1 // This file is part of Eigen, a lightweight C++ template library 2 // for linear algebra. 3 // 4 // Copyright (C) 2008-2016 Gael Guennebaud <gael.guennebaud (at) 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_UNARY_FUNCTORS_H 11 #define EIGEN_UNARY_FUNCTORS_H 12 13 namespace Eigen { 14 15 namespace internal { 16 17 /** \internal 18 * \brief Template functor to compute the opposite of a scalar 19 * 20 * \sa class CwiseUnaryOp, MatrixBase::operator- 21 */ 22 template<typename Scalar> struct scalar_opposite_op { 23 EIGEN_EMPTY_STRUCT_CTOR(scalar_opposite_op) 24 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return -a; } 25 template<typename Packet> 26 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Packet packetOp(const Packet& a) const 27 { return internal::pnegate(a); } 28 }; 29 template<typename Scalar> 30 struct functor_traits<scalar_opposite_op<Scalar> > 31 { enum { 32 Cost = NumTraits<Scalar>::AddCost, 33 PacketAccess = packet_traits<Scalar>::HasNegate }; 34 }; 35 36 /** \internal 37 * \brief Template functor to compute the absolute value of a scalar 38 * 39 * \sa class CwiseUnaryOp, Cwise::abs 40 */ 41 template<typename Scalar> struct scalar_abs_op { 42 EIGEN_EMPTY_STRUCT_CTOR(scalar_abs_op) 43 typedef typename NumTraits<Scalar>::Real result_type; 44 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return numext::abs(a); } 45 template<typename Packet> 46 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Packet packetOp(const Packet& a) const 47 { return internal::pabs(a); } 48 }; 49 template<typename Scalar> 50 struct functor_traits<scalar_abs_op<Scalar> > 51 { 52 enum { 53 Cost = NumTraits<Scalar>::AddCost, 54 PacketAccess = packet_traits<Scalar>::HasAbs 55 }; 56 }; 57 58 /** \internal 59 * \brief Template functor to compute the score of a scalar, to chose a pivot 60 * 61 * \sa class CwiseUnaryOp 62 */ 63 template<typename Scalar> struct scalar_score_coeff_op : scalar_abs_op<Scalar> 64 { 65 typedef void Score_is_abs; 66 }; 67 template<typename Scalar> 68 struct functor_traits<scalar_score_coeff_op<Scalar> > : functor_traits<scalar_abs_op<Scalar> > {}; 69 70 /* Avoid recomputing abs when we know the score and they are the same. Not a true Eigen functor. */ 71 template<typename Scalar, typename=void> struct abs_knowing_score 72 { 73 EIGEN_EMPTY_STRUCT_CTOR(abs_knowing_score) 74 typedef typename NumTraits<Scalar>::Real result_type; 75 template<typename Score> 76 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a, const Score&) const { return numext::abs(a); } 77 }; 78 template<typename Scalar> struct abs_knowing_score<Scalar, typename scalar_score_coeff_op<Scalar>::Score_is_abs> 79 { 80 EIGEN_EMPTY_STRUCT_CTOR(abs_knowing_score) 81 typedef typename NumTraits<Scalar>::Real result_type; 82 template<typename Scal> 83 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const result_type operator() (const Scal&, const result_type& a) const { return a; } 84 }; 85 86 /** \internal 87 * \brief Template functor to compute the squared absolute value of a scalar 88 * 89 * \sa class CwiseUnaryOp, Cwise::abs2 90 */ 91 template<typename Scalar> struct scalar_abs2_op { 92 EIGEN_EMPTY_STRUCT_CTOR(scalar_abs2_op) 93 typedef typename NumTraits<Scalar>::Real result_type; 94 EIGEN_DEVICE_FUNC 95 EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { return numext::abs2(a); } 96 template<typename Packet> 97 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Packet packetOp(const Packet& a) const 98 { return internal::pmul(a,a); } 99 }; 100 template<typename Scalar> 101 struct functor_traits<scalar_abs2_op<Scalar> > 102 { enum { Cost = NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasAbs2 }; }; 103 104 /** \internal 105 * \brief Template functor to compute the conjugate of a complex value 106 * 107 * \sa class CwiseUnaryOp, MatrixBase::conjugate() 108 */ 109 template<typename Scalar> struct scalar_conjugate_op { 110 EIGEN_EMPTY_STRUCT_CTOR(scalar_conjugate_op) 111 EIGEN_DEVICE_FUNC 112 EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { using numext::conj; return conj(a); } 113 template<typename Packet> 114 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Packet packetOp(const Packet& a) const { return internal::pconj(a); } 115 }; 116 template<typename Scalar> 117 struct functor_traits<scalar_conjugate_op<Scalar> > 118 { 119 enum { 120 Cost = NumTraits<Scalar>::IsComplex ? NumTraits<Scalar>::AddCost : 0, 121 PacketAccess = packet_traits<Scalar>::HasConj 122 }; 123 }; 124 125 /** \internal 126 * \brief Template functor to compute the phase angle of a complex 127 * 128 * \sa class CwiseUnaryOp, Cwise::arg 129 */ 130 template<typename Scalar> struct scalar_arg_op { 131 EIGEN_EMPTY_STRUCT_CTOR(scalar_arg_op) 132 typedef typename NumTraits<Scalar>::Real result_type; 133 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const result_type operator() (const Scalar& a) const { using numext::arg; return arg(a); } 134 template<typename Packet> 135 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Packet packetOp(const Packet& a) const 136 { return internal::parg(a); } 137 }; 138 template<typename Scalar> 139 struct functor_traits<scalar_arg_op<Scalar> > 140 { 141 enum { 142 Cost = NumTraits<Scalar>::IsComplex ? 5 * NumTraits<Scalar>::MulCost : NumTraits<Scalar>::AddCost, 143 PacketAccess = packet_traits<Scalar>::HasArg 144 }; 145 }; 146 /** \internal 147 * \brief Template functor to cast a scalar to another type 148 * 149 * \sa class CwiseUnaryOp, MatrixBase::cast() 150 */ 151 template<typename Scalar, typename NewType> 152 struct scalar_cast_op { 153 EIGEN_EMPTY_STRUCT_CTOR(scalar_cast_op) 154 typedef NewType result_type; 155 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const NewType operator() (const Scalar& a) const { return cast<Scalar, NewType>(a); } 156 }; 157 template<typename Scalar, typename NewType> 158 struct functor_traits<scalar_cast_op<Scalar,NewType> > 159 { enum { Cost = is_same<Scalar, NewType>::value ? 0 : NumTraits<NewType>::AddCost, PacketAccess = false }; }; 160 161 /** \internal 162 * \brief Template functor to extract the real part of a complex 163 * 164 * \sa class CwiseUnaryOp, MatrixBase::real() 165 */ 166 template<typename Scalar> 167 struct scalar_real_op { 168 EIGEN_EMPTY_STRUCT_CTOR(scalar_real_op) 169 typedef typename NumTraits<Scalar>::Real result_type; 170 EIGEN_DEVICE_FUNC 171 EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return numext::real(a); } 172 }; 173 template<typename Scalar> 174 struct functor_traits<scalar_real_op<Scalar> > 175 { enum { Cost = 0, PacketAccess = false }; }; 176 177 /** \internal 178 * \brief Template functor to extract the imaginary part of a complex 179 * 180 * \sa class CwiseUnaryOp, MatrixBase::imag() 181 */ 182 template<typename Scalar> 183 struct scalar_imag_op { 184 EIGEN_EMPTY_STRUCT_CTOR(scalar_imag_op) 185 typedef typename NumTraits<Scalar>::Real result_type; 186 EIGEN_DEVICE_FUNC 187 EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return numext::imag(a); } 188 }; 189 template<typename