[Bug target/71806] PowerPC -mcpu=power9 enables __float128 without an explicit -mfloat128

[meissner at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71806

--- Comment #2 from Michael Meissner <meissner at gcc dot gnu.org> ---
Author: meissner
Date: Fri Jul  8 14:49:37 2016
New Revision: 238164

URL: https://gcc.gnu.org/viewcvs?rev=238164&root=gcc&view=rev
Log:
[gcc]
2016-07-08  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/71806
        * config/rs6000/rs6000-cpus.def (ISA_3_0_MASKS_SERVER): Do not
        enable -mfloat128-hardware by default.
        (ISA_3_0_MASKS_IEEE): New macro to give all of the VSX options
        that IEEE 128-bit hardware support needs.
        * config/rs6000/rs6000.c (rs6000_option_override_internal): If
        -mcpu=power9 -mfloat128, enable -mfloat128-hardware by default.
        Use ISA_3_0_MASKS_IEEE as the set of options that IEEE 128-bit
        floating point requires.
        * doc/invoke.texi (RS/6000 and PowerPC Options): Document
        -mfloat128 and -mfloat128-hardware changes.

[gcc/testsuite]
2016-07-08  Michael Meissner  <meiss...@linux.vnet.ibm.com>

        PR target/71806
        * gcc.target/powerpc/p9-lxvx-stxvx-3.c: Add -mfloat128 option.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/rs6000/rs6000-cpus.def
    trunk/gcc/config/rs6000/rs6000.c
    trunk/gcc/doc/invoke.texi
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.target/powerpc/p9-lxvx-stxvx-3.c