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glibc  2.9
tst-stack-align.h
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00001 /* Copyright (C) 2004 Free Software Foundation, Inc.
00002    This file is part of the GNU C Library.
00003 
00004    The GNU C Library is free software; you can redistribute it and/or
00005    modify it under the terms of the GNU Lesser General Public
00006    License as published by the Free Software Foundation; either
00007    version 2.1 of the License, or (at your option) any later version.
00008 
00009    The GNU C Library is distributed in the hope that it will be useful,
00010    but WITHOUT ANY WARRANTY; without even the implied warranty of
00011    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00012    Lesser General Public License for more details.
00013 
00014    You should have received a copy of the GNU Lesser General Public
00015    License along with the GNU C Library; if not, write to the Free
00016    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00017    02111-1307 USA.  */
00018 
00019 #include <stdio.h>
00020 #include <stdint.h>
00021 
00022 typedef struct { int i[4]; } int_al16 __attribute__((aligned (16)));
00023 
00024 #define TEST_STACK_ALIGN() \
00025   ({                                                                \
00026     int_al16 _m;                                                    \
00027     double _d = 12.0;                                                      \
00028     long double _ld = 15.0;                                         \
00029     int _ret = 0;                                                   \
00030     printf ("int_al16:  %p %zu\n", &_m, __alignof (int_al16));             \
00031     if ((((uintptr_t) &_m) & (__alignof (int_al16) - 1)) != 0)             \
00032       _ret = 1;                                                            \
00033                                                                     \
00034     printf ("double:  %g %p %zu\n", _d, &_d, __alignof (double));          \
00035     if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0)               \
00036       _ret = 1;                                                            \
00037                                                                     \
00038     printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, __alignof (long double));    \
00039     if ((((uintptr_t) &_ld) & (__alignof (long double) - 1)) != 0)         \
00040       _ret = 1;                                                            \
00041     _ret;                                                           \
00042     })