Vc 1.4.5
SIMD Vector Classes for C++
 
Loading...
Searching...
No Matches
maskbool.h
1/* This file is part of the Vc library. {{{
2Copyright © 2013-2015 Matthias Kretz <kretz@kde.org>
3
4Redistribution and use in source and binary forms, with or without
5modification, are permitted provided that the following conditions are met:
6 * Redistributions of source code must retain the above copyright
7 notice, this list of conditions and the following disclaimer.
8 * Redistributions in binary form must reproduce the above copyright
9 notice, this list of conditions and the following disclaimer in the
10 documentation and/or other materials provided with the distribution.
11 * Neither the names of contributing organizations nor the
12 names of its contributors may be used to endorse or promote products
13 derived from this software without specific prior written permission.
14
15THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
16ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE FOR ANY
19DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
20(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
21LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
22ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
24SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
26}}}*/
27
28#ifndef VC_COMMON_MASKENTRY_H_
29#define VC_COMMON_MASKENTRY_H_
30
31#include "macros.h"
32
33namespace Vc_VERSIONED_NAMESPACE
34{
35namespace Common
36{
37
38namespace
39{
40 template<size_t Bytes> struct MaskBoolStorage;
41 // the following for typedefs must use std::intN_t and NOT! Vc::intN_t. The latter
42 // segfaults ICC 15.0.3.
43 template<> struct MaskBoolStorage<1> { typedef std::int8_t type; };
44 template<> struct MaskBoolStorage<2> { typedef std::int16_t type; };
45 template<> struct MaskBoolStorage<4> { typedef std::int32_t type; };
46 template<> struct MaskBoolStorage<8> { typedef std::int64_t type; };
47} // anonymous namespace
48
49template<size_t Bytes> class MaskBool
50{
51 typedef typename MaskBoolStorage<Bytes>::type storage_type Vc_MAY_ALIAS;
52 storage_type data;
53public:
54 constexpr MaskBool(bool x) noexcept : data(x ? -1 : 0) {}
55 Vc_ALWAYS_INLINE MaskBool &operator=(bool x) noexcept { data = x ? -1 : 0; return *this; }
56 template <typename T, typename = enable_if<(!std::is_same<T, bool>::value &&
57 std::is_fundamental<T>::value)>>
58 Vc_ALWAYS_INLINE MaskBool &operator=(T x) noexcept
59 {
60 data = reinterpret_cast<const storage_type &>(x);
61 return *this;
62 }
63
64 Vc_ALWAYS_INLINE MaskBool(const MaskBool &) noexcept = default;
65 Vc_ALWAYS_INLINE MaskBool &operator=(const MaskBool &) noexcept = default;
66
67 template <typename T, typename = enable_if<(std::is_same<T, bool>::value ||
68 (std::is_fundamental<T>::value &&
69 sizeof(storage_type) == sizeof(T)))>>
70 constexpr operator T() const noexcept
71 {
72 return std::is_same<T, bool>::value ? T((data & 1) != 0) : aliasing_cast<T>(data);
73 }
74} Vc_MAY_ALIAS;
75
76template <typename A,
77 typename B,
78 typename std::enable_if<
79 std::is_convertible<A, bool>::value &&std::is_convertible<B, bool>::value,
80 int>::type = 0>
81constexpr bool operator==(A &&a, B &&b)
82{
83 return static_cast<bool>(a) == static_cast<bool>(b);
84}
85template <typename A,
86 typename B,
87 typename std::enable_if<
88 std::is_convertible<A, bool>::value &&std::is_convertible<B, bool>::value,
89 int>::type = 0>
90constexpr bool operator!=(A &&a, B &&b)
91{
92 return static_cast<bool>(a) != static_cast<bool>(b);
93}
94
95} // namespace Common
96} // namespace Vc
97
98#endif // VC_COMMON_MASKENTRY_H_