comparison src/fftw-3.3.3/simd-support/avx.c @ 10:37bf6b4a2645

Add FFTW3

+/*
+ * Copyright (c) 2003, 2007-11 Matteo Frigo
+ * Copyright (c) 2003, 2007-11 Massachusetts Institute of Technology
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+
+#include "ifftw.h"
+
+#if HAVE_AVX
+
+#if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
+
+#include "amd64-cpuid.h"
+
+int X(have_simd_avx)(void)
+{
+       static int init = 0, res;
+
+       if (!init) {
+	    res = 1 
+		 && ((cpuid_ecx(1) & 0x18000000) == 0x18000000)
+		 && ((xgetbv_eax(0) & 0x6) == 0x6);
+	    init = 1;
+       }
+       return res;
+}
+
+#else /* 32-bit code */
+
+#include "x86-cpuid.h"
+
+int X(have_simd_avx)(void)
+{
+       static int init = 0, res;
+
+       if (!init) {
+	    res =   !is_386() 
+		 && has_cpuid()
+		 && ((cpuid_ecx(1) & 0x18000000) == 0x18000000)
+		 && ((xgetbv_eax(0) & 0x6) == 0x6);
+	    init = 1;
+       }
+       return res;
+}
+#endif
+
+#endif