diff options
Diffstat (limited to 'sysdeps/x86_64/tst-stack-align.h')
| -rw-r--r-- | sysdeps/x86_64/tst-stack-align.h | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/sysdeps/x86_64/tst-stack-align.h b/sysdeps/x86_64/tst-stack-align.h new file mode 100644 index 0000000000..a89f092c5c --- /dev/null +++ b/sysdeps/x86_64/tst-stack-align.h @@ -0,0 +1,47 @@ +/* Copyright (C) 2003 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <stdio.h> +#include <stdint.h> + +#define TEST_STACK_ALIGN() \ + ({ \ + /* AMD64 ABI mandates 16byte aligned stack. \ + Unfortunately, current GCC doesn't support __int128 or __float128 \ + types, so use aligned attribute instead. */ \ + struct _S \ + { \ + int _i __attribute__((aligned (16))); \ + int _pad[3]; \ + } _s = { ._i = 18 }; \ + double _d = 12.0; \ + long double _ld = 15.0; \ + int _ret = 0; \ + printf ("__int128: %d %p %zu\n", _s._i, &_s, __alignof (_s)); \ + if ((((uintptr_t) &_s) & (__alignof (_s) - 1)) != 0) \ + _ret = 1; \ + \ + printf ("double: %g %p %zu\n", _d, &_d, __alignof (double)); \ + if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0) \ + _ret = 1; \ + \ + printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, __alignof (long double)); \ + if ((((uintptr_t) &_ld) & (__alignof (long double) - 1)) != 0) \ + _ret = 1; \ + _ret; \ + }) |