Scalar> 190 struct functor_traits<scalar_imag_op<Scalar> > 191 { enum { Cost = 0, PacketAccess = false }; }; 192 193 /** \internal 194 * \brief Template functor to extract the real part of a complex as a reference 195 * 196 * \sa class CwiseUnaryOp, MatrixBase::real() 197 */ 198 template<typename Scalar> 199 struct scalar_real_ref_op { 200 EIGEN_EMPTY_STRUCT_CTOR(scalar_real_ref_op) 201 typedef typename NumTraits<Scalar>::Real result_type; 202 EIGEN_DEVICE_FUNC 203 EIGEN_STRONG_INLINE result_type& operator() (const Scalar& a) const { return numext::real_ref(*const_cast<Scalar*>(&a)); } 204 }; 205 template<typename Scalar> 206 struct functor_traits<scalar_real_ref_op<Scalar> > 207 { enum { Cost = 0, PacketAccess = false }; }; 208 209 /** \internal 210 * \brief Template functor to extract the imaginary part of a complex as a reference 211 * 212 * \sa class CwiseUnaryOp, MatrixBase::imag() 213 */ 214 template<typename Scalar> 215 struct scalar_imag_ref_op { 216 EIGEN_EMPTY_STRUCT_CTOR(scalar_imag_ref_op) 217 typedef typename NumTraits<Scalar>::Real result_type; 218 EIGEN_DEVICE_FUNC 219 EIGEN_STRONG_INLINE result_type& operator() (const Scalar& a) const { return numext::imag_ref(*const_cast<Scalar*>(&a)); } 220 }; 221 template<typename Scalar> 222 struct functor_traits<scalar_imag_ref_op<Scalar> > 223 { enum { Cost = 0, PacketAccess = false }; }; 224 225 /** \internal 226 * 227 * \brief Template functor to compute the exponential of a scalar 228 * 229 * \sa class CwiseUnaryOp, Cwise::exp() 230 */ 231 template<typename Scalar> struct scalar_exp_op { 232 EIGEN_EMPTY_STRUCT_CTOR(scalar_exp_op) 233 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::exp(a); } 234 template <typename Packet> 235 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pexp(a); } 236 }; 237 template <typename Scalar> 238 struct functor_traits<scalar_exp_op<Scalar> > { 239 enum { 240 PacketAccess = packet_traits<Scalar>::HasExp, 241 // The following numbers are based on the AVX implementation. 242 #ifdef EIGEN_VECTORIZE_FMA 243 // Haswell can issue 2 add/mul/madd per cycle. 244 Cost = 245 (sizeof(Scalar) == 4 246 // float: 8 pmadd, 4 pmul, 2 padd/psub, 6 other 247 ? (8 * NumTraits<Scalar>::AddCost + 6 * NumTraits<Scalar>::MulCost) 248 // double: 7 pmadd, 5 pmul, 3 padd/psub, 1 div, 13 other 249 : (14 * NumTraits<Scalar>::AddCost + 250 6 * NumTraits<Scalar>::MulCost + 251 scalar_div_cost<Scalar,packet_traits<Scalar>::HasDiv>::value)) 252 #else 253 Cost = 254 (sizeof(Scalar) == 4 255 // float: 7 pmadd, 6 pmul, 4 padd/psub, 10 other 256 ? (21 * NumTraits<Scalar>::AddCost + 13 * NumTraits<Scalar>::MulCost) 257 // double: 7 pmadd, 5 pmul, 3 padd/psub, 1 div, 13 other 258 : (23 * NumTraits<Scalar>::AddCost + 259 12 * NumTraits<Scalar>::MulCost + 260 scalar_div_cost<Scalar,packet_traits<Scalar>::HasDiv>::value)) 261 #endif 262 }; 263 }; 264 265 /** \internal 266 * 267 * \brief Template functor to compute the logarithm of a scalar 268 * 269 * \sa class CwiseUnaryOp, ArrayBase::log() 270 */ 271 template<typename Scalar> struct scalar_log_op { 272 EIGEN_EMPTY_STRUCT_CTOR(scalar_log_op) 273 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::log(a); } 274 template <typename Packet> 275 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog(a); } 276 }; 277 template <typename Scalar> 278 struct functor_traits<scalar_log_op<Scalar> > { 279 enum { 280 PacketAccess = packet_traits<Scalar>::HasLog, 281 Cost = 282 (PacketAccess 283 // The following numbers are based on the AVX implementation. 