Chris@42: /*
Chris@42:  * Copyright (c) 2003, 2007-14 Matteo Frigo
Chris@42:  * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology
Chris@42:  *
Chris@42:  * This program is free software; you can redistribute it and/or modify
Chris@42:  * it under the terms of the GNU General Public License as published by
Chris@42:  * the Free Software Foundation; either version 2 of the License, or
Chris@42:  * (at your option) any later version.
Chris@42:  *
Chris@42:  * This program is distributed in the hope that it will be useful,
Chris@42:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@42:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@42:  * GNU General Public License for more details.
Chris@42:  *
Chris@42:  * You should have received a copy of the GNU General Public License
Chris@42:  * along with this program; if not, write to the Free Software
Chris@42:  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
Chris@42:  *
Chris@42:  */
Chris@42: 
Chris@42: 
Chris@42: #include "ifftw.h"
Chris@42: 
Chris@42: #if HAVE_AVX_128_FMA
Chris@42: 
Chris@42: #if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
Chris@42: #    include "amd64-cpuid.h"
Chris@42: #else
Chris@42: #    include "x86-cpuid.h"
Chris@42: #endif
Chris@42: 
Chris@42: int X(have_simd_avx_128_fma)(void)
Chris@42: {
Chris@42:        static int init = 0, res = 0;
Chris@42:        int eax,ebx,ecx,edx;
Chris@42: 
Chris@42:        if (!init)
Chris@42:        {
Chris@42: 	 /* Check if this is an AMD CPU */
Chris@42: 	 cpuid_all(0,0,&eax,&ebx,&ecx,&edx);
Chris@42: 
Chris@42: 	 /* 0x68747541: "Auth"  , 0x444d4163: "enti"  , 0x69746e65: "cAMD" */
Chris@42: 	 if (ebx==0x68747541 && ecx==0x444d4163 && edx==0x69746e65)
Chris@42: 	 {
Chris@42: 	   /* OK, this is an AMD CPU. Check if we support FMA4 */
Chris@42: 	   cpuid_all(0x80000001,0,&eax,&ebx,&ecx,&edx);
Chris@42: 	   if(ecx & (1<<16))
Chris@42: 	     {
Chris@42: 	       res = 1;
Chris@42: 	     }
Chris@42: 	 }
Chris@42: 	 init = 1;
Chris@42:        }
Chris@42:        return res;
Chris@42: }
Chris@42: 
Chris@42: #endif