glibc/ports/sysdeps/powerpc/dl-procinfo.h

/* Processor capability information handling macros.  PowerPC version.
   Copyright (C) 2005, 2006, 2008 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 <sysdep.h>            /* This defines the PPC_FEATURE_* macros.  */

/* There are 25 bits used, but they are bits 7..31.  */
#define _DL_HWCAP_FIRST                7
#define _DL_HWCAP_COUNT                32

/* These bits influence library search.  */
#define HWCAP_IMPORTANT                (PPC_FEATURE_HAS_ALTIVEC \
                               + PPC_FEATURE_HAS_DFP)

#define _DL_PLATFORMS_COUNT    12

#define _DL_FIRST_PLATFORM     32
/* Mask to filter out platforms.  */
#define _DL_HWCAP_PLATFORM      (((1ULL << _DL_PLATFORMS_COUNT) - 1) \
                               << _DL_FIRST_PLATFORM)

/* Platform bits (relative to _DL_FIRST_PLATFORM).  */
#define PPC_PLATFORM_POWER4          0
#define PPC_PLATFORM_PPC970          1
#define PPC_PLATFORM_POWER5          2
#define PPC_PLATFORM_POWER5_PLUS      3
#define PPC_PLATFORM_POWER6          4
#define PPC_PLATFORM_CELL_BE         5
#define PPC_PLATFORM_POWER6X         6
#define PPC_PLATFORM_POWER7          7
#define PPC_PLATFORM_PPC405          8
#define PPC_PLATFORM_PPC440          9
#define PPC_PLATFORM_PPC464          10
#define PPC_PLATFORM_PPC476          11

static inline const char *
__attribute__ ((unused))
_dl_hwcap_string (int idx)
{
  return GLRO(dl_powerpc_cap_flags)[idx - _DL_HWCAP_FIRST];
}

static inline const char *
__attribute__ ((unused))
_dl_platform_string (int idx)
{
  return GLRO(dl_powerpc_platforms)[idx - _DL_FIRST_PLATFORM];
}

static inline int
__attribute__ ((unused))
_dl_string_hwcap (const char *str)
{
  for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
    if (strcmp (str, _dl_hwcap_string (i)) == 0)
      return i;
  return -1;
}

static inline int
__attribute__ ((unused, always_inline))
_dl_string_platform (const char *str)
{
  if (str == NULL)
    return -1;

  if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_POWER4], 5) == 0)
    {
      int ret;
      str += 5;
      switch (*str)
       {
       case '4':
         ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER4;
         break;
       case '5':
         ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5;
         if (str[1] == '+')
           {
             ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER5_PLUS;
             ++str;
           }
         break;
       case '6':
         ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6;
         if (str[1] == 'x')
           {
             ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER6X;
             ++str;
           }
         break;
       case '7':
         ret = _DL_FIRST_PLATFORM + PPC_PLATFORM_POWER7;
         break;
       default:
         return -1;
       }
      if (str[1] == '\0')
       return ret;
    }
  else if (strncmp (str, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970],
                   3) == 0)
    {
      if (strcmp (str + 3, GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC970]
                          + 3) == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC970;
      else if (strcmp (str + 3,
                      GLRO(dl_powerpc_platforms)[PPC_PLATFORM_CELL_BE] + 3)
              == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_CELL_BE;
      else if (strcmp (str + 3,
                      GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC405] + 3)
              == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC405;
      else if (strcmp (str + 3,
                      GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC440] + 3)
              == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC440;
      else if (strcmp (str + 3,
                      GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC464] + 3)
              == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC464;
      else if (strcmp (str + 3,
                      GLRO(dl_powerpc_platforms)[PPC_PLATFORM_PPC476] + 3)
              == 0)
       return _DL_FIRST_PLATFORM + PPC_PLATFORM_PPC476;
    }

  return -1;
}

#ifdef IS_IN_rtld
static inline int
__attribute__ ((unused))
_dl_procinfo (int word)
{
  _dl_printf ("AT_HWCAP:       ");

  for (int i = _DL_HWCAP_FIRST; i < _DL_HWCAP_COUNT; ++i)
    if (word & (1 << i))
      _dl_printf (" %s", _dl_hwcap_string (i));

  _dl_printf ("\n");

  return 0;
}
#endif

#endif /* dl-procinfo.h */