284 #ifdef EIGEN_VECTORIZE_FMA 285 // 8 pmadd, 6 pmul, 8 padd/psub, 16 other, can issue 2 add/mul/madd per cycle. 286 ? (20 * NumTraits<Scalar>::AddCost + 7 * NumTraits<Scalar>::MulCost) 287 #else 288 // 8 pmadd, 6 pmul, 8 padd/psub, 20 other 289 ? (36 * NumTraits<Scalar>::AddCost + 14 * NumTraits<Scalar>::MulCost) 290 #endif 291 // Measured cost of std::log. 292 : sizeof(Scalar)==4 ? 40 : 85) 293 }; 294 }; 295 296 /** \internal 297 * 298 * \brief Template functor to compute the logarithm of 1 plus a scalar value 299 * 300 * \sa class CwiseUnaryOp, ArrayBase::log1p() 301 */ 302 template<typename Scalar> struct scalar_log1p_op { 303 EIGEN_EMPTY_STRUCT_CTOR(scalar_log1p_op) 304 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::log1p(a); } 305 template <typename Packet> 306 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog1p(a); } 307 }; 308 template <typename Scalar> 309 struct functor_traits<scalar_log1p_op<Scalar> > { 310 enum { 311 PacketAccess = packet_traits<Scalar>::HasLog1p, 312 Cost = functor_traits<scalar_log_op<Scalar> >::Cost // TODO measure cost of log1p 313 }; 314 }; 315 316 /** \internal 317 * 318 * \brief Template functor to compute the base-10 logarithm of a scalar 319 * 320 * \sa class CwiseUnaryOp, Cwise::log10() 321 */ 322 template<typename Scalar> struct scalar_log10_op { 323 EIGEN_EMPTY_STRUCT_CTOR(scalar_log10_op) 324 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { EIGEN_USING_STD_MATH(log10) return log10(a); } 325 template <typename Packet> 326 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::plog10(a); } 327 }; 328 template<typename Scalar> 329 struct functor_traits<scalar_log10_op<Scalar> > 330 { enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasLog10 }; }; 331 332 /** \internal 333 * \brief Template functor to compute the square root of a scalar 334 * \sa class CwiseUnaryOp, Cwise::sqrt() 335 */ 336 template<typename Scalar> struct scalar_sqrt_op { 337 EIGEN_EMPTY_STRUCT_CTOR(scalar_sqrt_op) 338 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::sqrt(a); } 339 template <typename Packet> 340 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::psqrt(a); } 341 }; 342 template <typename Scalar> 343 struct functor_traits<scalar_sqrt_op<Scalar> > { 344 enum { 345 #if EIGEN_FAST_MATH 346 // The following numbers are based on the AVX implementation. 347 Cost = (sizeof(Scalar) == 8 ? 28 348 // 4 pmul, 1 pmadd, 3 other 349 : (3 * NumTraits<Scalar>::AddCost + 350 5 * NumTraits<Scalar>::MulCost)), 351 #else 352 // The following numbers are based on min VSQRT throughput on Haswell. 353 Cost = (sizeof(Scalar) == 8 ? 28 : 14), 354 #endif 355 PacketAccess = packet_traits<Scalar>::HasSqrt 356 }; 357 }; 358 359 /** \internal 360 * \brief Template functor to compute the reciprocal square root of a scalar 361 * \sa class CwiseUnaryOp, Cwise::rsqrt() 362 */ 363 template<typename Scalar> struct scalar_rsqrt_op { 364 EIGEN_EMPTY_STRUCT_CTOR(scalar_rsqrt_op) 365 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return Scalar(1)/numext::sqrt(a); } 366 template <typename Packet> 367 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::prsqrt(a); } 368 }; 369 370 template<typename Scalar> 371 struct functor_traits<scalar_rsqrt_op<Scalar> > 372 { enum { 373 Cost = 5 * NumTraits<Scalar>::MulCost, 374 PacketAccess = packet_traits<Scalar>::HasRsqrt 375 }; 376 }; 377 378 /** \internal 379 * \brief Template functor to compute the cosine of a scalar 380 * \sa class CwiseUnaryOp, ArrayBase::cos() 381 */ 382 