Viewing file:  float128-nan.c (1.89 KB) -rw-r--r--
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/* Test __float128 NaN generation. */
/* { dg-do run } */
/* { dg-require-effective-target fenv_exceptions } */
/* { dg-require-effective-target __float128 } */
/* { dg-require-effective-target base_quadfloat_support } */
/* { dg-options "" } */
/* { dg-add-options __float128 } */
#include <fenv.h>
#include <stdbool.h>
#include <stdint.h>
typedef union
{
__float128 value;
struct
#ifdef __MINGW32__
/* Make sure we are using gnu-style bitfield handling. */
__attribute__ ((gcc_struct))
#endif
{
#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
unsigned negative:1;
unsigned exponent:15;
unsigned quiet_nan:1;
uint64_t mant_high:47;
uint64_t mant_low:64;
#else
uint64_t mant_low:64;
uint64_t mant_high:47;
unsigned quiet_nan:1;
unsigned exponent:15;
unsigned negative:1;
#endif
} nan;
} ieee854_float128;
bool
__attribute__((noinline, noclone))
check_nan (__float128 val, bool quiet)
{
ieee854_float128 u;
volatile __float128 tmp;
u.value = val;
if (u.nan.exponent != 0x7fff
|| (u.nan.quiet_nan | u.nan.mant_high | u.nan.mant_low) == 0
|| u.nan.quiet_nan != quiet)
return false;
if (!__builtin_isnan (u.value))
return false;
feclearexcept (FE_INVALID);
tmp = u.value + u.value;
if ((fetestexcept (FE_INVALID) != 0) == quiet)
return false;
return true;
}
int
main (void)
{
__float128 nan;
nan = __builtin_nanq ("");
if (!check_nan (nan, true))
__builtin_abort ();
nan = __builtin_nanq ("0x0");
if (!check_nan (nan, true))
__builtin_abort ();
nan = __builtin_nanq ("0x1");
if (!check_nan (nan, true))
__builtin_abort ();
nan = __builtin_nansq ("");
if (!check_nan (nan, false))
__builtin_abort ();
nan = __builtin_nansq ("0x0");
if (!check_nan (nan, false))
__builtin_abort ();
nan = __builtin_nansq ("0x1");
if (!check_nan (nan, false))
__builtin_abort ();
return 0;
}
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