4f>(const Packet4f& a) |
| 241 | { |
| 242 | float32x2_t a_lo, a_hi, sum; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 243 | |
| 244 | a_lo = vget_low_f32(a); |
| 245 | a_hi = vget_high_f32(a); |
| 246 | sum = vpadd_f32(a_lo, a_hi); |
| 247 | sum = vpadd_f32(sum, sum); |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 248 | return vget_lane_f32(sum, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 249 | } |
| 250 | |
| 251 | template<> EIGEN_STRONG_INLINE Packet4f preduxp<Packet4f>(const Packet4f* vecs) |
| 252 | { |
| 253 | float32x4x2_t vtrn1, vtrn2, res1, res2; |
| 254 | Packet4f sum1, sum2, sum; |
| 255 | |
| 256 | // NEON zip performs interleaving of the supplied vectors. |
| 257 | // We perform two interleaves in a row to acquire the transposed vector |
| 258 | vtrn1 = vzipq_f32(vecs[0], vecs[2]); |
| 259 | vtrn2 = vzipq_f32(vecs[1], vecs[3]); |
| 260 | res1 = vzipq_f32(vtrn1.val[0], vtrn2.val[0]); |
| 261 | res2 = vzipq_f32(vtrn1.val[1], vtrn2.val[1]); |
| 262 | |
| 263 | // Do the addition of the resulting vectors |
| 264 | sum1 = vaddq_f32(res1.val[0], res1.val[1]); |
| 265 | sum2 = vaddq_f32(res2.val[0], res2.val[1]); |
| 266 | sum = vaddq_f32(sum1, sum2); |
| 267 | |
| 268 | return sum; |
| 269 | } |
| 270 | |
| 271 | template<> EIGEN_STRONG_INLINE int predux<Packet4i>(const Packet4i& a) |
| 272 | { |
| 273 | int32x2_t a_lo, a_hi, sum; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 274 | |
| 275 | a_lo = vget_low_s32(a); |
| 276 | a_hi = vget_high_s32(a); |
| 277 | sum = vpadd_s32(a_lo, a_hi); |
| 278 | sum = vpadd_s32(sum, sum); |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 279 | return vget_lane_s32(sum, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 280 | } |
| 281 | |
| 282 | template<> EIGEN_STRONG_INLINE Packet4i preduxp<Packet4i>(const Packet4i* vecs) |
| 283 | { |
| 284 | int32x4x2_t vtrn1, vtrn2, res1, res2; |
| 285 | Packet4i sum1, sum2, sum; |
| 286 | |
| 287 | // NEON zip performs interleaving of the supplied vectors. |
| 288 | // We perform two interleaves in a row to acquire the transposed vector |
| 289 | vtrn1 = vzipq_s32(vecs[0], vecs[2]); |
| 290 | vtrn2 = vzipq_s32(vecs[1], vecs[3]); |
| 291 | res1 = vzipq_s32(vtrn1.val[0], vtrn2.val[0]); |
| 292 | res2 = vzipq_s32(vtrn1.val[1], vtrn2.val[1]); |
| 293 | |
| 294 | // Do the addition of the resulting vectors |
| 295 | sum1 = vaddq_s32(res1.val[0], res1.val[1]); |
| 296 | sum2 = vaddq_s32(res2.val[0], res2.val[1]); |
| 297 | sum = vaddq_s32(sum1, sum2); |
| 298 | |
| 299 | return sum; |
| 300 | } |
| 301 | |
| 302 | // Other reduction functions: |
| 303 | // mul |
| 304 | template<> EIGEN_STRONG_INLINE float predux_mul<Packet4f>(const Packet4f& a) |
| 305 | { |
| 306 | float32x2_t a_lo, a_hi, prod; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 307 | |
| 308 | // Get a_lo = |a1|a2| and a_hi = |a3|a4| |
| 309 | a_lo = vget_low_f32(a); |
| 310 | a_hi = vget_high_f32(a); |
| 311 | // Get the product of a_lo * a_hi -> |a1*a3|a2*a4| |
| 312 | prod = vmul_f32(a_lo, a_hi); |
| 313 | // Multiply prod with its swapped value |a2*a4|a1*a3| |
| 314 | prod = vmul_f32(prod, vrev64_f32(prod)); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 315 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 316 | return vget_lane_f32(prod, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 317 | } |
| 318 | template<> EIGEN_STRONG_INLINE int predux_mul<Packet4i>(const Packet4i& a) |
| 319 | { |
| 320 | int32x2_t a_lo, a_hi, prod; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 321 | |
| 322 | // Get a_lo = |a1|a2| and a_hi = |a3|a4| |
| 323 | a_lo = vget_low_s32(a); |
| 324 | a_hi = vget_high_s32(a); |
| 325 | // Get the product of a_lo * a_hi -> |a1*a3|a2*a4| |
| 326 | prod = vmul_s32(a_lo, a_hi); |