template<typename Scalar> struct scalar_cos_op { 383 EIGEN_EMPTY_STRUCT_CTOR(scalar_cos_op) 384 EIGEN_DEVICE_FUNC inline Scalar operator() (const Scalar& a) const { return numext::cos(a); } 385 template <typename Packet> 386 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pcos(a); } 387 }; 388 template<typename Scalar> 389 struct functor_traits<scalar_cos_op<Scalar> > 390 { 391 enum { 392 Cost = 5 * NumTraits<Scalar>::MulCost, 393 PacketAccess = packet_traits<Scalar>::HasCos 394 }; 395 }; 396 397 /** \internal 398 * \brief Template functor to compute the sine of a scalar 399 * \sa class CwiseUnaryOp, ArrayBase::sin() 400 */ 401 template<typename Scalar> struct scalar_sin_op { 402 EIGEN_EMPTY_STRUCT_CTOR(scalar_sin_op) 403 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::sin(a); } 404 template <typename Packet> 405 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::psin(a); } 406 }; 407 template<typename Scalar> 408 struct functor_traits<scalar_sin_op<Scalar> > 409 { 410 enum { 411 Cost = 5 * NumTraits<Scalar>::MulCost, 412 PacketAccess = packet_traits<Scalar>::HasSin 413 }; 414 }; 415 416 417 /** \internal 418 * \brief Template functor to compute the tan of a scalar 419 * \sa class CwiseUnaryOp, ArrayBase::tan() 420 */ 421 template<typename Scalar> struct scalar_tan_op { 422 EIGEN_EMPTY_STRUCT_CTOR(scalar_tan_op) 423 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::tan(a); } 424 template <typename Packet> 425 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::ptan(a); } 426 }; 427 template<typename Scalar> 428 struct functor_traits<scalar_tan_op<Scalar> > 429 { 430 enum { 431 Cost = 5 * NumTraits<Scalar>::MulCost, 432 PacketAccess = packet_traits<Scalar>::HasTan 433 }; 434 }; 435 436 /** \internal 437 * \brief Template functor to compute the arc cosine of a scalar 438 * \sa class CwiseUnaryOp, ArrayBase::acos() 439 */ 440 template<typename Scalar> struct scalar_acos_op { 441 EIGEN_EMPTY_STRUCT_CTOR(scalar_acos_op) 442 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::acos(a); } 443 template <typename Packet> 444 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pacos(a); } 445 }; 446 template<typename Scalar> 447 struct functor_traits<scalar_acos_op<Scalar> > 448 { 449 enum { 450 Cost = 5 * NumTraits<Scalar>::MulCost, 451 PacketAccess = packet_traits<Scalar>::HasACos 452 }; 453 }; 454 455 /** \internal 456 * \brief Template functor to compute the arc sine of a scalar 457 * \sa class CwiseUnaryOp, ArrayBase::asin() 458 */ 459 template<typename Scalar> struct scalar_asin_op { 460 EIGEN_EMPTY_STRUCT_CTOR(scalar_asin_op) 461 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::asin(a); } 462 template <typename Packet> 463 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pasin(a); } 464 }; 465 template<typename Scalar> 466 struct functor_traits<scalar_asin_op<Scalar> > 467 { 468 enum { 469 Cost = 5 * NumTraits<Scalar>::MulCost, 470 PacketAccess = packet_traits<Scalar>::HasASin 471 }; 472 }; 473 474 475 /** \internal 476 * \brief Template functor to compute the atan of a scalar 477 * \sa class CwiseUnaryOp, ArrayBase::atan() 478 */ 479 template<typename Scalar> struct scalar_atan_op { 480 EIGEN_EMPTY_STRUCT_CTOR(scalar_atan_op) 481 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::atan(a); } 482 template <typename Packet> 483 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::patan(a); } 484 }; 485 template<typename Scalar> 486 struct functor_traits<scalar_atan_op<Scalar> > 487 { 488 enum { 489 Cost = 5 * NumTraits<Scalar>::MulCost, 490 PacketAccess = packet_traits<Scalar>::HasATan 491 }; 492 }; 493 494 /** \internal 495 * \brief Template functor to compute the tanh of a scalar 496 * \sa class CwiseUnaryOp, ArrayBase::tanh() 497 */ 498 template <typename Scalar> 499 struct scalar_tanh_op { 500 EIGEN_EMPTY_STRUCT_CTOR(scalar_tanh_op) 501 EIGEN_DEVICE_FUNC inline const Scalar operator()(const Scalar& a) const { return numext::tanh(a); } 502 template <typename Packet> 503 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& x) const { return ptanh(x); } 504 }; 505 506 template <typename Scalar> 507 struct functor_traits<scalar_tanh_op<Scalar> > { 508 enum { 509 PacketAccess = packet_traits<Scalar>::HasTanh, 510 Cost = ( (EIGEN_FAST_MATH && is_same<Scalar,float>::value) 511 // The following numbers are based on the AVX implementation, 512 #ifdef EIGEN_VECTORIZE_FMA 513 // Haswell can issue 2 add/mul/madd per cycle. 514 // 9 pmadd, 2 pmul, 1 div, 2 other 515 ? (2 * NumTraits<Scalar>::AddCost + 516 6 * NumTraits<Scalar>::MulCost + 517 scalar_div_cost<Scalar,packet_traits<Scalar>::HasDiv>::value) 518 #else 519 ? (11 * NumTraits<Scalar>::AddCost + 520 11 * NumTraits<Scalar>::MulCost + 521 scalar_div_cost<Scalar,packet_traits<Scalar>::HasDiv>::value) 522 #endif 523 // This number assumes a naive implementation of tanh 524 : (6 * NumTraits<Scalar>::AddCost + 525 3 * NumTraits<Scalar>::MulCost + 526 2 * scalar_div_cost<Scalar,packet_traits<Scalar>::HasDiv>::value + 527 functor_traits<scalar_exp_op<Scalar> >::Cost)) 528 }; 529 }; 530 531 /** \internal 532 * \brief Template functor to compute the sinh of a scalar 533 * \sa class CwiseUnaryOp, ArrayBase::sinh() 534 */ 535 template<typename Scalar> struct scalar_sinh_op { 536 EIGEN_EMPTY_STRUCT_CTOR(scalar_sinh_op) 537 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::sinh(a); } 538 template <typename Packet> 539 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::psinh(a); } 540 }; 541 template<typename Scalar> 542 struct functor_traits<scalar_sinh_op<Scalar> > 543 { 544 enum { 545 Cost = 5 * NumTraits<Scalar>::MulCost, 546 PacketAccess = packet_traits<Scalar>::HasSinh 547 }; 548 }; 549 550 /** \internal 551 * \brief Template functor to compute the cosh of a scalar 552 * \sa class CwiseUnaryOp, ArrayBase::cosh() 553 */ 554 template<typename Scalar> struct scalar_cosh_op { 555 EIGEN_EMPTY_STRUCT_CTOR(scalar_cosh_op) 556 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const { return numext::cosh(a); } 557 template <typename Packet> 558 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pcosh(a); } 559 }; 560 template<typename Scalar> 561 struct functor_traits<scalar_cosh_op<Scalar> > 562 { 563 enum { 564 Cost = 5 * NumTraits<Scalar>::MulCost, 565 PacketAccess = packet_traits<Scalar>::HasCosh 566 }; 567 }; 568 569 /** \internal 570 * \brief Template functor to compute the inverse of a scalar 571 * \sa class CwiseUnaryOp, Cwise::inverse() 572 */ 573 template<typename Scalar> 574 struct scalar_inverse_op { 575 EIGEN_EMPTY_STRUCT_CTOR(scalar_inverse_op) 576 EIGEN_DEVICE_FUNC inline Scalar operator() (const Scalar& a) const { return Scalar(1)/a; } 577 template<typename Packet> 578 EIGEN_DEVICE_FUNC inline const Packet packetOp(const Packet& a) const 579 { return internal::pdiv(pset1<Packet>(Scalar(1)),a); } 580 }; 581 template<typename Scalar> 582 struct functor_traits<scalar_inverse_op<Scalar> > 583 { enum { Cost = NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasDiv }; }; 584 585 /** \internal 586 * \brief