Viewing file:  builtin-bswap-4.c (1.42 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-require-effective-target stdint_types } */
/* { dg-options "-Wall" } */
#include <stdint.h>
#define MAKE_FUN(suffix, type) \
type my_bswap##suffix(type x) { \
type result = 0; \
int shift; \
for (shift = 0; shift < 8 * sizeof (type); shift += 8) \
{ \
result <<= 8; \
result |= (x >> shift) & 0xff; \
} \
return result; \
} \
MAKE_FUN(16, uint16_t);
MAKE_FUN(32, uint32_t);
MAKE_FUN(64, uint64_t);
extern void abort (void);
#define NUMS16 \
{ \
0x0000, \
0x1122, \
0xffff, \
}
#define NUMS32 \
{ \
0x00000000UL, \
0x11223344UL, \
0xffffffffUL, \
}
#define NUMS64 \
{ \
0x0000000000000000ULL, \
0x1122334455667788ULL, \
0xffffffffffffffffULL, \
}
uint16_t uint16_ts[] =
NUMS16;
uint32_t uint32_ts[] =
NUMS32;
uint64_t uint64_ts[] =
NUMS64;
#define N(table) (sizeof (table) / sizeof (table[0]))
int
main (void)
{
int i;
for (i = 0; i < N(uint16_ts); i++)
if (__builtin_bswap16 (uint16_ts[i]) != my_bswap16 (uint16_ts[i]))
abort ();
for (i = 0; i < N(uint32_ts); i++)
if (__builtin_bswap32 (uint32_ts[i]) != my_bswap32 (uint32_ts[i]))
abort ();
for (i = 0; i < N(uint64_ts); i++)
if (__builtin_bswap64 (uint64_ts[i]) != my_bswap64 (uint64_ts[i]))
abort ();
return 0;
}
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