1 files changed, 65 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c
new file mode 100644
index 0000000000..eb4365fe32
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/init-arch.c
@@ -0,0 +1,65 @@
+/* Initialize CPU feature data.
+   This file is part of the GNU C Library.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+   Contributed by Ulrich Drepper <drepper@redhat.com>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include "init-arch.h"
+
+
+struct cpu_features __cpu_features attribute_hidden;
+
+
+void
+__init_cpu_features (void)
+{
+  unsigned int ebx;
+  unsigned int ecx;
+  unsigned int edx;
+
+  asm volatile ("cpuid"
+		: "=a" (__cpu_features.max_cpuid), "=b" (ebx), "=c" (ecx),
+		  "=d" (edx)
+		: "0" (0));
+
+  /* This spells out "GenuineIntel".  */
+  if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
+    {
+      __cpu_features.kind = arch_kind_intel;
+
+      asm volatile ("cpuid"
+		    : "=a" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].eax),
+		      "=b" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ebx),
+		      "=c" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ecx),
+		      "=d" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].edx)
+		    : "0" (1));
+    }
+  /* This spells out "AuthenticAMD".  */
+  else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
+    {
+      __cpu_features.kind = arch_kind_amd;
+
+      asm volatile ("cpuid"
+		    : "=a" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].eax),
+		      "=b" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ebx),
+		      "=c" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ecx),
+		      "=d" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].edx)
+		    : "0" (1));
+    }
+  else
+    __cpu_features.kind = arch_kind_other;
+}