diff --git a/sysdeps/i386/dl-machine.h b/sysdeps/i386/dl-machine.h
index 99a72f6..57d4a0b 100644
--- a/sysdeps/i386/dl-machine.h
+++ b/sysdeps/i386/dl-machine.h
@@ -233,14 +233,14 @@ _dl_start_user:\n\
 static inline void __attribute__ ((unused))
 dl_platform_init (void)
 {
-  if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
-    /* Avoid an empty string which would disturb us.  */
-    GLRO(dl_platform) = NULL;
-
-#ifdef SHARED
+#if IS_IN (rtld)
   /* init_cpu_features has been called early from __libc_start_main in
      static executable.  */
   init_cpu_features (&GLRO(dl_x86_cpu_features));
+#else
+  if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
+    /* Avoid an empty string which would disturb us.  */
+    GLRO(dl_platform) = NULL;
 #endif
 }
 
diff --git a/sysdeps/i386/dl-procinfo.c b/sysdeps/i386/dl-procinfo.c
index b832830..7237f77 100644
--- a/sysdeps/i386/dl-procinfo.c
+++ b/sysdeps/i386/dl-procinfo.c
@@ -17,10 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-/* This information must be kept in sync with the _DL_HWCAP_COUNT and
-   _DL_PLATFORM_COUNT definitions in procinfo.h.
-
-   If anything should be added here check whether the size of each string
+/* If anything should be added here check whether the size of each string
    is still ok with the given array size.
 
    All the #ifdefs in the definitions are quite irritating but
@@ -64,21 +61,5 @@ PROCINFO_CLASS const char _dl_x86_cap_flags[32][8]
 ,
 #endif
 
-#if !defined PROCINFO_DECL && defined SHARED
-  ._dl_x86_platforms
-#else
-PROCINFO_CLASS const char _dl_x86_platforms[4][5]
-#endif
-#ifndef PROCINFO_DECL
-= {
-    "i386", "i486", "i586", "i686"
-  }
-#endif
-#if !defined SHARED || defined PROCINFO_DECL
-;
-#else
-,
-#endif
-
 #undef PROCINFO_DECL
 #undef PROCINFO_CLASS
diff --git a/sysdeps/i386/dl-procinfo.h b/sysdeps/i386/dl-procinfo.h
deleted file mode 100644
index 9c38846..0000000
--- a/sysdeps/i386/dl-procinfo.h
+++ /dev/null
@@ -1,102 +0,0 @@
-/* i386 version of processor capability information handling macros.
-   Copyright (C) 1998-2017 Free Software Foundation, Inc.
-   This file is part of the GNU C Library.
-   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
-
-   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, see
-   <http://www.gnu.org/licenses/>.  */
-
-#ifndef _DL_PROCINFO_H
-#define _DL_PROCINFO_H	1
-#include <ldsodefs.h>
-
-#define _DL_HWCAP_COUNT 32
-
-#define _DL_PLATFORMS_COUNT	4
-
-/* Start at 48 to reserve some space.  */
-#define _DL_FIRST_PLATFORM	48
-/* Mask to filter out platforms.  */
-#define _DL_HWCAP_PLATFORM	(((1ULL << _DL_PLATFORMS_COUNT) - 1) \
-				 << _DL_FIRST_PLATFORM)
-
-enum
-{
-  HWCAP_I386_FPU   = 1 << 0,
-  HWCAP_I386_VME   = 1 << 1,
-  HWCAP_I386_DE    = 1 << 2,
-  HWCAP_I386_PSE   = 1 << 3,
-  HWCAP_I386_TSC   = 1 << 4,
-  HWCAP_I386_MSR   = 1 << 5,
-  HWCAP_I386_PAE   = 1 << 6,
-  HWCAP_I386_MCE   = 1 << 7,
-  HWCAP_I386_CX8   = 1 << 8,
-  HWCAP_I386_APIC  = 1 << 9,
-  HWCAP_I386_SEP   = 1 << 11,
-  HWCAP_I386_MTRR  = 1 << 12,
-  HWCAP_I386_PGE   = 1 << 13,
-  HWCAP_I386_MCA   = 1 << 14,
-  HWCAP_I386_CMOV  = 1 << 15,
-  HWCAP_I386_FCMOV = 1 << 16,
-  HWCAP_I386_MMX   = 1 << 23,
-  HWCAP_I386_OSFXSR = 1 << 24,
-  HWCAP_I386_XMM   = 1 << 25,
-  HWCAP_I386_XMM2  = 1 << 26,
-  HWCAP_I386_AMD3D = 1 << 31,
-
-  /* XXX Which others to add here?  */
-  HWCAP_IMPORTANT = (HWCAP_I386_XMM2)
-
-};
-
-/* We cannot provide a general printing function.  */
-#define _dl_procinfo(type, word) -1
-
-static inline const char *
-__attribute__ ((unused))
-_dl_hwcap_string (int idx)
-{
-  return GLRO(dl_x86_cap_flags)[idx];
-};
-
-static inline int
-__attribute__ ((unused, always_inline))
-_dl_string_hwcap (const char *str)
-{
-  int i;
-
-  for (i = 0; i < _DL_HWCAP_COUNT; i++)
-    {
-      if (strcmp (str, GLRO(dl_x86_cap_flags)[i]) == 0)
-	return i;
-    }
-  return -1;
-};
-
-static inline int
-__attribute__ ((unused, always_inline))
-_dl_string_platform (const char *str)
-{
-  int i;
-
-  if (str != NULL)
-    for (i = 0; i < _DL_PLATFORMS_COUNT; ++i)
-      {
-	if (strcmp (str, GLRO(dl_x86_platforms)[i]) == 0)
-	  return _DL_FIRST_PLATFORM + i;
-      }
-  return -1;
-};
-
-#endif /* dl-procinfo.h */
diff --git a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
index d49638c..a3a5f9d 100644
--- a/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
+++ b/sysdeps/unix/sysv/linux/i386/dl-procinfo.h
@@ -17,9 +17,7 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-#include <sysdeps/i386/dl-procinfo.h>
-#include <ldsodefs.h>
-
+#include <sysdeps/x86/dl-procinfo.h>
 
