58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
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/*
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* Copyright (c) 2003, 2007-14 Matteo Frigo
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* Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#include "kernel/ifftw.h"
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#if HAVE_AVX_128_FMA
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#if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
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# include "amd64-cpuid.h"
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#else
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# include "x86-cpuid.h"
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#endif
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int X(have_simd_avx_128_fma)(void)
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{
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static int init = 0, res = 0;
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int eax,ebx,ecx,edx;
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if (!init)
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{
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/* Check if this is an AMD CPU */
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cpuid_all(0,0,&eax,&ebx,&ecx,&edx);
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/* 0x68747541: "Auth" , 0x444d4163: "enti" , 0x69746e65: "cAMD" */
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if (ebx==0x68747541 && ecx==0x444d4163 && edx==0x69746e65)
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{
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/* OK, this is an AMD CPU. Check if we support FMA4 */
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cpuid_all(0x80000001,0,&eax,&ebx,&ecx,&edx);
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if(ecx & (1<<16))
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{
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res = 1;
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}
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}
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init = 1;
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}
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return res;
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}
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#endif
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