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47 lines
1.9 KiB
C
47 lines
1.9 KiB
C
/* Copyright (C) 2003-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <stdio.h>
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#include <stdint.h>
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#define TEST_STACK_ALIGN() \
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({ \
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/* AMD64 ABI mandates 16byte aligned stack. \
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Unfortunately, current GCC doesn't support __int128 or __float128 \
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types, so use aligned attribute instead. */ \
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struct _S \
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{ \
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int _i __attribute__((aligned (16))); \
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int _pad[3]; \
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} _s = { ._i = 18 }; \
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double _d = 12.0; \
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long double _ld = 15.0; \
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int _ret = 0; \
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printf ("__int128: %d %p %zu\n", _s._i, &_s, __alignof (_s)); \
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if ((((uintptr_t) &_s) & (__alignof (_s) - 1)) != 0) \
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_ret = 1; \
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\
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printf ("double: %g %p %zu\n", _d, &_d, __alignof (double)); \
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if ((((uintptr_t) &_d) & (__alignof (double) - 1)) != 0) \
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_ret = 1; \
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\
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printf ("ldouble: %Lg %p %zu\n", _ld, &_ld, __alignof (long double)); \
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if ((((uintptr_t) &_ld) & (__alignof (long double) - 1)) != 0) \
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_ret = 1; \
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_ret; \
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})
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