[Bug math/16171] drem should be alias of remainder

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https://sourceware.org/bugzilla/show_bug.cgi?id=16171

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https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=5ce8f125063cfd8660710a80243cb705e66f0626

commit 5ce8f125063cfd8660710a80243cb705e66f0626
Author: Joseph Myers <joseph@codesourcery.com>
Date:   Thu Oct 29 22:29:21 2015 +0000

    Make drem an alias of remainder (bug 16171).

    The libm drem functions just call the corresponding __remainder
    functions.  This patch removes the unnecessary wrappers by making them
    into weak aliases at the ELF level.

    Tested for x86_64, x86, mips64 and powerpc.

        [BZ #16171]
        * math/w_remainder.c (drem): Define as weak alias of __remainder.
        [NO_LONG_DOUBLE] (dreml): Define as weak alias of __remainder.
        * math/w_remainderf.c (dremf): Define as weak alias of
        __remainderf.
        * math/w_remainderl.c (dreml): Define as weak alias of
        __remainderl.
        * sysdeps/ia64/fpu/e_remainder.S (drem): Define as weak alias of
        __remainder.
        * sysdeps/ia64/fpu/e_remainderf.S (dremf): Define as weak alias of
        __remainderf.
        * sysdeps/ia64/fpu/e_remainderl.S (dreml): Define as weak alias of
        __remainderl.
        * sysdeps/ieee754/ldbl-opt/nldbl-remainder.c (dreml): Define as
        weak alias of remainderl.
        * sysdeps/ieee754/ldbl-opt/w_remainder.c
        [LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)] (__drem): Define as strong
        alias of __remainder.
        [LONG_DOUBLE_COMPAT(libm, GLIBC_2_0)] (dreml): Use compat_symbol.
        * sysdeps/ieee754/ldbl-opt/w_remainderl.c (__dreml): Define as
        strong alias of __remainderl.
        (dreml): Use long_double_symbol.
        * math/Makefile (libm-calls): Remove w_drem.
        * sysdeps/ieee754/ldbl-opt/Makefile (libnldbl-calls): Remove drem.
        (CFLAGS-nldbl-drem.c): Remove variable.
        (CFLAGS-nldbl-remainder.c): Add -fno-builtin-dreml.
        * math/w_drem.c: Remove file.
        * math/w_dremf.c: Likewise.
        * math/w_dreml.c: Likewise.
        * sysdeps/ieee754/ldbl-opt/nldbl-drem.c: Likewise.
        * sysdeps/ieee754/ldbl-opt/w_drem.c: Likewise.
        * sysdeps/ieee754/ldbl-opt/w_dreml.c: Likewise.

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

Summary of changes:
 ChangeLog                                  |   33 ++++++++++++++++++++++++++++
 NEWS                                       |   24 ++++++++++----------
 math/Makefile                              |    2 +-
 math/w_drem.c                              |   19 ----------------
 math/w_dremf.c                             |   16 -------------
 math/w_dreml.c                             |   17 --------------
 math/w_remainder.c                         |    2 +
 math/w_remainderf.c                        |    1 +
 math/w_remainderl.c                        |    1 +
 sysdeps/ia64/fpu/e_remainder.S             |    1 +
 sysdeps/ia64/fpu/e_remainderf.S            |    1 +
 sysdeps/ia64/fpu/e_remainderl.S            |    1 +
 sysdeps/ieee754/ldbl-opt/Makefile          |    5 +--
 sysdeps/ieee754/ldbl-opt/nldbl-drem.c      |    8 ------
 sysdeps/ieee754/ldbl-opt/nldbl-remainder.c |    2 +
 sysdeps/ieee754/ldbl-opt/w_drem.c          |    5 ----
 sysdeps/ieee754/ldbl-opt/w_dreml.c         |    5 ----
 sysdeps/ieee754/ldbl-opt/w_remainder.c     |    2 +
 sysdeps/ieee754/ldbl-opt/w_remainderl.c    |    2 +
 19 files changed, 61 insertions(+), 86 deletions(-)
 delete mode 100644 math/w_drem.c
 delete mode 100644 math/w_dremf.c
 delete mode 100644 math/w_dreml.c
 delete mode 100644 sysdeps/ieee754/ldbl-opt/nldbl-drem.c
 delete mode 100644 sysdeps/ieee754/ldbl-opt/w_drem.c
 delete mode 100644 sysdeps/ieee754/ldbl-opt/w_dreml.c

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