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1 /*
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2 * Copyright (c) 2003, 2007-11 Matteo Frigo
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3 * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology
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4 *
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5 * This program is free software; you can redistribute it and/or modify
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6 * it under the terms of the GNU General Public License as published by
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7 * the Free Software Foundation; either version 2 of the License, or
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8 * (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful,
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11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 * GNU General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU General Public License
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16 * along with this program; if not, write to the Free Software
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17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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18 *
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19 */
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20
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21
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22 #include "ifftw.h"
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23
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24 #if HAVE_AVX
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25
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26 #if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
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27
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28 #include "amd64-cpuid.h"
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29
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30 int X(have_simd_avx)(void)
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31 {
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32 static int init = 0, res;
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33
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34 if (!init) {
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35 res = 1
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36 && ((cpuid_ecx(1) & 0x18000000) == 0x18000000)
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37 && ((xgetbv_eax(0) & 0x6) == 0x6);
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38 init = 1;
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39 }
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40 return res;
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41 }
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42
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43 #else /* 32-bit code */
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44
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45 #include "x86-cpuid.h"
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46
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47 int X(have_simd_avx)(void)
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48 {
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49 static int init = 0, res;
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50
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51 if (!init) {
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52 res = !is_386()
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53 && has_cpuid()
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54 && ((cpuid_ecx(1) & 0x18000000) == 0x18000000)
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55 && ((xgetbv_eax(0) & 0x6) == 0x6);
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56 init = 1;
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57 }
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58 return res;
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59 }
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60 #endif
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61
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62 #endif
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