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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/114907] __trunchfbf2 should be renamed to
 __extendhfbf2
Date: Thu, 09 May 2024 04:26:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114907

--- Comment #12 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:cad27df08915ead8db3c7d512cfcc1866e7ece69

commit r13-8734-gcad27df08915ead8db3c7d512cfcc1866e7ece69
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Tue May 7 21:30:21 2024 +0200

    expansion: Use __trunchfbf2 calls rather than __extendhfbf2 [PR114907]

    The HF and BF modes have the same size/precision and neither is
    a subset nor superset of the other.
    So, using either __extendhfbf2 or __trunchfbf2 is weird.
    The expansion apparently emits __extendhfbf2, but on the libgcc side
    we apparently have __trunchfbf2 implemented.

    I think it is easier to switch to using what is available rather than
    adding new entrypoints to libgcc, even alias, because this is backporta=
ble.

    2024-05-07  Jakub Jelinek  <jakub@redhat.com>

            PR middle-end/114907
            * expr.cc (convert_mode_scalar): Use trunc_optab rather than
            sext_optab for HF->BF conversions.
            * optabs-libfuncs.cc (gen_trunc_conv_libfunc): Likewise.

            * gcc.dg/pr114907.c: New test.

    (cherry picked from commit 28ee13db2e9d995bd3728c4ff3a3545e24b39cd2)=