denormal patch
Geoff Keating
geoffk@cygnus.com
Wed Mar 22 16:14:00 GMT 2000
> Date: Wed, 22 Mar 2000 15:58:34 -0800
> From: Richard Henderson <rth@cygnus.com>
> Cc: gcc-patches@gcc.gnu.org
>
> On Wed, Mar 22, 2000 at 03:41:50PM -0800, Geoff Keating wrote:
> > I don't know. I'd like to use <stdint.h> here, but GCC doesn't supply
> > it. Any suggestions?
>
> INT_MAX?
Aah, I see! I'd forgotten that I'd fixed cpp so that it did
computations with 'long long'. How about this?
--
- Geoffrey Keating <geoffk@cygnus.com>
===File gcc/testsuite/gcc.c-torture/execute/ieee/20000320-1.c===
#include <limits.h>
#if UINT_MAX != 4294967295u || (ULONG_LONG_MAX != 18446744073709551615ull && ULONG_MAX != 18446744073709551615ull)
int main(void) { exit (0); }
#else
#if ULONG_MAX == 18446744073709551615ull
typedef unsigned long long ull;
#else
typedef unsigned long ull;
#endif
typedef unsigned ul;
union fl {
float f;
ul l;
} uf;
union dl {
double d;
ull ll;
} ud;
int failed = 0;
void c(ull d, ul f)
{
ud.ll = d;
uf.f = (float) ud.d;
if (uf.l != f)
{
failed++;
}
}
int main()
{
if (sizeof (float) != sizeof (ul)
|| sizeof (double) != sizeof (ull))
exit (0);
c(0x3690000000000000ULL, 0x00000000U);
c(0x3690000000000001ULL, 0x00000001U);
c(0x369fffffffffffffULL, 0x00000001U);
c(0x36A0000000000000ULL, 0x00000001U);
c(0x36A7ffffffffffffULL, 0x00000001U);
c(0x36A8000000000000ULL, 0x00000002U);
c(0x36AfffffffffffffULL, 0x00000002U);
c(0x36b0000000000000ULL, 0x00000002U);
c(0x36b0000000000001ULL, 0x00000002U);
c(0x380fffffdfffffffULL, 0x007fffffU);
c(0x380fffffe0000000ULL, 0x00800000U);
c(0x380fffffe0000001ULL, 0x00800000U);
c(0x380fffffffffffffULL, 0x00800000U);
c(0x3810000000000000ULL, 0x00800000U);
c(0x3810000000000001ULL, 0x00800000U);
c(0x3810000010000000ULL, 0x00800000U);
c(0x3810000010000001ULL, 0x00800001U);
c(0x381000002fffffffULL, 0x00800001U);
c(0x3810000030000000ULL, 0x00800002U);
c(0x3810000050000000ULL, 0x00800002U);
c(0x3810000050000001ULL, 0x00800003U);
if (failed)
abort ();
else
exit (0);
}
#endif
============================================================
More information about the Gcc-patches
mailing list