[Bug math/17262] mathinline.h refines llrint on gcc-3.2 for x86_64

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https://sourceware.org/bugzilla/show_bug.cgi?id=17262

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=508ce3acd95e0782bc81e1f1eb84c43fa6978cfc

commit 508ce3acd95e0782bc81e1f1eb84c43fa6978cfc
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Wed Aug 13 14:05:15 2014 +0530

    Disable x87 inline functions for x86_64 and SSE [BZ #17262]

    Since:

    commit 409e00bd69b8d8dd74d7327085351d26769ea6fc
    Author: H.J. Lu <hjl.tools@gmail.com>
    Date:   Wed Jan 29 07:51:41 2014 -0800

        Disable x87 inline functions for SSE2 math

        When i386 and x86-64 mathinline.h was merged into a single
mathinline.h,
        "gcc -m32" enables x87 inline functions on x86-64 even when
-mfpmath=sse
        and SSE2 is enabled.  It is a regression on x86-64.  We should check
        __SSE2_MATH__ instead of __x86_64__ when disabling x87 inline
functions.

    gcc-3.2 is unable to correctly compile x86_64 routines for llrint
    since it gets redefined.  This is because gcc 3.2 does not set
    __SSE2_MATH__ for x86_64, thus exposing the duplicate definition.

    The correct fix ought to be to check for both __SSE2_MATH__ and
    __x86_64__ and enable those bits only when neither are defined.

    Tested fix with the reproducer for
    409e00bd69b8d8dd74d7327085351d26769ea6fc as well as with gcc-3.2.

-----------------------------------------------------------------------

Summary of changes:
 ChangeLog                         |    6 ++++++
 NEWS                              |    2 +-
 sysdeps/x86/fpu/bits/mathinline.h |    7 +++++--
 3 files changed, 12 insertions(+), 3 deletions(-)

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