 #undef _dl_procinfo
 static inline int
@@ -36,7 +34,7 @@ _dl_procinfo (unsigned int type, unsigned long int word)
 
   _dl_printf ("AT_HWCAP:   ");
 
-  for (i = 0; i < _DL_HWCAP_COUNT; ++i)
+  for (i = 0; i < 32; ++i)
     if (word & (1 << i))
       _dl_printf (" %s", GLRO(dl_x86_cap_flags)[i]);
 
diff --git a/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h
index 7829e1c..7b45fe4 100644
--- a/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h
+++ b/sysdeps/unix/sysv/linux/x86_64/dl-procinfo.h
@@ -1,5 +1,5 @@
 #if IS_IN (ldconfig)
 # include <sysdeps/unix/sysv/linux/i386/dl-procinfo.h>
 #else
-# include <sysdeps/generic/dl-procinfo.h>
+# include <sysdeps/x86/dl-procinfo.h>
 #endif
diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index f30918d..b481f50 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -18,6 +18,7 @@
 
 #include <cpuid.h>
 #include <cpu-features.h>
+#include <dl-hwcap.h>
 
 static void
 get_common_indeces (struct cpu_features *cpu_features,
@@ -310,4 +311,51 @@ no_cpuid:
   cpu_features->family = family;
   cpu_features->model = model;
   cpu_features->kind = kind;
+
+#if IS_IN (rtld)
+  /* Reuse dl_platform, dl_hwcap and dl_hwcap_mask for x86.  */
+  GLRO(dl_platform) = NULL;
+  GLRO(dl_hwcap) = 0;
+  GLRO(dl_hwcap_mask) = HWCAP_IMPORTANT;
+
+# ifdef __x86_64__
+  if (cpu_features->kind == arch_kind_intel)
+    {
+      if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
+	  && CPU_FEATURES_CPU_P (cpu_features, AVX512CD))
+	{
+	  if (CPU_FEATURES_CPU_P (cpu_features, AVX512ER))
+	    {
+	      if (CPU_FEATURES_CPU_P (cpu_features, AVX512PF))
+		GLRO(dl_platform) = "xeon_phi";
+	    }
+	  else
+	    {
+	      if (CPU_FEATURES_CPU_P (cpu_features, AVX512BW)
+		  && CPU_FEATURES_CPU_P (cpu_features, AVX512DQ)
+		  && CPU_FEATURES_CPU_P (cpu_features, AVX512VL))
+		GLRO(dl_hwcap) |= HWCAP_X86_AVX512_1;
+	    }
+	}
+
+      if (GLRO(dl_platform) == NULL
+	  && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable)
+	  && CPU_FEATURES_ARCH_P (cpu_features, FMA_Usable)
+	  && CPU_FEATURES_CPU_P (cpu_features, BMI1)
+	  && CPU_FEATURES_CPU_P (cpu_features, BMI2)
+	  && CPU_FEATURES_CPU_P (cpu_features, LZCNT)
+	  && CPU_FEATURES_CPU_P (cpu_features, MOVBE)
+	  && CPU_FEATURES_CPU_P (cpu_features, POPCNT))
+	GLRO(dl_platform) = "haswell";
+    }
+# else
+  if (CPU_FEATURES_CPU_P (cpu_features, SSE2))
+    GLRO(dl_hwcap) |= HWCAP_X86_SSE2;
+
+  if (CPU_FEATURES_ARCH_P (cpu_features, I686))
+    GLRO(dl_platform) = "i686";
+  else if (CPU_FEATURES_ARCH_P (cpu_features, I586))
+    GLRO(dl_platform) = "i586";
+# endif
+#endif
 }
diff --git a/sysdeps/x86/cpu-features.h b/sysdeps/x86/cpu-features.h
index 85a39e7..31c7c80 100644
--- a/sysdeps/x86/cpu-features.h
+++ b/sysdeps/x86/cpu-features.h
@@ -57,8 +57,13 @@
 #define bit_cpu_FMA		(1 << 12)
 #define bit_cpu_FMA4		(1 << 16)
 #define bit_cpu_HTT		(1 << 28)
+#define bit_cpu_LZCNT		(1 << 5)
+#define bit_cpu_MOVBE		(1 << 22)
+#define bit_cpu_POPCNT		(1 << 23)
 
