Vc sources now use completely namespaced includes to work around messed up MacOS X
[u/mrichter/AliRoot.git] / Vc / src / support.cpp
CommitLineData
f22341db 1/* This file is part of the Vc library.
2
3 Copyright (C) 2010-2012 Matthias Kretz <kretz@kde.org>
4
5 Vc is free software: you can redistribute it and/or modify
6 it under the terms of the GNU Lesser General Public License as
7 published by the Free Software Foundation, either version 3 of
8 the License, or (at your option) any later version.
9
10 Vc is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with Vc. If not, see <http://www.gnu.org/licenses/>.
17
18*/
19
20#include <Vc/global.h>
21#include <Vc/cpuid.h>
7c616f25 22#include "Vc/common/support.h"
f22341db 23
24#ifdef VC_MSVC
25#include <intrin.h>
26#endif
27
28namespace Vc
29{
30
31#ifdef VC_GCC
32 __attribute__((target("no-sse2,no-avx")))
33#endif
34bool isImplementationSupported(Implementation impl)
35{
36 CpuId::init();
37 // for AVX we need to check for OSXSAVE and AVX
38
39 switch (impl) {
40 case ScalarImpl:
41 return true;
42 case SSE2Impl:
43 return CpuId::hasSse2();
44 case SSE3Impl:
45 return CpuId::hasSse3();
46 case SSSE3Impl:
47 return CpuId::hasSsse3();
48 case SSE41Impl:
49 return CpuId::hasSse41();
50 case SSE42Impl:
51 return CpuId::hasSse42();
52 case SSE4aImpl:
53 return CpuId::hasSse4a();
54 case XopImpl:
55 return CpuId::hasXop();
56 case Fma4Impl:
57 return CpuId::hasFma4();
58 case AVXImpl:
59#if defined(VC_MSVC) && VC_MSVC >= 160040219 // MSVC 2010 SP1 introduced _xgetbv
60 unsigned long long xcrFeatureMask = _xgetbv(_XCR_XFEATURE_ENABLED_MASK);
61 return (xcrFeatureMask & 0x6) != 0;
62#elif !defined(VC_NO_XGETBV)
63 if (CpuId::hasOsxsave() && CpuId::hasAvx()) {
64 unsigned int eax;
65 asm("xgetbv" : "=a"(eax) : "c"(0) : "edx");
66 return (eax & 0x06) == 0x06;
67 }
68#endif
69 return false;
70 }
71 return false;
72}
73
74} // namespace Vc
75
76// vim: sw=4 sts=4 et tw=100