| 327 | // Multiply prod with its swapped value |a2*a4|a1*a3| |
| 328 | prod = vmul_s32(prod, vrev64_s32(prod)); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 329 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 330 | return vget_lane_s32(prod, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 331 | } |
| 332 | |
| 333 | // min |
| 334 | template<> EIGEN_STRONG_INLINE float predux_min<Packet4f>(const Packet4f& a) |
| 335 | { |
| 336 | float32x2_t a_lo, a_hi, min; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 337 | |
| 338 | a_lo = vget_low_f32(a); |
| 339 | a_hi = vget_high_f32(a); |
| 340 | min = vpmin_f32(a_lo, a_hi); |
| 341 | min = vpmin_f32(min, min); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 342 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 343 | return vget_lane_f32(min, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 344 | } |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 345 | |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 346 | template<> EIGEN_STRONG_INLINE int predux_min<Packet4i>(const Packet4i& a) |
| 347 | { |
| 348 | int32x2_t a_lo, a_hi, min; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 349 | |
| 350 | a_lo = vget_low_s32(a); |
| 351 | a_hi = vget_high_s32(a); |
| 352 | min = vpmin_s32(a_lo, a_hi); |
| 353 | min = vpmin_s32(min, min); |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 354 | |
| 355 | return vget_lane_s32(min, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 356 | } |
| 357 | |
| 358 | // max |
| 359 | template<> EIGEN_STRONG_INLINE float predux_max<Packet4f>(const Packet4f& a) |
| 360 | { |
| 361 | float32x2_t a_lo, a_hi, max; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 362 | |
| 363 | a_lo = vget_low_f32(a); |
| 364 | a_hi = vget_high_f32(a); |
| 365 | max = vpmax_f32(a_lo, a_hi); |
| 366 | max = vpmax_f32(max, max); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 367 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 368 | return vget_lane_f32(max, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 369 | } |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 370 | |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 371 | template<> EIGEN_STRONG_INLINE int predux_max<Packet4i>(const Packet4i& a) |
| 372 | { |
| 373 | int32x2_t a_lo, a_hi, max; |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 374 | |
| 375 | a_lo = vget_low_s32(a); |
| 376 | a_hi = vget_high_s32(a); |
| 377 | max = vpmax_s32(a_lo, a_hi); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 378 | |
Carlos Hernandez | 7faaa9f | 2014-08-05 17:53:32 -0700 | [diff] [blame] | 379 | return vget_lane_s32(max, 0); |
Narayan Kamath | c981c48 | 2012-11-02 10:59:05 +0000 | [diff] [blame] | 380 | } |
| 381 | |
| 382 | // this PALIGN_NEON business is to work around a bug in LLVM Clang 3.0 causing incorrect compilation errors, |
| 383 | // see bug 347 and this LLVM bug: http://llvm.org/bugs/show_bug.cgi?id=11074 |
| 384 | #define PALIGN_NEON(Offset,Type,Command) \ |
| 385 | template<>\ |
| 386 | struct palign_impl<Offset,Type>\ |
| 387 | {\ |
| 388 | EIGEN_STRONG_INLINE static void run(Type& first, const Type& second)\ |
| 389 | {\ |
| 390 | if (Offset!=0)\ |
| 391 | first = Command(first, second, Offset);\ |
| 392 | }\ |
| 393 | };\ |
| 394 | |
| 395 | PALIGN_NEON(0,Packet4f,vextq_f32) |
| 396 | PALIGN_NEON(1,Packet4f,vextq_f32) |
| 397 | PALIGN_NEON(2,Packet4f,vextq_f32) |
| 398 | PALIGN_NEON(3,Packet4f,vextq_f32) |
| 399 | PALIGN_NEON(0,Packet4i,vextq_s32) |
| 400 | PALIGN_NEON(1,Packet4i,vextq_s32) |
| 401 | PALIGN_NEON(2,Packet4i,vextq_s32) |
| 402 | PALIGN_NEON(3,Packet4i,vextq_s32) |
| 403 | |
| 404 | #undef PALIGN_NEON |
| 405 | |
| 406 | } // end namespace internal |
| 407 | |
| 408 | } // end namespace Eigen |
| 409 | |
| 410 | #endif // EIGEN_PACKET_MATH_NEON_H |