 /* COMMON_CPUID_INDEX_7.  */
+#define bit_cpu_BMI1		(1 << 3)
+#define bit_cpu_BMI2		(1 << 8)
 #define bit_cpu_ERMS		(1 << 9)
 #define bit_cpu_RTM		(1 << 11)
 #define bit_cpu_AVX2		(1 << 5)
@@ -258,6 +263,11 @@ extern const struct cpu_features *__get_cpu_features (void)
 # define index_cpu_POPCOUNT	COMMON_CPUID_INDEX_1
 # define index_cpu_OSXSAVE	COMMON_CPUID_INDEX_1
 # define index_cpu_HTT		COMMON_CPUID_INDEX_1
+# define index_cpu_BMI1		COMMON_CPUID_INDEX_7
+# define index_cpu_BMI2		COMMON_CPUID_INDEX_7
+# define index_cpu_LZCNT	COMMON_CPUID_INDEX_1
+# define index_cpu_MOVBE	COMMON_CPUID_INDEX_1
+# define index_cpu_POPCNT	COMMON_CPUID_INDEX_1
 
 # define reg_CX8		edx
 # define reg_CMOV		edx
@@ -282,6 +292,11 @@ extern const struct cpu_features *__get_cpu_features (void)
 # define reg_POPCOUNT		ecx
 # define reg_OSXSAVE		ecx
 # define reg_HTT		edx
+# define reg_BMI1		ebx
+# define reg_BMI2		ebx
+# define reg_LZCNT		ecx
+# define reg_MOVBE		ecx
+# define reg_POPCNT		ecx
 
 # define index_arch_Fast_Rep_String	FEATURE_INDEX_1
 # define index_arch_Fast_Copy_Backward	FEATURE_INDEX_1
diff --git a/sysdeps/x86/dl-hwcap.h b/sysdeps/x86/dl-hwcap.h
new file mode 100644
index 0000000..c956684
--- /dev/null
+++ b/sysdeps/x86/dl-hwcap.h
@@ -0,0 +1,75 @@
+/* x86 version of hardware capability information handling macros.
+   Copyright (C) 2017 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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _DL_HWCAP_H
+#define _DL_HWCAP_H
+
+#if IS_IN (ldconfig)
+/* Since ldconfig processes both i386 and x86-64 libraries, it needs
+   to cover all platforms and hardware capabilities.  */
+# define HWCAP_PLATFORMS_START	0
+# define HWCAP_PLATFORMS_COUNT	4
+# define HWCAP_START		0
+# define HWCAP_COUNT		2
+# define HWCAP_IMPORTANT	(HWCAP_X86_SSE2 | HWCAP_X86_AVX512_1)
+#elif defined __x86_64__
+/* For 64 bit, only cover x86-64 platforms and capabilities.  */
+# define HWCAP_PLATFORMS_START	2
+# define HWCAP_PLATFORMS_COUNT	4
+# define HWCAP_START		1
+# define HWCAP_COUNT		2
+# define HWCAP_IMPORTANT	(HWCAP_X86_AVX512_1)
+#else
+/* For 32 bit, only cover i586, i686 and SSE2.  */
+# define HWCAP_PLATFORMS_START	0
+# define HWCAP_PLATFORMS_COUNT	2
+# define HWCAP_START		0
+# define HWCAP_COUNT		1
+# define HWCAP_IMPORTANT	(HWCAP_X86_SSE2)
+#endif
+
+enum
+{
+  HWCAP_X86_SSE2		= 1 << 0,
+  HWCAP_X86_AVX512_1		= 1 << 1
+};
+
+static inline const char *
+__attribute__ ((unused))
+_dl_hwcap_string (int idx)
+{
+  return GLRO(dl_x86_hwcap_flags)[idx];
+};
+
+static inline int
+__attribute__ ((unused, always_inline))
+_dl_string_hwcap (const char *str)
+{
+  int i;
+
+  for (i = HWCAP_START; i < HWCAP_COUNT; i++)
+    {
+      if (strcmp (str, GLRO(dl_x86_hwcap_flags)[i]) == 0)
+	return i;
+    }
+  return -1;
+};
+
+/* We cannot provide a general printing function.  */
+#define _dl_procinfo(type, word) -1
+
+#endif /* dl-hwcap.h */
diff --git a/sysdeps/x86/dl-procinfo.c b/sysdeps/x86/dl-procinfo.c
index 9d154bf..43ab8fe 100644
--- a/sysdeps/x86/dl-procinfo.c
+++ b/sysdeps/x86/dl-procinfo.c
@@ -16,7 +16,11 @@
    License along with the GNU C Library; if not, see
    <http://www.gnu.org/licenses/>.  */
 
