[Bug math/19079] dbl-64/wordsize-64 lround based on llround incorrect for ILP32

["cvs-commit at gcc dot gnu.org" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19079

--- Comment #1 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot gnu.org> ---
This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "GNU C Library master sources".

The branch, master has been updated
       via  b75bc69cdfe5247b2156ce249518f1c1df4d797d (commit)
      from  a68dec3b03b9c163ad79192cbe837208b2f90de1 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=b75bc69cdfe5247b2156ce249518f1c1df4d797d

commit b75bc69cdfe5247b2156ce249518f1c1df4d797d
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Wed Oct 7 00:40:12 2015 +0000

    Don't use dbl-64/wordsize-64 lround based on llround for ILP32 (bug 19079).

    The implementation of lround in dbl-64/wordsize-64 as an alias or
    wrapper for llround is always incorrect when long is not 64-bit,
    because it misses required exceptions in overflow cases, as shown by
    my recently added tests.  This patch removes that alias / wrapper in
    the non-LP64 case, together with the REGISTER_CAST_INT32_TO_INT64
    macro, restoring the previous version of lround for dbl-64/wordsize-64
    (newly conditioned on !_LP64).

    Tested for x86_64, and for mips64 with use of dbl-64/wordsize-64
    enabled.

        [BZ #19079]
        * sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c: Restore previous
        file, conditioned on [!_LP64].
        * sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c
        [!_LP64] (__lround): Do not define as function or alias.
        [!_LP64] (lround): Likewise.
        [!_LP64] (__lroundl): Likewise.
        [!_LP64] (lroundl): Likewise.
        * sysdeps/tile/sysdep.h (REGISTER_CAST_INT32_TO_INT64): Remove
        macro.
        * sysdeps/x86_64/x32/sysdep.h (REGISTER_CAST_INT32_TO_INT64):
        Likewise.

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

Summary of changes:
 ChangeLog                                      |   15 +++++
 NEWS                                           |    2 +-
 sysdeps/ieee754/dbl-64/wordsize-64/s_llround.c |   17 +-----
 sysdeps/ieee754/dbl-64/wordsize-64/s_lround.c  |   70 +++++++++++++++++++++++-
 sysdeps/tile/sysdep.h                          |    4 --
 sysdeps/x86_64/x32/sysdep.h                    |    4 --
 6 files changed, 87 insertions(+), 25 deletions(-)

-- 
You are receiving this mail because:
You are on the CC list for the bug.