sysdeps/powerpc/powerpc64/le/dl-hwcaps-subdirs.c

   1 /* Architecture-specific glibc-hwcaps subdirectories.  powerpc64le version.
   2    Copyright (C) 2020-2023 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <dl-hwcaps.h>
  20 #include <ldsodefs.h>
  21
  22 const char _dl_hwcaps_subdirs[] = "power10:power9";
  23 enum { subdirs_count = 2 }; /* Number of components in _dl_hwcaps_subdirs.  */
  24
  25 uint32_t
  26 _dl_hwcaps_subdirs_active (void)
  27 {
  28   int active = 0;
  29
  30   /* Test in reverse preference order.  Altivec and VSX are implied by
  31      the powerpc64le ABI definition.  */
  32
  33   /* POWER9.  GCC enables float128 hardware support for -mcpu=power9.  */
  34   if ((GLRO (dl_hwcap2) & PPC_FEATURE2_ARCH_3_00) == 0
  35       || (GLRO (dl_hwcap2) & PPC_FEATURE2_HAS_IEEE128) == 0)
  36     return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  37   ++active;
  38
  39   /* POWER10.  GCC defines __MMA__ for -mcpu=power10.  */
  40   if ((GLRO (dl_hwcap2) & PPC_FEATURE2_ARCH_3_1) == 0
  41       || (GLRO (dl_hwcap2) & PPC_FEATURE2_MMA) == 0)
  42     return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  43   ++active;
  44
  45   return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
  46 }