[Bug target/70117] ppc long double isinf() is wrong?

[amodra at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70117

--- Comment #17 from Alan Modra <amodra at gcc dot gnu.org> ---
Author: amodra
Date: Fri Apr  8 02:11:52 2016
New Revision: 234821

URL: https://gcc.gnu.org/viewcvs?rev=234821&root=gcc&view=rev
Log:
PR70117, ppc long double isinf

gcc/
        PR target/70117
        * builtins.c (fold_builtin_classify): For IBM extended precision,
        look at just the high-order double to test for NaN.
        (fold_builtin_interclass_mathfn): Similarly for Inf.  For isnormal
        test just the high double for Inf but both doubles for subnormal
        limit.
gcc/testsuite/
        * gcc.target/powerpc/pr70117.c: New.

Added:
    trunk/gcc/testsuite/gcc.target/powerpc/pr70117.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/builtins.c
    trunk/gcc/testsuite/ChangeLog