Vc/avx/limits.h

0001 /*  This file is part of the Vc library. {{{
0002 Copyright © 2009-2015 Matthias Kretz <kretz@kde.org>
0003
0004 Redistribution and use in source and binary forms, with or without
0005 modification, are permitted provided that the following conditions are met:
0006     * Redistributions of source code must retain the above copyright
0007       notice, this list of conditions and the following disclaimer.
0008     * Redistributions in binary form must reproduce the above copyright
0009       notice, this list of conditions and the following disclaimer in the
0010       documentation and/or other materials provided with the distribution.
0011     * Neither the names of contributing organizations nor the
0012       names of its contributors may be used to endorse or promote products
0013       derived from this software without specific prior written permission.
0014
0015 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
0016 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
0017 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
0018 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
0019 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
0020 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
0021 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
0022 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
0023 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
0024 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
0025
0026 }}}*/
0027
0028 #ifndef VC_AVX_LIMITS_H_
0029 #define VC_AVX_LIMITS_H_
0030
0031 #include "intrinsics.h"
0032 #include "types.h"
0033 #include "macros.h"
0034
0035 namespace std
0036 {
0037 #define Vc_NUM_LIM(T, _max, _min)                                                        \
0038     template <> struct numeric_limits<Vc::AVX2::Vector<T>> : public numeric_limits<T> {  \
0039         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> max() Vc_NOEXCEPT               \
0040         {                                                                                \
0041             return _max;                                                                 \
0042         }                                                                                \
0043         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> min() Vc_NOEXCEPT               \
0044         {                                                                                \
0045             return _min;                                                                 \
0046         }                                                                                \
0047         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> lowest() Vc_NOEXCEPT            \
0048         {                                                                                \
0049             return min();                                                                \
0050         }                                                                                \
0051         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> epsilon() Vc_NOEXCEPT           \
0052         {                                                                                \
0053             return Vc::AVX2::Vector<T>::Zero();                                          \
0054         }                                                                                \
0055         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> round_error() Vc_NOEXCEPT       \
0056         {                                                                                \
0057             return Vc::AVX2::Vector<T>::Zero();                                          \
0058         }                                                                                \
0059         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> infinity() Vc_NOEXCEPT          \
0060         {                                                                                \
0061             return Vc::AVX2::Vector<T>::Zero();                                          \
0062         }                                                                                \
0063         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> quiet_NaN() Vc_NOEXCEPT         \
0064         {                                                                                \
0065             return Vc::AVX2::Vector<T>::Zero();                                          \
0066         }                                                                                \
0067         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> signaling_NaN() Vc_NOEXCEPT     \
0068         {                                                                                \
0069             return Vc::AVX2::Vector<T>::Zero();                                          \
0070         }                                                                                \
0071         static Vc_INTRINSIC Vc_CONST Vc::AVX2::Vector<T> denorm_min() Vc_NOEXCEPT        \
0072         {                                                                                \
0073             return Vc::AVX2::Vector<T>::Zero();                                          \
0074         }                                                                                \
0075     }
0076
0077 #ifdef Vc_IMPL_AVX2
0078 Vc_NUM_LIM(unsigned short, Vc::Detail::allone<__m256i>(), Vc::Detail::zero<__m256i>());
0079 Vc_NUM_LIM(         short, _mm256_srli_epi16(Vc::Detail::allone<__m256i>(), 1), Vc::AVX::setmin_epi16());
0080 Vc_NUM_LIM(  unsigned int, Vc::Detail::allone<__m256i>(), Vc::Detail::zero<__m256i>());
0081 Vc_NUM_LIM(           int, _mm256_srli_epi32(Vc::Detail::allone<__m256i>(), 1), Vc::AVX::setmin_epi32());
0082 #endif
0083 #undef Vc_NUM_LIM
0084
0085 } // namespace std
0086
0087 #endif // VC_AVX_LIMITS_H_