-/* If anything should be added here check whether the size of each string
+/* This information must be kept in sync with the _DL_HWCAP_COUNT,
+   HWCAP_PLATFORMS_START and HWCAP_PLATFORMS_COUNT definitions in
+   dl-hwcap.h.
+
+   If anything should be added here check whether the size of each string
    is still ok with the given array size.
 
    All the #ifdefs in the definitions are quite irritating but
@@ -50,3 +54,35 @@ PROCINFO_CLASS struct cpu_features _dl_x86_cpu_features
 ,
 # endif
 #endif
+
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_x86_hwcap_flags
+#else
+PROCINFO_CLASS const char _dl_x86_hwcap_flags[2][9]
+#endif
+#ifndef PROCINFO_DECL
+= {
+    "sse2", "avx512_1"
+  }
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
+
+#if !defined PROCINFO_DECL && defined SHARED
+  ._dl_x86_platforms
+#else
+PROCINFO_CLASS const char _dl_x86_platforms[4][9]
+#endif
+#ifndef PROCINFO_DECL
+= {
+    "i586", "i686", "haswell", "xeon_phi"
+  }
+#endif
+#if !defined SHARED || defined PROCINFO_DECL
+;
+#else
+,
+#endif
diff --git a/sysdeps/x86/dl-procinfo.h b/sysdeps/x86/dl-procinfo.h
new file mode 100644
index 0000000..5feb146
--- /dev/null
+++ b/sysdeps/x86/dl-procinfo.h
@@ -0,0 +1,48 @@
+/* x86 version of processor capability information handling macros.
+   Copyright (C) 2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef _DL_PROCINFO_H
+#define _DL_PROCINFO_H	1
+#include <ldsodefs.h>
+#include <dl-hwcap.h>
+
+#define _DL_HWCAP_COUNT		HWCAP_COUNT
+#define _DL_PLATFORMS_COUNT	HWCAP_PLATFORMS_COUNT
+
+/* Start at 48 to reserve spaces for hardware capabilities.  */
+#define _DL_FIRST_PLATFORM	48
+/* Mask to filter out platforms.  */
+#define _DL_HWCAP_PLATFORM	(((1ULL << _DL_PLATFORMS_COUNT) - 1) \
+				 << _DL_FIRST_PLATFORM)
+
+static inline int
+__attribute__ ((unused, always_inline))
+_dl_string_platform (const char *str)
+{
+  int i;
+
+  if (str != NULL)
+    for (i = HWCAP_PLATFORMS_START; i < HWCAP_PLATFORMS_COUNT; ++i)
+      {
+	if (strcmp (str, GLRO(dl_x86_platforms)[i]) == 0)
+	  return _DL_FIRST_PLATFORM + i;
+      }
+  return -1;
+};
+
+#endif /* dl-procinfo.h */
diff --git a/sysdeps/x86_64/dl-machine.h b/sysdeps/x86_64/dl-machine.h
index daf4d8c..0015db4 100644
--- a/sysdeps/x86_64/dl-machine.h
+++ b/sysdeps/x86_64/dl-machine.h
@@ -240,14 +240,14 @@ _dl_start_user:\n\
 static inline void __attribute__ ((unused))
 dl_platform_init (void)
 {
-  if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
-    /* Avoid an empty string which would disturb us.  */
-    GLRO(dl_platform) = NULL;
-
-#ifdef SHARED
+#if IS_IN (rtld)
   /* init_cpu_features has been called early from __libc_start_main in
      static executable.  */
   init_cpu_features (&GLRO(dl_x86_cpu_features));
+#else
+  if (GLRO(dl_platform) != NULL && *GLRO(dl_platform) == '\0')
+    /* Avoid an empty string which would disturb us.  */
+    GLRO(dl_platform) = NULL;
 #endif
 }
 
