extern void abort();
|
extern void abort();
|
|
|
#define HOST_WIDE_INT long
|
#define HOST_WIDE_INT long
|
#define HOST_BITS_PER_WIDE_INT (sizeof(long)*8)
|
#define HOST_BITS_PER_WIDE_INT (sizeof(long)*8)
|
|
|
struct tree_type
|
struct tree_type
|
{
|
{
|
unsigned int precision : 9;
|
unsigned int precision : 9;
|
};
|
};
|
|
|
int
|
int
|
sign_bit_p (struct tree_type *t, HOST_WIDE_INT val_hi, unsigned HOST_WIDE_INT val_lo)
|
sign_bit_p (struct tree_type *t, HOST_WIDE_INT val_hi, unsigned HOST_WIDE_INT val_lo)
|
{
|
{
|
unsigned HOST_WIDE_INT mask_lo, lo;
|
unsigned HOST_WIDE_INT mask_lo, lo;
|
HOST_WIDE_INT mask_hi, hi;
|
HOST_WIDE_INT mask_hi, hi;
|
int width = t->precision;
|
int width = t->precision;
|
|
|
if (width > HOST_BITS_PER_WIDE_INT)
|
if (width > HOST_BITS_PER_WIDE_INT)
|
{
|
{
|
hi = (unsigned HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT - 1);
|
hi = (unsigned HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT - 1);
|
lo = 0;
|
lo = 0;
|
|
|
mask_hi = ((unsigned HOST_WIDE_INT) -1
|
mask_hi = ((unsigned HOST_WIDE_INT) -1
|
>> (2 * HOST_BITS_PER_WIDE_INT - width));
|
>> (2 * HOST_BITS_PER_WIDE_INT - width));
|
mask_lo = -1;
|
mask_lo = -1;
|
}
|
}
|
else
|
else
|
{
|
{
|
hi = 0;
|
hi = 0;
|
lo = (unsigned HOST_WIDE_INT) 1 << (width - 1);
|
lo = (unsigned HOST_WIDE_INT) 1 << (width - 1);
|
|
|
mask_hi = 0;
|
mask_hi = 0;
|
mask_lo = ((unsigned HOST_WIDE_INT) -1
|
mask_lo = ((unsigned HOST_WIDE_INT) -1
|
>> (HOST_BITS_PER_WIDE_INT - width));
|
>> (HOST_BITS_PER_WIDE_INT - width));
|
}
|
}
|
|
|
if ((val_hi & mask_hi) == hi
|
if ((val_hi & mask_hi) == hi
|
&& (val_lo & mask_lo) == lo)
|
&& (val_lo & mask_lo) == lo)
|
return 1;
|
return 1;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
int main()
|
int main()
|
{
|
{
|
struct tree_type t;
|
struct tree_type t;
|
t.precision = 1;
|
t.precision = 1;
|
if (!sign_bit_p (&t, 0, -1))
|
if (!sign_bit_p (&t, 0, -1))
|
abort ();
|
abort ();
|
return 0;
|
return 0;
|
}
|
}
|
|
|