Template functor to compute the square of a scalar 587 * \sa class CwiseUnaryOp, Cwise::square() 588 */ 589 template<typename Scalar> 590 struct scalar_square_op { 591 EIGEN_EMPTY_STRUCT_CTOR(scalar_square_op) 592 EIGEN_DEVICE_FUNC inline Scalar operator() (const Scalar& a) const { return a*a; } 593 template<typename Packet> 594 EIGEN_DEVICE_FUNC inline const Packet packetOp(const Packet& a) const 595 { return internal::pmul(a,a); } 596 }; 597 template<typename Scalar> 598 struct functor_traits<scalar_square_op<Scalar> > 599 { enum { Cost = NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasMul }; }; 600 601 /** \internal 602 * \brief Template functor to compute the cube of a scalar 603 * \sa class CwiseUnaryOp, Cwise::cube() 604 */ 605 template<typename Scalar> 606 struct scalar_cube_op { 607 EIGEN_EMPTY_STRUCT_CTOR(scalar_cube_op) 608 EIGEN_DEVICE_FUNC inline Scalar operator() (const Scalar& a) const { return a*a*a; } 609 template<typename Packet> 610 EIGEN_DEVICE_FUNC inline const Packet packetOp(const Packet& a) const 611 { return internal::pmul(a,pmul(a,a)); } 612 }; 613 template<typename Scalar> 614 struct functor_traits<scalar_cube_op<Scalar> > 615 { enum { Cost = 2*NumTraits<Scalar>::MulCost, PacketAccess = packet_traits<Scalar>::HasMul }; }; 616 617 /** \internal 618 * \brief Template functor to compute the rounded value of a scalar 619 * \sa class CwiseUnaryOp, ArrayBase::round() 620 */ 621 template<typename Scalar> struct scalar_round_op { 622 EIGEN_EMPTY_STRUCT_CTOR(scalar_round_op) 623 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return numext::round(a); } 624 template <typename Packet> 625 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pround(a); } 626 }; 627 template<typename Scalar> 628 struct functor_traits<scalar_round_op<Scalar> > 629 { 630 enum { 631 Cost = NumTraits<Scalar>::MulCost, 632 PacketAccess = packet_traits<Scalar>::HasRound 633 }; 634 }; 635 636 /** \internal 637 * \brief Template functor to compute the floor of a scalar 638 * \sa class CwiseUnaryOp, ArrayBase::floor() 639 */ 640 template<typename Scalar> struct scalar_floor_op { 641 EIGEN_EMPTY_STRUCT_CTOR(scalar_floor_op) 642 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return numext::floor(a); } 643 template <typename Packet> 644 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pfloor(a); } 645 }; 646 template<typename Scalar> 647 struct functor_traits<scalar_floor_op<Scalar> > 648 { 649 enum { 650 Cost = NumTraits<Scalar>::MulCost, 651 PacketAccess = packet_traits<Scalar>::HasFloor 652 }; 653 }; 654 655 /** \internal 656 * \brief Template functor to compute the ceil of a scalar 657 * \sa class CwiseUnaryOp, ArrayBase::ceil() 658 */ 659 template<typename Scalar> struct scalar_ceil_op { 660 EIGEN_EMPTY_STRUCT_CTOR(scalar_ceil_op) 661 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE const Scalar operator() (const Scalar& a) const { return numext::ceil(a); } 662 template <typename Packet> 663 EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::pceil(a); } 664 }; 665 template<typename Scalar> 666 struct functor_traits<scalar_ceil_op<Scalar> > 667 { 668 enum { 669 Cost = NumTraits<Scalar>::MulCost, 670 PacketAccess = packet_traits<Scalar>::HasCeil 671 }; 672 }; 673 674 /** \internal 675 * \brief Template functor to compute whether a scalar is NaN 676 * \sa class CwiseUnaryOp, ArrayBase::isnan() 677 */ 678 template<typename Scalar> struct scalar_isnan_op { 679 EIGEN_EMPTY_STRUCT_CTOR(scalar_isnan_op) 680 typedef bool result_type; 