sysdeps/powerpc/tst-stack-align.h

   1 /* Check stack alignment.  PowerPC version.
   2    Copyright (C) 2005-2023 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 #define TEST_STACK_ALIGN_INIT() \
  20   ({                                                                         \
  21     /* Altivec __vector int etc. needs 16byte aligned stack.                 \
  22        Instead of using altivec.h here, use aligned attribute instead.  */   \
  23     struct _S                                                                \
  24       {                                                                      \
  25         int _i __attribute__((aligned (16)));                                \
  26         int _j[3];                                                           \
  27       } _s = { ._i = 18, ._j[0] = 19, ._j[1] = 20, ._j[2] = 21 };            \
  28     printf ("__vector int:  { %d, %d, %d, %d } %p %zu\n", _s._i, _s._j[0],   \
  29             _s._j[1], _s._j[2], &_s, __alignof (_s));                        \
  30     is_aligned (&_s, __alignof (_s));                                        \
  31    })
  32
  33 #include_next <tst-stack-align.h>