Viewing file:  builtin-bswap-11.c (1.1 KB) -rw-r--r--
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/* { dg-do run } */
/* { dg-require-effective-target int128 } */
/* { 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(128, __uint128_t);
extern void abort (void);
typedef union
{
struct { uint64_t lo; uint64_t hi; } s;
__uint128_t n;
} u;
#define NUMS128 \
{ \
{ .s = { 0x0000000000000000ULL, 0x1122334455667788ULL } }, \
{ .s = { 0x1122334455667788ULL, 0xffffffffffffffffULL } }, \
{ .s = { 0xffffffffffffffffULL, 0x0000000000000000ULL } } \
}
u uint128_ts[] = NUMS128;
#define N(table) (sizeof (table) / sizeof (table[0]))
int
main (void)
{
int i;
for (i = 0; i < N(uint128_ts); i++)
if (__builtin_bswap128 (uint128_ts[i].n) != my_bswap128 (uint128_ts[i].n))
abort ();
return 0;
}
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