cannam@127: /*
cannam@127:  * Copyright (c) 2003, 2007-14 Matteo Frigo
cannam@127:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
cannam@127:  *
cannam@127:  * This program is free software; you can redistribute it and/or modify
cannam@127:  * it under the terms of the GNU General Public License as published by
cannam@127:  * the Free Software Foundation; either version 2 of the License, or
cannam@127:  * (at your option) any later version.
cannam@127:  *
cannam@127:  * This program is distributed in the hope that it will be useful,
cannam@127:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@127:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@127:  * GNU General Public License for more details.
cannam@127:  *
cannam@127:  * You should have received a copy of the GNU General Public License
cannam@127:  * along with this program; if not, write to the Free Software
cannam@127:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
cannam@127:  *
cannam@127:  */
cannam@127: 
cannam@127: 
cannam@127: #include "ifftw.h"
cannam@127: 
cannam@127: #if HAVE_AVX_128_FMA
cannam@127: 
cannam@127: #if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
cannam@127: #    include "amd64-cpuid.h"
cannam@127: #else
cannam@127: #    include "x86-cpuid.h"
cannam@127: #endif
cannam@127: 
cannam@127: int X(have_simd_avx_128_fma)(void)
cannam@127: {
cannam@127:        static int init = 0, res = 0;
cannam@127:        int eax,ebx,ecx,edx;
cannam@127: 
cannam@127:        if (!init)
cannam@127:        {
cannam@127: 	 /* Check if this is an AMD CPU */
cannam@127: 	 cpuid_all(0,0,&eax,&ebx,&ecx,&edx);
cannam@127: 
cannam@127: 	 /* 0x68747541: "Auth"  , 0x444d4163: "enti"  , 0x69746e65: "cAMD" */
cannam@127: 	 if (ebx==0x68747541 && ecx==0x444d4163 && edx==0x69746e65)
cannam@127: 	 {
cannam@127: 	   /* OK, this is an AMD CPU. Check if we support FMA4 */
cannam@127: 	   cpuid_all(0x80000001,0,&eax,&ebx,&ecx,&edx);
cannam@127: 	   if(ecx & (1<<16))
cannam@127: 	     {
cannam@127: 	       res = 1;
cannam@127: 	     }
cannam@127: 	 }
cannam@127: 	 init = 1;
cannam@127:        }
cannam@127:        return res;
cannam@127: }
cannam@127: 
cannam@127: #endif