This is the mail archive of the
gcc-patches@gcc.gnu.org
mailing list for the GCC project.
Re: denormal patch
> Date: Wed, 22 Mar 2000 14:37:06 -0800
> From: Richard Henderson <rth@cygnus.com>
> Cc: gcc-patches@gcc.gnu.org
>
> On Mon, Mar 20, 2000 at 06:10:59PM -0800, Geoff Keating wrote:
> > + * config/fp-bit.c (pack_d): Correct the case when a denormal
> > + is rounded up and stops being denormal.
>
> Ok.
OK, committed.
> Would you choose the type for ul and ull based on limits.h and
> the expected size of the fp types? Then verify in main that
> the types do in fact match up in size and exit early if you
> guessed wrong.
How about this? It seems to work on ppc, ppc/-msoft-float, and alpha/-mieee.
--
- Geoffrey Keating <geoffk@cygnus.com>
===File gcc/testsuite/gcc.c-torture/execute/ieee/20000320-1.c===
typedef unsigned ull __attribute__((mode(DI)));
typedef unsigned ul __attribute__((mode(SI)));
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);
}
============================================================