Vc 1.4.1
SIMD Vector Classes for C++
support.h
1/* This file is part of the Vc library. {{{
2Copyright © 2010-2015 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
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8 * Redistributions in binary form must reproduce the above copyright
9 notice, this list of conditions and the following disclaimer in the
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15THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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20(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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24SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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26}}}*/
27
28#ifndef VC_COMMON_SUPPORT_H_
29#define VC_COMMON_SUPPORT_H_
30
31#ifndef VC_GLOBAL_H_
32#error "Vc/global.h must be included first!"
33#endif
34
35#if defined __x86_64__ || defined __amd64__ || defined __amd64 || defined __x86_64 || \
36 defined _M_AMD64 || defined __i386__
37#include <Vc/cpuid.h>
38#endif
39
40#if defined(Vc_GCC) && Vc_GCC >= 0x40400 && defined __SSE__
41#define Vc_TARGET_NO_SIMD __attribute__((target("no-sse2,no-avx")))
42#else
43#define Vc_TARGET_NO_SIMD
44#endif
45
46#include "common/macros.h"
47namespace Vc_VERSIONED_NAMESPACE
48{
49
61Vc_TARGET_NO_SIMD
63
75Vc_TARGET_NO_SIMD
77
97template<typename Impl>
98Vc_TARGET_NO_SIMD
99static inline bool isImplementationSupported()
100{
101 return isImplementationSupported(Impl::current()) &&
102 Impl::runs_on(extraInstructionsSupported());
103}
104
113Vc_TARGET_NO_SIMD
115
116#ifndef Vc_COMPILE_LIB
145Vc_TARGET_NO_SIMD
146#ifndef DOXYGEN
147static
148#endif
150{
151 return isImplementationSupported<Vc::CurrentImplementation>();
152}
153#endif // Vc_COMPILE_LIB
155
156}
157
158#undef Vc_TARGET_NO_SIMD
159
160#endif // VC_COMMON_SUPPORT_H_
Implementation
Enum to identify a certain SIMD instruction set.
Definition: global.h:467
unsigned int extraInstructionsSupported()
Determines the extra instructions supported by the current CPU.
Vc::Implementation bestImplementationSupported()
Determines the best supported implementation for the current system.
bool isImplementationSupported(Vc::Implementation impl)
Tests whether the given implementation is supported by the system the code is executing on.
bool currentImplementationSupported()
Tests that the CPU and Operating System support the vector unit which was compiled for.
Definition: support.h:149