681 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return (numext::isnan)(a); } 682 }; 683 template<typename Scalar> 684 struct functor_traits<scalar_isnan_op<Scalar> > 685 { 686 enum { 687 Cost = NumTraits<Scalar>::MulCost, 688 PacketAccess = false 689 }; 690 }; 691 692 /** \internal 693 * \brief Template functor to check whether a scalar is +/-inf 694 * \sa class CwiseUnaryOp, ArrayBase::isinf() 695 */ 696 template<typename Scalar> struct scalar_isinf_op { 697 EIGEN_EMPTY_STRUCT_CTOR(scalar_isinf_op) 698 typedef bool result_type; 699 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return (numext::isinf)(a); } 700 }; 701 template<typename Scalar> 702 struct functor_traits<scalar_isinf_op<Scalar> > 703 { 704 enum { 705 Cost = NumTraits<Scalar>::MulCost, 706 PacketAccess = false 707 }; 708 }; 709 710 /** \internal 711 * \brief Template functor to check whether a scalar has a finite value 712 * \sa class CwiseUnaryOp, ArrayBase::isfinite() 713 */ 714 template<typename Scalar> struct scalar_isfinite_op { 715 EIGEN_EMPTY_STRUCT_CTOR(scalar_isfinite_op) 716 typedef bool result_type; 717 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return (numext::isfinite)(a); } 718 }; 719 template<typename Scalar> 720 struct functor_traits<scalar_isfinite_op<Scalar> > 721 { 722 enum { 723 Cost = NumTraits<Scalar>::MulCost, 724 PacketAccess = false 725 }; 726 }; 727 728 /** \internal 729 * \brief Template functor to compute the logical not of a boolean 730 * 731 * \sa class CwiseUnaryOp, ArrayBase::operator! 732 */ 733 template<typename Scalar> struct scalar_boolean_not_op { 734 EIGEN_EMPTY_STRUCT_CTOR(scalar_boolean_not_op) 735 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE bool operator() (const bool& a) const { return !a; } 736 }; 737 template<typename Scalar> 738 struct functor_traits<scalar_boolean_not_op<Scalar> > { 739 enum { 740 Cost = NumTraits<bool>::AddCost, 741 PacketAccess = false 742 }; 743 }; 744 745 /** \internal 746 * \brief Template functor to compute the signum of a scalar 747 * \sa class CwiseUnaryOp, Cwise::sign() 748 */ 749 template<typename Scalar,bool iscpx=(NumTraits<Scalar>::IsComplex!=0) > struct scalar_sign_op; 750 template<typename Scalar> 751 struct scalar_sign_op<Scalar,false> { 752 EIGEN_EMPTY_STRUCT_CTOR(scalar_sign_op) 753 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const 754 { 755 return Scalar( (a>Scalar(0)) - (a<Scalar(0)) ); 756 } 757 //TODO 758 //template <typename Packet> 759 //EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::psign(a); } 760 }; 761 template<typename Scalar> 762 struct scalar_sign_op<Scalar,true> { 763 EIGEN_EMPTY_STRUCT_CTOR(scalar_sign_op) 764 EIGEN_DEVICE_FUNC inline const Scalar operator() (const Scalar& a) const 765 { 766 typedef typename NumTraits<Scalar>::Real real_type; 767 real_type aa = numext::abs(a); 768 if (aa==real_type(0)) 769 return Scalar(0); 770 aa = real_type(1)/aa; 771 return Scalar(real(a)*aa, imag(a)*aa ); 772 } 773 //TODO 774 //template <typename Packet> 775 //EIGEN_DEVICE_FUNC inline Packet packetOp(const Packet& a) const { return internal::psign(a); } 776 }; 777 template<typename Scalar> 778 struct functor_traits<scalar_sign_op<Scalar> > 779 { enum { 780 Cost = 781 NumTraits<Scalar>::IsComplex 782 ? ( 8*NumTraits<Scalar>::MulCost ) // roughly 783 : ( 3*NumTraits<Scalar>::AddCost), 784 PacketAccess = packet_traits<Scalar>::HasSign 785 }; 786 }; 787 788 } // end namespace internal 789 790 } // end namespace Eigen 791 792 #endif // EIGEN_FUNCTORS_H 793
