1 files changed, 70 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/init-arch.h b/sysdeps/x86_64/multiarch/init-arch.h
new file mode 100644
index 0000000000..86cd83dc4c
--- /dev/null
+++ b/sysdeps/x86_64/multiarch/init-arch.h
@@ -0,0 +1,70 @@
+/* This file is part of the GNU C Library.
+   Copyright (C) 2008 Free Software Foundation, Inc.
+
+   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 <sys/param.h>
+
+enum
+  {
+    INTEL_CPUID_INDEX_1 = 0,
+    /* Keep the following line at the end.  */
+    INTEL_CPUID_INDEX_MAX
+  };
+
+enum
+  {
+    AMD_CPUID_INDEX_1 = 0,
+    /* Keep the following line at the end.  */
+    AMD_CPUID_INDEX_MAX
+  };
+
+extern struct cpu_features
+{
+  enum
+    {
+      arch_kind_unknown = 0,
+      arch_kind_intel,
+      arch_kind_amd,
+      arch_kind_other
+    } kind;
+  int max_cpuid;
+  struct
+  {
+    unsigned int eax;
+    unsigned int ebx;
+    unsigned int ecx;
+    unsigned int edx;
+  } cpuid[MAX (INTEL_CPUID_INDEX_MAX, AMD_CPUID_INDEX_MAX)];
+} __cpu_features attribute_hidden;
+
+
+extern void __init_cpu_features (void) attribute_hidden;
+#define INIT_ARCH()\
+  do							\
+    if (__cpu_features.kind == arch_kind_unknown)	\
+      __init_cpu_features ();				\
+  while (0)
+
+/* Following are the feature tests used throughout libc.  */
+
+#define INTEL_HAS_POPCOUNT \
+  (__cpu_features.kind == arch_kind_intel				\
+   && (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ecx & (1 << 23)) != 0)
+
+#define AMD_HAS_POPCOUNT \
+  (__cpu_features.kind == arch_kind_amd				\
+   && (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ecx & (1 << 23)) != 0)