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typedef unsigned int __attribute__ ((mode (QI))) intw1_t;
typedef unsigned int __attribute__ ((mode (HI))) intw2_t;
typedef unsigned int __attribute__ ((mode (SI))) intw4_t;
typedef unsigned int __attribute__ ((mode (DI))) intw8_t;
#define MISALIGN_DEFINE_ONE(align, width, offset) \
static void \
misalign_check_one_ ## align ## width ## offset (void) \
{ \
static union \
{ \
intw1_t v[32]; \
struct __attribute__ ((packed)) \
{ \
intw1_t o[8 + offset]; \
intw ## width ## _t x; \
} x; \
intw ## align ## _t a; \
} \
dst = {{ [0 ... 31] = 0xaa }}; \
static const union \
{ \
intw1_t v[8]; \
intw ## width ## _t x; \
} \
src = {{ 1, 2, 3, 4, 5, 6, 7, 8 }}; \
int i, j; \
\
dst.x.x = src.x; \
asm ("" : : : "memory"); \
for (i = 0; i < 8 + offset; i++) \
if (dst.v[i] != 0xaa) \
__builtin_abort (); \
for (j = 0; i < 8 + offset + width; i++, j++) \
if (dst.v[i] != src.v[j]) \
__builtin_abort (); \
for (; i < sizeof (dst.v); i++) \
if (dst.v[i] != 0xaa) \
__builtin_abort (); \
}
#define MISALIGN_DEFINE_ONE_ALIGN_WIDTH(align, width) \
MISALIGN_DEFINE_ONE (align, width, 1) \
MISALIGN_DEFINE_ONE (align, width, 2) \
MISALIGN_DEFINE_ONE (align, width, 3) \
MISALIGN_DEFINE_ONE (align, width, 4) \
MISALIGN_DEFINE_ONE (align, width, 5) \
MISALIGN_DEFINE_ONE (align, width, 6) \
MISALIGN_DEFINE_ONE (align, width, 7)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (1, 2)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (1, 4)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (1, 8)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (2, 4)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (2, 8)
MISALIGN_DEFINE_ONE_ALIGN_WIDTH (4, 8)
#define MISALIGN_CHECK_ONE(align, width, offset) \
misalign_check_one_ ## align ## width ## offset ();
#define MISALIGN_CHECK_ONE_ALIGN_WIDTH(align, width) \
do \
{ \
MISALIGN_CHECK_ONE (align, width, 1); \
MISALIGN_CHECK_ONE (align, width, 2); \
MISALIGN_CHECK_ONE (align, width, 3); \
MISALIGN_CHECK_ONE (align, width, 4); \
MISALIGN_CHECK_ONE (align, width, 5); \
MISALIGN_CHECK_ONE (align, width, 6); \
MISALIGN_CHECK_ONE (align, width, 7); \
} \
while (0);
int
main (void)
{
MISALIGN_CHECK_ONE_ALIGN_WIDTH (1, 2);
MISALIGN_CHECK_ONE_ALIGN_WIDTH (1, 4);
MISALIGN_CHECK_ONE_ALIGN_WIDTH (1, 8);
MISALIGN_CHECK_ONE_ALIGN_WIDTH (2, 4);
MISALIGN_CHECK_ONE_ALIGN_WIDTH (2, 8);
MISALIGN_CHECK_ONE_ALIGN_WIDTH (4, 8);
return 0;
}
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