/* Architecture-specific glibc-hwcaps subdirectories.  s390x version.
   Copyright (C) 2020-2022 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
   <https://www.gnu.org/licenses/>.  */

#include <dl-hwcaps.h>
#include <ldsodefs.h>

const char _dl_hwcaps_subdirs[] = "z16:z15:z14:z13";
enum { subdirs_count = 4 }; /* Number of components in _dl_hwcaps_subdirs.  */

uint32_t
_dl_hwcaps_subdirs_active (void)
{
  int active = 0;

  /* Test in reverse preference order.  */

  /* z13.  */
  if (!(GLRO (dl_hwcap) & HWCAP_S390_VX))
    return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  ++active;

  /* z14.  */
  if (!((GLRO (dl_hwcap) & HWCAP_S390_VXD)
        && (GLRO (dl_hwcap) & HWCAP_S390_VXE)
        && (GLRO (dl_hwcap) & HWCAP_S390_GS)))
    return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  ++active;

  /* z15.
     Note: We do not list HWCAP_S390_SORT and HWCAP_S390_DFLT here as,
     according to the Principles of Operation, those may be replaced or removed
     in future.  */
  if (!((GLRO (dl_hwcap) & HWCAP_S390_VXRS_EXT2)
        && (GLRO (dl_hwcap) & HWCAP_S390_VXRS_PDE)))
    return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  ++active;

  /* z16.
   Note: We do not list HWCAP_S390_NNPA here as, according to the Principles of
   Operation, those instructions may be replaced or removed in future.  */
  if (!(GLRO (dl_hwcap) & HWCAP_S390_VXRS_PDE2))
    return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  ++active;

  return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
}