[Bug target/110786] New: bpf: make use of the V4 byte swap instructions

[Bug target/110786] New: bpf: make use of the V4 byte swap instructions

[jemarch at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110786

            Bug ID: 110786
           Summary: bpf: make use of the V4 byte swap instructions
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jemarch at gcc dot gnu.org
  Target Milestone: ---

The BPF V4 ISA introduces support for byte-swap instructions: bswap16, bswap32
and bswap64.  GCC shall be adapted to use these instructions for the builtins:

  __builtin_bswap{16,32,64}

[Bug target/110786] bpf: make use of the V4 byte swap instructions

[jemarch at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110786

Jose E. Marchesi <jemarch at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |jemarch at gcc dot gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-07-24

[Bug target/110786] bpf: make use of the V4 byte swap instructions

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110786

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jose E. Marchesi <jemarch@gcc.gnu.org>:

https://gcc.gnu.org/g:f1e34551e4d6e259ab3bd0c9aba4fa1f0c448214

commit r14-2741-gf1e34551e4d6e259ab3bd0c9aba4fa1f0c448214
Author: Jose E. Marchesi <jose.marchesi@oracle.com>
Date:   Mon Jul 24 10:56:27 2023 +0200

    bpf: make use of the bswap{16,32,64} V4 BPF instruction

    This patch makes the BPF backend to use the new V4 bswap{16,32,64}
    instructions in order to implement the __builtin_bswap{16,32,64}
    built-ins.  It also adds support for -mcpu=v4 and -m[no]bswap
    command-line options.  Tests and doc updates are includes.

    Tested in bpf-unknown-none.

    gcc/ChangeLog

            PR target/110786
            * config/bpf/bpf.opt (mcpu): Add ISA_V4 and make it the default.
            (mbswap): New option.
            * config/bpf/bpf-opts.h (enum bpf_isa_version): New value ISA_V4.
            * config/bpf/bpf.cc (bpf_option_override): Set bpf_has_bswap.
            * config/bpf/bpf.md: Use bswap instructions if available for
            bswap* insn, and fix constraint.
            * doc/invoke.texi (eBPF Options): Document -mcpu=v4 and -mbswap.

    gcc/testsuite/ChangeLog

            PR target/110786
            * gcc.target/bpf/bswap-1.c: Pass -mcpu=v3 to build test.
            * gcc.target/bpf/bswap-2.c: New test.

[Bug target/110786] bpf: make use of the V4 byte swap instructions

[jemarch at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110786

Jose E. Marchesi <jemarch at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #2 from Jose E. Marchesi <jemarch at gcc dot gnu.org> ---
GCC updated.