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///////////////////////////////////////////////////////////////////////////
//
// Copyright (c) 2009-2014 DreamWorks Animation LLC.
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of DreamWorks Animation nor the names of
// its contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
///////////////////////////////////////////////////////////////////////////
#include "ImfSimd.h"
#include "ImfSystemSpecific.h"
#include "ImfNamespace.h"
#include "OpenEXRConfig.h"
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
namespace {
#if defined(IMF_HAVE_SSE2) && defined(__GNUC__)
// Helper functions for gcc + SSE enabled
void cpuid(int n, int &eax, int &ebx, int &ecx, int &edx)
{
__asm__ __volatile__ (
"cpuid"
: /* Output */ "=a"(eax), "=b"(ebx), "=c"(ecx), "=d"(edx)
: /* Input */ "a"(n)
: /* Clobber */);
}
#else // IMF_HAVE_SSE2 && __GNUC__
// Helper functions for generic compiler - all disabled
void cpuid(int n, int &eax, int &ebx, int &ecx, int &edx)
{
eax = ebx = ecx = edx = 0;
}
#endif // IMF_HAVE_SSE2 && __GNUC__
#ifdef OPENEXR_IMF_HAVE_GCC_INLINE_ASM_AVX
void xgetbv(int n, int &eax, int &edx)
{
__asm__ __volatile__ (
"xgetbv"
: /* Output */ "=a"(eax), "=d"(edx)
: /* Input */ "c"(n)
: /* Clobber */);
}
#else // OPENEXR_IMF_HAVE_GCC_INLINE_ASM_AVX
void xgetbv(int n, int &eax, int &edx)
{
eax = edx = 0;
}
#endif // OPENEXR_IMF_HAVE_GCC_INLINE_ASM_AVX
} // namespace
CpuId::CpuId():
sse2(false),
sse3(false),
ssse3(false),
sse4_1(false),
sse4_2(false),
avx(false),
f16c(false)
{
bool osxsave = false;
int max = 0;
int eax, ebx, ecx, edx;
cpuid(0, max, ebx, ecx, edx);
if (max > 0)
{
cpuid(1, eax, ebx, ecx, edx);
sse2 = ( edx & (1<<26) );
sse3 = ( ecx & (1<< 0) );
ssse3 = ( ecx & (1<< 9) );
sse4_1 = ( ecx & (1<<19) );
sse4_2 = ( ecx & (1<<20) );
osxsave = ( ecx & (1<<27) );
avx = ( ecx & (1<<28) );
f16c = ( ecx & (1<<29) );
if (!osxsave)
{
avx = f16c = false;
}
else
{
xgetbv(0, eax, edx);
// eax bit 1 - SSE managed, bit 2 - AVX managed
if ((eax & 6) != 6)
{
avx = f16c = false;
}
}
}
}
OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
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