cannam@167: /* cannam@167: * Copyright (c) 2003, 2007-14 Matteo Frigo cannam@167: * Copyright (c) 2003, 2007-14 Massachusetts Institute of Technology cannam@167: * cannam@167: * This program is free software; you can redistribute it and/or modify cannam@167: * it under the terms of the GNU General Public License as published by cannam@167: * the Free Software Foundation; either version 2 of the License, or cannam@167: * (at your option) any later version. cannam@167: * cannam@167: * This program is distributed in the hope that it will be useful, cannam@167: * but WITHOUT ANY WARRANTY; without even the implied warranty of cannam@167: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the cannam@167: * GNU General Public License for more details. cannam@167: * cannam@167: * You should have received a copy of the GNU General Public License cannam@167: * along with this program; if not, write to the Free Software cannam@167: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA cannam@167: * cannam@167: */ cannam@167: cannam@167: cannam@167: #include "kernel/ifftw.h" cannam@167: cannam@167: #if HAVE_AVX cannam@167: cannam@167: #if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64) cannam@167: # include "amd64-cpuid.h" cannam@167: #else cannam@167: # include "x86-cpuid.h" cannam@167: #endif cannam@167: cannam@167: int X(have_simd_avx)(void) cannam@167: { cannam@167: static int init = 0, res = 0; cannam@167: int max_stdfn, eax, ebx, ecx, edx; cannam@167: cannam@167: if (!init) { cannam@167: cpuid_all(0,0,&eax,&ebx,&ecx,&edx); cannam@167: max_stdfn = eax; cannam@167: if (max_stdfn >= 0x1) { cannam@167: /* have AVX and OSXSAVE? (implies XGETBV exists) */ cannam@167: cpuid_all(0x1, 0, &eax, &ebx, &ecx, &edx); cannam@167: if ((ecx & 0x18000000) == 0x18000000) { cannam@167: /* have OS support for XMM, YMM? */ cannam@167: res = ((xgetbv_eax(0) & 0x6) == 0x6); cannam@167: } cannam@167: } cannam@167: init = 1; cannam@167: } cannam@167: return res; cannam@167: } cannam@167: cannam@167: #endif cannam@167: