Use x86-64 cacheinfo.c and sysconf.c for x86

Since _dl_x86_cpu_features is always available, we can use x86-64
cacheinfo.c and sysconf.c for both i386 and x86-64.

	* sysdeps/i386/i686/Makefile
	[$(subdir) == string] (sysdep_routines): Moved to ...
	* sysdeps/i386/Makefile: Here.
	* sysdeps/i386/i686/cacheinfo.c: Moved to ...
	* sysdeps/i386/cacheinfo.c: Here.
	* sysdeps/unix/sysv/linux/i386/sysconf.c: Removed.
	* sysdeps/unix/sysv/linux/i386/i686/sysconf.c: Likewise.
	* sysdeps/unix/sysv/linux/x86_64/sysconf.c: Moved to ...
	* sysdeps/unix/sysv/linux/x86/sysconf.c: Here.

2 files changed, 0 insertions, 510 deletions

diff --git a/sysdeps/unix/sysv/linux/i386/i686/sysconf.c b/sysdeps/unix/sysv/linux/i386/i686/sysconf.c
deleted file mode 100644
index cf79750de3..0000000000
--- a/sysdeps/unix/sysv/linux/i386/i686/sysconf.c
+++ /dev/null
@@ -1 +0,0 @@
-#include <sysdeps/unix/sysv/linux/x86_64/sysconf.c>
diff --git a/sysdeps/unix/sysv/linux/i386/sysconf.c b/sysdeps/unix/sysv/linux/i386/sysconf.c
deleted file mode 100644
index 0b5a681718..0000000000
--- a/sysdeps/unix/sysv/linux/i386/sysconf.c
+++ /dev/null
@@ -1,509 +0,0 @@
-/* Get file-specific information about a file.  Linux version.
-   Copyright (C) 2003-2015 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/>.  */
-
-#include <assert.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <hp-timing.h>
-
-static long int linux_sysconf (int name);
-
-
-static long int __attribute__ ((noinline))
-handle_i486 (int name)
-{
-  /* The processor only has a unified level 1 cache of 8k.  */
-  switch (name)
-    {
-    case _SC_LEVEL1_ICACHE_SIZE:
-    case _SC_LEVEL1_DCACHE_SIZE:
-      return 8 * 1024;
-
-    case _SC_LEVEL1_ICACHE_ASSOC:
-    case _SC_LEVEL1_DCACHE_ASSOC:
-      // XXX Anybody know this?
-      return 0;
-
-    case _SC_LEVEL1_ICACHE_LINESIZE:
-    case _SC_LEVEL1_DCACHE_LINESIZE:
-      // XXX Anybody know for sure?
-      return 16;
-
-    case _SC_LEVEL2_CACHE_SIZE:
-    case _SC_LEVEL2_CACHE_ASSOC:
-    case _SC_LEVEL2_CACHE_LINESIZE:
-    case _SC_LEVEL3_CACHE_SIZE:
-    case _SC_LEVEL3_CACHE_ASSOC:
-    case _SC_LEVEL3_CACHE_LINESIZE:
-    case _SC_LEVEL4_CACHE_SIZE:
-    case _SC_LEVEL4_CACHE_ASSOC:
-      /* Not available.  */
-      break;
-
-    default:
-      assert (! "cannot happen");
-    }
-
-  return -1;
-}
-
-
-static const struct intel_02_cache_info
-{
-  unsigned char idx;
-  unsigned char assoc;
-  unsigned char linesize;
-  unsigned char rel_name;
-  unsigned int size;
-} intel_02_known [] =
-  {
-#define M(sc) ((sc) - _SC_LEVEL1_ICACHE_SIZE)
-    { 0x06,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),    8192 },
-    { 0x08,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),   16384 },
-    { 0x09,  4, 32, M(_SC_LEVEL1_ICACHE_SIZE),   32768 },
-    { 0x0a,  2, 32, M(_SC_LEVEL1_DCACHE_SIZE),    8192 },
-    { 0x0c,  4, 32, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
-    { 0x0d,  4, 64, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
-    { 0x21,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x22,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),   524288 },
-    { 0x23,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  1048576 },
-    { 0x25,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
-    { 0x29,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
-    { 0x2c,  8, 64, M(_SC_LEVEL1_DCACHE_SIZE),   32768 },
-    { 0x30,  8, 64, M(_SC_LEVEL1_ICACHE_SIZE),   32768 },
-    { 0x39,  4, 64, M(_SC_LEVEL2_CACHE_SIZE),   131072 },
-    { 0x3a,  6, 64, M(_SC_LEVEL2_CACHE_SIZE),   196608 },
-    { 0x3b,  2, 64, M(_SC_LEVEL2_CACHE_SIZE),   131072 },
-    { 0x3c,  4, 64, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x3d,  6, 64, M(_SC_LEVEL2_CACHE_SIZE),   393216 },
-    { 0x3e,  4, 64, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x3f,  2, 64, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x41,  4, 32, M(_SC_LEVEL2_CACHE_SIZE),   131072 },
-    { 0x42,  4, 32, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x43,  4, 32, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x44,  4, 32, M(_SC_LEVEL2_CACHE_SIZE),  1048576 },
-    { 0x45,  4, 32, M(_SC_LEVEL2_CACHE_SIZE),  2097152 },
-    { 0x46,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
-    { 0x47,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  8388608 },
-    { 0x48, 12, 64, M(_SC_LEVEL2_CACHE_SIZE),  3145728 },
-    { 0x49, 16, 64, M(_SC_LEVEL2_CACHE_SIZE),  4194304 },
-    { 0x4a, 12, 64, M(_SC_LEVEL3_CACHE_SIZE),  6291456 },
-    { 0x4b, 16, 64, M(_SC_LEVEL3_CACHE_SIZE),  8388608 },
-    { 0x4c, 12, 64, M(_SC_LEVEL3_CACHE_SIZE), 12582912 },
-    { 0x4d, 16, 64, M(_SC_LEVEL3_CACHE_SIZE), 16777216 },
-    { 0x4e, 24, 64, M(_SC_LEVEL2_CACHE_SIZE),  6291456 },
-    { 0x60,  8, 64, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
-    { 0x66,  4, 64, M(_SC_LEVEL1_DCACHE_SIZE),    8192 },
-    { 0x67,  4, 64, M(_SC_LEVEL1_DCACHE_SIZE),   16384 },
-    { 0x68,  4, 64, M(_SC_LEVEL1_DCACHE_SIZE),   32768 },
-    { 0x78,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),  1048576 },
-    { 0x79,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),   131072 },
-    { 0x7a,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x7b,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x7c,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),  1048576 },
-    { 0x7d,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),  2097152 },
-    { 0x7f,  2, 64, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x82,  8, 32, M(_SC_LEVEL2_CACHE_SIZE),   262144 },
-    { 0x83,  8, 32, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x84,  8, 32, M(_SC_LEVEL2_CACHE_SIZE),  1048576 },
-    { 0x85,  8, 32, M(_SC_LEVEL2_CACHE_SIZE),  2097152 },
-    { 0x86,  4, 64, M(_SC_LEVEL2_CACHE_SIZE),   524288 },
-    { 0x87,  8, 64, M(_SC_LEVEL2_CACHE_SIZE),  1048576 },
-    { 0xd0,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),   524288 },
-    { 0xd1,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),  1048576 },
-    { 0xd2,  4, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
-    { 0xd6,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  1048576 },
-    { 0xd7,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
-    { 0xd8,  8, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
-    { 0xdc, 12, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
-    { 0xdd, 12, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
-    { 0xde, 12, 64, M(_SC_LEVEL3_CACHE_SIZE),  8388608 },
-    { 0xe2, 16, 64, M(_SC_LEVEL3_CACHE_SIZE),  2097152 },
-    { 0xe3, 16, 64, M(_SC_LEVEL3_CACHE_SIZE),  4194304 },
-    { 0xe4, 16, 64, M(_SC_LEVEL3_CACHE_SIZE),  8388608 },
-    { 0xea, 24, 64, M(_SC_LEVEL3_CACHE_SIZE), 12582912 },
-    { 0xeb, 24, 64, M(_SC_LEVEL3_CACHE_SIZE), 18874368 },
-    { 0xec, 24, 64, M(_SC_LEVEL3_CACHE_SIZE), 25165824 },
-  };
-#define nintel_02_known (sizeof (intel_02_known) / sizeof (intel_02_known[0]))
-
-
-static int
-intel_02_known_compare (const void *p1, const void *p2)
-{
-  const struct intel_02_cache_info *i1;
-  const struct intel_02_cache_info *i2;
-
-  i1 = (const struct intel_02_cache_info *) p1;
-  i2 = (const struct intel_02_cache_info *) p2;
-
-  if (i1->idx == i2->idx)
-    return 0;
-
-  return i1->idx < i2->idx ? -1 : 1;
-}
-
-
-static long int
-__attribute__ ((noinline))
-intel_check_word (int name, unsigned int value, bool *has_level_2,
-		  bool *no_level_2_or_3)
-{
-  if ((value & 0x80000000) != 0)
-    /* The register value is reserved.  */
-    return 0;
-
-  /* Fold the name.  The _SC_ constants are always in the order SIZE,
-     ASSOC, LINESIZE.  */
-  int folded_rel_name = (M(name) / 3) * 3;
-
-  while (value != 0)
-    {
-      unsigned int byte = value & 0xff;
-
-      if (byte == 0x40)
-	{
-	  *no_level_2_or_3 = true;
-
-	  if (folded_rel_name == M(_SC_LEVEL3_CACHE_SIZE))
-	    /* No need to look further.  */
-	    break;
-	}
-      else if (byte == 0xff)
-	{
-	  /* CPUID leaf 0x4 contains all the information.  We need to
-	     iterate over it.  */
-	  unsigned int eax;
-	  unsigned int ebx;
-	  unsigned int ecx;
-	  unsigned int edx;
-
-	  unsigned int round = 0;
-	  while (1)
-	    {
-	      asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-			    : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-			    : "0" (4), "2" (round));
-
-	      enum { null = 0, data = 1, inst = 2, uni = 3 } type = eax & 0x1f;
-	      if (type == null)
-		/* That was the end.  */
-		break;
-
-	      unsigned int level = (eax >> 5) & 0x7;
-
-	      if ((level == 1 && type == data
-		   && folded_rel_name == M(_SC_LEVEL1_DCACHE_SIZE))
-		  || (level == 1 && type == inst
-		      && folded_rel_name == M(_SC_LEVEL1_ICACHE_SIZE))
-		  || (level == 2 && folded_rel_name == M(_SC_LEVEL2_CACHE_SIZE))
-		  || (level == 3 && folded_rel_name == M(_SC_LEVEL3_CACHE_SIZE))
-		  || (level == 4 && folded_rel_name == M(_SC_LEVEL4_CACHE_SIZE)))
-		{
-		  unsigned int offset = M(name) - folded_rel_name;
-
-		  if (offset == 0)
-		    /* Cache size.  */
-		    return (((ebx >> 22) + 1)
-			    * (((ebx >> 12) & 0x3ff) + 1)
-			    * ((ebx & 0xfff) + 1)
-			    * (ecx + 1));
-		  if (offset == 1)
-		    return (ebx >> 22) + 1;
-
-		  assert (offset == 2);
-		  return (ebx & 0xfff) + 1;
-		}
-
-	      ++round;
-	    }
-	  /* There is no other cache information anywhere else.  */
-	  break;
-	}
-      else
-	{
-	  if (byte == 0x49 && folded_rel_name == M(_SC_LEVEL3_CACHE_SIZE))
-	    {
-	      /* Intel reused this value.  For family 15, model 6 it
-		 specifies the 3rd level cache.  Otherwise the 2nd
-		 level cache.  */
-	      unsigned int eax;
-	      unsigned int ebx;
-	      unsigned int ecx;
-	      unsigned int edx;
-	      asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-			    : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-			    : "0" (1));
-
-	      unsigned int family = ((eax >> 20) & 0xff) + ((eax >> 8) & 0xf);
-	      unsigned int model = ((((eax >>16) & 0xf) << 4)
-				    + ((eax >> 4) & 0xf));
-	      if (family == 15 && model == 6)
-		{
-		  /* The level 3 cache is encoded for this model like
-		     the level 2 cache is for other models.  Pretend
-		     the caller asked for the level 2 cache.  */
-		  name = (_SC_LEVEL2_CACHE_SIZE
-			  + (name - _SC_LEVEL3_CACHE_SIZE));
-		  folded_rel_name = M(_SC_LEVEL2_CACHE_SIZE);
-		}
-	    }
-
-	  struct intel_02_cache_info *found;
-	  struct intel_02_cache_info search;
-
-	  search.idx = byte;
-	  found = bsearch (&search, intel_02_known, nintel_02_known,
-			   sizeof (intel_02_known[0]), intel_02_known_compare);
-	  if (found != NULL)
-	    {
-	      if (found->rel_name == folded_rel_name)
-		{
-		  unsigned int offset = M(name) - folded_rel_name;
-
-		  if (offset == 0)
-		    /* Cache size.  */
-		    return found->size;
-		  if (offset == 1)
-		    return found->assoc;
-
-		  assert (offset == 2);
-		  return found->linesize;
-		}
-
-	      if (found->rel_name == M(_SC_LEVEL2_CACHE_SIZE))
-		*has_level_2 = true;
-	    }
-	}
-
-      /* Next byte for the next round.  */
-      value >>= 8;
-    }
-
-  /* Nothing found.  */
-  return 0;
-}
-
-
-static long int  __attribute__ ((noinline))
-handle_intel (int name, unsigned int maxidx)
-{
-  if (maxidx < 2)
-    {
-      // XXX Do such processors exist?  When we know we can fill in some
-      // values.
-      return 0;
-    }
-
-  /* OK, we can use the CPUID instruction to get all info about the
-     caches.  */
-  unsigned int cnt = 0;
-  unsigned int max = 1;
-  long int result = 0;
-  bool no_level_2_or_3 = false;
-  bool has_level_2 = false;
-  while (cnt++ < max)
-    {
-      unsigned int eax;
-      unsigned int ebx;
-      unsigned int ecx;
-      unsigned int edx;
-      asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-		    : "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-		    : "0" (2));
-
-      /* The low byte of EAX in the first round contain the number of
-	 rounds we have to make.  At least one, the one we are already
-	 doing.  */
-      if (cnt == 1)
-	{
-	  max = eax & 0xff;
-	  eax &= 0xffffff00;
-	}
-
-      /* Process the individual registers' value.  */
-      result = intel_check_word (name, eax, &has_level_2, &no_level_2_or_3);
-      if (result != 0)
-	return result;
-
-      result = intel_check_word (name, ebx, &has_level_2, &no_level_2_or_3);
-      if (result != 0)
-	return result;
-
-      result = intel_check_word (name, ecx, &has_level_2, &no_level_2_or_3);
-      if (result != 0)
-	return result;
-
-      result = intel_check_word (name, edx, &has_level_2, &no_level_2_or_3);
-      if (result != 0)
-	return result;
-    }
-
-  if (name >= _SC_LEVEL2_CACHE_SIZE && name <= _SC_LEVEL3_CACHE_LINESIZE
-      && no_level_2_or_3)
-    return -1;
-
-  return 0;
-}
-
-
-static long int __attribute__ ((noinline))
-handle_amd (int name)
-{
-  unsigned int eax;
-  unsigned int ebx;
-  unsigned int ecx;
-  unsigned int edx;
