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re PR target/25960 (__gcc_qadd doesn't handle -0.0L properly)

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PR target/25960
gcc/
	* config/rs6000/darwin-ldouble.c (__gcc_qadd): Preserve -0.0 result.
gcc/testsuite/
	* gcc.target/powerpc/pr25960.c: New test.

From-SVN: r110540
This commit is contained in:
Alan Modra 2006-02-03 11:44:08 +00:00 • committed by Alan Modra
parent f61a2c7da8
commit 4a6c754b7a
4 changed files with 32 additions and 1 deletions
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6
gcc/ChangeLog
View file

@ -1,3 +1,8 @@
2006-02-03 Alan Modra <amodra@bigpond.net.au>
PR target/25960
* config/rs6000/darwin-ldouble.c (__gcc_qadd): Preserve -0.0 result.
2006-02-03 Andreas Krebbel <krebbel1@de.ibm.com>
Ulrich Weigand <uweigand@de.ibm.com>
@ -1544,6 +1549,7 @@
2006-01-20 Alan Modra <amodra@bigpond.net.au>
PR target/25668
* libgcc2.c (__floatdisf, __floatdidf): Don't use IBM Extended
Double TFmode.
(__floatundisf, __floatundidf): Likewise.

6
gcc/config/rs6000/darwin-ldouble.c
View file

@ -117,8 +117,12 @@ __gcc_qadd (double a, double aa, double c, double cc)
{
q = a - z;
zz = q + c + (a - (q + z)) + aa + cc;
xh = z + zz;
/* Keep -0 result. */
if (zz == 0.0)
return z;
xh = z + zz;
if (nonfinite (xh))
return xh;

4
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,7 @@
2006-02-03 Alan Modra <amodra@bigpond.net.au>
* gcc.target/powerpc/pr25960.c: New test.
2006-02-02 Steven G. Kargl <kargls@comcast>
PR fortran/24958

17
gcc/testsuite/gcc.target/powerpc/pr25960.c Normal file
View file

@ -0,0 +1,17 @@
/* { dg-do run { target { powerpc*-*-darwin* powerpc*-*-aix* rs6000-*-* powerpc*-*-linux* } } } */
/* { dg-options "-O2 -mlong-double-128" } */
extern void abort (void);
volatile long double l, m, n;
int
main (void)
{
l = __builtin_copysignl (0.0L, -1.0L);
m = __builtin_copysignl (0.0L, -1.0L);
n = l + m;
if (__builtin_copysignl (1.0L, n) >= 0.0L)
abort ();
return 0;
}