67 lines
2.3 KiB
C
67 lines
2.3 KiB
C
/*
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Copyright (c) 2010-2011, Intel Corporation
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Intel Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef ISPC_CPUID_H
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#define ISPC_CPUID_H 1
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#ifdef _MSC_VER
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// Provides a __cpuid() function with same signature as below
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#include <intrin.h>
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#else
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static void __cpuid(int info[4], int infoType) {
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__asm__ __volatile__ ("cpuid"
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: "=a" (info[0]), "=b" (info[1]), "=c" (info[2]), "=d" (info[3])
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: "0" (infoType));
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}
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#endif
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inline bool CPUSupportsSSE2() {
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int info[4];
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__cpuid(info, 1);
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return (info[3] & (1 << 26)) != 0;
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}
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inline bool CPUSupportsSSE4() {
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int info[4];
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__cpuid(info, 1);
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return (info[2] & (1 << 19)) != 0;
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}
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inline bool CPUSupportsAVX() {
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int info[4];
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__cpuid(info, 1);
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return (info[2] & (1 << 28)) != 0;
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}
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#endif // ISPC_CPUID_H
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