-  asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-		: "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-		: "0" (0x80000000));
-
-  if (name >= _SC_LEVEL3_CACHE_SIZE)
-    return 0;
-
-  unsigned int fn = 0x80000005 + (name >= _SC_LEVEL2_CACHE_SIZE);
-  if (eax < fn)
-    return 0;
-
-  asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-		: "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-		: "0" (fn));
-
-  if (name < _SC_LEVEL1_DCACHE_SIZE)
-    {
-      name += _SC_LEVEL1_DCACHE_SIZE - _SC_LEVEL1_ICACHE_SIZE;
-      ecx = edx;
-    }
-
-  switch (name)
-    {
-    case _SC_LEVEL1_DCACHE_SIZE:
-      return (ecx >> 14) & 0x3fc00;
-    case _SC_LEVEL1_DCACHE_ASSOC:
-      ecx >>= 16;
-      if ((ecx & 0xff) == 0xff)
-	/* Fully associative.  */
-	return (ecx << 2) & 0x3fc00;
-      return ecx & 0xff;
-    case _SC_LEVEL1_DCACHE_LINESIZE:
-      return ecx & 0xff;
-    case _SC_LEVEL2_CACHE_SIZE:
-      return (ecx & 0xf000) == 0 ? 0 : (ecx >> 6) & 0x3fffc00;
-    case _SC_LEVEL2_CACHE_ASSOC:
-      ecx >>= 12;
-      switch (ecx & 0xf)
-	{
-	case 0:
-	case 1:
-	case 2:
-	case 4:
-	  return ecx & 0xf;
-	case 6:
-	  return 8;
-	case 8:
-	  return 16;
-	case 0xf:
-	  return (ecx << 6) & 0x3fffc00;
-	default:
-	  return 0;
-	}
-    case _SC_LEVEL2_CACHE_LINESIZE:
-      return (ecx & 0xf000) == 0 ? 0 : ecx & 0xff;
-    default:
-      assert (! "cannot happen");
-    }
-  return -1;
-}
-
-
-static int
-i386_i486_test (void)
-{
-  int eflags;
-  int ac;
-  asm volatile ("pushfl;\n\t"
-		"popl %0;\n\t"
-		"movl $0x240000, %1;\n\t"
-		"xorl %0, %1;\n\t"
-		"pushl %1;\n\t"
-		"popfl;\n\t"
-		"pushfl;\n\t"
-		"popl %1;\n\t"
-		"xorl %0, %1;\n\t"
-		"pushl %0;\n\t"
-		"popfl"
-		: "=r" (eflags), "=r" (ac));
-
-  return ac;
-}
-
-
-/* Get the value of the system variable NAME.  */
-long int
-__sysconf (int name)
-{
-  /* All the remainder, except the cache information, is handled in
-     the generic code.  */
-  if (name < _SC_LEVEL1_ICACHE_SIZE || name > _SC_LEVEL4_CACHE_LINESIZE)
-    return linux_sysconf (name);
-
-  /* Recognize i386 and compatible.  These don't have any cache on
-     board.  */
-  int ac = i386_i486_test ();
-
-  if (ac == 0)
-    /* This is an i386.  */
-    // XXX Is this true for all brands?
-    return -1;
-
-  /* Detect i486, the last Intel processor without CPUID.  */
-  if ((ac & (1 << 21)) == 0)
-    {
-      /* No CPUID.  */
-      // XXX Fill in info about other brands.  For now only Intel.
-      return handle_i486 (name);
-    }
-
-  /* Find out what brand of processor.  */
-  unsigned int eax;
-  unsigned int ebx;
-  unsigned int ecx;
-  unsigned int edx;
-  asm volatile ("xchgl %%ebx, %1; cpuid; xchgl %%ebx, %1"
-		: "=a" (eax), "=r" (ebx), "=c" (ecx), "=d" (edx)
-		: "0" (0));
-
-  /* This spells out "GenuineIntel".  */
-  if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69)
-    return handle_intel (name, eax);
-
-  /* This spells out "AuthenticAMD".  */
-  if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65)
-    return handle_amd (name);
-
-  // XXX Fill in more vendors.
-
-  /* CPU not known, we have no information.  */
-  return 0;
-}
-
-/* Now the generic Linux version.  */
-#undef __sysconf
-#define __sysconf static linux_sysconf
-#include "../sysconf.c"