diff src/fftw-3.3.8/simd-support/avx-128-fma.c @ 167:bd3cc4d1df30

Add FFTW 3.3.8 source, and a Linux build

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/fftw-3.3.8/simd-support/avx-128-fma.c	Tue Nov 19 14:52:55 2019 +0000
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2003, 2007-14 Matteo Frigo
+ * Copyright (c) 2003, 2007-14 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 "kernel/ifftw.h"
+
+#if HAVE_AVX_128_FMA
+
+#if defined(__x86_64__) || defined(_M_X64) || defined(_M_AMD64)
+#    include "amd64-cpuid.h"
+#else
+#    include "x86-cpuid.h"
+#endif
+
+int X(have_simd_avx_128_fma)(void)
+{
+       static int init = 0, res = 0;
+       int eax,ebx,ecx,edx;
+
+       if (!init)
+       {
+	 /* Check if this is an AMD CPU */
+	 cpuid_all(0,0,&eax,&ebx,&ecx,&edx);
+
+	 /* 0x68747541: "Auth"  , 0x444d4163: "enti"  , 0x69746e65: "cAMD" */
+	 if (ebx==0x68747541 && ecx==0x444d4163 && edx==0x69746e65)
+	 {
+	   /* OK, this is an AMD CPU. Check if we support FMA4 */
+	   cpuid_all(0x80000001,0,&eax,&ebx,&ecx,&edx);
+	   if(ecx & (1<<16))
+	     {
+	       res = 1;
+	     }
+	 }
+	 init = 1;
+       }
+       return res;
+}
+
+#endif